<SEC-DOCUMENT>0000905718-21-000395.txt : 20210308
<SEC-HEADER>0000905718-21-000395.hdr.sgml : 20210308
<ACCEPTANCE-DATETIME>20210308083007
ACCESSION NUMBER:		0000905718-21-000395
CONFORMED SUBMISSION TYPE:	SC 13D
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20210308
DATE AS OF CHANGE:		20210308
GROUP MEMBERS:		ABINGWORTH BIOVENTURES 8, LP

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Adicet Bio, Inc.
		CENTRAL INDEX KEY:			0001720580
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				813305277
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-90283
		FILM NUMBER:		21720703

	BUSINESS ADDRESS:	
		STREET 1:		500 BOYLSTON STREET
		STREET 2:		12TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		617-482-2333

	MAIL ADDRESS:	
		STREET 1:		500 BOYLSTON STREET
		STREET 2:		12TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	resTORbio, Inc.
		DATE OF NAME CHANGE:	20171024

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Abingworth LLP
		CENTRAL INDEX KEY:			0001397144
		IRS NUMBER:				980518585
		STATE OF INCORPORATION:			X0
		FISCAL YEAR END:			0630

	FILING VALUES:
		FORM TYPE:		SC 13D

	BUSINESS ADDRESS:	
		STREET 1:		38 JERMYN STREET
		CITY:			LONDON
		STATE:			X0
		ZIP:			SW1Y 6DN
		BUSINESS PHONE:		44 (0)20 7534 1500

	MAIL ADDRESS:	
		STREET 1:		38 JERMYN STREET
		CITY:			LONDON
		STATE:			X0
		ZIP:			SW1Y 6DN
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D
<SEQUENCE>1
<FILENAME>adicetbio_13dmar22021.htm
<DESCRIPTION>SC 13D
<TEXT>
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<P STYLE="margin: 0"></P>

<P STYLE="font: 14pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>UNITED STATES</B></P>

<P STYLE="font: 14pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION</B></P>

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

<P STYLE="font: 14pt/18pt Times New Roman, Times, Serif; margin: 6pt 0 0; text-align: center"><B>SCHEDULE 13D</B></P>

<P STYLE="font: 12pt/18pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Under the Securities Exchange Act of
1934<BR>
  </B></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 100%; border-bottom: Black 1pt solid; font: 12pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-size: 12pt">Adicet Bio, Inc.</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font: 12pt Times New Roman, Times, Serif; padding-bottom: 12pt; text-align: center">(Name of Issuer)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid; font: 12pt Times New Roman, Times, Serif; text-align: center"><P STYLE="margin-top: 0; margin-bottom: 0"></P>
                                                                                <P STYLE="margin-top: 0; margin-bottom: 0">Common Stock,
par value $0.0001 per share</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font: 12pt Times New Roman, Times, Serif; padding-bottom: 12pt; text-align: center">(Title of Class of Securities)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid; font: 12pt Times New Roman, Times, Serif; text-align: center">007002108</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font: 12pt Times New Roman, Times, Serif; text-align: center">(CUSIP Number)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>
        <P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid">
        <P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center">John Heard</P>
        <P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center">  Abingworth LLP</P>
        <P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center"></P>
        <P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center">Princes House</P>
        <P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center">38 Jermyn Street</P>
        <P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center">  London, England SW1Y 6DN</P>
        <P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center"> +44 20 7534 1500</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font: 12pt Times New Roman, Times, Serif; text-align: center">(Name, Address and Telephone Number of Person <BR>
Authorized to Receive Notices and Communications)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font: 12pt Times New Roman, Times, Serif; text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid; font: 12pt Times New Roman, Times, Serif; text-align: center"> March 2,
    2021</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font: 12pt Times New Roman, Times, Serif; text-align: center">(Date of Event Which Requires Filing of this Statement)</TD></TR>
</TABLE>
<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 12pt/12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 12pt/12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">If the filing person has previously filed
a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because
of &sect;&sect;240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. [X]</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><B>Note </B>Schedules filed in paper format
shall include a signed original and five copies of the schedule, including all exhibits. See &sect;240.13d-7 for other parties
to whom copies are to be sent.</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">*The remainder of this cover page shall be
filled out for a reporting person&rsquo;s initial filing on this form with respect to the subject class of securities, and for
any subsequent amendment containing information which would alter disclosures provided in a prior cover page.</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify"></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The information required on the remainder
of this cover page shall not be deemed to be &ldquo;filed&rdquo; for the purpose of Section 18 of the Securities Exchange Act
of 1934 (&ldquo;Act&rdquo;) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other
provisions of the Act (however, see the Notes).&nbsp;</P>


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<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 12pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD COLSPAN="8" STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 6pt; padding-left: 5.75pt">CUSIP No.&nbsp;&nbsp;&nbsp;67022C106</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="padding-top: 6pt; padding-bottom: 6pt">1.</TD>
    <TD COLSPAN="6" STYLE="padding-right: 5.75pt; padding-left: 5.75pt">
        <P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 6pt 0">Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only):</P>
        <P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 6pt 0 0"> Abingworth LLP</P>
        <P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 6pt 0 0">98-0518585</P>
        <P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-right: 5.75pt">2.</TD>
    <TD COLSPAN="3" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-right: 5.75pt; padding-left: 5.75pt">Check the
    Appropriate Box if a Member of a Group (See Instructions):</TD>
    <TD STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-right: 5.75pt; padding-left: 5.75pt">(a)&nbsp;&nbsp;&nbsp;[&nbsp;&nbsp;&nbsp;&nbsp;]</TD>
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-right: 5.75pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="padding-right: 5.75pt; padding-bottom: 6pt; padding-left: 5.75pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 6pt; padding-left: 5.75pt">(b)&nbsp;&nbsp;&nbsp;[&nbsp;&nbsp;&nbsp;&nbsp;]</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.75pt; padding-bottom: 6pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top; background-color: #D9D9D9">
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">3.</TD>
    <TD COLSPAN="6" STYLE="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">SEC USE ONLY</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="padding-top: 6pt; padding-bottom: 6pt">4.</TD>
    <TD COLSPAN="6" STYLE="padding-top: 6pt; padding-bottom: 6pt">Source of Funds (See Instructions): &nbsp;&nbsp;WC (See Item 3)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">5.</TD>
    <TD COLSPAN="6" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d) or 2(e):&nbsp;&nbsp;&nbsp;[&nbsp;&nbsp;&nbsp;&nbsp;]</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">6.</TD>
    <TD COLSPAN="6" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">Citizenship or Place of Organization:&nbsp;&nbsp;&nbsp;&nbsp;England</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="8" STYLE="border-top: Black 1pt solid; padding-right: 5.75pt; padding-left: 5.75pt; line-height: 8pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">Number of</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">7.&#9;Sole Voting Power:</TD>
    <TD COLSPAN="3" STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt; text-align: right">0&nbsp;&nbsp;</TD>
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">Shares Beneficially</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">8.&#9;Shared Voting Power:</TD>
    <TD COLSPAN="3" STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt; text-align: right">1,640,721*</TD>
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">Owned by</TD>
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">Each Reporting</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">9.&#9;Sole Dispositive Power:</TD>
    <TD COLSPAN="3" STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt; text-align: right">0&nbsp;&nbsp;</TD>
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">Person with</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">10.&#9;Shared Dispositive Power:</TD>
    <TD COLSPAN="3" STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt; text-align: right">1,640,721*</TD>
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="3" STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-left: 5.75pt; line-height: 8pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-left: 5.75pt; line-height: 8pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-left: 5.75pt; text-align: right; line-height: 8pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-left: 5.75pt; line-height: 8pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="border-bottom: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">11.</TD>
    <TD COLSPAN="2" STYLE="border-bottom: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">Aggregate Amount Beneficially Owned by Each Reporting Person:</TD>
    <TD COLSPAN="3" STYLE="border-bottom: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt; text-align: right">1,640,721*&nbsp;&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 6pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="padding-top: 6pt; padding-bottom: 6pt">12.</TD>
    <TD COLSPAN="6" STYLE="padding-top: 6pt; padding-bottom: 6pt">Check  if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions):&nbsp;&nbsp;&nbsp;[&nbsp;&nbsp;&nbsp;&nbsp;]</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">13.</TD>
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">Percent of Class Represented by Amount in Row (11):&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.2%*</TD>
    <TD COLSPAN="3" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt; text-align: right">&nbsp;</TD>
    <TD STYLE="border-top: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 6pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">14.</TD>
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">Type of Reporting Person (See Instructions):&nbsp;&nbsp;&nbsp;PN</TD>
    <TD COLSPAN="3" STYLE="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt; text-align: right">&nbsp;</TD>
    <TD STYLE="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 6pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR>
    <TD STYLE="width: 4%">&nbsp;</TD>
    <TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 29%">&nbsp;</TD>
    <TD STYLE="width: 46%">&nbsp;</TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 14%">&nbsp;</TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 2%">&nbsp;</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">*As of March 2, 2021 (the
&#8220;<U>Event Date</U>&#8221;), Abingworth LLP (&#8220;<U>Abingworth</U>&#8221;) may be deemed to beneficially own an aggregate
of 1,640,721 shares of common stock, par value $0.0001 per share (the &#8220;<U>Common Stock</U>&#8221;), of Adicet Bio, Inc. (the
&#8220;<U>Issuer</U>&#8221;) held by Abingworth Bioventures 8 LP (&#8220;ABV 8&#8221;). Abingworth Bioventures 8 GP LP (&#8220;<U>Abingworth
GP</U>&#8221;) serves as the general partner of ABV 8. Abingworth General Partner 8 LLP, serves as the general partner of Abingworth
GP. ABV 8 (acting by its general partner Abingworth GP, acting by its general partner Abingworth General Partner 8 LLP) has delegated
to Abingworth, all investment and dispositive power over the securities held by ABV 8.&nbsp; Abingworth holds the reported securities
indirectly through ABV 8.&nbsp; Based on the information from the Issuer and other public information, there were 31,318,990 shares
of Common Stock outstanding as of the Event Date, thus, as of the Event Date, for purposes of Rule 13d-3 under the Securities Exchange
Act of 1934, as amended, Abingworth may be deemed to beneficially own 5.2% of the Common Stock deemed issued and outstanding.</P>

<P STYLE="font: 11pt/14pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

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

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


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<P STYLE="font: 10pt/115% Times New Roman, Times, Serif; margin: 0 0 10pt">&nbsp;&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 12pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD COLSPAN="8" STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 6pt; padding-left: 5.75pt">CUSIP No.&nbsp;&nbsp;&nbsp;67022C106</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="padding-top: 6pt; padding-bottom: 6pt">1.</TD>
    <TD COLSPAN="6" STYLE="padding-right: 5.75pt; padding-left: 5.75pt">
        <P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 6pt 0">Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only):</P>
        <P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 6pt 0 0"> Abingworth Bioventures 8, LP</P>
        <P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-right: 5.75pt">2.</TD>
    <TD COLSPAN="3" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-right: 5.75pt; padding-left: 5.75pt">Check the
    Appropriate Box if a Member of a Group (See Instructions):</TD>
    <TD STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-right: 5.75pt; padding-left: 5.75pt">(a)&nbsp;&nbsp;&nbsp;[&nbsp;&nbsp;&nbsp;&nbsp;]</TD>
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-right: 5.75pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="padding-right: 5.75pt; padding-bottom: 6pt; padding-left: 5.75pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 6pt; padding-left: 5.75pt">(b)&nbsp;&nbsp;&nbsp;[&nbsp;&nbsp;&nbsp;&nbsp;]</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.75pt; padding-bottom: 6pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top; background-color: #D9D9D9">
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">3.</TD>
    <TD COLSPAN="6" STYLE="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">SEC USE ONLY</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="padding-top: 6pt; padding-bottom: 6pt">4.</TD>
    <TD COLSPAN="6" STYLE="padding-top: 6pt; padding-bottom: 6pt">Source of Funds (See Instructions): &nbsp;&nbsp;WC (See Item 3)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">5.</TD>
    <TD COLSPAN="6" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d) or 2(e):&nbsp;&nbsp;&nbsp;[&nbsp;&nbsp;&nbsp;&nbsp;]</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">6.</TD>
    <TD COLSPAN="6" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">Citizenship or Place of Organization:&nbsp;&nbsp;&nbsp;&nbsp;England</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="8" STYLE="border-top: Black 1pt solid; padding-right: 5.75pt; padding-left: 5.75pt; line-height: 8pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">Number of</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">7.&#9;Sole Voting Power:</TD>
    <TD COLSPAN="3" STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt; text-align: right">0&nbsp;&nbsp;</TD>
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">Shares Beneficially</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">8.&#9;Shared Voting Power:</TD>
    <TD COLSPAN="3" STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt; text-align: right">1,640,721*</TD>
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">Owned by</TD>
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">Each Reporting</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">9.&#9;Sole Dispositive Power:</TD>
    <TD COLSPAN="3" STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt; text-align: right">0&nbsp;&nbsp;</TD>
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">Person with</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">10.&#9;Shared Dispositive Power:</TD>
    <TD COLSPAN="3" STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt; text-align: right">1,640,721*</TD>
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="3" STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-left: 5.75pt; line-height: 8pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-left: 5.75pt; line-height: 8pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-left: 5.75pt; text-align: right; line-height: 8pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-left: 5.75pt; line-height: 8pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="border-bottom: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">11.</TD>
    <TD COLSPAN="2" STYLE="border-bottom: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">Aggregate Amount Beneficially Owned by Each Reporting Person:</TD>
    <TD COLSPAN="3" STYLE="border-bottom: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt; text-align: right">1,640,721*&nbsp;&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 6pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="padding-top: 6pt; padding-bottom: 6pt">12.</TD>
    <TD COLSPAN="6" STYLE="padding-top: 6pt; padding-bottom: 6pt">Check  if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions):&nbsp;&nbsp;&nbsp;[&nbsp;&nbsp;&nbsp;&nbsp;]</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">13.</TD>
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">Percent of Class Represented by Amount in Row (11):&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.2%*</TD>
    <TD COLSPAN="3" STYLE="border-top: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt; text-align: right">&nbsp;</TD>
    <TD STYLE="border-top: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 6pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">14.</TD>
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt">Type of Reporting Person (See Instructions):&nbsp;&nbsp;&nbsp;PN</TD>
    <TD COLSPAN="3" STYLE="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt; text-align: right">&nbsp;</TD>
    <TD STYLE="border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.75pt; padding-bottom: 6pt; padding-left: 5.75pt">&nbsp;</TD></TR>
<TR>
    <TD STYLE="width: 4%">&nbsp;</TD>
    <TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 29%">&nbsp;</TD>
    <TD STYLE="width: 46%">&nbsp;</TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 14%">&nbsp;</TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 2%">&nbsp;</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">*Consists of 1,640,721 shares of Common
Stock held directly by ABV 8. As of the Event Date, for purposes of Rule 13d-3 under the Securities Exchange Act of 1934, as amended,
ABV 8 may be deemed to beneficially own 5.2% of the Common Stock deemed issued and outstanding.</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify">The foregoing beneficial ownership percentage
is based upon 31,318,990 shares of Common Stock issued and outstanding as of the Event Date based on information received from
the Issuer and other public information.</P>

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

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

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

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

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


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<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top"><TD STYLE="width: 1in"> Item 1.</TD><TD><U>Security and Issuer</U></TD></TR></TABLE>


<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">This Schedule 13D (the &#8220;<U>Schedule
13D</U>&#8221;) relates to shares of common stock, par value $0.0001 per share (the &#8220;<U>Common Stock</U>&#8221;), of Adicet
Bio, Inc. (the &#8220;<U>Issuer</U>&#8221;). The Issuer&#8217;s principal executive offices are located at 500 Boylston Street,
12<SUP>th</SUP> Floor, Boston, MA 02116.</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 1in">Item 2.</TD><TD><U>Identity and Background</U></TD></TR></TABLE>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in"></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">This statement is being filed
on behalf of Abingworth Bioventures 8, LP (&#8220;<U>ABV 8</U>&#8221;), and Abingworth LLP (&#8220;<U>Abingworth</U>&#8221; together
with ABV 8, the &#8220;<U>Reporting Persons</U>&#8221;). Abingworth is the investment manager of ABV 8.</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">Abingworth Bioventures
8 GP LP, a Scottish limited partnership, serves as the general partner of ABV 8.&nbsp; Abingworth General Partner 8 LLP, an
English limited liability partnership (together with Abingworth Bioventures 8 GP LP, the &#8220;<U>General
Partners</U>&#8221;), serves as the general partner of Abingworth Bioventures 8 GP LP.&nbsp; ABV 8 (acting by its general
partner Abingworth Bioventures 8 GP LP, acting by its general partner Abingworth General Partner 8 LLP) has delegated to
Abingworth all investment and dispositive power over the securities held by ABV 8.&nbsp; An investment committee of
Abingworth, currently comprised of Andrew Sinclair, Timothy Haines, Kurt von Emster, Bali Muralidhar, Brian Gallagher and
Genghis Lloyd-Harris (collectively the &#8220;<U>Investment Committee</U>&#8221;), approves investment and voting decisions
by a specified majority vote, and no individual member has the sole control or voting power over the securities held by ABV
8. Each of Abingworth, Abingworth Bioventures 8 GP LP, Abingworth General Partner 8 LLP, and each member of the Investment
Committee disclaims beneficial ownership of the common stock held by ABV 8.</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">The address of the principal
business office of each of the Reporting Persons is c/o Abingworth LLP, Princes House, 38 Jermyn Street, London, England SW1Y 6DN.</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">The principal business of
ABV 8 is to invest in and assist growth-oriented businesses in the life science and biomedical industries. The principal business
of Abingworth is to serve as the investment manager to certain investment funds, including ABV 8.</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">None of the Reporting Persons,
the General Partners or any of their respective executive officers has, during the last five (5) years, been convicted in a criminal
proceeding.</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">None of the Reporting Persons,
the General Partners or any of their executive officers has, during the last five years, been a party to a civil proceeding of
a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment,
decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities
laws or finding any violation with respect to such laws.</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">ABV 8 is a limited partnership
organized under the laws of England. Abingworth is a limited liability partnership organized under the laws of England.</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in"></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 1in">Item 3.</TD><TD><U>Source and Amount of Funds or Other Consideration</U></TD></TR></TABLE>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">On February 12, 2021,
ABV 8 purchased 1,640,721 shares of Common Stock in a registered public offering of the Issuer. ABV 8 purchased the Common
Stock with its investment capital for an aggregate purchase price of approximately $21,329,373, which represents a per share
purchase price of $13.00.</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">&nbsp;</P>



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    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: center; width: 100%">&nbsp;</TD></TR></TABLE></DIV>
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<P STYLE="font: 12pt Times New Roman, Times, Serif; margin-top: 0; margin-right: 0; margin-left: 0; text-align: justify"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top"><TD STYLE="width: 1in">Item 4.</TD><TD><U>Purpose of Transaction</U></TD></TR></TABLE>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">The Reporting Persons acquired
the securities reported herein for investment in the ordinary course of business because of their belief that the Issuer represents
an attractive investment based on the Issuer&#8217;s business prospects and strategy. The Reporting Persons reserve the right to
acquire, or cause to be acquired, additional securities of the Issuer, to dispose of, or cause to be disposed of, such securities
at any time or to formulate other purposes, plans or proposals regarding the Issuer or any of its securities, to the extent deemed
advisable in light of general investment and trading policies of the Reporting Persons, market conditions or other factors.</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">Dr. Andrew Sinclair is a
Partner and Portfolio Manager of Abingworth and was appointed to the Board of Directors (the &#8220;<U>Board</U>&#8221;) of the
Issuer on March 2, 2021 (the &#8220;<U>Event Date</U>&#8221;).</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">Except as set forth herein,
the Reporting Persons do not have any plan or proposal that would relate to, or result in, any of the matters set forth under subsections
(a) through (j) of Item 4 of Schedule 13D.</P>


<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in"></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in"></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 1in">Item 5.</TD><TD><U>Interest in Securities of the Issuer</U></TD></TR></TABLE>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">Based on the information
from the Issuer and other public information, there were 31,318,990 shares of Common Stock outstanding as of the Event Date. Abingworth
may be deemed to beneficially own an aggregate of 1,640,721 shares of Common Stock of the Issuer. The number of shares of Common
Stock reported above consists of 1,640,721 shares of Common Stock held by ABV 8. Abingworth, as the investment manager of ABV 8,
may be deemed to beneficially own the 1,640,721 shares of Common Stock held by ABV 8. Thus, as of the Event Date, for purposes
of Rule 13d-3 under the Securities Exchange Act of 1934, as amended, Abingworth may be deemed to beneficially own 5.2% of the shares
of Common Stock deemed issued and outstanding. Ownership reported herein excludes options to purchase up to 28,828 shares of Common
Stock (the &#8220;<U>Options</U>&#8221;) issued to Dr. Sinclair pursuant to his Board appointment. The Options are exercisable
for ten (10) years at an exercise price of $15.75 per share. 33% of the shares of Common Stock shall become exercisable on March
2, 2022, and the remaining 67% of the shares of Common Stock shall vest in twenty-four (24) equal monthly installments thereafter.</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">Except as described herein,
during the past sixty (60) days on or prior to the Event Date, and from the Event Date to the date of filing of this report, there
were no other purchases or sales of common stock, or securities convertible into or exchangeable for common stock, by the Reporting
Persons or any person or entity for which the Reporting Persons possess voting or dispositive control over the securities thereof.</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in"></P>


<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in"></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 1in">Item 6.</TD><TD STYLE="text-align: justify; padding-right: 0.7in"><U>Contracts, Arrangements, Understandings or Relationships With Respect
to Securities of the Issuer</U></TD></TR></TABLE>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in">Except as otherwise set forth
in this Schedule 13D, there are no contracts, arrangements, understandings or similar relationships existing with respect to the
securities of the Issuer and any of the Reporting Persons.</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 1in">Item 7.</TD><TD STYLE="text-align: justify"><U>Material to be Filed as Exhibits</U></TD></TR></TABLE>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-align: justify; text-indent: 0.5in">The following
exhibit is incorporated into this Schedule 13D:&nbsp;&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0 0 12pt; text-align: justify; text-indent: 1in"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 13%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="width: 17%; padding-right: 5.4pt; padding-left: 5.4pt">
        <P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">Exhibit 1</P>
        <P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P></TD>
    <TD STYLE="width: 70%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: justify">Joint Filing Agreement, dated March 8, 2021, signed by each of the Reporting Persons in order to confirm that this Schedule 13D (and
any amendments hereto) are being filed on behalf of each of the Reporting Persons.</TD></TR>
</TABLE>
<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

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<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify"></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt/115% Times New Roman, Times, Serif; margin: 0 0 10pt; text-align: center"><B><U>Signature</U></B></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 0 12pt; text-align: justify; text-indent: 0.5in">After reasonable
inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete
and correct.</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0">Dated: March 8, 2021&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><B>ABINGWORTH BIOVENTURES 8, LP</B></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 23%; padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="width: 21%; padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="width: 5%; padding-right: 5.4pt; padding-left: 5.4pt">By: </TD>
    <TD STYLE="width: 49%; padding-right: 5.4pt; padding-left: 5.4pt">Abingworth LLP, its Manager</TD>
    <TD STYLE="width: 2%; padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">By:</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt">/s/ John Heard</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">Name:&nbsp;&nbsp;John Heard</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">Title:&nbsp;&nbsp;Authorized Signatory</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
</TABLE>
<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><B>ABINGWORTH LLP</B></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; width: 23%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; width: 21%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; width: 5%">By:</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; width: 49%">/s/ John Heard</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; width: 2%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">Name:&nbsp;&nbsp;John Heard</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">Title:&nbsp;&nbsp;Authorized Signatory</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
</TABLE>
<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Attention: Intentional misstatements or omissions
of fact constitute<BR>
Federal criminal violations (See 18 U.S.C. 1001).</B><BR STYLE="clear: both">
</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center"></P>

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<DOCUMENT>
<TYPE>EX-1
<SEQUENCE>2
<FILENAME>adicetbio_13dmar22021ex1.htm
<DESCRIPTION>JOINT FILING AGREEMENT
<TEXT>
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<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: right"><B>Exhibit 1</B></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>JOINT FILING AGREEMENT</B></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">This Agreement will confirm the agreement by
and among the undersigned that the Schedule 13D filed with the Securities and Exchange Commission on the date hereof with respect
to the beneficial ownership by the undersigned of the common stock of Adicet Bio, Inc. is being filed, and all amendments thereto
will be filed, on behalf of each of the persons and entities named below, in accordance with Rule 13d-1 under the Securities Exchange
Act of 1934, as amended. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original,
but all of which together shall constitute one and the same instrument.</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0">Dated as of March 8, 2021</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-indent: 3.5in"><B>ABINGWORTH BIOVENTURES 8, LP</B></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-indent: 3.5in">By: Abingworth LLP, its Manager</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 0 0 3.5in">By:<U>&#9;/s/ John Heard&#9;</U></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 0 0 3.5in; text-indent: 0.25in">Name: John Heard</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 0 0 3.5in; text-indent: 0.25in">Title: Authorized Signatory</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 0 0 3.5in">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 0 0 3.5in">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 0 0 3.5in">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 0 0 3.5in">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 0 0 3.5in">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 0 0 3in; text-indent: 0.5in"><B>ABINGWORTH LLP</B></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 0 0 3.5in">By:<U>&#9;/s/ John Heard&#9;</U></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 0 0 3.5in; text-indent: 0.25in">Name: John Heard</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 0 0 3.5in; text-indent: 0.25in">Title: Authorized Signatory</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>


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