<SEC-DOCUMENT>0001493152-25-027310.txt : 20251211
<SEC-HEADER>0001493152-25-027310.hdr.sgml : 20251211
<ACCEPTANCE-DATETIME>20251211173137
ACCESSION NUMBER:		0001493152-25-027310
CONFORMED SUBMISSION TYPE:	S-1/A
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20251211
DATE AS OF CHANGE:		20251211

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Shuttle Pharmaceuticals Holdings, Inc.
		CENTRAL INDEX KEY:			0001757499
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		EIN:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-1/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-291628
		FILM NUMBER:		251565917

	BUSINESS ADDRESS:	
		STREET 1:		401 PROFESSIONAL DRIVE
		STREET 2:		SUITE 260
		CITY:			GAITHERSBURG
		STATE:			MD
		ZIP:			20879
		BUSINESS PHONE:		(240) 403-4212

	MAIL ADDRESS:	
		STREET 1:		401 PROFESSIONAL DRIVE
		STREET 2:		SUITE 260
		CITY:			GAITHERSBURG
		STATE:			MD
		ZIP:			20879
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-1/A
<SEQUENCE>1
<FILENAME>forms-1a.htm
<DESCRIPTION>S-1/A
<TEXT>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">As
filed with the Securities and Exchange Commission on December 11, 2025</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: right"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: right"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Registration
No. 333-291628 </B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 18pt"><B>UNITED
STATES</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 18pt"><B>SECURITIES
AND EXCHANGE COMMISSION</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 12pt"><B>Washington,
D.C. 20549</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 18pt"><B>FORM
S-1</B></FONT></P>

<P STYLE="text-align: center; margin-top: 0pt; font: 10pt Times New Roman, Times, Serif; margin-bottom: 0pt"> <B>(Amendment No. 1)</B> </P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>REGISTRATION
STATEMENT UNDER THE SECURITIES ACT OF 1933</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 18pt"><B>SHUTTLE
    PHARMACEUTICALS HOLDINGS, INC.</B></FONT></TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Exact
    name of registrant as specified in its charter)</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="font: 10pt Times New Roman, Times, Serif">
    <TD STYLE="border-bottom: black 1pt solid; font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; width: 32%; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Delaware</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 2%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; width: 32%; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">2834</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 2%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; width: 32%; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">82-5089826</FONT></TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(State
                                            or other jurisdiction of</FONT></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">incorporation
    or organization)</FONT></P></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Primary
                                            Standard Industrial</FONT></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Classification
    Code Number)</FONT></P></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(I.R.S.
                                            Employer</FONT></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Identification
    No.)</FONT></P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">401
Professional Drive, Suite 260</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Gaithersburg,
MD 20879 (240) 430-4212</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Address,
including zip code, and telephone number,</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">including
area code, of registrant&rsquo;s principal executive offices)</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Christopher
Cooper</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Interim
Chief Executive Officer</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Shuttle
Pharmaceuticals Holdings, Inc.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">401
Professional Drive, Suite 260</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Gaithersburg,
MD 20879 (240) 430-4212</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Name,
address, including zip code, and telephone number,</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">including
area code, of agent for service)</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><I>Copies
to:</I></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>David
E. Danovitch, Esq.<BR>
Aaron M. Schleicher, Esq.<BR>
Sullivan &amp; Worcester LLP<BR>
1251 Avenue of the Americas, 19<SUP>th</SUP> Floor<BR>
New York, NY 10020<BR>
(212) 660-3060</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">From
time to time after this registration statement becomes effective.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Approximate
date of commencement of proposed sale to the public)</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">If
any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the
Securities Act of 1933 check the following box. &#9746;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 33.75pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">If
this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following
box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.
&#9744;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 33.75pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">If
this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the
Securities Act registration statement number of the earlier effective registration statement for the same offering. &#9744;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 33.75pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">If
this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the
Securities Act registration statement number of the earlier effective registration statement for the same offering. &#9744;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 33.75pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Indicate
by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company,
or an emerging growth company. See the definitions of &ldquo;large accelerated filer,&rdquo; &ldquo;accelerated filer,&rdquo; &ldquo;smaller
reporting company,&rdquo; and &ldquo;emerging growth company&rdquo; in Rule 12b-2 of the Exchange Act.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 30%; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Large
    accelerated filer</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 20%; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9744;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 30%; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Accelerated
    filer</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 20%; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9744;</FONT></TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Non-accelerated
    filer</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9746;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Smaller
    reporting company</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9746;</FONT></TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Emerging
    growth company</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9746;</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">If
an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying
with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. &#9744;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>The
Registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the
Registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective
in accordance with Section 8(a) of the Securities Act of 1933, as amended, or until the Registration Statement shall become effective
on such date as the Securities and Exchange Commission, acting pursuant to Section 8(a), may determine.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"></FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt; color: Red"><B>The
information in this preliminary prospectus is not complete and may be changed. These securities may not be sold until the registration
statement filed with the Securities and Exchange Commission is effective. This preliminary prospectus is not an offer to sell nor does
it seek an offer to buy these securities in any state or other jurisdiction where the offer or sale is not permitted.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt; color: Red">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 33%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt; color: Red"><B>PRELIMINARY
    PROSPECTUS</B></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 34%; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt; color: Red"><B>SUBJECT
    TO COMPLETION </B></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 33%; text-align: right"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt; color: Red"><B>DATED
    DECEMBER 11, 2025</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Shuttle
Pharmaceuticals Holdings, Inc.</B></FONT></P>

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>625,156
Shares of Common Stock</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pursuant
to this prospectus, the selling stockholder identified herein is offering on a resale basis 625,156 shares of common stock of Shuttle
Pharmaceuticals Holdings, Inc., consisting of 625,156 shares of common stock issuable upon exercise of a pre-funded warrant, exercisable
at a nominal exercise price per share of $0.001, without expiration. The pre-funded warrant was issued to the selling stockholder in
connection with a private placement we completed on November 4, 2025. We will not receive any of the proceeds from the sale by the selling
stockholder of the shares.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
selling stockholder may sell or otherwise dispose of the shares covered by this prospectus in a number of different ways and at varying
prices. We provide more information about how the selling stockholder may sell or otherwise dispose of the shares covered by this prospectus
in the section entitled &ldquo;<U>Plan of Distribution</U>&rdquo; on page 8. Discounts, concessions, commissions and similar
selling expenses attributable to the sale of shares covered by this prospectus will be borne by the selling stockholder. We will pay
all expenses (other than discounts, concessions, commissions and similar selling expenses) relating to the registration of the shares
with the Securities and Exchange Commission, or the SEC.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">You
should carefully read this prospectus, together with the documents we incorporate by reference, before you invest in our common stock.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our
common stock is listed on The Nasdaq Capital Market under the symbol &ldquo;SHPH.&rdquo; On December 10, 2025, the last reported
sale price for our common stock was $1.85 per share.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Investing
in our common stock involves substantial risk. Please read &ldquo;<U>Risk Factors</U>&rdquo; beginning on page 6 of this prospectus
and in the documents we incorporate by reference.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Neither
the SEC nor any state securities commission has approved or disapproved of these securities or passed upon the accuracy or adequacy of
this prospectus. Any representation to the contrary is a criminal offense.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
date of this prospectus is ____, 2025</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"></P>

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OF CONTENTS</B></FONT></P>

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    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#a_001">ABOUT THIS PROSPECTUS</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 48px; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4</FONT></TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; background-color: white">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#a_002">SUMMARY</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4</FONT></TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; background-color: #CCEEFF">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#a_003">RISK FACTORS</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">6</FONT></TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; background-color: white">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#a_004">CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">6</FONT></TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; background-color: #CCEEFF">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#a_005">USE OF PROCEEDS</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">6</FONT></TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; background-color: white">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#a_006">SELLING STOCKHOLDER</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">7</FONT></TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; background-color: #CCEEFF">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#a_007">PLAN OF DISTRIBUTION</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">8</FONT></TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; background-color: white">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#a_008">LEGAL MATTERS</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">9</FONT></TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; background-color: #CCEEFF">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#a_009">EXPERTS</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">9</FONT></TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; background-color: white">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#a_010">INFORMATION INCORPORATED BY REFERENCE</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10</FONT></TD></TR>
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    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#a_011">WHERE YOU CAN FIND MORE INFORMATION</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10</FONT></TD></TR>
  </TABLE>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><A NAME="a_001"></A>ABOUT
THIS PROSPECTUS</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">This
prospectus is part of a registration statement that we have filed with the SEC pursuant to which the selling stockholder named herein
may, from time to time, offer and sell or otherwise dispose of the shares of our common stock covered by this prospectus. You should
not assume that the information contained in this prospectus is accurate on any date subsequent to the date set forth on the front cover
of this prospectus or that any information we have incorporated by reference is correct on any date subsequent to the date of the document
incorporated by reference, even though this prospectus is delivered or shares of common stock are sold or otherwise disposed of on a
later date. It is important for you to read and consider all information contained in this prospectus, including the documents incorporated
by reference therein, in making your investment decision. You should also read and consider the information in the documents to which
we have referred you under &ldquo;Where You Can Find More Information&rdquo; and &ldquo;Information Incorporated by Reference&rdquo;
in this prospectus.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
have not authorized anyone to give any information or to make any representation to you other than those contained or incorporated by
reference in this prospectus. You must not rely upon any information or representation not contained or incorporated by reference in
this prospectus. This prospectus does not constitute an offer to sell or the solicitation of an offer to buy any of our shares of common
stock other than the shares of our common stock covered hereby, nor does this prospectus constitute an offer to sell or the solicitation
of an offer to buy any securities in any jurisdiction to any person to whom it is unlawful to make such offer or solicitation in such
jurisdiction. Persons who come into possession of this prospectus in jurisdictions outside the United States are required to inform themselves
about, and to observe, any restrictions as to the offering and the distribution of this prospectus applicable to those jurisdictions.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">As
used in this prospectus and unless otherwise indicated, the terms &ldquo;we,&rdquo; &ldquo;us,&rdquo; &ldquo;our,&rdquo; &ldquo;Shuttle
Pharma,&rdquo; or the &ldquo;Company&rdquo; refer to Shuttle Pharmaceuticals Holdings, Inc. and its consolidated subsidiaries.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">All
share amounts in this prospectus give effect to our 1-for-25 reverse stock split effected on June 16, 2025, unless otherwise indicated.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><A NAME="a_002"></A>SUMMARY</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>About
Us&mdash;Business Overview</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"> On November 21, 2025,
it was announced that substantially all of the assets and liabilities of Molecule.ai, a pharmaceutical software company building an artificial
intelligence (&ldquo;AI&rdquo;) driven platform for molecular discovery and early-stage drug development, were acquired by a wholly owned
subsidiary of the Company. By combining modern AI techniques with structured scientific workflows, the Molecule.ai platform (hereafter,
&ldquo;Molecule.ai&rdquo; or the &ldquo;platform&rdquo;) helps researchers explore the chemical space more efficiently, evaluate molecular
ideas with greater clarity and make more informed decisions during the earliest stages of drug development. The platform is engineered
to accelerate the iteration cycles that characterize modern drug discovery while preserving scientific reproducibility, traceability
and operational reliability. Molecule.ai adapts state of the art AI algorithms to create a practical, domain-specific AI infrastructure
layer for molecular research and development. The acquisition seeks to leverage Molecule.ai&rsquo;s molecular modeling and predictive
analytics platform to significantly augment our drug discovery and development business purpose. In tandem with the Molecule.ai asset
acquisition, on November 20, 2025, the Company committed to a plan to discontinue its clinical trials of Ropidoxuridine (the &ldquo;Clinical
Trials&rdquo;), our lead product candidate. </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in"> &nbsp; </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"> Molecule.ai is built on
three core architectural components: a unified inference engine, an API-first integration layer and a modular model framework. The unified
inference engine orchestrates model execution and multi-step reasoning through a deterministic and traceable sequence of operations.
Molecule.ai uses an API-first design, which means that all platform capabilities can be accessed programmatically. All predictive and
reasoning functions are modular, which allows the platform to expand over time without changing the underlying infrastructure. Molecule.ai
currently supports three scientific and computational functions that reflect both its pharmaceutical focus and the structured inference
techniques seen in modern agentic LLM systems: (1) molecular property prediction, (2) cross-molecule and cross-property evaluation and
(3) prediction reasoning and structured molecular insights. The platform predicts a wide range of molecular properties that are relevant
to early-stage discovery and medicinal chemistry and provides inference pipelines for predicting molecular properties. By using transformer-based
models, the platform computes predictive outputs on a wide range of therapeutic tasks. The platform evaluates multiple molecules across
multiple properties in a unified workflow, helping researchers quickly identify the most-promising candidates, understand trade-offs,
and make structured, evidence-based decisions. Molecule.ai also includes a reasoning module that uses LLM-based structured inference
to contextualize predictions, explain differences between compounds, perform rule-guided reasoning and produce narrative or structured
scientific interpretations with the goal to make complex scientific outputs understandable and actionable for broader research and development
audiences. </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in"> &nbsp; </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"> The broader competitive
landscape in the AI ecosystem, especially AI-driven drug discovery, is rapidly advancing toward agentic AI systems and more integrated,
end-to-end platforms. To stay at the front of this shift, Molecule.ai is expanding its molecule predictive capabilities, and automated
multi-tool workflows. These expansions are designed in accordance with the agentic framework and multi-tool reasoning to further strengthen
the platform. A new module will evaluate chemical&ndash;protein interaction likelihoods, which will help researchers estimate how molecules
may interact with specific biological targets. Molecule.ai is adding biological context reasoning supported by curated genomic and disease-association
evidence, which helps tie together chemical ideas with the biological systems they may ultimately affect. The platform will increasingly
support insights that connect chemical properties with biological implications, which creates a more complete, end-to-end picture for
early research teams. Molecule.ai is also developing an autonomous AI agent designed to reduce manual workload and accelerate early research
cycles, which will interpret a discovery objective, plan a series of actions, route each step to the appropriate tools, evaluate preliminary
outputs and iterate until a stable result is achieved. </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in"> &nbsp; </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"> The Molecule.ai platform
adheres to strict engineering standards, including reproducibility, traceability, extensibility, scalability and interoperability, which
align with modern AI infrastructure expectations for regulated biomedical environments. Molecule.ai aims to become the foundational AI
layer for molecular and biological reasoning in pharmaceutical research and development. By integrating property prediction, biological
context, multi-step reasoning and agentic automation, the platform seeks to accelerate early discovery while maintaining scientific reliability
and operational transparency. </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"> &nbsp; </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"> We are still evaluating
additional business impacts from the discontinuance of the Clinical Trials and the acquisition of Molecule.ai, all of which could materially
affect our plans and financial position. </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Corporate
Information</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
Company was formed as a limited liability company in the state of Maryland in December 2012 and was converted to a C corporation in August
2016. In June 2018, we completed a share exchange with Shuttle Pharma Acquisition Corp. Inc. (&ldquo;Acquisition Corp.&rdquo;), pursuant
to which Shuttle Pharmaceuticals, Inc. became a subsidiary of Acquisition Corp. and we subsequently changed the name of Acquisition Corp.
to Shuttle Pharmaceuticals Holdings, Inc.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our
executive offices are located at 401 Professional Drive, Suite 260, Gaithersburg, MD 20879 and our telephone number is (240) 430-4212.
Our corporate website is www.shuttlepharma.com. Our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form
8-K, and all amendments to those reports, if any, are available to you free of charge through the &ldquo;Investor Relations&rdquo; section
of our website as soon as reasonably practicable after such materials have been electronically filed with or furnished to the SEC. Information
contained on our website does not form a part of this prospectus.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Private
Placement</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">On
November 3, 2025, we entered into a securities purchase agreement (the &ldquo;Purchase Agreement&rdquo;) with an accredited investor,
for the sale by the Company to the investor, in a private placement, of a pre-funded warrant to purchase up to 625,156 shares of common
stock for aggregate gross proceeds of approximately $2.5 million. The private placement closed on November 4, 2025.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
pre-funded warrant is immediately exercisable, at a nominal exercise price of $0.001, and may be exercised at any time until the pre-funded
warrant is exercised in full. The pre-funded warrant may not be exercised to the extent such exercise would result in the holder beneficially
owning more than 4.99% of the Company&rsquo;s outstanding common stock.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pursuant
to the Purchase Agreement, the Company agreed to file a registration statement with the SEC to register for resale the shares of the
shares issuable upon exercise of the pre-funded warrant issued under the Purchase Agreement within 15 days of the date of the Purchase
Agreement, and to have such registration statement declared effective within 45 days of the date of the Purchase Agreement (or 75 days
if the registration statement is reviewed by the SEC).</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">WestPark
Capital, Inc. (&ldquo;WestPark&rdquo;) acted as the placement agent in connection with the private placement pursuant to a placement
agency agreement between the Company and WestPark (as amended, the &ldquo;Placement Agency Agreement&rdquo;). Pursuant to the Placement
Agency Agreement, the Company paid WestPark a cash fee of 4% of the gross proceeds received by the Company in the private placement.
The Company also reimbursed certain expenses of WestPark.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">This
prospectus covers the resale of the 625,156 shares of common stock issuable upon exercise of the pre-funded warrant issued under the
Purchase Agreement.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><A NAME="a_003"></A>RISK
FACTORS</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><I>An
investment in our securities involves a high degree of risk. Before deciding whether to invest in our securities, you should consider
carefully the risks and uncertainties discussed below, as well as those under the heading &ldquo;Risk Factors&rdquo; contained in our
most recent annual report on Form 10-K filed with the SEC, and as incorporated by reference in this prospectus, as the same may be amended,
supplemented or superseded by the risks and uncertainties described under similar headings in the other documents that are filed by us
after the date hereof and incorporated by reference into this prospectus. Please also read carefully the section below titled &ldquo;Cautionary
Note Regarding Forward-Looking Statements.&rdquo;</I></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><I>The
sale of a substantial amount of our common stock, including resale of the shares of common stock by the selling stockholder in the public
market, could adversely affect the market price of our common stock.</I></B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
are registering for resale 625,156 shares of common stock issuable upon the exercise of a pre-funded warrant held by the selling stockholder.
Sales of substantial amounts of our common stock in the public market, or the perception that such sales might occur, could adversely
affect the market price of our common stock. We cannot predict if and when the selling stockholder may sell such shares in the public
market.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 24pt"> &nbsp; </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"> <B><I>Recent and future
acquisitions may have a material adverse effect on our ability to manage our business and our results of operations and financial condition.</I></B> </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 66.8pt 0pt 56pt; text-align: justify"> &nbsp; </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"> We may acquire assets,
businesses, technologies, services, or products which are complementary to our operations. Recent and future acquisitions, including
the now complete asset acquisition pursuant to the Asset Purchase Agreement with 1563868 B.C. Ltd., a Canadian limited corporation, and
the Company&rsquo;s wholly owned subsidiary, 1542770 BC Ltd., a Canadian limited corporation, and the related employment contract with
Zhitian (Andy) Zhang, an individual residing in Vancouver, Canada (the &ldquo;Asset Purchase&rdquo;), may expose us to potential risks,
including risks associated with not receiving the intended benefits of the Asset Purchase, the diversion of resources and management
attention from our existing business and technology, the costs and expenses incurred in connection with such acquisitions, or the potential
loss of or harm to relationships with suppliers, employees, and potential customers resulting from our integration of a new asset class.
If any of these risks were to occur, our operations could be materially and adversely affected. </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 55pt 0pt 0.75in; text-align: justify"> &nbsp; </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"> <B><I>If we are unable
to acquire and retain new customers for our Molecule.ai platform or if those customers renew licenses at lower prices, our future revenues
may be negatively impacted.</I></B> </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"> <B><I>&nbsp;</I></B> </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"> We expect to derive a
significant portion of our revenues from license agreements related to our Molecule.ai platform. As a result, acquiring new customers
and maintaining the renewal rate of those new customers is critical to our future operating results. Factors that may affect the acquisition
of new customers and renewal rates for future customers include: </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"> &nbsp; </P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font-size: 10pt; width: 100%">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 24px"> &nbsp; </TD>
    <TD STYLE="width: 24px; font-size: 10pt"> <FONT STYLE="font-size: 10pt">&#9679;</FONT> </TD>
    <TD STYLE="font-size: 10pt; text-align: justify"> <FONT STYLE="font-size: 10pt">the price, performance, and functionality of our
    platform;</FONT> </TD></TR>
  <TR STYLE="vertical-align: top">
    <TD> &nbsp; </TD>
    <TD STYLE="font-size: 10pt"> <FONT STYLE="font-size: 10pt">&#9679;</FONT> </TD>
    <TD STYLE="font-size: 10pt; text-align: justify"> <FONT STYLE="font-size: 10pt">the availability, price, performance, and functionality
    of competing software solutions;</FONT> </TD></TR>
  <TR STYLE="vertical-align: top">
    <TD> &nbsp; </TD>
    <TD STYLE="font-size: 10pt"> <FONT STYLE="font-size: 10pt">&#9679;</FONT> </TD>
    <TD STYLE="font-size: 10pt; text-align: justify"> <FONT STYLE="font-size: 10pt">the success of competitive products or technologies;</FONT> </TD></TR>
  <TR STYLE="vertical-align: top">
    <TD> &nbsp; </TD>
    <TD STYLE="font-size: 10pt"> <FONT STYLE="font-size: 10pt">&#9679;</FONT> </TD>
    <TD STYLE="font-size: 10pt; text-align: justify"> <FONT STYLE="font-size: 10pt">the stability, performance, and security of our
    technological infrastructure; and</FONT> </TD></TR>
  <TR STYLE="vertical-align: top">
    <TD> &nbsp; </TD>
    <TD STYLE="font-size: 10pt"> <FONT STYLE="font-size: 10pt">&#9679;</FONT> </TD>
    <TD STYLE="font-size: 10pt; text-align: justify"> <FONT STYLE="font-size: 10pt">the business environment of our future customers.</FONT> </TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 55pt 0pt 0; text-align: justify"> &nbsp; </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in"> If we fail to acquire
new customers, if we are unable to successfully renew agreements with such clients or if clients renew such agreements upon less favorable
terms or at lower fee levels, our future revenues may be negatively impacted. </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center; text-indent: 24pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><A NAME="a_004"></A>CAUTIONARY
NOTE REGARDING FORWARD-LOOKING STATEMENTS</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">All statements in this prospectus
and the documents incorporated by reference that are not historical facts should be considered &ldquo;Forward Looking Statements&rdquo;
within the meaning of the &ldquo;Safe Harbor&rdquo; provisions of the Private Securities Litigation Reform Act of 1995. Such statements
involve known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements of the Company
to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements.
Some of the forward-looking statements can be identified by the use words such as &ldquo;believe,&rdquo; &ldquo;expect,&rdquo; &ldquo;may,&rdquo;
&ldquo;estimates,&rdquo; &ldquo;should,&rdquo; &ldquo;seek,&rdquo; &ldquo;approximately,&rdquo; &ldquo;intend,&rdquo; &ldquo;plan,&rdquo;
&ldquo;estimate,&rdquo; &ldquo;project,&rdquo; &ldquo;continue&rdquo; or &ldquo;anticipates&rdquo; or similar expressions or words, or
the negatives of those expressions or words. These statements may be made directly in this prospectus and they may also be incorporated
by reference in this prospectus from other documents filed with the SEC, and include, but are not limited to, statements about future
financial and operating results and performance, statements about our plans, objectives, expectations and intentions with respect to
future operations and products, and other statements that are not historical facts. These forward-looking statements are based upon the
current beliefs and expectations of our management and are inherently subject to significant business, economic and competitive uncertainties
and contingencies, many of which are difficult to predict and generally beyond our control. In addition, these forward-looking statements
are subject to assumptions with respect to future business strategies and decisions that are subject to change. Actual results may differ
materially from the anticipated results discussed in these forward-looking statements as a result of several factors including, but not
limited to, risks regarding our ability to continue as a going concern in the near term being dependent upon us successfully raising
additional equity or debt financing to fund our operations, risks regarding volatility of our stock price, risks regarding future issuance
of equity or of debt securities diluting our share capital, risks regarding our successful transition of our business from the
development, regulatory approval and commercialization of our product candidates, <FONT STYLE="color: #231F20">our ability to recognize
the&nbsp;anticipated benefits&nbsp;of the Asset Purchase</FONT>, expectations as to our future performance, our ability to remain listed
on the Nasdaq Capital Market, as well as those noted under &ldquo;Risk Factors&rdquo; in this prospectus and in the documents incorporated
by reference in this prospectus.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><A NAME="a_005"></A>USE
OF PROCEEDS</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
will not receive any of the proceeds from any sale or other disposition of the shares of common stock covered by this prospectus. All
proceeds from the sale of the shares will be paid directly to the selling stockholder.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><A NAME="a_006"></A>SELLING
STOCKHOLDER</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
shares of common stock being offered by the selling stockholder are those underlying the pre-funded warrant issued to the selling stockholder
under the Purchase Agreement dated November 3, 2025 (see &ldquo;Summary&mdash;Private Placement&rdquo;). We are registering the shares
of common stock in order to permit the selling stockholder to offer the shares for resale from time to time. Except for the ownership
of the shares of common stock and as otherwise disclosed in this prospectus and as disclosed in this section under &ldquo;Material Relationships
with Selling Stockholder&rdquo; below, the selling stockholder has not had any material relationship with us within the past three years.
The selling stockholder is not a broker-dealer or an affiliate of a broker-dealer.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
table below lists the selling stockholder and other information regarding the beneficial ownership of the shares of common stock by the
selling stockholder. The second column lists the number of shares of common stock beneficially owned by the selling stockholder, as of
December 10, 2025. The third column lists the shares of common stock being offered by this prospectus by the selling stockholder.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">In
accordance with the terms of the Purchase Agreement, this prospectus covers the resale of the number of shares of common stock underlying
a pre-funded warrant issued to the selling stockholder under the Purchase Agreement. The fourth column assumes the sale of all of the
shares offered by the selling stockholder pursuant to this prospectus.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
selling stockholder may sell all, some or none of its shares in this offering. See &ldquo;Plan of Distribution.&rdquo;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="font-weight: bold; border-bottom: Black 1pt solid">Selling Stockholder</TD><TD STYLE="font-weight: bold; padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="font-weight: bold; border-bottom: Black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Number of shares beneficially owned prior to offering<SUP>(1)</SUP></B></FONT></TD><TD STYLE="padding-bottom: 1pt; font-weight: bold">&nbsp;</TD><TD STYLE="font-weight: bold; padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="font-weight: bold; border-bottom: Black 1pt solid">Number of shares offered</TD><TD STYLE="padding-bottom: 1pt; font-weight: bold">&nbsp;</TD><TD STYLE="font-weight: bold; padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="font-weight: bold; border-bottom: Black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Number
    of shares beneficially owned after offering<SUP>(2)</SUP></B></FONT></TD><TD STYLE="padding-bottom: 1pt; font-weight: bold">&nbsp;</TD><TD STYLE="font-weight: bold; padding-bottom: 1pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="font-weight: bold; border-bottom: Black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Percentage of shares beneficially owned after offering<SUP>(3)</SUP></B></FONT></TD><TD STYLE="padding-bottom: 1pt; font-weight: bold">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 32%; text-align: left"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Alternative Investment Capital Inc.<SUP>(4)</SUP></FONT></TD><TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 12%; text-align: right">780,877</TD><TD STYLE="padding-bottom: 5px; width: 1%; text-align: left"><SUP>(5)</SUP></TD><TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 12%; text-align: right">625,156</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 12%; text-align: right">1,406,033</TD><TD STYLE="padding-bottom: 5px; width: 5%; text-align: left"><SUP>(5) (6)</SUP></TD><TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 12%; text-align: right">47.1</TD><TD STYLE="width: 1%; text-align: left">%</TD></TR>
  </TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(1)
Under applicable SEC rules, a person is deemed to beneficially own securities which the person has the right to acquire within 60 days
through the exercise of any option or warrant or through the conversion of a convertible security. Also under applicable SEC rules, a
person is deemed to be the &ldquo;beneficial owner&rdquo; of a security with regard to which the person directly or indirectly, has or
shares (a) voting power, which includes the power to vote or direct the voting of the security, or (b) investment power, which includes
the power to dispose, or direct the disposition, of the security, in each case, irrespective of the person&rsquo;s economic interest
in the security. To our knowledge, subject to community property laws where applicable, the selling stockholder named in the table has
sole voting and investment power with respect to the common stock shown as beneficially owned by the selling stockholder, except as otherwise
set forth in the footnotes to the table.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(2)
Represents the amount of shares that will be held by the selling stockholder after completion of this offering based on the assumptions
that (a) all shares of common stock offered for resale under this prospectus will be sold and (b) no other shares of common stock are
acquired or sold by the selling stockholder prior to completion of this offering. However, the selling stockholder may sell all, some
or none of such shares offered pursuant to this prospectus.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(3)
Based on 1,603,285 shares of common stock outstanding as of December 10, 2025.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(4)
Connor Yuen has voting and dispositive power over the shares. The address of the selling stockholder is 850 New Burton Road, Suite 201,
Dover, DE 19904.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(5)
Includes 758,953 (prior to this filing) shares issuable upon exercise of a pre-funded warrant. The pre-funded warrant cannot be exercised
to the extent such exercise would result in the holder beneficially owning more than 4.99% of the Company&rsquo;s common stock. The ownership
amount in the table does not give effect to such beneficial ownership limitation.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="text-align: justify; font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(6)
Includes 625,156 shares issuable upon exercise of a pre-funded warrant. The pre-funded warrant cannot be exercised to the extent such
exercise would result in the holder beneficially owning more than 4.99% of the Company&rsquo;s common stock. The ownership amount in
the table does not give effect to such beneficial ownership limitation.</FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Material
Relationships with Selling Stockholder</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><I>June
2025 Private Placement</I></B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">On
June 20, 2025, we entered into a securities purchase agreement with the selling stockholder (the &ldquo;June 2025 Purchase Agreement&rdquo;),
for the sale by the Company to the selling stockholder, in a private placement, of 21,924 shares of common stock of the Company and 1,158,953
pre-funded warrants, each to purchase one share of common stock of the Company at a purchase price of $3.599&nbsp;and exercise price
of $0.001&nbsp;per pre-funded warrant (the &ldquo;June 2025 Private Placement&rdquo;). The June 2025 Private Placement closed on June
24, 2025 and we received gross proceeds of approximately $4.3 million before deducting fees and other offering expenses payable by us.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Other
than the transactions described above and in &ldquo;The Private Placement,&rdquo; we have had no material relationships with the selling
stockholder in the last three (3) years.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><A NAME="a_007"></A>PLAN
OF DISTRIBUTION</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
selling stockholder and any of its pledgees, assignees and successors-in-interest may, from time to time, sell any or all of its securities
covered hereby on the Nasdaq Capital Market or any other stock exchange, market or trading facility on which the securities are traded
or in private transactions. These sales may be at fixed or negotiated prices. The selling stockholder may use any one or more of the
following methods when selling securities:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">ordinary
    brokerage transactions and transactions in which the broker-dealer solicits purchasers;</FONT></TD></TR>

<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">block
    trades in which the broker-dealer will attempt to sell the securities as agent but may position and resell a portion of the block
    as principal to facilitate the transaction;</FONT></TD></TR>

<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">purchases
    by a broker-dealer as principal and resale by the broker-dealer for its account;</FONT></TD></TR>

<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">an
    exchange distribution in accordance with the rules of the applicable exchange;</FONT></TD></TR>

<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">privately
    negotiated transactions;</FONT></TD></TR>

<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">settlement
    of short sales;</FONT></TD></TR>

<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">in
    transactions through broker-dealers that agree with the selling stockholder to sell a specified number of such securities at a stipulated
    price per security;</FONT></TD></TR>

<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">through
    the writing or settlement of options or other hedging transactions, whether through an options exchange or otherwise;</FONT></TD></TR>

<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">a
    combination of any such methods of sale; or</FONT></TD></TR>

<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">any
    other method permitted pursuant to applicable law.</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
selling stockholder may also sell securities under Rule 144 or any other exemption from registration under the Securities Act of 1933,
as amended, or the Securities Act, if available, rather than under this prospectus.</FONT></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"></FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Broker-dealers
engaged by the selling stockholder may arrange for other brokers-dealers to participate in sales. Broker-dealers may receive commissions
or discounts from the selling stockholder (or, if any broker-dealer acts as agent for the purchaser of securities, from the purchaser)
in amounts to be negotiated, but, except as set forth in a supplement to this prospectus, in the case of an agency transaction not in
excess of a customary brokerage commission in compliance with FINRA Rule 2121; and in the case of a principal transaction a markup or
markdown in compliance with FINRA Rule 2121.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">In
connection with the sale of the securities or interests therein, the selling stockholder may enter into hedging transactions with broker-dealers
or other financial institutions, which may in turn engage in short sales of the securities in the course of hedging the positions they
assume. The selling stockholder may also sell securities short and deliver these securities to close out its short positions, or loan
or pledge the securities to broker-dealers that in turn may sell these securities. The selling stockholder may also enter into option
or other transactions with broker-dealers or other financial institutions or create one or more derivative securities which require the
delivery to such broker-dealer or other financial institution of securities offered by this prospectus, which securities such broker-dealer
or other financial institution may resell pursuant to this prospectus (as supplemented or amended to reflect such transaction).</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
selling stockholder and any broker-dealers or agents that are involved in selling the securities may be deemed to be &ldquo;underwriters&rdquo;
within the meaning of the Securities Act in connection with such sales. In such event, any commissions received by such broker-dealers
or agents and any profit on the resale of the securities purchased by them may be deemed to be underwriting commissions or discounts
under the Securities Act. The selling stockholder has informed the Company that it does not have any written or oral agreement or understanding,
directly or indirectly, with any person to distribute the securities.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
Company is required to pay certain fees and expenses incurred by the Company incident to the registration of the securities. The Company
has agreed to indemnify the selling stockholder against certain losses, claims, damages and liabilities, including liabilities under
the Securities Act.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
agreed to keep this prospectus effective until (i) the date on which the securities may be resold by the selling stockholder without
registration and without regard to any volume or manner-of-sale limitations by reason of Rule 144 without the requirement for the Company
to be in compliance with the current public information under Rule 144 under the Securities Act or any other rule of similar effect or
(ii) all of the securities have been sold pursuant to this prospectus or Rule 144 under the Securities Act or any other rule of similar
effect. The resale securities will be sold only through registered or licensed brokers or dealers if required under applicable state
securities laws. In addition, in certain states, the resale securities covered hereby may not be sold unless they have been registered
or qualified for sale in the applicable state or an exemption from the registration or qualification requirement is available and is
complied with.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Under
applicable rules and regulations under the Securities Exchange Act of 1934, as amended, or the Exchange Act, any person engaged in the
distribution of the resale securities may not, subject to certain exceptions, simultaneously engage in market making activities with
respect to the common stock for the applicable restricted period, as defined in Regulation M, prior to the commencement of the distribution.
In addition, the selling stockholder will be subject to applicable provisions of the Exchange Act and the rules and regulations thereunder,
including Regulation M, which may limit the timing of purchases and sales of the common stock by the selling stockholder or any other
person. We will make copies of this prospectus available to the selling stockholder and have informed it of the need to deliver a copy
of this prospectus to each purchaser at or prior to the time of the sale (including by compliance with Rule 172 under the Securities
Act).</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><A NAME="a_008"></A>LEGAL
MATTERS</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
validity of the shares of common stock offered in this prospectus has been passed upon for us by Sullivan &amp; Worcester LLP, New York,
New York.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><A NAME="a_009"></A>EXPERTS</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
consolidated financial statements of Shuttle Pharmaceuticals Holdings, Inc. as of and for the years ended December 31, 2024 and 2023
incorporated by reference in this prospectus and in the registration statement of which this prospectus forms a part, have been so incorporated
in reliance on the report of Forvis Mazars, LLP, an independent registered public accounting firm. Such consolidated financial statements
have been incorporated herein in reliance upon such report given on the authority of such firm as experts in accounting and auditing.
The report of Forvis Mazars, LLP contains an explanatory paragraph regarding substantial doubt about the Company&rsquo;s ability to continue
as a going concern.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><A NAME="a_010"></A>INFORMATION
INCORPORATED BY REFERENCE</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
SEC allows us to &ldquo;incorporate by reference&rdquo; information that we file with them. Incorporation by reference allows us to disclose
important information to you by referring you to those other documents. The information incorporated by reference is an important part
of this prospectus, and information that we file later with the SEC will automatically update and supersede this information. We filed
a registration statement on Form S-1 under the Securities Act with the SEC with respect to the securities being offered pursuant to this
prospectus. This prospectus omits certain information contained in the registration statement, as permitted by the SEC. You should refer
to the registration statement, including the exhibits and schedules attached to the registration statement and the information incorporated
by reference, for further information about us and the securities being offered pursuant to this prospectus. The documents we are incorporating
by reference into this prospectus are:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our
    Annual Report on <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225008300/form10-k.htm" STYLE="-sec-extract: exhibit">Form 10-K</A> for the fiscal year ended December 31, 2024, filed with the SEC on February 26, 2025;</FONT></TD></TR>

<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our
    Quarterly Reports on Form 10-Q for the quarterly period ended March 31, 2025, filed with the SEC on <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000164117225009325/form10-q.htm" STYLE="-sec-extract: exhibit">May 8, 2025</A>, for the quarterly
    period ended June 30, 2025, filed with the SEC on <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000164117225023263/form10-q.htm" STYLE="-sec-extract: exhibit">August 13, 2025</A>, and for the quarterly period ended September 30, 2025, filed with
    the SEC on <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225022162/form10-q.htm" STYLE="-sec-extract: exhibit">November 13, 2025</A>;</FONT></TD></TR>

<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our
    Current Reports on Form 8-K filed with the SEC on <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225001132/form8-k.htm" STYLE="-sec-extract: exhibit">January
    7, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225002945/form8-k.htm" STYLE="-sec-extract: exhibit">January
    21, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225003985/form8-k.htm" STYLE="-sec-extract: exhibit">January
    28, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225008462/form8-k.htm" STYLE="-sec-extract: exhibit">February
    27, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225008742/form8-k.htm" STYLE="-sec-extract: exhibit">February
    28, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225009922/form8-k.htm" STYLE="-sec-extract: exhibit">March
    12, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225010211/form8-k.htm" STYLE="-sec-extract: exhibit">March
    13, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000164117225000595/form8-k.htm" STYLE="-sec-extract: exhibit">March
    25, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000164117225001880/form8-k.htm" STYLE="-sec-extract: exhibit">March
    31, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000164117225002757/form8-k.htm" STYLE="-sec-extract: exhibit">April
    4, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000164117225003603/form8-k.htm" STYLE="-sec-extract: exhibit">April
    10, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000164117225005553/form8-k.htm" STYLE="-sec-extract: exhibit">April
    21, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000164117225010964/form8-k.htm" STYLE="-sec-extract: exhibit">May
    15, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000164117225012536/form8-k.htm" STYLE="-sec-extract: exhibit">May
    28, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000164117225016394/form8-k.htm" STYLE="-sec-extract: exhibit">June
    25, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000164117225021566/form8-k.htm" STYLE="-sec-extract: exhibit">July
    30, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000164117225026719/form8-k.htm" STYLE="-sec-extract: exhibit">September
    5, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000164117225026867/form8-k.htm" STYLE="-sec-extract: exhibit">September
    8, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225013890/form8-k.htm" STYLE="-sec-extract: exhibit">September
    17, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225014097/form8-k.htm" STYLE="-sec-extract: exhibit">September
    18, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225014489/form8-k.htm" STYLE="-sec-extract: exhibit">September
    22, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225018788/form8-k.htm" STYLE="-sec-extract: exhibit">October
    21, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225021256/form8-k.htm" STYLE="-sec-extract: exhibit">November
    7, 2025</A> , <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225023845/form8-k.htm" STYLE="-sec-extract: exhibit">November
    17, 2025</A> , <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225024618/form8-k.htm">November 21, 2025</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225025082/form8-k.htm">November 26, 2025</A>, and <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225025430/form8-k.htm">November 28, 2025</A>; and</FONT></TD></TR>

<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
    description of our common stock contained in our Registration Statement on <A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222024265/form8a12b.htm" STYLE="-sec-extract: exhibit">Form
    8-A</A>, registering our common stock under Section 12(b) under the Exchange Act, filed with the SEC on August 29, 2022 (File No.
    001-41488), including any amendments or reports filed for the purpose of updating such description. </FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">All
documents subsequently filed by us with the SEC under Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act (other than current reports
on Form 8-K furnished pursuant to Item 2.02 or Item 7.01 of Form 8-K, including any exhibits included with such information, unless otherwise
indicated therein) prior to the termination or completion of the offering made pursuant to this prospectus are also incorporated herein
by reference and will automatically update and supersede information contained or incorporated by reference in this prospectus.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">You
may request a copy of these filings, at no cost, by writing or telephoning us at the following address: 401 Professional Drive, Suite
260, Gaithersburg, MD 20879, (240) 430-4212.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><A NAME="a_011"></A>WHERE
YOU CAN FIND MORE INFORMATION</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
have filed with the SEC a registration statement on Form S-1 under the Securities Act with respect to the securities offered hereby.
This prospectus, which constitutes a part of the registration statement, does not contain all of the information set forth in the registration
statement or the exhibits and schedules filed therewith. For further information about us and our securities offered hereby, we refer
you to the registration statement and the exhibits and schedules filed therewith. Statements contained in this prospectus regarding the
contents of any contract or any other document that is filed as an exhibit to the registration statement are not necessarily complete,
and each such statement is qualified in all respects by reference to the full text of such contract or other document filed as an exhibit
to the registration statement. The SEC maintains a website that contains reports, proxy and information statements and other information
regarding registrants that file electronically with the SEC. The address is www.sec.gov.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
are subject to the reporting requirements of the Exchange Act, and file annual, quarterly and current reports, proxy statements and other
information with the SEC. You can read our SEC filings, including the registration statement, over the Internet at the SEC&rsquo;s website<I>.
</I>We also maintain a website at www.shuttlepharma.com, at which you may access these materials free of charge as soon as reasonably
practicable after they are electronically filed with, or furnished to, the SEC. The information contained in, or that can be accessed
through, our website is not part of this prospectus.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"> <B>Shuttle Pharmaceuticals Holdings, Inc.</B> </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"> &nbsp; </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"> <B>625,156 Shares of Common Stock</B> </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"> <B>&nbsp;</B> </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"> <B>PROSPECTUS</B> </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"> &nbsp; </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; margin-top: 0pt; margin-bottom: 0pt"> <B>The date of this prospectus
is ____, 2025</B> </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"></P>

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    <DIV STYLE="break-before: page; margin-top: 6pt"><p style="margin: 0pt">&nbsp;</p></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>PART
II</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>INFORMATION
NOT REQUIRED IN PROSPECTUS</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item
13. Other Expenses of Issuance and Distribution</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
following table provides information regarding the various expenses (other than placement agent fees) payable by us in connection with
the issuance and distribution of the securities being registered hereby. All amounts shown are estimates except the SEC registration
fee.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
  <TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 80%; text-align: left">Securities and Exchange Commission Registration Fee</TD>
    <TD STYLE="width: 2%; text-align: left">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 16%; text-align: right">165.77</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left">Legal Fees and Expenses</TD>
    <TD STYLE="text-align: left">&nbsp;</TD>
    <TD STYLE="text-align: left">$</TD><TD STYLE="text-align: right">25,000.00</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left">Accounting Fees and Expenses</TD>
    <TD STYLE="text-align: left">&nbsp;</TD>
    <TD STYLE="text-align: left">$</TD><TD STYLE="text-align: right">20,000.00</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="padding-bottom: 1pt">Miscellaneous</TD>
    <TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: left">$</TD><TD STYLE="border-bottom: Black 1pt solid; text-align: right"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">1,834.23</FONT></TD><TD STYLE="padding-bottom: 1pt; text-align: left">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="padding-bottom: 2.5pt">Total</TD>
    <TD STYLE="padding-bottom: 2.5pt; text-align: left">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 2.5pt double; text-align: left">$</TD><TD STYLE="border-bottom: Black 2.5pt double; text-align: right"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">47,000.00</FONT></TD><TD STYLE="padding-bottom: 2.5pt; text-align: left">&nbsp;</TD></TR>
  </TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item
14. Indemnification of Directors and Officers</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Section
145 of the Delaware General Corporation Law authorizes us to indemnify any director or officer under certain prescribed circumstances
and subject to certain limitations against certain costs and expenses, including attorney&rsquo;s fees actually and reasonably incurred
in connection with any action, suit or proceeding, whether civil, criminal, administrative or investigative, to which a person is party
by reason of being one of our directors or officers if it is determined that such person acted in accordance with the applicable standard
of conduct set forth in such statutory provisions. Our certificate of incorporation contains provisions relating to the indemnification
of directors and officers and our by-laws extend such indemnities to the full extent permitted by Delaware law. We currently maintain
insurance for the benefit of any director or officer which cover claims for which we could not indemnify such persons.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Insofar
as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers or persons controlling us
pursuant to the foregoing provisions, or otherwise, we have been advised that in the opinion of the SEC, such indemnification is against
public policy as expressed in the Securities Act and is, therefore, unenforceable.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item
15. Recent Sales of Unregistered Securities</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">In
the three years preceding the filing of this registration statement, we sold the following securities that were not registered under
the Securities Act:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; background-color: white"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in; background-color: white"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">On
August 1, 2022, in conjunction with entering into three loan agreements for a total of $125,000, which were repayable following consummation
of our IPO, we issued warrants to purchase a total of 250 shares at $500 per share. Boustead Securities LLC acted as placement agent
and received warrants to purchase 25 shares at $500 per share, equal to 10% of the value of the note offering, and $12,500 in cash compensation.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in; background-color: white"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in; background-color: white"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">On
January 11, 2023, we entered into a stock purchase agreement with Alto Opportunity Master Fund, SPC &ndash; Segregated Master Portfolio
B (&ldquo;Alto&rdquo;), pursuant to which we sold to Alto a $4.3 million convertible note and warrant to purchase 5,091 shares of common
stock of the Company, for gross proceeds of $4.0 million. The convertible note amortizes on a monthly basis and the Company can make
such monthly amortization payments in cash or, subject to certain equity conditions, in registered shares of common stock or a combination
thereof. For equity repayment, the convertible note is convertible into shares of common stock at price per share equal to the lower
of (i) $470, (ii) 90% of the three lowest daily VWAPs of the 15 trading days prior to the payment date or (iii) 90% of the VWAP of the
trading day prior to payment date. The convertible note is repayable over 26 months and bears interest at the rate of 5% per year. The
warrant is exercisable for four years from the date of closing and is exercisable at $5.53 per share.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; background-color: white"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in; background-color: white"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">In
October 2024, the Company completed two closing in an up to $1.3 million, 5% original issue discount (&ldquo;OID&rdquo;) senior secured
convertible note warrant offering, pursuant to which the Company issued a total of $831,579 of notes and warrants to purchase 13,182
shares of common stock, exercisable at a weighted-average price of $35.59 per share. The notes bear interest at the rate of 14.5% per
year, with the interest payable quarterly in cash, mature one year after the date of issuance, are redeemable at any time by the Company
at a 107% premium to the principal value of the notes and, three months after issuance, can be converted at any time by the holder at
a 110% premium to the principal value of the note. Of the above investment amount, the Company&rsquo;s CEO purchased $250,000 of notes
and warrants in the offering.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in; background-color: white"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in; background-color: white"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">On
June 20, 2025, we entered into a securities purchase agreement with an accredited investor, for the sale by the Company to the investor,
in a private placement, of 21,924 shares of common stock and 1,158,953 pre-funded warrants to purchase shares of common stock, at a purchase
price of $3.60 per share or $3.599 per pre-funded warrant. The private placement closed on June 24, 2025.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in; background-color: white"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in; background-color: white"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
pre-funded warrants are immediately exercisable, at a nominal exercise price of $0.001, and may be exercised at any time until all of
the pre-funded warrants are exercised in full.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in; background-color: white"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in; background-color: white"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">WestPark
Capital, Inc. (&ldquo;WestPark&rdquo;) acted as the placement agent in connection with the private placement pursuant to an engagement
agreement between the Company and WestPark, as amended (as amended, the &ldquo;Engagement Agreement&rdquo;). Pursuant to the Engagement
Agreement, the Company paid WestPark a fee of 4% of the gross proceeds received by the Company in the private placement. The Company
also reimbursed certain expenses of WestPark.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">In
connection with the foregoing, we relied upon the exemption from registration provided by Section 4(a)(2) under the Securities Act of
1933, as amended, for transactions not involving a public offering.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in; background-color: white"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">On
November 3, 2025, we entered into a securities purchase agreement with an accredited investor, for the sale by the Company to the investor,
in a private placement, of a pre-funded warrant to purchase up to 625,156 shares of common stock for aggregate gross proceeds of approximately
$2.5 million. The private placement closed on November 4, 2025.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in; background-color: white"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in; background-color: white"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
pre-funded warrant is immediately exercisable, at a nominal exercise price of $0.001, and may be exercised at any time until the pre-funded
warrant is exercised in full.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in; background-color: white"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in; background-color: white"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">WestPark
acted as the placement agent in connection with the private placement pursuant to a placement agency agreement between the Company and
WestPark, as amended (as amended, the &ldquo;Placement Agency Agreement&rdquo;). Pursuant to the Placement Agency Agreement, the Company
paid WestPark a cash fee of 4% of the gross proceeds received by the Company in the private placement. The Company also reimbursed certain
expenses of WestPark.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">In
connection with the foregoing, we relied upon the exemption from registration provided by Section 4(a)(2) under the Securities Act of
1933, as amended, for transactions not involving a public offering.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item
16. Exhibits and Financial Statement Schedules.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>(a)
Exhibits</B><B>.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 0.65in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.1</FONT></TD>
    <TD STYLE="width: 0.15in">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex3-1.htm" STYLE="-sec-extract: exhibit">Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.1 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.2</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex3-2.htm" STYLE="-sec-extract: exhibit">Certificate of Amendment to Amended and Restated Certificate of Incorporation, effective March 30, 2022 (incorporated by reference to Exhibit 3.2 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.3</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex3-4.htm" STYLE="-sec-extract: exhibit">Amended and Restated Certificate of Designation for Series A Convertible Preferred Stock, effective April 6, 2022 (incorporated by reference to Exhibit 3.4 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.4</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222017616/ex3-5.htm" STYLE="-sec-extract: exhibit">Certificate of Amendment to Amended and Restated Certificate of Incorporation, effective June 22, 2022 (incorporated by reference to Exhibit 3.5 to the Registration Statement on Form S-1/A (File No. 333-265429) filed on June 23, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.5</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315224030491/ex3-1.htm" STYLE="-sec-extract: exhibit">Certificate of Amendment to Amended and Restated Certificate of Incorporation, effective August 13, 2024 (incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K filed on August 7, 2024).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.6</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225009106/ex3-6.htm" STYLE="-sec-extract: exhibit">Third Amended and Restated Bylaws (incorporated by reference to S-1/A filed March 5, 2025)</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.1</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex4-1.htm" STYLE="-sec-extract: exhibit">Form of Convertible Note, dated February 2022 (incorporated by reference to Exhibit 4.1 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.2</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222023497/ex4-2.htm" STYLE="-sec-extract: exhibit">Form of 10% Promissory Note, dated August 2022 (incorporated by reference to Exhibit 4.2 to the Registration Statement on Form S-1/A (File No. 333-265429) filed on August 18, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.3</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222023497/ex4-3.htm" STYLE="-sec-extract: exhibit">Form of Warrant, dated August 2022 (incorporated by reference to Exhibit 4.3 to the Registration Statement on Form S-1/A (File No. 333-265429) filed on August 18, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.4</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222023497/ex4-4.htm" STYLE="-sec-extract: exhibit">Form of Public Offering Warrant (incorporated by reference to Exhibit 4.4 to the Registration Statement on Form S-1/A (File No. 333-265429) filed on August 18, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.5</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222017616/ex4-2.htm" STYLE="-sec-extract: exhibit">Form of Underwriting Warrant issuable to Boustead Securities LLC (incorporated by reference to Exhibit 4.5 to the Registration Statement on Form S-1/A (File No. 333-265429) filed on August 18, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.6</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315224041443/ex10-3.htm" STYLE="-sec-extract: exhibit">Form of Common Warrants (incorporated by reference to Exhibit 10.3 to the Current Report on Form 8-K filed on October 17, 2024).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.7</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315224043249/ex4-1.htm" STYLE="-sec-extract: exhibit">Form of Common Warrant (incorporated by reference to Exhibit 4.1 to the Current Report on Form 8-K dated October 31, 2024).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.8</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315224043249/ex4-2.htm" STYLE="-sec-extract: exhibit">Form of Pre-Funded Warrant (incorporated by reference to Exhibit 4.2 to the Current Report on Form 8-K dated October 31, 2024).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.9</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225009106/ex4-9.htm" STYLE="-sec-extract: exhibit">Form of Pre-Funded Warrant (incorporated by reference to S-1/A filed March 5, 2025)</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.10</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000164117225016394/ex10-3.htm" STYLE="-sec-extract: exhibit">Form of Pre-Funded Warrant (incorporated by reference to 8-K filed June 25, 2025)</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.11</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225021256/ex4-1.htm" STYLE="-sec-extract: exhibit">Form of Pre-Funded Warrant (incorporated by reference to 8-K filed November 7, 2025)</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">5.1**</FONT> </TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225024089/ex5-1.htm"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Opinion of Sullivan &amp; Worcester LLP</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.1</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-1.htm" STYLE="-sec-extract: exhibit">Form of Subscription Agreement for Series A Convertible Preferred Stock (incorporated by reference to Exhibit 10.1 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.2</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-2.htm" STYLE="-sec-extract: exhibit">2018 Equity Incentive Plan (incorporated by reference to Exhibit 10.2 to the Registration Statement on Form S-1 (File No. 333- 265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.3</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-2.htm" STYLE="-sec-extract: exhibit">Employment Agreement, dated July 30, 2014, between Shuttle Pharmaceuticals Holdings, Inc. and Tyvin Rich (incorporated by reference to Exhibit 10.4 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.4</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222017616/ex10-5.htm" STYLE="-sec-extract: exhibit">SBIR Contract #HHSN261201400013C, dated September 19, 2014, between Shuttle Pharmaceuticals, LLC and National Institute of Health National Cancer Institute (incorporated by reference to Exhibit 10.5 to the Registration Statement on Form S-1 (File No. 333- 265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.5</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222017616/ex10-6.htm" STYLE="-sec-extract: exhibit">SBIR Contract #HHSN261201400013C Amendment of Solicitation/Modification of Contract, dated August 3, 2015, between Shuttle Pharmaceuticals, LLC and National Institute of Health National Cancer Institute (Radiosensitizer Option Phase II) (incorporated by reference to Exhibit 10.6 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.6</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222017616/ex10-7.htm" STYLE="-sec-extract: exhibit">SBIR Contract #HHSN261201600027C, dated September 19, 2016, between Shuttle Pharmaceuticals, LLC and National Institute of Health National Cancer Institute (incorporated by reference to Exhibit 10.7 to the Registration Statement on Form S-1 (File No. 333- 265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.7</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222017616/ex10-8.htm" STYLE="-sec-extract: exhibit">SBIR Contract #HHSN261600038C dated September 19, 2016 between Shuttle Pharmaceuticals, LLC. and National Institute of Health National Cancer Institute (incorporated by reference to Exhibit 10.8 to the Registration Statement on Form S-1 (File No. 333- 265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.8</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222017616/ex10-9.htm" STYLE="-sec-extract: exhibit">Material Transfer Agreement, dated April 25, 2017, between Shuttle Pharmaceuticals, Inc. and George Washington University (incorporated by reference to Exhibit 10.9 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.9</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-10.htm" STYLE="-sec-extract: exhibit">Employment Agreement, dated May 30, 2019, between Shuttle Pharmaceuticals Holdings, Inc. and Peter Dritschilo (incorporated by reference to Exhibit 10.10 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.10</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-11.htm" STYLE="-sec-extract: exhibit">Employment Agreement, dated May 30, 2019, between Shuttle Pharmaceuticals Holdings, Inc. and Mira Jung (incorporated by reference to Exhibit 10.11 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.11</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-14.htm" STYLE="-sec-extract: exhibit">Form of Letter Agreement with Director (incorporated by reference to Exhibit 10.14 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>

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<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 0.65in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.12</FONT></TD>
    <TD STYLE="width: 0.15in">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222017616/ex10-15.htm" STYLE="-sec-extract: exhibit">Subaward Agreement dated October 28, 2014 between Shuttle Pharmaceuticals, LLC and LifeSpan/Rhode Island Hospital (incorporated by reference to Exhibit 10.15 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.13</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222017616/ex10-16.htm" STYLE="-sec-extract: exhibit">Sublicense Agreement, dated February 15, 2019, between Shuttle Pharmaceuticals Inc. and Propagenix, Inc. (incorporated by reference to Exhibit 10.16 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.14</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222017616/ex10-17.htm" STYLE="-sec-extract: exhibit">SBIR Contract #HHSN261201800016C/75N91018C00016 Agreement between Shuttle Pharmaceuticals, LLC and National Institute of Health National Cancer Institute (incorporated by reference to Exhibit 10.17 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.15</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-18.htm" STYLE="-sec-extract: exhibit">Promissory Note, dated as of August 24, 2019, between Shuttle Pharmaceuticals Holdings, Inc. and Anatoly Dritschilo (incorporated by reference to Exhibit 10.18 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.16</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-19.htm" STYLE="-sec-extract: exhibit">SBIR Phase II Contract #75N9101C00031, dated September 6, 2019, between Shuttle Pharmaceuticals, Inc. and National Institute of Health National Cancer Institute (incorporated by reference to Exhibit 10.19 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.17</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-20.htm" STYLE="-sec-extract: exhibit">Director Offer Letter, dated December 2, 2020, between Chris H. Senanayake and Shuttle Pharmaceuticals Holdings, Inc. (incorporated by reference to Exhibit 10.20 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.18</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-21.htm" STYLE="-sec-extract: exhibit">Promissory Note, dated December 1, 2020, between Shuttle Pharmaceuticals Holdings, Inc. and Joy Dritschilo (incorporated by reference to Exhibit 10.21 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.19</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-22.htm" STYLE="-sec-extract: exhibit">Promissory Note, dated December 1, 2020, between Shuttle Pharmaceuticals Holdings, Inc. and Anatoly Dritschilo (incorporated by reference to Exhibit 10.22 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.20</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-23.htm" STYLE="-sec-extract: exhibit">Non-Disclosure, Evaluation and Option Agreement, dated May 30, 2019, between Shuttle Pharmaceuticals, Inc. and University of Virginia Licensing &amp; Ventures Group (incorporated by reference to Exhibit 10.23 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.21</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-24.htm" STYLE="-sec-extract: exhibit">First Amendment to Non-Disclosure, Evaluation and Option Agreement, dated November 30, 2019, between Shuttle Pharmaceutical, Inc. and University of Virginia Licensing &amp; Ventures Group (incorporated by reference to Exhibit 10.24 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.22</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-25.htm" STYLE="-sec-extract: exhibit">Form of Note and Warrant Subscription Agreement, dated December 28, 2021 (incorporated by reference to Exhibit 10.25 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.23</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-26.htm" STYLE="-sec-extract: exhibit">Form of Note, dated December 28, 2021 (incorporated by reference to Exhibit 10.26 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.24</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-27.htm" STYLE="-sec-extract: exhibit">Form of Common Stock Purchase Warrant, dated December 28, 2021 (incorporated by reference to Exhibit 10.27 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.25</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-28.htm" STYLE="-sec-extract: exhibit">Consulting Agreement, dated January 1, 2022, between Shuttle Pharmaceuticals Holdings, Inc. and Steven Bayern (incorporated by reference to Exhibit 10.28 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.26</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-29.htm" STYLE="-sec-extract: exhibit">Amendment to Promissory Note, dated January 25, 2022, between Shuttle Pharmaceuticals Holdings, Inc. and Joy Dritschilo (incorporated by reference to Exhibit 10.29 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.27</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-30.htm" STYLE="-sec-extract: exhibit">Amendment to Promissory Note, dated January 25, 2022, between Shuttle Pharmaceuticals Holdings, Inc. and Anatoly Dritschilo (incorporated by reference to Exhibit 10.30 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.28</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222015884/ex10-31.htm" STYLE="-sec-extract: exhibit">Form of Convertible Note Subscription Agreement and Investor Rights Agreement (incorporated by reference to Exhibit 10.31 to the Registration Statement on Form S-1 (File No. 333-265429) filed on June 3, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.29</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222023497/ex10-32.htm" STYLE="-sec-extract: exhibit">Amendment No. 1 to Promissory Note, dated July 29, 2022, between Shuttle Pharmaceuticals Holdings, Inc. and Joy Dritschilo (incorporated by reference to Exhibit 10.32 to the Registration Statement on Form S-1/A (File No. 333-265429) filed on August 18, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.30</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222023497/ex10-33.htm" STYLE="-sec-extract: exhibit">Amendment No. 2 to Promissory Note, dated July 29, 2022, between Shuttle Pharmaceuticals holdings, Inc. and Joy Dritschilo (incorporated by reference to Exhibit 10.33 to the Registration Statement on Form S-1/A (File No. 333-265429) filed on August 18, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.31</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222023497/ex10-34.htm" STYLE="-sec-extract: exhibit">Amendment No. 2 to Promissory Note, dated July 29, 2022, between Shuttle Pharmaceuticals Holdings, inc. and Anatoly Dritschilo (incorporated by reference to Exhibit 10.34 to the Registration Statement on Form S-1/A (File No. 333-265429) filed on August 18, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.32</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315222026195/ex10-1.htm" STYLE="-sec-extract: exhibit">Manufacturing Agreement, dated September 14, 2022, between Shuttle Pharmaceuticals, Inc. and TCG GreenChem, Inc. (incorporated by reference to Exhibit 10.1 to the Current report on Form 8-K filed September 19, 2022).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.33</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315223001308/ex10-1.htm" STYLE="-sec-extract: exhibit">Form of Securities Purchase Agreement, dated January 11, 2023, between Shuttle Pharmaceuticals Holdings, Inc. and the investors named therein (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed January 12, 2023).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.34</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315223001308/ex10-2.htm" STYLE="-sec-extract: exhibit">Form of Note, dated January 11, 2023 (incorporated by reference to Exhibit 10.2 to the Current Report on form 8-K filed January 12, 2023).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.35</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315223001308/ex10-3.htm" STYLE="-sec-extract: exhibit">Form of Warrant, dated January 11, 2023 (incorporated by reference to Exhibit 10.3 to the Current Report on form 8-K filed January 12, 2023).</A></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>

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<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.36</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315223001308/ex10-4.htm" STYLE="-sec-extract: exhibit">Form of Security Agreement, dated January 11, 2023, between Shuttle Pharmaceuticals Holdings, Inc., Shuttle Pharmaceuticals, Inc. and Alto Opportunity Master Fund, SPC &ndash; Segregated Portfolio B (incorporated by reference to Exhibit 10.4 to the Current Report on form 8-K filed January 12, 2023).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 0.65in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.37</FONT></TD>
    <TD STYLE="width: 0.15in">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315223001308/ex10-5.htm" STYLE="-sec-extract: exhibit">Form of Intellectual Property Security Agreement, dated January 11, 2023 (incorporated by reference to Exhibit 10.5 to the Current Report on form 8-K filed January 12, 2023).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.38</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315223001308/ex10-6.htm" STYLE="-sec-extract: exhibit">Form of Subsidiary Guaranty (incorporated by reference to Exhibit 10.6 to the Current Report on form 8-K filed January 12, 2023).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.39</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315223001308/ex10-7.htm" STYLE="-sec-extract: exhibit">Form of Registration Rights Agreement, dated January 11, 2023 (incorporated by reference to Exhibit 10.7 to the Current Report on form 8-K filed January 12, 2023).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.40</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315223005722/ex10-1.htm" STYLE="-sec-extract: exhibit">Form of Director Offer Letter (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed February 22, 2023).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.41</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315223007073/ex10-1.htm" STYLE="-sec-extract: exhibit">Proposal for Service Agreement, dated March 7, 2023, between Shuttle Pharmaceuticals, Inc. and University of Iowa Pharmaceuticals (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed March 9, 2023).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.42</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315223007686/ex10-44.htm" STYLE="-sec-extract: exhibit">Amended and Restated Insider Trading Policy, effective March 10, 2023 (incorporated by reference to Exhibit 10.44 to the Annual Report on Form 10-K filed March 15, 2023).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.43</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315223007686/ex10-45.htm" STYLE="-sec-extract: exhibit">Form of Executive Compensation Clawback Policy, effective March 10, 2023 (incorporated by reference to Exhibit 10.45 to the Annual Report on Form 10-K filed March 15, 2023).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.44</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315223007686/ex10-46.htm" STYLE="-sec-extract: exhibit">Letter Agreement, dated March 11, 2023, between Shuttle Pharmaceuticals Holdings, Inc. and Alto Opportunity Master Fund, SPC &ndash; Segregated Portfolio B, as Collateral Agent (incorporated by reference to Exhibit 10.46 to the Annual Report on Form 10-K filed March 15, 2023).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.45</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315223008489/ex10-1.htm" STYLE="-sec-extract: exhibit">Research Agreement, dated March 16, 2023, between Shuttle Pharmaceuticals, Inc. and Georgetown University (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on March 22, 2023).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.46</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315223008489/ex10-2.htm" STYLE="-sec-extract: exhibit">Material Transfer Agreement, dated March 21, 2023, between Shuttle Pharmaceuticals, Inc. and Georgetown University (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K filed on March 22, 2023).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.47</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315223016290/ex10-1.htm" STYLE="-sec-extract: exhibit">Amendment Agreement, dated May 10, 2023, by and between Shuttle Pharmaceuticals Holdings, Inc., Shuttle Pharmaceuticals, Inc. and Alto Opportunity Master Fund, SPC &ndash; Segregated Master Portfolio B. (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on May 11, 2023).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.48</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315223020084/ex10-1.htm" STYLE="-sec-extract: exhibit">Amendment No. 1 to the Amendment Agreement, dated June 4, 2023, by and between Shuttle Pharmaceuticals Holdings, Inc., Shuttle Pharmaceuticals, Inc. and Alto Opportunity Master Fund, SPC &ndash; Segregated Master Portfolio B. (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on June 5, 2023).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.49</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315223036358/ex10-1.htm" STYLE="-sec-extract: exhibit">Consulting Agreement, dated October 1, 2023, between Shuttle Pharmaceuticals Holdings, Inc. and Joseph Armstrong (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on October 5, 2023).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.50</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315223038736/ex10-1.htm" STYLE="-sec-extract: exhibit">License Agreement, dated October 24, 2023, by and between Shuttle Pharmaceuticals Holdings, Inc. and Georgetown University (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on October 30, 2023).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.51</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315224004927/ex10-1.htm" STYLE="-sec-extract: exhibit">Asset Purchase Agreement, dated January 30, 2024, by and between Shuttle Pharmaceuticals Holdings, Inc., Alan Kozikowski and Werner Tueckmantel (incorporated herein by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on February 5, 2024).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.52</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315224005970/ex10-1.htm" STYLE="-sec-extract: exhibit">Securities Purchase Agreement, dated February 7, 2024, between Shuttle Pharmaceuticals Holdings, Inc., Shuttle Diagnostics, Inc. and SRO LLC (incorporated herein by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on February 13, 2024).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.53</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315224005970/ex10-2.htm" STYLE="-sec-extract: exhibit">Placement Agent and Advisory Services Agreement, dated February 7, 2024, between Shuttle Pharmaceuticals Holdings, Inc. and Boustead Securities, LLC (incorporated herein by reference to Exhibit 10.2 to the Current Report on Form 8-K filed on February 13, 2024).</A></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 0.65in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.54</FONT></TD>
    <TD STYLE="width: 0.15in">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315224005970/ex10-3.htm" STYLE="-sec-extract: exhibit">Offering Deposit Account Agency Agreement, dated February 7, 2024, between Shuttle Pharmaceuticals Holdings, Inc., Boustead Securities, LLC and Sutter Securities Inc. (incorporated by reference to Exhibit 10.3 to the Current Report on Form 10-K filed on February 13, 2024).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.55</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315224024224/ex10-1.htm" STYLE="-sec-extract: exhibit">Employment Agreement, dated June 13, 2024, between Shuttle Pharmaceuticals Holdings, Inc. and Timothy J. Lorber (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on June 18, 2024).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.56</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315224030491/ex10-1.htm" STYLE="-sec-extract: exhibit">Amendment Agreement, dated August 6, 2024, between Shuttle Pharmaceuticals Holdings, Inc., Shuttle Pharmaceuticals, Inc. and Alto Opportunity Master Fund, SPC &ndash; Segregated Master Portfolio B (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on August 7, 2024).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.57+</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315224032218/ex10-1.htm" STYLE="-sec-extract: exhibit">Work Order, dated August 8, 2024, between Shuttle Pharmaceuticals, Inc. and Theradex Systems, Inc. (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on August 14, 2024).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.58</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315224032218/ex10-2.htm" STYLE="-sec-extract: exhibit">Master Services Agreement, dated November 1, 2018, between Shuttle Pharmaceuticals, Inc. and Theradex Systems Inc. (incorporated by reference to Exhibit 10.2 to the Current Report filed on August 14, 2024).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.59</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315224035667/ex10-1.htm" STYLE="-sec-extract: exhibit">Form of Promissory Note, dated September 4, 2024, between Shuttle Pharmaceuticals Holdings, Inc. and Anatoly Dritschilo (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on September 10, 2024).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.60</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315224041443/ex10-1.htm" STYLE="-sec-extract: exhibit">Form of Securities Purchase Agreement (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on October 17, 2024).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.61</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315224041443/ex10-2.htm" STYLE="-sec-extract: exhibit">Form of Senior Secured Convertible Notes (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K filed on October 17, 2024).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.62</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315224043249/ex1-1.htm" STYLE="-sec-extract: exhibit">Placement Agency Agreement, dated as of October 29, 2024, by and among Shuttle Pharmaceuticals Holdings, Inc. and A.G.P./Alliance Global Partners and Boustead Securities, LLC, as placement agents (incorporated by reference to Exhibit 1.1 to the Current Report on Form 8-K dated October 31, 2024).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.63</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315224050700/ex10-1.htm" STYLE="-sec-extract: exhibit">Sponsored Research Agreement, dated December 16, 2024, by and among Shuttle Pharmaceuticals Holdings, Inc., the Regents of the University of California and Dr. Robert Favell (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed December 19, 2024).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.64</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225003985/ex10-1.htm" STYLE="-sec-extract: exhibit">Change Order, dated January 23, 2025, between Shuttle Pharmaceutials, Inc. and Theradex Systems, Inc. (incorporated by reference to the Current Report on Form 8-K filed on January 28, 2025).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.65</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225008462/ex10-1.htm" STYLE="-sec-extract: exhibit">Amendment Agreement, dated February 26, 2025, between Shuttle Pharmaceuticals Holdings, Inc. and Alto Opportunity Master Fund, SPC &ndash; Segregated Master Portfolio B (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K filed February 27, 2025).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.66</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225008742/ex10-1.htm" STYLE="-sec-extract: exhibit">Revolving Loan Agreement, dated February 28, 2025, between Shuttle Pharmaceuticals Holdings, Inc. and Bowery Consulting Group Inc. (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed February 28, 2025).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.67</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225008742/ex10-2.htm" STYLE="-sec-extract: exhibit">Revolving Note, dated February 28, 2025, between Shuttle Pharmaceuticals Holdings, Inc. and Bowery Consulting Group Inc. (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K filed February 28, 2025).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.68</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225009922/ex10-1.htm" STYLE="-sec-extract: exhibit">Consulting Agreement, dated March 11, 2025 (incorporated by reference to 8-K filed March 12, 2025)</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.69</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225010211/ex1-1.htm" STYLE="-sec-extract: exhibit">Underwriting Agreement, dated March 12, 2025 (incorporated by reference to 8-K filed March 13, 2025)</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.70</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000164117225000595/ex1-1.htm" STYLE="-sec-extract: exhibit">Consulting Services Agreement, dated March 21, 2025 (incorporated by reference to 8-K filed March 25, 2025)</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.71</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000164117225002757/ex10-1.htm" STYLE="-sec-extract: exhibit">Consulting Agreement, dated April 3, 2025 (incorporated by reference to 8-K filed April 4, 2025)</A></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 0.65in"> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.72</FONT> </TD>
    <TD STYLE="width: 0.15in">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000164117225016394/ex10-1.htm" STYLE="-sec-extract: exhibit">Securities Purchase Agreement, dated June 20, 2025 (incorporated by reference to 8-K filed June 25, 2025)</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.73</FONT> </TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000164117225016394/ex10-2.htm" STYLE="-sec-extract: exhibit">Registration Rights Agreement, dated June 20, 2025 (incorporated by reference to 8-K filed June 25, 2025)</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.74</FONT> </TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225014489/ex10-1.htm" STYLE="-sec-extract: exhibit">Consulting Agreement, dated September 15, 2025 (incorporated by reference to 8-K filed September 22, 2025)</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.75</FONT> </TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225018788/ex10-1.htm" STYLE="-sec-extract: exhibit">Binding Term Sheet between the Company and Molecule (incorporated by reference to 8-K filed October 21, 2025)</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.76</FONT> </TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225021256/ex10-1.htm" STYLE="-sec-extract: exhibit">Form of Securities Purchase Agreement, dated November 3, 2025 (incorporated by reference to 8-K filed November 7, 2025)</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.77</FONT> </TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225021256/ex10-2.htm" STYLE="-sec-extract: exhibit">Placement Agency Agreement, dated November 3, 2025 (incorporated by reference to 8-K filed November 7, 2025)</A></FONT></TD></TR>

<TR STYLE="vertical-align: top">
    <TD> <FONT STYLE="font-size: 10pt">10.78</FONT> </TD>
    <TD> &nbsp; </TD>
    <TD STYLE="text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225024618/ex10-1.htm"> <FONT STYLE="font-size: 10pt">Release and Settlement Agreement, by and between Shuttle Pharmaceuticals Holding, Inc. and Theradex Systems, Inc., dated November 20, 2025 (incorporated by reference to 8-K filed November 21, 2025).</FONT> </A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD> <FONT STYLE="font-size: 10pt">10.79</FONT> </TD>
    <TD> &nbsp; </TD>
    <TD STYLE="text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225025082/ex10-1.htm"> <FONT STYLE="font-size: 10pt">Asset Purchase Agreement, dated as of November 20, 2025, by and among Shuttle Pharmaceuticals Holdings, Inc.,1563868 B.C. Ltd., 1542770 BC Ltd., and Zhitian (Andy) Zhang (incorporated by reference to 8-K filed November 26, 2025).</FONT> </A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD> <FONT STYLE="font-size: 10pt">10.80</FONT> </TD>
    <TD> &nbsp; </TD>
    <TD STYLE="text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225025430/ex10-1.htm"> <FONT STYLE="font-size: 10pt">Separation Agreement and Mutual Release by and between Shuttle Pharmaceuticals Holdings, Inc. and Timothy Lorber, dated November 21, 2025 (incorporated by reference to 8-K filed November 28, 2025).</FONT> </A></TD></TR>

<TR STYLE="vertical-align: top">
    <TD STYLE="width: 0.65in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">21</FONT></TD>
    <TD STYLE="width: 0.15in">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315224010822/ex21.htm" STYLE="-sec-extract: exhibit">List of Subsidiaries (incorporated by reference to Exhibit 21 to the Annual Report on Form 10-K filed on March 21, 2024).</A></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">23.1*</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><A HREF="ex23-1.htm"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Consent of Forvis Mazars, LLP</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">23.2**</FONT> </TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225024089/ex5-1.htm"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Consent of Sullivan &amp; Worcester LLP (included in Exhibit 5.1)</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">24**</FONT> </TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225024089/forms-1.htm#SSS_001"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Power of Attorney (included in the signature page to this registration statement).</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">107**</FONT> </TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/1757499/000149315225024089/ex107.htm"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Filing Fee Table</FONT></A></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">+Certain
portions of this exhibit have been redacted in accordance with Item 601(b)(10)(iv) because such information (i) is deemed not material
and (ii) is of the type of information that the Company normally treats as private or confidential.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">*
Filed herewith</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">**
Previously filed&nbsp;</FONT> </P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>(b)
Financial statement schedules</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Schedules
not listed above have been omitted because the information required to be set forth therein is not applicable or is shown in the financial
statements or notes thereto.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item
17. Undertakings</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
undersigned registrant hereby undertakes:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(1)
To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 1in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(i)
To include any prospectus required by Section 10(a)(3) of the Securities Act;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 1in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(ii)
To reflect in the prospectus any facts or events arising after the effective date of the Registration Statement (or the most recent post-effective
amendment thereof) which individually or in the aggregate, represent a fundamental change in the information set forth in the Registration
Statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities
offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range
may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume
and price represent no more than a 20 percent change in the maximum aggregate offering price set forth in the &ldquo;Calculation of Registration
Fee&rdquo; table in the effective Registration Statement; and</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 1in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(iii)
To include any material information with respect to the plan of distribution not previously disclosed in the Registration Statement or
any material change to such information in the Registration Statement;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><I>provided,
however</I>, that paragraphs (1)(i), (1)(ii) and (1)(iii) of this section do not apply if the information required to be included in
a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the Registrant pursuant
to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in the Registration Statement,
or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(2)
That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be
a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed
to be the initial <I>bona fide</I> offering thereof.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(3)
To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the
termination of the offering.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(4)
That, for the purpose of determining liability under the Securities Act to any purchaser:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 1in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(A)
Each prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the
date the filed prospectus was deemed part of and included in the registration statement; and</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 1in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(B)
Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5) or (b)(7) as part of a registration statement in reliance on
Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii) or (x) for the purpose of providing the information required
by Section 10(a) of the Securities Act shall be deemed to be part of and included in the registration statement as of the earlier of
the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering
described in prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter,
such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement
to which the prospectus relates, and the offering of such securities at that time shall be deemed to be the initial bona fide offering
thereof. <I>Provided, however</I>, that no statement made in a registration statement or prospectus that is part of the registration
statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is
part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or
modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in
any such document immediately prior to such effective date; and</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(5)
The undersigned hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the registrant&rsquo;s
annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act of 1934 that is incorporated by reference in the Registration
Statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(6)
Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers, and controlling
persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that, in the opinion of
the Securities and Exchange Commission, such indemnification is against public policy as expressed in the Securities Act and is, therefore,
unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses
incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding)
is asserted by such director, officer, or controlling person in connection with the securities being registered, the registrant will,
unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction
the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the
final adjudication of such issue.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>SIGNATURES</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pursuant
to the requirements of the Securities Act of 1933, the registrant has duly caused this registration statement to be signed on its behalf
by the undersigned, thereunto duly authorized, in the City of Gaithersburg, State of Maryland, on December 11, 2025.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <TR STYLE="font: 10pt Times New Roman, Times, Serif">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD COLSPAN="2" STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Shuttle
    Pharmaceuticals Holdings Inc.</B></FONT></TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD COLSPAN="2" STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; width: 5%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><I>By:
    </I></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; width: 45%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><I>/s/
    Christopher Cooper</I></FONT></TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Name:
    </FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Christopher
    Cooper</FONT></TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Title:</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Interim
    Chief Executive Officer</FONT></TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Principal
    Executive Officer)</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pursuant
to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities
and on the dates indicated.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"></FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font-size: 10pt">
  <TR>
    <TD STYLE="vertical-align: bottom; width: 24%; border-bottom: black 1pt solid"><B>SIGNATURE</B></TD>
    <TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; width: 54%; border-bottom: black 1pt solid"><B>TITLE</B></TD>
    <TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; width: 18%; border-bottom: black 1pt solid"><B>DATE</B></TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: black 1pt solid"><I>/s/ Christopher Cooper</I></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">Interim Chief Executive Officer (Principal Executive Officer, Principal Financial Officer and
    Principal Accounting Officer) </TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom"> December 11, 2025</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom">Christopher Cooper</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: black 1pt solid"><I>/s/ * </I></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">Director</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: bottom"> December 11, 2025</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom">George Scorsis</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: black 1pt solid"><I>/s/ * </I></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: top">Director</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: top"> December 11, 2025</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom">Adam Chambers</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: black 1pt solid"><I>/s/ * </I></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: top">Director</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: top"> December 11, 2025</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom">Angel Liriano</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: black 1pt solid"><I>/s/ * </I></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: top">Director</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: top"> December 11, 2025</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom">Oleh Nabyt</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; border-bottom: black 1pt solid"><I>/s/ * </I></TD>
    <TD>&nbsp;</TD>
    <TD>Director</TD>
    <TD>&nbsp;</TD>
    <TD> December 11, 2025</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom">Sachin Pathigoda</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

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    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"> * By: </P></TD>
    <TD STYLE="width: 47%; border-bottom: black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"> <I>/s/ Christopher Cooper</I> </P></TD>
    <TD STYLE="width: 50%; font-size: 10pt"> &nbsp; </TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; font-size: 10pt"> &nbsp; </TD>
    <TD STYLE="vertical-align: top; font-size: 10pt"> <FONT STYLE="font-size: 10pt">Christopher Cooper, as attorney-in-fact</FONT> </TD>
    <TD> &nbsp; </TD></TR>
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<TYPE>EX-23.1
<SEQUENCE>2
<FILENAME>ex23-1.htm
<DESCRIPTION>EX-23.1
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: right"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Exhibit
23.1</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Consent
of Independent Registered Public Accounting Firm</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
consent to the incorporation by reference in this Registration Statement on Form S-1 of Shuttle Pharmaceuticals Holdings, Inc. (the &ldquo;Company&rdquo;)
of our report dated February 26, 2025, with respect to the consolidated financial statements of the Company, included in the Annual Report
on Form 10-K for the year ended December 31, 2024. Our report contains an explanatory paragraph describing the conditions that raise
substantial doubt about the Company&rsquo;s ability to continue as a going concern in Note 1 to the consolidated financial statements.
We also consent to the reference to our firm under the caption &ldquo;Experts&rdquo; in the Registration Statement.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

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<TD STYLE="width: 50%; text-align: left"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ Forvis Mazars,
LLP</FONT></TD><TD STYLE="text-align: justify; width: 50%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
</TR><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="text-align: right"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD></TR>
     <TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="text-align: left"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Atlanta, Georgia</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD></TR>
     <TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="text-align: left"> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>December 11,</B></FONT> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>
2025</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></TD></TR>
     </TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

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