<SEC-DOCUMENT>0001144204-16-127061.txt : 20161005
<SEC-HEADER>0001144204-16-127061.hdr.sgml : 20161005
<ACCEPTANCE-DATETIME>20161005170242
ACCESSION NUMBER:		0001144204-16-127061
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20160929
ITEM INFORMATION:		Changes in Registrant's Certifying Accountant
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20161005
DATE AS OF CHANGE:		20161005

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MUSTANG BIO, INC.
		CENTRAL INDEX KEY:			0001680048
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				473828760
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0312

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-55668
		FILM NUMBER:		161923137

	BUSINESS ADDRESS:	
		STREET 1:		2 GANSEVOORT STREET
		STREET 2:		9TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10014
		BUSINESS PHONE:		7816524507

	MAIL ADDRESS:	
		STREET 1:		2 GANSEVOORT STREET
		STREET 2:		9TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10014
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>v450114_8k.htm
<DESCRIPTION>FORM 8-K
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="margin: 0"></P>

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

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></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: 34%; padding-top: 6pt; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center">&nbsp;</TD>
    <TD STYLE="width: 33%; border-top: Black 1pt solid; border-bottom: Black 1pt solid; padding-top: 6pt; padding-bottom: 6pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>FORM 8-K</B></FONT></TD>
    <TD STYLE="width: 33%; padding-top: 6pt; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center">&nbsp;</TD></TR>
</TABLE>
<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">&nbsp;</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Pursuant to Section 13 or 15(d) of the
</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Securities Exchange Act of 1934</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">Date of Report (Date of earliest event reported):
September 29, 2016</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="border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt">
        <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>MUSTANG BIO, INC.</B></P></TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 5.4pt; padding-left: 5.4pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Exact Name of Registrant as Specified in
        Charter)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Delaware</B></FONT></TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>000-55668</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>47-3828760</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="padding-right: 5.4pt; padding-left: 5.4pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(State or Other Jurisdiction</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">of Incorporation)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif">(Commission File Number)</FONT></TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.4pt; padding-left: 5.4pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(IRS Employer</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Identification No.)</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2 Gansevoort Street, 9th Floor, New York, New York&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;10014</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-decoration: none; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(Address
    of Principal Executive Offices)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(Zip
    Code)</FONT></TD></TR>
<TR>
    <TD STYLE="width: 19%">&nbsp;</TD>
    <TD STYLE="width: 15%">&nbsp;</TD>
    <TD STYLE="width: 33%">&nbsp;</TD>
    <TD STYLE="width: 14%">&nbsp;</TD>
    <TD STYLE="width: 19%">&nbsp;</TD></TR>
</TABLE>
<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">Registrant&rsquo;s Telephone Number, Including
Area Code: <B><U>(781) 652-4500</U></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">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0.2in 0pt 0">Check the appropriate box below if the Form 8-K filing
is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0.2in 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 4.5pt"></TD><TD STYLE="width: 18pt"><FONT STYLE="font-family: Wingdings">&#168;</FONT></TD><TD><FONT STYLE="font-family: Times New Roman, Times, Serif">Written communications pursuant to Rule 425 under the Securities Act
(17 CFR 230.425)</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 4.5pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 4.5pt"></TD><TD STYLE="width: 18pt"><FONT STYLE="font-family: Wingdings">&#168;</FONT></TD><TD><FONT STYLE="font-family: Times New Roman, Times, Serif">Soliciting material pursuant to Rule 14a-12 under the Exchange Act
(17 CFR 240.14a-12)</FONT></TD></TR></TABLE>

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

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 4.5pt"></TD><TD STYLE="width: 18pt"><FONT STYLE="font-family: Wingdings">&#168;</FONT></TD><TD><FONT STYLE="font-family: Times New Roman, Times, Serif">Pre-commencement communications pursuant to Rule 14d-2(b) under the
Exchange Act (17 CFR 240.14d-2(b))</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 22.5pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 4.5pt"></TD><TD STYLE="width: 18pt"><FONT STYLE="font-family: Wingdings">&#168;</FONT></TD><TD><FONT STYLE="font-family: Times New Roman, Times, Serif">Pre-commencement communications pursuant to Rule 13e-4(c) under the
Exchange Act (17 CFR 240.13e-4(c))</FONT></TD></TR></TABLE>

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

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

<!-- Field: Page; Sequence: 1 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

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

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 0.75in; text-align: left"><B>Item 4.01.</B></TD><TD STYLE="text-align: justify"><B>Changes in Registrant&rsquo;s Certifying Accountant.</B></TD>
</TR></TABLE>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">(a)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Previous
independent registered public accounting firm.</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">On September 29, 2016, Mustang Bio, Inc.
(the &ldquo;Company&rdquo;) dismissed Mayer Hoffman McCann P.C. (&ldquo;Mayer Hoffman&rdquo;) as the Company&rsquo;s independent
registered public accounting firm. The Company&rsquo;s Board of Directors participated in and approved this decision.</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The reports of Mayer Hoffman on the consolidated
financial statements of the Company for the fiscal period from March 13, 2015 (inception) to December 31, 2015, did not contain
an adverse opinion or a disclaimer of opinion, nor were such reports qualified or modified as to uncertainty, audit scope, or accounting
principles, except that, the audit report included an explanatory paragraph with respect to the uncertainty as to the Company&rsquo;s
ability to continue as a going concern.</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">During the Company&rsquo;s fiscal period
from March 13, 2015 (inception) to December 31, 2015, and during the subsequent interim periods preceding the date of Mayer Hoffman&rsquo;s
dismissal, the Company did not have any disagreements with Mayer Hoffman on any matter of accounting principles or practices, financial
statement disclosure, or auditing scope or procedure, which disagreements, if not resolved to the satisfaction of Mayer Hoffman,
would have caused it to make reference to the subject matter of the disagreements in connection with its reports on the consolidated
financial statements for such time periods.</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">During the Company&rsquo;s fiscal period
from March 13, 2015 (inception) to December 31, 2015, and during the subsequent interim periods preceding the date of Mayer Hoffman&rsquo;s
dismissal, no &ldquo;reportable events&rdquo; as defined in Item 304(a)(1)(v) of Regulation S-K have occurred.</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Mayer Hoffman has indicated to the Company
that it concurs with the foregoing statements contained in the second, third and fourth paragraphs above as they relate to Mayer
Hoffman and has furnished a letter to the Securities and Exchange Commission to this effect. A copy of the letter from Mayer Hoffman
is attached to this Form 8-K as Exhibit 16.1.</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The Company will retain BDO USA, LLP (&ldquo;BDO&rdquo;) as its new independent registered public
accounting firm and will file an additional Current Report on Form 8-K when it formally engages BDO.</P>

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

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 0.75in; text-align: left">Item 9.01.</TD><TD STYLE="text-align: justify">Financial Statements and Exhibits.</TD>
</TR></TABLE>

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

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.75in">(d)</TD><TD>Exhibits.</TD></TR></TABLE>

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

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.75in; text-align: left"><U>Exhibit No.</U></TD><TD STYLE="text-align: justify"><U>Description</U></TD>
</TR></TABLE>

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

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.75in; text-align: left">16.1</TD><TD STYLE="text-align: justify">Letter from Mayer Hoffman McCann P.C. to the Securities
and Exchange Commission dated October 5, 2016.</TD>
</TR></TABLE>

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

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

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

<!-- Field: Page; Sequence: 2 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

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

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Pursuant to the requirements of the Securities
Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned thereunto duly authorized.</P>

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

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%">&nbsp;</TD>
    <TD STYLE="width: 50%"><FONT STYLE="font-family: Times New Roman, Times, Serif">Mustang Bio, Inc. </FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif">Date:&nbsp;&nbsp;October 5, 2016</FONT></TD>
    <TD STYLE="text-decoration: underline"><FONT STYLE="font-family: Times New Roman, Times, Serif"><U>/s/ Michael S. Weiss&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif">Name:&nbsp;Michael S. Weiss</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif">Title:&nbsp;&nbsp;&nbsp;President and Chief Executive Officer</FONT></TD></TR>
</TABLE>


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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 1.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 1.5in"></P>

<!-- Field: Page; Sequence: 3 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 1.5in">&nbsp;</P>

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

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

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

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 12%; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Exhibit </B></FONT></TD>
    <TD STYLE="width: 88%; font-size: 10pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt; text-decoration: underline"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B><U>Number</U></B></FONT></TD>
    <TD STYLE="font-size: 10pt; text-decoration: underline"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B><U>Description</U></B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt; text-decoration: none">&nbsp;</TD>
    <TD STYLE="font-size: 10pt; text-decoration: none">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">16.1</FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">Letter from Mayer Hoffman McCann P.C. to the Securities and Exchange Commission dated October 5, 2016.</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

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

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

<!-- Field: Page; Sequence: 4; Options: Last -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

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

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-16.1
<SEQUENCE>2
<FILENAME>v450114_ex16-1.htm
<DESCRIPTION>EXHIBIT 16.1
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="margin: 0; text-align: right"><B>Exhibit 16.1</B></P>

<P STYLE="margin: 0">&nbsp;</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">100 First Street, N.E.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Washington, D.C. 20549</P>

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

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 24.5pt">We were previously independent accountants
for Mustang Bio, Inc. (the &ldquo;Company&rdquo;).&nbsp;On September&nbsp;29, 2016, our appointment as the Company&rsquo;s independent
accountants was terminated.&nbsp;We have read the Company&rsquo;s statements included under item&nbsp;4 of its Current Report on
Form&nbsp;8-K dated on or about October 5, 2016, and we agree with the statements set forth therein insofar as such comments relate
to us.</P>

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

<TABLE CELLSPACING="0" CELLPADDING="0" ALIGN="RIGHT" STYLE="font: 10pt Times New Roman, Times, Serif; width: 40%; border-collapse: collapse">
<TR>
    <TD STYLE="width: 100%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">Very truly yours,</FONT></TD></TR>
<TR>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">/s/ Mayer Hoffman McCann, P.C.</FONT></TD></TR>
<TR>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">Mayer Hoffman McCann, P.C.</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">Orange County, California</FONT></TD></TR>
</TABLE><BR STYLE="clear: both">
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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

<P STYLE="margin: 0">&nbsp;</P>

<!-- Field: Page; Sequence: 1; Options: Last -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="margin: 0"></P>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
