<SEC-DOCUMENT>0001193125-16-637448.txt : 20160630
<SEC-HEADER>0001193125-16-637448.hdr.sgml : 20160630
<ACCEPTANCE-DATETIME>20160630080933
ACCESSION NUMBER:		0001193125-16-637448
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		7
CONFORMED PERIOD OF REPORT:	20160629
ITEM INFORMATION:		Entry into a Material Definitive Agreement
ITEM INFORMATION:		Regulation FD Disclosure
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20160630
DATE AS OF CHANGE:		20160630

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			INTREXON CORP
		CENTRAL INDEX KEY:			0001356090
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH [8731]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			VA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36042
		FILM NUMBER:		161740505

	BUSINESS ADDRESS:	
		STREET 1:		1750 KRAFT DRIVE
		STREET 2:		SUITE 1400
		CITY:			BLACKSBURG
		STATE:			VA
		ZIP:			24060
		BUSINESS PHONE:		301-556-9809

	MAIL ADDRESS:	
		STREET 1:		1750 KRAFT DRIVE
		STREET 2:		SUITE 1400
		CITY:			BLACKSBURG
		STATE:			VA
		ZIP:			24060
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>d219062d8k.htm
<DESCRIPTION>8-K
<TEXT>
<HTML><HEAD>
<TITLE>8-K</TITLE>
</HEAD>
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 <P STYLE="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&nbsp;</P>
<P STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&nbsp;</P> <P STYLE="margin-top:4pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>UNITED STATES </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>SECURITIES AND EXCHANGE COMMISSION </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:14pt; font-family:Times New Roman" ALIGN="center"><B>Washington, D.C. 20549 </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>FORM 8-K
</B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center> <P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>CURRENT REPORT </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>Pursuant
to Section 13 or 15(d) </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>of the Securities Exchange Act of 1934 </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>Date of Report (Date of earliest event reported): June 29, 2016 </B></P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center> <P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:24pt; font-family:Times New Roman" ALIGN="center"><B>INTREXON CORPORATION </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>(Exact Name of Registrant as Specified in Charter) </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD VALIGN="top" ALIGN="center"><B>Virginia</B></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" ALIGN="center"><B>001-36042</B></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" ALIGN="center"><B>26-0084895</B></TD></TR>
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<TD VALIGN="top" ALIGN="center"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(State or Other Jurisdiction</B></P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>of Incorporation)</B></P></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" ALIGN="center"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(Commission</B></P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>File Number)</B></P></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" ALIGN="center"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(IRS Employer</B></P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>Identification No.)</B></P></TD></TR>
</TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>20374 Seneca Meadows Parkway, Germantown, Maryland 20876 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(Address of Principal Executive Offices) (Zip Code) </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>(301) 556-9900 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(Registrant&#146;s telephone number, including area code) </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>N/A </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(Former name or
former address, if changed since last report) </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">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 (see General Instruction A.2. below): </P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="FONT-FAMILY:WINGDINGS">&#168;</FONT></TD>
<TD ALIGN="left" VALIGN="top">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD ALIGN="left" VALIGN="top">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="FONT-FAMILY:WINGDINGS">&#168;</FONT></TD>
<TD ALIGN="left" VALIGN="top">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="FONT-FAMILY:WINGDINGS">&#168;</FONT></TD>
<TD ALIGN="left" VALIGN="top">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) </TD></TR></TABLE> <P STYLE="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&nbsp;</P> <P STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&nbsp;</P>

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<TD WIDTH="9%" VALIGN="top" ALIGN="left"><B>Item&nbsp;1.01</B></TD>
<TD ALIGN="left" VALIGN="top"><B>Entry into a Material Definitive Agreement. </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><I>Amendments to Exclusive Channel Partner Agreement with
ZIOPHARM Oncology, Inc. for Cancer Program and to Exclusive Channel Collaboration Agreement with ZIOPHARM Oncology, Inc. for Graft-Versus-Host Disease Program </I></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">On June 29, 2016, ZIOPHARM Oncology, Inc., or ZIOPHARM, and Intrexon Corporation, or Intrexon, entered into a Third Amendment to Exclusive Channel Partner
Agreement, or the ECP Amendment, amending their existing Exclusive Channel Partner Agreement, effective January 6, 2011 and as amended to date, or the Existing ECP Agreement, and an Amendment to Exclusive Channel Collaboration Agreement, or the ECC
Amendment, amending their existing Exclusive Channel Collaboration Agreement, effective September 28, 2015, or the Existing GvHD Agreement. The Existing ECP Agreement and ECP Amendment govern the &#147;channel partnering&#148; arrangement in which
ZIOPHARM uses Intrexon&#146;s technology to research, develop and commercialize products in which DNA is administered to humans for expression of anti-cancer effectors for the purpose of treatment or prophylaxis of cancer, or, collectively, the
Cancer Program. The Existing GvHD Agreement and the ECC Amendment govern the collaboration between ZIOPHARM and Intrexon for the research, development and commercialization of products for use in the treatment or prevention of graft-versus-host
disease, or GvHD. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The ECP Amendment reduces the royalty percentage that ZIOPHARM will pay Intrexon on a quarterly basis from 50% to 20% of net profits
derived in that quarter from the sale of products developed under the Cancer Program, referred to as ZIOPHARM Products, calculated on a ZIOPHARM Product-by-ZIOPHARM Product basis, subject to certain expense allocations and other offsets provided in
the Existing ECP Agreement. The ECC Amendment reduces the royalty percentage that ZIOPHARM will pay Intrexon on a quarterly basis from 50% to 20% of net profits derived in that quarter from the sale of products developed under the GvHD collaboration
program, subject to certain expense allocations and other offsets provided in the existing Exclusive Channel Collaboration Agreement. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">In consideration
for the execution and delivery of the ECP Amendment and the ECC Amendment, collectively referred to as the Amendments, ZIOPHARM has agreed to issue to Intrexon certain shares of ZIOPHARM&#146;s preferred stock pursuant to the terms of a securities
issuance agreement discussed further below. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><I>Preferred Shares Securities Issuance Agreement </I></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">On June 29, 2016, ZIOPHARM and Intrexon entered into a Securities Issuance Agreement, or the Preferred Shares Securities Issuance Agreement, pursuant to which
ZIOPHARM agreed to issue and sell 100,000 shares of its newly designated Series 1 Preferred Stock, or the Issued Shares, in consideration of the parties entering into the Amendments to amend the royalty percentage terms. The Issued Shares will be
issued to Intrexon by ZIOPHARM as of June 30, 2016. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The parties have agreed pursuant to the terms of the Preferred Shares Securities Issuance Agreement
that the holders of common stock issued upon the conversion of the Issued Shares shall be entitled to piggy-back registration rights with respect to any common stock registered by ZIOPHARM following such conversion. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The rights, preferences, privileges, restrictions and other matters relating to the Series 1 Preferred Stock, referred to as the Preferred Shares, are set
forth in a Certificate of Designation, Preferences and Rights of Series 1 Preferred Stock, or the Certificate of Designation, which is filed herewith as Exhibit A to Exhibit 10.3 to this Current Report on Form 8-K. The Certificate of Designation
authorizes ZIOPHARM to issue 250,000 of its 30,000,000 authorized shares of preferred stock as shares of Series 1 Preferred Stock. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Each Preferred Share
has a stated value of $1,200, subject to appropriate adjustment in the event of any stock dividend, stock split, combination or other recapitalization with respect to the Preferred Shares. A summary of the material terms of the Preferred Shares
follows. </P>

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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><I>Dividend Rights</I>. The holders of the Preferred Shares shall receive a monthly dividend, payable in
additional Preferred Shares, equal to $12.00 per Preferred Share held by such holder per month divided by the stated value of the Preferred Shares, which is referred to as the PIK Dividend, rounded down to the nearest whole share. For the holders of
any shares of Preferred Shares that are not converted on the Conversion Event Date (as defined below), the rate of PIK Dividend on all remaining unconverted Preferred Shares shall automatically increase from $12.00 to $24.00 per Preferred Share per
month. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><I>Conversion</I>. The Preferred Shares shall automatically convert into shares of ZIOPHARM&#146;s common stock upon the date the first approval
in the United States of (i) a ZIOPHARM Product, as defined in and developed under the Existing ECP Agreement, (ii) a Product, as defined in and developed under the Existing GvHD Agreement or (iii) a Product, as defined in and developed under the
License and Collaboration Agreement dated March 27, 2015 and as amended from time to time, by and among Intrexon, ARES TRADING Trading, S.A. and ZIOPHARM, is publicly announced. The public announcement of such an approval is referred to as the
Conversion Event Date. On the second business day following the Conversion Event Date, each Preferred Share shall convert into a number of shares of Common Stock equal to the stated value of such Preferred Share, divided by the volume weighted
average closing price of ZIOPHARM&#146;s Common Stock as reported by the Nasdaq Stock Market, LLC over the 20 trading days ending on the Conversion Event Date; however, ZIOPHARM shall not effect any conversion of the Series 1 Preferred Stock into
shares of common stock in excess of the Conversion Limitation (defined below) without stockholder approval. The Conversion Limitation is defined as 19.9% of the lesser of (i) the pre-transaction outstanding shares of ZIOPHARM&#146;s common stock or
(ii) the outstanding shares of ZIOPHARM&#146;s common stock at the time of conversion. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><I>Voting Rights</I>. The holders of the Series 1 Preferred Stock
do not have any voting rights except that ZIOPHARM may not, without the consent of the holders of a majority of the outstanding shares of the Series 1 Preferred Stock, voting as a separate class, (i) amend, alter or repeal any provision of
ZIOPHARM&#146;s Certificate of Incorporation in a manner that adversely affects the powers, preferences or rights of the Series 1 Preferred Stock in a manner that is more adverse than the effect on any other class or series of ZIOPHARM&#146;s
capital stock; (ii) (A) create, or authorize the creation of, or issue or obligate itself to issue shares of, any additional class or series of ZIOPHARM&#146;s capital stock unless the same ranks junior or <I>pari passu </I>to the Series 1 Preferred
Stock with respect to the distribution of assets on the liquidation, dissolution or winding up of ZIOPHARM, the payment of dividends and rights of redemption, or (B) reclassify, alter or amend any existing security of ZIOPHARM that is junior or<I>
pari passu</I> to the Series 1 Preferred Stock with respect to the distribution of assets on the liquidation, dissolution or winding up of ZIOPHARM, the payment of dividends or rights of redemption, if such reclassification, alteration or amendment
would render such other security senior to the Series 1 Preferred in respect of any such right, preference or privilege; or (iii)enter into any transaction (or series of related transactions) the effect of which would adversely affect the holders of
the Series 1 Preferred Stock in a manner that is more adverse than the effect on any other class or series of ZIOPHARM&#146;s capital stock. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><I>Liquidation Rights</I>. In the event of any voluntary or involuntary liquidation, dissolution or winding up of ZIOPHARM or a &#147;Deemed Liquidation
Event,&#148; as defined in the Certificate of Designation (which includes a change of control or the sale, lease transfer or exclusive license of all or substantially all of ZIOPHARM&#146;s assets), the holders of the Preferred Shares shall be
entitled to receive a portion of all funds to be distributed in proportion to the holders&#146; proportionate share of ZIOPHARM&#146;s common stock (on an as-converted to common stock basis). The portion of the funds payable to each Preferred Share
is referred to as the Series 1 Liquidation Amount. For purposes of calculating the Series 1 Liquidation Amount, if such voluntary or involuntary liquidation, dissolution or winding up of ZIOPHARM or Deemed Liquidation Event occurs prior to the
Conversion Event Date, then each Preferred Share shall be deemed to be convertible into the number of shares of ZIOPHARM&#146;s common stock equal to (i) the stated value of such Preferred Share, divided by (ii) the volume weighted average price of
ZIOPHARM&#146;s common stock for the 20-day period ending on the date of the public announcement of such voluntary or involuntary liquidation, dissolution or winding up of ZIOPHARM or Deemed Liquidation Event, rounded down to the nearest whole
share. In addition, ZIOPHARM may elect to redeem the Preferred Shares in connection with or following a Deemed Liquidation Event at a price per share equal to the Series 1 Liquidation Amount. </P>

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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The foregoing description of each of the ECP Amendment, the ECC Amendment and the Preferred Shares Securities
Issuance Agreement and the terms of the Preferred Shares is only a summary and is qualified in its entirety by reference to such agreements and the Certificate of Designation, which are filed as Exhibits 10.1, 10.2, 10.3 and as Exhibit A to Exhibit
10.3 to this Current Report on Form 8-K, respectively, and are incorporated herein by reference. The benefits of the representations and warranties set forth in the Preferred Shares Securities Issuance Agreement are intended to be relied upon by the
parties to such agreement only and, except as otherwise expressly provided therein, do not constitute continuing representations and warranties to any other party or for any other purpose. </P>
<P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD WIDTH="9%" VALIGN="top" ALIGN="left"><B>Item&nbsp;7.01</B></TD>
<TD ALIGN="left" VALIGN="top"><B>Regulation FD Disclosure. </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">On June 30, 2016, Intrexon and ZIOPHARM issued a press release announcing the
transactions described above. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. </P> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD WIDTH="9%" VALIGN="top" ALIGN="left"><B>Item&nbsp;9.01</B></TD>
<TD ALIGN="left" VALIGN="top"><B>Financial Statements and Exhibits. </B></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD WIDTH="4%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(d)</TD>
<TD ALIGN="left" VALIGN="top">Exhibits <B></B><B></B><B></B><B></B> </TD></TR></TABLE> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD VALIGN="top" NOWRAP>10.1</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Third Amendment to Exclusive Channel Partner Agreement by and between ZIOPHARM Oncology, Inc. and Intrexon Corporation dated as of June 29, 2016</TD></TR>
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<TD VALIGN="top" NOWRAP>10.2</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Amendment to Exclusive Channel Collaboration Agreement by and between ZIOPHARM Oncology, Inc. and Intrexon Corporation dated as of June 29, 2016</TD></TR>
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<TD VALIGN="top" NOWRAP>10.3</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Securities Issuance Agreement by and between ZIOPHARM Oncology, Inc. and Intrexon Corporation dated as of June&nbsp;29, 2016</TD></TR>
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<TD VALIGN="top" NOWRAP>99.1</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Press release of Intrexon Corporation and ZIOPHARM Oncology, Inc. dated June 30, 2016</TD></TR>
</TABLE>

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<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>SIGNATURES </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">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 hereunto duly authorized. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Date:&nbsp;June 30, 2016 </P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><DIV ALIGN="right">
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="40%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt">


<TR>
<TD WIDTH="6%"></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD WIDTH="92%"></TD></TR>


<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" COLSPAN="3"><B>INTREXON CORPORATION</B></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">By:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Donald P. Lehr</P></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">Donald P. Lehr</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">Chief Legal Officer</TD></TR>
</TABLE></DIV>

<p Style='page-break-before:always'>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B><U>INDEX OF EXHIBITS </U></B></P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" ALIGN="center">


<TR>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD WIDTH="92%"></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:8pt">
<TD VALIGN="bottom" NOWRAP ALIGN="center"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>Exhibit</B></P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1.00pt solid #000000; width:25.30pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>No.</B></P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" NOWRAP ALIGN="center"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; border-bottom:1.00pt solid #000000; width:39.50pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>Description</B></P></TD></TR>


<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>10.1</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Third Amendment to Exclusive Channel Partner Agreement by and between Intrexon Corporation and ZIOPHARM Oncology, Inc. dated as of June 29, 2016</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>10.2</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Amendment to Exclusive Channel Collaboration Agreement by and between ZIOPHARM Oncology, Inc. and Intrexon Corporation dated as of June 29, 2016</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>10.3</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Securities Issuance Agreement by and between ZIOPHARM Oncology, Inc. and Intrexon Corporation dated as of June&nbsp;29, 2016</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>99.1</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Press release of Intrexon Corporation and ZIOPHARM Oncology, Inc. dated June 30, 2016</TD></TR>
</TABLE>
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<DOCUMENT>
<TYPE>EX-10.1
<SEQUENCE>2
<FILENAME>d219062dex101.htm
<DESCRIPTION>EX-10.1
<TEXT>
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<TITLE>EX-10.1</TITLE>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Exhibit 10.1 </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>T<SMALL>HIRD</SMALL> A<SMALL>MENDMENT</SMALL> <SMALL>TO</SMALL> E<SMALL>XCLUSIVE</SMALL> C<SMALL>HANNEL</SMALL> P<SMALL>ARTNER</SMALL>
A<SMALL>GREEMENT</SMALL> </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">This<B> T<SMALL>HIRD</SMALL> A<SMALL>MENDMENT</SMALL> <SMALL>TO</SMALL> <SMALL>THE</SMALL>
E<SMALL>XCLUSIVE</SMALL> C<SMALL>HANNEL</SMALL> P<SMALL>ARTNER</SMALL> A<SMALL>GREEMENT</SMALL> </B>(the &#147;<B><I>Third Amendment</I></B>&#148;) is effective as of June 29, 2016 (the &#147;<B><I>Third Amendment</I></B> <B><I>Effective
Date</I></B>&#148;) by and between <B>I<SMALL>NTREXON</SMALL> C<SMALL>ORPORATION</SMALL></B><SMALL></SMALL>, a Virginia corporation with offices at 20374 Seneca Meadows Parkway, Germantown, MD 20876 (&#147;<B><I>Intrexon</I></B>&#148;) and
<B>ZIOPHARM O<SMALL>NCOLOGY</SMALL>, I<SMALL>NC</SMALL>.</B>,<B> </B>a Delaware corporation having its principal place of business at 1180 Avenue of the Americas, 19<SUP STYLE="font-size:85%; vertical-align:top">th</SUP> Floor, New York, NY 10036
(&#147;<B><I>ZIOPHARM</I></B>&#148;). Intrexon and ZIOPHARM may be referred to herein individually as a &#147;<B><I>Party</I></B>&#148; and collectively as the &#147;<B><I>Parties.</I></B>&#148; </P>
<P STYLE="margin-top:24pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>R<SMALL>ECITALS</SMALL> </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>A.</B> <B>W<SMALL>HEREAS</SMALL> </B>Intrexon and ZIOPHARM are parties to that certain Exclusive Channel Partner Agreement, effective
January 6, 2011 (the &#147;<B><I>Agreement</I></B>&#148;), pursuant to which Intrexon appointed ZIOPHARM as its exclusive channel collaborator for developing and commercializing certain products for the treatment or prophylaxis of cancer in humans;
</P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>B.</B> <B>W<SMALL>HEREAS</SMALL> </B>Intrexon and ZIOPHARM have previously amended the Agreement by mutual written agreements executed
by the Parties on September 13, 2011 (the &#147;<B><I>First Amendment</I></B>&#148;) and on March 27, 2015 (the &#147;<B><I>Second Amendment</I></B>&#148;), and the Parties now desire to further amend the Agreement; and </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>C.</B> <B>W<SMALL>HEREAS</SMALL>, </B>the Parties now mutually desire to further amend the Agreement; </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>D.</B> <B>N<SMALL>OW</SMALL>, <SMALL>THEREFORE</SMALL>,</B> the Parties agree to amend the terms of the Agreement (as previously amended)
as provided below, effective as of the Third Amendment Effective Date. </P> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>1.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>G<SMALL>ENERALLY</SMALL> </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>1.1</B> Capitalized terms present within this Third
Amendment that are not proper names or titles, that are nor conventionally capitalized, or that are not otherwise defined within this Third Amendment shall have the meaning set forth in the Agreement (as previously amended). </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>1.2</B> The Parties, in conjunction with and contemporaneously with this Third Amendment, have entered into Preferred Stock Purchase
Agreement of even date herewith (the &#147;<B><I>Preferred Stock Agreement</I></B>&#148;). </P> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>2.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>A<SMALL>MENDMENT</SMALL> <SMALL>TO</SMALL> <SMALL>THE</SMALL> A<SMALL>GREEMENT</SMALL> </B></TD></TR></TABLE>
<P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>2.1</B> <B>Profit Sharing on ZIOPHARM Sales</B>. All references to &#147;fifty percent (50%)&#148; in Section 5.2(a) of the Agreement are
hereby amended to now read &#147;twenty percent (20%)&#148;. For clarity, neither Section 5.2(b) of the Agreement nor Section 4.1 of the Second Amendment is amended under this Third Amendment. </P>
<P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>3.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>C<SMALL>LARIFICATION</SMALL> <SMALL>OF</SMALL> <SMALL>THE</SMALL> S<SMALL>ECOND</SMALL> A<SMALL>MENDMENT</SMALL> </B></TD></TR></TABLE>
<P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>3.1</B> <B>Equity Purchase Commitment</B>.&nbsp;It is hereby clarified and agreed that Section 6.1 of the Second Amendment (and the revised
equity purchase obligation of Intrexon effected thereby) shall survive termination and/or expiration of the Merck Agreement and/or the Second Amendment. </P>

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<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>4.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>C<SMALL>OMPENSATION</SMALL> </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>4.1</B> <B>Payments from ZIOPHARM</B>.&nbsp;In partial
consideration for the amendments agreed to herein by Intrexon, ZIOPHARM shall issue to Intrexon certain shares of ZIOPHARM preferred stock in accordance with the terms and conditions of the Preferred Stock Agreement.&nbsp;Provided that all closing
conditions for delivery of stock under the Preferred Stock Agreement that are within the reasonable control of Intrexon have been satisfied or waived, the issuance of all shares under the Preferred Stock Agreement in satisfaction of this Section 4.1
is a condition subsequent to the effectiveness of this Third Amendment. </P> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>5.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>M<SMALL>ISCELLANEOUS</SMALL> </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>5.1</B> <B>Full Force and Effect. </B>This Third
Amendment amends the terms of the Agreement (as previously amended by the First Amendment and Second Amendment) and is deemed incorporated into the Agreement.&nbsp;The provisions of the Agreement as amended remain in full force and effect. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>5.2</B> <B>Entire Agreement.</B><B>&nbsp;</B>The Agreement, together with the Preferred Stock Agreement, the First Amendment, the Second
Amendment, and this Third Amendment, constitute the entire agreement, both written and oral, between the Parties with respect to the subject matter hereof, and any and all prior agreements with respect to the subject matter hereof, either written or
oral, expressed or implied, are superseded hereby, merged and canceled, and are null and void and of no effect. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>5.3</B>
<B>Counterparts. </B>This Third Amendment may be executed in one or more counterparts, each of which will be an original and all of which together will constitute one instrument. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">2 </P>


<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

 <P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>I<SMALL>N</SMALL> W<SMALL>ITNESS</SMALL> W<SMALL>HEREOF</SMALL></B><SMALL></SMALL>, Intrexon
and ZIOPHARM have executed this Third Amendment by their respective duly authorized representatives as of the Third Amendment Effective Date. </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt">


<TR>
<TD WIDTH="4%"></TD>
<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="42%"></TD>
<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="4%"></TD>
<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="4%"></TD>
<TD VALIGN="bottom"></TD>
<TD WIDTH="42%"></TD></TR>


<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" COLSPAN="3"><B>I<SMALL>NTREXON</SMALL> C<SMALL>ORPORATION</SMALL></B></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" COLSPAN="3"><B>ZIOPHARM O<SMALL>NCOLOGY</SMALL>, I<SMALL>NC</SMALL>.</B></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">By:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Randal J. Kirk</P></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">By:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Laurence J. N. Cooper, M.D., Ph.D.</P></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Name:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">Randal J. Kirk</P></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">Name:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">Laurence J. N. Cooper, M.D., Ph.D.</P></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Title:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">Chief Executive Officer</P></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">Title:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">Chief Executive Officer</P></TD></TR>
</TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Signature Page to Third Amendment to Exclusive Channel Partner Agreement </B></P>
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<TYPE>EX-10.2
<SEQUENCE>3
<FILENAME>d219062dex102.htm
<DESCRIPTION>EX-10.2
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Exhibit 10.2 </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>A<SMALL>MENDMENT</SMALL> <SMALL>TO</SMALL> E<SMALL>XCLUSIVE</SMALL> C<SMALL>HANNEL</SMALL> C<SMALL>OLLABORATION</SMALL>
A<SMALL>GREEMENT</SMALL> </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">This<B> A<SMALL>MENDMENT</SMALL> <SMALL>TO</SMALL> <SMALL>THE</SMALL> E<SMALL>XCLUSIVE</SMALL>
C<SMALL>HANNEL</SMALL> C<SMALL>OLLABORATION</SMALL> A<SMALL>GREEMENT</SMALL> </B>(the &#147;<B><I>Amendment</I></B>&#148;) is effective as of June 29, 2016 (the &#147;<B><I>Amendment</I></B> <B><I>Effective Date</I></B>&#148;) by and between
<B>I<SMALL>NTREXON</SMALL> C<SMALL>ORPORATION</SMALL></B><SMALL></SMALL>, a Virginia corporation with offices at 20374 Seneca Meadows Parkway, Germantown, MD 20876 (&#147;<B><I>Intrexon</I></B>&#148;) and <B>ZIOPHARM O<SMALL>NCOLOGY</SMALL>,
I<SMALL>NC</SMALL>.</B>,<B> </B>a Delaware corporation having its principal place of business at 1180 Avenue of the Americas, 19<SUP STYLE="font-size:85%; vertical-align:top">th</SUP> Floor, New York, NY 10036 (&#147;<B><I>ZIOPHARM</I></B>&#148;).
Intrexon and ZIOPHARM may be referred to herein individually as a &#147;<B><I>Party</I></B>&#148; and collectively as the &#147;<B><I>Parties.</I></B>&#148; </P>
<P STYLE="margin-top:24pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>R<SMALL>ECITALS</SMALL> </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>A.</B> <B>W<SMALL>HEREAS</SMALL> </B>Intrexon and ZIOPHARM are parties to that certain Exclusive Channel Collaboration Agreement, effective
September 28, 2015 (the &#147;<B><I>Agreement</I></B>&#148;), pursuant to which Intrexon appointed ZIOPHARM as its exclusive channel collaborator for developing and commercializing certain products for the prevention or treatment Graft vs Host
Disease in humans; and </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>B.</B> <B>W<SMALL>HEREAS</SMALL> </B>the Parties now mutually desire to amend the Agreement; </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>D.</B> <B>N<SMALL>OW</SMALL>, <SMALL>THEREFORE</SMALL>,</B> the Parties agree to amend the terms of the Agreement as provided below,
effective as of the Amendment Effective Date. </P> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>1.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>G<SMALL>ENERALLY</SMALL> </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>1.1</B> Capitalized terms present within this Amendment
that are not proper names or titles, that are nor conventionally capitalized, or that are not otherwise defined within this Amendment shall have the meaning set forth in the Agreement (as previously amended). </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>1.2</B> The Parties, in conjunction with and contemporaneously with this Amendment, have entered into Preferred Stock Purchase Agreement of
even date herewith (the &#147;<B><I>Preferred Stock Agreement</I></B>&#148;). </P> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>2.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>A<SMALL>MENDMENT</SMALL> <SMALL>TO</SMALL> <SMALL>THE</SMALL> A<SMALL>GREEMENT</SMALL> </B></TD></TR></TABLE>
<P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>2.1</B> <B>Profit Sharing on ZIOPHARM Sales</B>. All references to &#147;fifty percent (50%)&#148; in Section 5.2(a) of the Agreement are
hereby amended to now read &#147;twenty percent (20%)&#148;. For clarity, Section 5.2(b) of the Agreement is not amended under this Amendment. </P> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>3.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>C<SMALL>OMPENSATION</SMALL> </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>3.1</B> <B>Payments from ZIOPHARM</B>.&nbsp;In partial
consideration for the amendments agreed to herein by Intrexon, ZIOPHARM shall issue to Intrexon certain shares of ZIOPHARM preferred stock in accordance with the terms and conditions of the Preferred Stock Agreement.&nbsp;Provided that all closing
conditions for delivery of stock under the Preferred Stock Agreement that are within the reasonable control of Intrexon have been satisfied or waived, the issuance of all shares under the Preferred Stock Agreement in satisfaction of this Section 3.1
is a condition subsequent to the effectiveness of this Amendment. </P>

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<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>4.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>M<SMALL>ISCELLANEOUS</SMALL> </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>4.1</B> <B>Full Force and Effect. </B>This Amendment
amends the terms of the Agreement and is deemed incorporated into the Agreement.&nbsp;The provisions of the Agreement as amended remain in full force and effect. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>4.2</B> <B>Entire Agreement.</B><B>&nbsp;</B>The Agreement, together with the Preferred Stock Agreement, constitute the entire agreement,
both written and oral, between the Parties with respect to the subject matter hereof, and any and all prior agreements with respect to the subject matter hereof, either written or oral, expressed or implied, are superseded hereby, merged and
canceled, and are null and void and of no effect. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>4.3</B> <B>Counterparts. </B>This Amendment may be executed in one or more
counterparts, each of which will be an original and all of which together will constitute one instrument. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">2 </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>I<SMALL>N</SMALL> W<SMALL>ITNESS</SMALL> W<SMALL>HEREOF</SMALL></B><SMALL></SMALL>, Intrexon
and ZIOPHARM have executed this Amendment by their respective duly authorized representatives as of the Amendment Effective Date. </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD VALIGN="top" COLSPAN="3"><B>I<SMALL>NTREXON</SMALL> C<SMALL>ORPORATION</SMALL></B><SMALL></SMALL></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" COLSPAN="3"><B>ZIOPHARM O<SMALL>NCOLOGY</SMALL>, I<SMALL>NC</SMALL>.</B></TD></TR>
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<TD VALIGN="top">By:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Randal J. Kirk</P></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">By:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Laurence J. N. Cooper, M.D., Ph.D.</P></TD></TR>
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<TD VALIGN="top">Name:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">Randal J. Kirk</P></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">Name:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">Laurence J. N. Cooper, M.D., Ph.D.</P></TD></TR>
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<TD VALIGN="top">Title:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">Chief Executive Officer</P></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">Title:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">Chief Executive Officer</P></TD></TR>
</TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Signature Page to Amendment to Exclusive Channel Collaboration Agreement </B></P>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Exhibit 10.3 </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>SECURITIES ISSUANCE AGREEMENT </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>THIS SECURITIES ISSUANCE AGREEMENT</B> (the &#147;<B>Agreement</B>&#148;), dated as of June 29, 2016, by and among ZIOPHARM Oncology, Inc.,
a Delaware corporation (the &#147;<B>Issuer</B>&#148;), and Intrexon Corporation, a Virginia corporation (&#147;<B>Intrexon</B>&#148;). Capitalized terms used herein but not otherwise defined shall have the meanings given to them in
Section&nbsp;1.5. Intrexon and the Issuer may be referred to herein individually as a &#147;<B>Party</B>&#148; and collectively as the &#147;<B>Parties</B>.&#148; </P>
<P STYLE="margin-top:24pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>RECITALS </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">A. Concurrently
with the execution of this Agreement, the Issuer and Intrexon are entering into the Third Amendment to the Exclusive Channel Partner Agreement and an Amendment to the Exclusive Channel Collaboration Agreement (collectively, the
&#147;<B>Amendments</B>&#148;). </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">B. In consideration of entering into the Amendments, the Issuer has agreed to issue and sell to Intrexon
certain shares of the Issuer&#146;s convertible preferred stock. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">C. The Issuer and Intrexon are executing and delivering this Agreement
in reliance upon the exemption from registration afforded by Section 4(a)(2) of the Securities Act of 1933, as amended (the &#147;<B>Securities Act</B>&#148;), and Rule 506(b) of Regulation D (&#147;<B>Regulation D</B>&#148;) as promulgated by the
United States Securities and Exchange Commission (the &#147;<B>Commission</B>&#148;) under the Securities Act. </P> <P STYLE="margin-top:24pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>AGREEMENT </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>NOW</B><B>, THEREFORE, IN CONSIDERATION</B> of the mutual covenants contained in this Agreement, and for other good and valuable
consideration the receipt and adequacy of which are hereby acknowledged, the Issuer and Intrexon agree as follows: </P> <P STYLE="margin-top:24pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>ARTICLE I </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>PURCHASE AND SALE </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">1.1
<U>Authorization of Sale of Preferred Shares</U>. Subject to the terms and conditions of this Agreement, the Issuer shall issue to Intrexon One Hundred Thousand (100,000) shares of Series 1 Preferred Stock (the &#147;<B>Preferred Shares</B>&#148;).
</P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">1.2 <U>Closing</U>. Subject to the terms and conditions set forth in this Agreement, at the Closing, (a) the Issuer shall issue and sell
to Intrexon, and Intrexon shall purchase from the Issuer, the Preferred Shares.&nbsp;The closing of the issuance of the Preferred Shares to Intrexon by the Issuer (the &#147;<B>Closing</B>&#148;) will occur, subject to the conditions set forth in
Article V, on or before June 30, 2016 or on such other date as the Parties may agree upon (the &#147;<B>Closing Date</B>&#148;). The Closing shall take place at the offices of Cooley LLP, 500 Boylston Street, Boston, Massachusetts, 02116 or at such
other place as the Parties may agree upon. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">1.3 <U>Closing </U><U>Deliverables</U>.&nbsp;Promptly following the Closing, the Issuer shall
instruct its transfer agent to record in the name of Intrexon the Preferred Shares in book entry form (and, upon request, will deliver to Intrexon stock certificates registered in the name of Intrexon representing the Preferred Shares). </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">1 </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">1.4 <U>Compliance with Principal Market Rules</U>. Notwithstanding anything in this Agreement to
the contrary, the total number of shares of Common Stock that may be issued under this Agreement, shall be limited to 26,212,959 shares of Common Stock (the &#147;<B>Issuance Cap</B>&#148;), which equals 19.9% of the Issuer&#146;s outstanding shares
of Common Stock immediately prior to the date hereof, unless stockholder approval is obtained to issue more than the Issuance Cap. The Issuance Cap shall be appropriately adjusted for any stock dividend, stock split, reverse stock split or similar
transaction. The Issuer and Intrexon acknowledge and agree that any issuance of Common Stock pursuant to this Agreement in excess of the Issuance Cap will require approval by the Issuer&#146;s stockholders prior to such issuance. The Issuer intends
to seek such requisite stockholder approval, if necessary. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">1.5 <U>Defined Terms Used in This </U><U>Agreement</U>.&nbsp;In addition to
the terms defined elsewhere in this Agreement, the following terms have the meanings indicated: </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">&#147;<B>Affiliate</B>&#148; means, with
respect to any Person, any other Person that directly or indirectly controls or is controlled by or under common control with such Person. For the purposes of this definition, &#147;<B>control</B>,&#148; when used with respect to any Person, means
the possession, directly or indirectly, of the power to direct or cause the direction of the management and policies of such Person, whether through the ownership of voting securities, by contract or otherwise; and the terms of
&#147;<B>affiliated</B>,&#148; &#147;<B>controlling</B>&#148; and &#147;<B>controlled</B>&#148; have meanings correlative to the foregoing. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">&#147;<B>Common Stock</B>&#148; means the Issuer&#146;s common stock, par value $0.001 per share. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">&#147;<B>Issuer Covered Person</B>&#148; means, with respect to the Issuer as an &#147;issuer&#148; for purposes of Rule 506 promulgated under
the Securities Act, any Person listed in the first paragraph of Rule 506(d)(1). </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">&#147;<B>NASDAQ</B>&#148; means The NASDAQ Stock Market,
LLC. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">&#147;<B>Person</B>&#148; means an individual or a corporation, partnership, trust, incorporated or unincorporated association,
joint venture, limited liability company, joint stock company, government (or an agency or political subdivision thereof) or other entity of any kind. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">&#147;<B>SEC</B>&#148; means the U.S. Securities and Exchange Commission. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">&#147;<B>Series 1 Preferred Stock</B>&#148; means the Issuer&#146;s preferred stock, par value $0.001 per share. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">&#147;<B>Trading Day</B>&#148; means a NASDAQ trading day. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">&#147;<B>Transaction Documents</B>&#148; means this Agreement, the Amendments, and the schedules and exhibits attached hereto and thereto.
</P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">2 </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>ARTICLE II </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>REPRESENTATIONS AND WARRANTIES OF THE ISSUER </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Subject to and except as set forth in the SEC Documents (as defined below), which is arranged in sections corresponding to the sub-section
numbered provisions contained below in this Section, the Issuer hereby represents and warrants to Intrexon as of the date hereof as follows: </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.1 <U>Organization, Good Standing and Power</U>. The Issuer is a corporation duly incorporated, validly existing and in good standing under
the laws of the State of Delaware and has the requisite corporate power to own, lease and operate its properties and assets and to conduct its business as it is now being conducted and as described in the reports filed by the Issuer with the
Commission pursuant to the reporting requirements of the Securities Exchange Act of 1934, as amended (the &#147;<B>Exchange Act</B>&#148;), since the end of its most recently completed fiscal year through the date hereof, including, without
limitation, its most recent quarterly report on Form 10-Q. The Issuer does not have any subsidiaries. The Issuer is qualified to do business as a foreign corporation and is in good standing in every jurisdiction in which the nature of the business
conducted or property owned by it makes such qualification necessary, except for any jurisdiction(s) (alone or in the aggregate) in which the failure to be so qualified will not have a Material Adverse Effect. For the purposes of this Agreement,
&#147;<B>Material Adverse Effect</B>&#148; means any effect on the business, operations, properties or financial condition of the Issuer that is material and adverse to the Issuer, taken as a whole, and any condition, circumstance or situation that
would prohibit the Issuer from entering into and performing any of its obligations hereunder. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.2 <U>Authorization; Enforcement</U>. The
Issuer has the requisite corporate power and authority to enter into and perform the Transaction Documents and to issue and sell the Preferred Shares to be issued by the Issuer in accordance with the terms hereof. The execution, delivery and
performance of this Agreement by the Issuer and the consummation by it of the transactions contemplated hereby have been duly and validly authorized by all necessary corporate action, and no further consent or authorization of the Issuer, its board
of directors or stockholders is required other than as set forth in Sections 1.4 and 4.5. When executed and delivered by the Issuer, this Agreement shall constitute a valid and binding obligation of the Issuer enforceable against the Issuer in
accordance with its terms, except as such enforceability may be limited by applicable bankruptcy, reorganization, moratorium, liquidation, conservatorship, receivership or similar laws relating to, or affecting generally the enforcement of,
creditor&#146;s rights and remedies or by other equitable principles of general application. The Issuer&#146;s board of directors, at a meeting duly called and held, adopted resolutions approving the transactions contemplated hereby, including the
issuance of the Preferred Shares to be issued by the Issuer pursuant to this Agreement. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.3 <U>Issuance of </U><U>the </U><U>Preferred
Shares</U>. The Preferred Shares to be issued and sold by the Issuer hereunder have been duly authorized by all necessary corporate action and, when paid for and issued in accordance with the terms hereof, will be validly issued, fully paid and
nonassessable. In addition, the Preferred Shares will be free and clear of all liens, claims, charges, security interests or agreements, pledges, assignments, covenants, restrictions or other encumbrances created by, or imposed by, the Issuer
(collectively, &#147;<B>Encumbrances</B>&#148;) and rights of refusal of any kind imposed by the Issuer (other than restrictions on transfer under applicable securities laws) and the holder of the Preferred Shares shall be entitled to all rights
accorded to a holder of Common Stock. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">3 </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.4 <U>No Conflicts; Governmental Approvals</U>. The execution, delivery and performance of the
Transaction Documents by the Issuer and the consummation by the Issuer of the transactions contemplated hereby do not and will not (i) violate any provision of the Issuer&#146;s certificate of incorporation or bylaws as currently in effect, (ii)
conflict with, or constitute a default (or an event which, with notice or lapse of time or both, would become a default) under, or give to others any rights of termination, amendment, acceleration or cancellation of, any agreement, mortgage, deed of
trust, indenture, note, bond, license, lease agreement, instrument or obligation to which the Issuer is a party or by which the Issuer&#146;s properties or assets are bound, or (iii) result in a violation of any federal, state, local or foreign
statute, rule, regulation, order, judgment or decree (including federal and state securities laws and regulations) applicable to the Issuer or by which any property or asset of the Issuer is bound or affected. The Issuer is not required under
federal, state, foreign or local law, rule or regulation to obtain any consent, authorization or order of, or make any filing or registration with, any court or governmental agency in order for it to execute, deliver or perform any of its
obligations under this Agreement or issue and sell the Preferred Shares to be issued by the Issuer in accordance with the terms hereof (other than any filings, consents and approvals which may be required to be made by the Issuer under applicable
state and federal securities laws, rules or regulations prior to or subsequent to the Closing). </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.5 <U>Capitalization</U>. The issued and
outstanding shares of capital stock of the Issuer have been validly issued, are fully paid and nonassessable and are not subject to any preemptive rights, rights of first refusal or similar rights. The Issuer has an authorized, issued and
outstanding capitalization as set forth in the Issuer&#146;s most recent annual report on Form&nbsp;10-K or quarterly report on Form 10-Q (other than the grant of additional awards under the Issuer&#146;s equity incentive plans or changes in the
number of outstanding shares of Common Stock due to the issuance of shares upon the exercise or conversion of securities exercisable for, or convertible or exchangeable into, shares of Common Stock outstanding). Except as disclosed in the
Issuer&#146;s most recent annual report on Form&nbsp;10-K or quarterly report on Form 10-Q, the Issuer does not have outstanding any options to purchase, or any rights or warrants to subscribe for, or any securities or obligations convertible into,
or exchangeable for, or any contracts or commitments to issue or sell, any shares of capital stock or other securities (other than the grant of additional awards under the Issuer&#146;s equity incentive plans). </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.6 <U>SEC </U><U>Documents, Financial Statements</U>. The Issuer represents and warrants that as of the date hereof, the Issuer Common Stock
is registered pursuant to Section 12(b) of the Exchange Act. Since January&nbsp;1, 2014, the Issuer has timely filed all reports, schedules, forms, statements and other documents required to be filed by it with the Commission pursuant to the
reporting requirements of the Exchange Act (the &#147;<B>SEC Documents</B>&#148;). At the times of their respective filing, all such reports, schedules, forms, statements and other documents of the Issuer complied in all material respects with the
requirements of the Exchange Act and the rules and regulations of the Commission promulgated thereunder. At the times of their respective filings, such reports, schedules, forms, statements and other documents of the Issuer did not contain any
untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary in order to make the statements therein, in light of the circumstances under which they
</P>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">
were made, not misleading. As of the date hereof, the Issuer meets the &#147;Registrant Requirements&#148; for eligibility to use Form S-3 set forth in General Instruction I.A to Form S-3. As of
their respective dates, the financial statements of the Issuer included in the SEC Documents complied in all material respects with applicable accounting requirements and the published rules and regulations of the Commission or other applicable
rules and regulations with respect thereto. Such financial statements have been prepared in accordance with generally accepted accounting principles applied on a consistent basis during the periods involved (except (i) as may be otherwise indicated
in such financial statements or the notes thereto or (ii) in the case of unaudited interim statements, to the extent they may not include footnotes or may be condensed or summary statements), and fairly present in all material respects the
consolidated financial position of the Issuer as of the dates thereof and the results of operations and cash flows for the periods then ended (subject, in the case of unaudited statements, to normal year-end audit adjustments). </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.7 <U>Accountants</U>.&nbsp;The Issuer represents and warrants that RSM US LLP, whose report on the financial statements of the Issuer is
filed with the Commission in the Issuer&#146;s Annual Report on Form 10-K for the year ended December 31, 2015, was, at the time such report was issued, an independent registered public accounting firm as required by the Securities Act. Except as
described in the SEC Documents and as preapproved in accordance with the requirements set forth in Section 10A of the Exchange Act, to the Issuer&#146;s knowledge, RSM US LLP has not engaged in any non-audit services prohibited by subsection (g) of
Section 10A of the Exchange Act on behalf of the Issuer. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.8 <U>Internal </U><U>Controls</U>. The Issuer has established and maintains a
system of internal accounting controls sufficient to provide reasonable assurances that: (i) transactions are executed in accordance with management&#146;s general or specific authorization; (ii) transactions are recorded as necessary to permit
preparation of financial statements in conformity with generally accepted accounting principles in the United States and to maintain accountability for assets; (iii) access to assets is permitted only in accordance with management&#146;s general or
specific authorization; and (iv) the recorded accountability for assets is compared with existing assets at reasonable intervals and appropriate action is taken with respect to any differences. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.9 <U>Disclosure Controls</U>. The Issuer has established and maintains disclosure controls and procedures (as such term is defined in Rules
13a-15 and 15d-15 under the Exchange Act). Since the date of the most recent evaluation of such disclosure controls and procedures, there have been no significant changes in internal controls or in other factors with respect to the Issuer that could
significantly affect the Issuer&#146;s internal controls, including any corrective actions with regard to significant deficiencies and material weaknesses. The Issuer is in compliance in all material respects with all provisions currently in effect
and applicable to the Issuer of the Sarbanes-Oxley Act of 2002, and all rules and regulations promulgated thereunder or implementing the provisions thereof. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.10 <U>No Material Adverse Change</U>. Except as disclosed in the SEC Documents, since December 31, 2014, the Issuer has not (i) experienced
or suffered any Material Adverse Effect, (ii) incurred any material liabilities, obligations, claims or losses (whether liquidated or unliquidated, secured or unsecured, absolute, accrued, contingent or otherwise) other than those incurred in the
ordinary course of the Issuer&#146;s business or (iii) declared, made or paid any dividend or distribution of any kind on its capital stock. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">5 </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.11 <U>No Undisclosed Events or Circumstance</U>s. Except as disclosed in the SEC Documents,
since December 31, 2014, except for the consummation of the transactions contemplated herein, to the Issuer&#146;s knowledge, no event or circumstance has occurred or exists with respect to the Issuer or its businesses, properties, prospects,
operations or financial condition, which, under applicable law, rule or regulation, requires public disclosure or announcement by the Issuer but which has not been so publicly announced or disclosed. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.12 <U>Litigation</U>. Except as disclosed in the SEC Documents, no action, suit, proceeding or investigation is currently pending or, to the
knowledge of the Issuer, has been threatened in writing against the Issuer that: (i) concerns or questions the validity of this Agreement; (ii) concerns or questions the right or authority of the Issuer to enter into the Transaction Documents and to
perform its obligations thereunder; or (iii) is reasonably likely to have a Material Adverse Effect. The Issuer is neither a party to nor subject to the provisions of any material order, writ, injunction, judgment or decree of any court or
government agency or instrumentality. There is no action, suit, proceeding or investigation by the Issuer currently pending or that the Issuer intends to initiate that would have a Material Adverse Effect. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.13 <U>Compliance</U>. The Issuer (i) is not in violation of any provision of the Issuer&#146;s certificate of incorporation or bylaws as
currently in effect, (ii) is not in default under or in violation of (and no event has occurred that has not been waived that, with notice or lapse of time or both, would result in a default by the Issuer under), nor has the Issuer received notice
of a claim that it is in default under or that it is in violation of, any indenture, loan or credit agreement or any other agreement or instrument to which it is a party or by which it or any of its properties is bound (whether or not such default
or violation has been waived), (iii) is not in violation of any order of any court, arbitrator or governmental body, or (iv) is not or has not been in violation of any statute, rule or regulation of any governmental authority, including without
limitation all foreign, federal, state and local laws applicable to its business, except in each case (other than with respect to clause (i) above) for such defaults or violations as would not have a Material Adverse Effect. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.14 <U>Listing and Maintenance Requirements</U>. The Issuer is in compliance with the requirements of NASDAQ for continued listing of the
Common Stock thereon and the Issuer has not received any notification that, and has no knowledge that the NASDAQ is contemplating terminating such listing. The issuance and sale of the Preferred Shares hereunder does not contravene the rules and
regulations of NASDAQ in any material respect. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.15 <U>Investment Company Act</U>. The Issuer is not and, after giving effect to the
offering and sale of the Preferred Shares, will not be an &#147;investment company&#148; or an entity &#147;controlled&#148; by an &#147;investment company,&#148; as such terms are defined in the Investment Company Act of 1940. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.16 <U>Private Placement</U>. Neither the Issuer nor its Affiliates, nor any Person acting on its or their behalf, (i) has engaged in any
form of general solicitation or general advertising (within the meaning of Regulation D under the Securities Act) in connection with the offer or sale of the Preferred Shares hereunder, (ii) has, directly or indirectly, made any offers or sales of
</P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">6 </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">
any security or solicited any offers to buy any security, under any circumstances that would require registration of the sale and issuance by the Issuer of the Preferred Shares under the
Securities Act or (iii) has issued any shares of Common Stock or shares of any series of preferred stock or other securities or instruments convertible into, exchangeable for or otherwise entitling the holder thereof to acquire shares of Common
Stock which would be integrated with the sale of the Preferred Shares to Intrexon for purposes of the Securities Act or of any applicable stockholder approval provisions, including, without limitation, under the rules and regulations of any exchange
or automated quotation system on which any of the securities of the Issuer are listed or designated, nor will the Issuer or any of its Affiliates take any action or steps that would require registration of any of the Preferred Shares under the
Securities Act or cause the offering of the Preferred Shares to be integrated with other offerings. Assuming the accuracy of the representations and warranties of Intrexon, the offer and sale of the Preferred Shares to be issued by the Issuer to
Intrexon pursuant to this Agreement will be exempt from the registration requirements of the Securities Act. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.17 <U>No Manipulation of
Stock</U>. The Issuer has not taken and will not, in violation of applicable law, take, any action outside the ordinary course of business designed to or that might reasonably be expected to cause or result in unlawful manipulation of the price of
the Common Stock. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.18 <U>Brokers</U>. Neither the Issuer nor any of the officers, directors or employees of the Issuer has employed any
broker or finder in connection with the transaction contemplated by this Agreement. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.19 <U>OFAC</U>. Neither the Issuer nor, to the
Issuer&#146;s knowledge, any director, officer, agent, employee, Affiliate or person acting on behalf of the Issuer, is currently subject to any U.S. sanctions administered by the Office of Foreign Assets Control of the U.S. Treasury Department.
</P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">2.20 <U>Reliance</U>.&nbsp;The Issuer understands that the foregoing representations and warranties shall be deemed material and to have
been relied upon by Intrexon. </P> <P STYLE="margin-top:24pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>ARTICLE III </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B><U>REPRESENTATIONS, WARRANTIES AND COVENANTS OF INTREXON </U></B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Intrexon hereby represents, warrants and covenants to the Issuer as follows: </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">3.1 <U>Authorization and Power</U>.&nbsp;Intrexon has the requisite power and authority to enter into and perform the Transaction Documents
and to purchase the Preferred Shares being sold to it hereunder. The execution, delivery and performance of this Agreement by Intrexon and the consummation by it of the transactions contemplated hereby have been duly authorized by all necessary
corporate action, and no further consent or authorization of Intrexon or its board of directors, stockholders or other governing body is required. When executed and delivered by Intrexon, this Agreement shall constitute a valid and binding
obligation of Intrexon, enforceable against Intrexon in accordance with its terms, except as such enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium, liquidation, conservatorship, receivership or similar
laws relating to, or affecting generally the enforcement of, creditor&#146;s rights and remedies or by other equitable principles of general application. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">7 </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">3.2 <U>No Conflict</U>. The execution, delivery and performance of the Transaction Documents by
Intrexon and the consummation by Intrexon of the transactions contemplated hereby do not and will not (i) violate any provision of Intrexon&#146;s charter or organizational documents, (ii) conflict with, or constitute a default (or an event which
with notice or lapse of time or both would become a default) under, or give to others any rights of termination, amendment, acceleration or cancellation of, any agreement, mortgage, deed of trust, indenture, note, bond, license, lease agreement,
instrument or obligation to which Intrexon is a party or by which Intrexon&#146;s properties or assets are bound, or (iii) result in a violation of any federal, state, local or foreign statute, rule, regulation, order, judgment or decree (including
federal and state securities laws and regulations) applicable to Intrexon or by which any property or asset of Intrexon are bound or affected, except, in all cases, other than violations (with respect to federal and state securities laws) above, for
such conflicts, defaults, terminations, amendments, acceleration, cancellations and violations as would not, individually or in the aggregate, materially and adversely affect Intrexon&#146;s ability to perform its obligations under this Agreement.
</P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">3.3 <U>Purchaser Sophistication; Accredited Investor</U>. Intrexon (a) is knowledgeable, sophisticated and experienced in making, and is
qualified to make decisions with respect to, investments in shares presenting an investment decision like that involved in the purchase of the Preferred Shares, including investments in securities issued by the Issuer and investments in comparable
companies, and has requested, received, reviewed and considered all information it deemed relevant in making an informed decision to purchase the Preferred Shares; (b) in connection with its decision to purchase the Preferred Shares, relied only
upon the SEC Documents, other publicly available information, and the representations and warranties of the Issuer contained herein; (c) is an &#147;accredited investor&#148; pursuant to Rule 501 of Regulation D under the Securities Act; (d) is
acquiring the Preferred Shares for its own account for investment only and with no present intention of distributing any of the Preferred Shares or any arrangement or understanding with any other persons regarding the distribution of the Preferred
Shares; (e) has not been organized, reorganized or recapitalized specifically for the purpose of investing in the Preferred Shares; (f) will not, directly or indirectly, offer, sell, pledge, transfer or otherwise dispose of (or solicit any offers to
buy, purchase or otherwise acquire to take a pledge of) any of the Preferred Shares except in compliance with the Securities Act and applicable state securities laws; (g) understands that the Preferred Shares are being offered and sold to it in
reliance upon specific exemptions from the registration requirements of the Securities Act and state securities laws, and that the Issuer is relying upon the truth and accuracy of, and Intrexon&#146;s compliance with, the representations,
warranties, agreements, acknowledgments and understandings of Intrexon set forth herein in order to determine the availability of such exemptions and the eligibility of Intrexon to acquire the Preferred Shares; (h) understands that its investment in
the Preferred Shares involves a significant degree of risk, including a risk of total loss of Intrexon&#146;s investment (provided that such acknowledgment in no way diminishes the representations, warranties and covenants made by the Issuer
hereunder); and (i) understands that no United States federal or state agency or any other government or governmental agency has passed upon or made any recommendation or endorsement of the Preferred Shares. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">8 </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">3.4 <U>Restricted Shares</U>. Intrexon acknowledges that the Preferred Shares (and the shares of
Common Stock into which the Preferred Shares are convertible) are restricted securities and must be held indefinitely unless subsequently registered under the Securities Act or the Issuer receives an opinion of counsel reasonably satisfactory to the
Issuer that such registration is not required. Intrexon is aware of the provisions of Rule 144 promulgated under the Securities Act which provide a safe harbor for the limited resale of stock purchased in a private placement subject to the
satisfaction of certain conditions (if applicable), including, among other things, the existence of a public market for the stock, the availability of certain current public information about the Issuer, the resale occurring after certain holding
periods have been met, the sale being conducted through a &#147;broker&#146;s transaction&#148; or a transaction directly with a &#147;market maker&#148; and the number of shares of the stock being sold during any three-month period not exceeding
specified limitations. Intrexon further acknowledges and understands that the Issuer may not be satisfying the current public information requirement of Rule 144 at the time Intrexon wishes to sell the shares of Common Stock into which the Preferred
Shares are convertible and, if so, Intrexon may be precluded from selling such shares under Rule 144 even if the required holding period has been satisfied. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">3.5 <U>Ownership of Capital Stock</U>. As of the date hereof, excluding the Preferred Shares, Intrexon and its Affiliates beneficially own
9,717,403 shares of Common Stock. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">3.6 <U>Stock Legends</U>. Intrexon acknowledges that certificates evidencing the Preferred Shares shall
bear a restrictive legend in substantially the following form (and including related stock transfer instructions and record notations): </P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">THESE SECURITIES HAVE NOT BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE
UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE &#147;SECURITIES ACT&#148;), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR
PURSUANT TO AN AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS OR BLUE SKY LAWS AS EVIDENCED BY A LEGAL OPINION OF COUNSEL
REASONABLY SATISFACTORY TO THE COMPANY. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">3.7 <U>No Legal, Tax or Investment Advice</U>. Intrexon understands that nothing in this
Agreement or any other materials presented by or on behalf of the Issuer to Intrexon in connection with the purchase of the Preferred Shares constitutes legal, tax or investment advice. Intrexon has consulted such legal, tax and investment advisors
as it, in its sole discretion, has deemed necessary or appropriate in connection with its purchase of the Preferred Shares. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">3.8
<U>Brokers and Finders</U>. No Person will have, as a result of the transactions contemplated by this Agreement, any valid right, interest or claim against or upon the Issuer or Intrexon for any commission, fee or other compensation pursuant to any
agreement, arrangement or understanding entered into by or on behalf of Intrexon. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">3.9 <U>Regulation M</U>. Intrexon is aware that the
anti-manipulation rules of Regulation M under the Exchange Act may apply to sales of Common Stock and other activities with respect to Common Stock. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">9 </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>ARTICLE IV </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>COVENANTS OF THE PARTIES </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">4.1 <U>Piggyback Rights.</U> </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman">(a) At any time after the conversion of the Preferred Shares and until the time such shares are able to be sold under Rule 144 without regard
to the volume, notice, information and manner of sale provisions, if the Issuer proposes to file on its behalf and/or on behalf of any of its stockholders a Registration Statement under the Securities Act on any form for the registration of
securities with respect to its Common Stock or any other class of equity security of the Issuer, the Issuer shall give written notice (&#147;<B>Piggy-Back Notice</B>&#148;) to Intrexon as promptly as practicable, but in no event less than five (5)
business days prior to the anticipated filing thereof, specifying (x) the approximate date on which the Issuer proposes to file such Registration Statement, (y) the estimated offering price of the securities and the intended method of distribution
in connection therewith, and (z) advising Intrexon of its right, subject to the provisions of this Agreement, to have shares of Common Stock resulting from the conversion of the Preferred Shares then held included among the securities to be covered
by such registration statement (&#147;<B>Piggy-Back Rights</B>&#148;). </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman">(b) Notwithstanding paragraph (a) above, if the lead managing
underwriter(s) selected for an underwritten offering for which Piggy-Back Rights are requested shall advise that marketing or other factors require a limitation on the number of shares of securities which can be sold in such offering within a price
range acceptable to the Issuer, then, (i) such underwriters shall provide written notice thereof to Intrexon and (ii) there shall be included in the offering, (A) first, the Common Stock proposed to be registered by the Issuer and (B) second, on a
pro rata basis, the Common Stock required to be included in such registration statement by Intrexon and any other shares of Common Stock for the account of persons other than Intrexon required to be so registered. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">4.2 <U>Further Transfers</U>.&nbsp;Intrexon covenants that the Preferred Shares (and the shares of Common Stock into which the Preferred
Shares are convertible) will only be sold, offered for sale, pledged, loaned, or otherwise disposed of pursuant to an effective registration statement under, and in compliance with the requirements of, the Securities Act or pursuant to an available
exemption from the registration requirements of the Securities Act, and in compliance with any applicable state securities laws. In connection with any transfer of Preferred Shares other than pursuant to an effective registration statement or Rule
144, the Issuer may require Intrexon to provide to the Issuer an opinion of counsel selected by Intrexon, the form and substance of which opinion shall be reasonably satisfactory to the Issuer, to the effect that such transfer does not require
registration under the Securities Act. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">10 </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">4.3 <U>Furnishing of Information</U>.&nbsp;The Issuer shall, at all times prior to the earlier to
occur of (x) the date of sale or other disposition by Intrexon of the shares of Common Stock issued upon conversion of the Preferred Shares or (y) the registration pursuant to Section 4.1 of the shares issued upon conversion of the Preferred Shares,
use its commercially reasonable efforts to timely file (or obtain extensions in respect thereof and file within the applicable grace period) all reports required to be filed by the Issuer after the date hereof pursuant to the Exchange Act.&nbsp;If,
during such period, the Issuer is not required to file reports pursuant to the Exchange Act, it shall use its commercially reasonable efforts to prepare and furnish to Intrexon and make publicly available in accordance with Rule&nbsp;144(c) such
information as is required for Intrexon to sell the Preferred Shares under Rule 144. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">4.4 <U>No Integration</U>.&nbsp;The Issuer shall
not, and shall use its commercially reasonable efforts to ensure that no Affiliate of the Issuer shall, sell, offer for sale or solicit offers to buy or otherwise negotiate in respect of any security (as defined in Section 2 of the Securities Act)
that will be integrated with the offer or sale of the Preferred Shares pursuant to this Agreement in a manner that would require the registration under the Securities Act of the sale of the Preferred Shares to Intrexon, or that will be integrated
with the offer or sale of the Preferred Shares pursuant to this Agreement for purposes of the rules and regulations of NASDAQ such that it would require stockholder approval prior to the closing of such other transaction unless stockholder approval
is obtained before the closing of such subsequent transaction. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">4.5 <U>Stockholder Approval</U>.&nbsp;In the event the Issuer determines
that the Issuance Cap will be exceeded by the conversion of the Preferred Shares, then the Issuer shall (i) no later than its next annual meeting of stockholders after the date of such determination, hold a vote with respect to the issuance by the
Issuer to Intrexon of an amount of Common Stock equal to the number of shares exceeding the Issuance Cap (subject to appropriate adjustment for stock splits, dividends, combinations, recapitalizations and the like affecting the Common Stock); (ii)
solicit the approval of its stockholders with respect to such issuance, (iii) recommend that its stockholders approve such issuance and, (iv) if requisite stockholder approval is obtained therefor in accordance with applicable NASDAQ rules, effect
such issuance.&nbsp;The obligations of this Section 4.5 shall continue until stockholder approval has been obtained with respect to the issuance of the shares exceeding the Issuance Cap and such issuance has occurred. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">4.6 <U>Information Rights</U>. At any time while this Agreement is outstanding or Intrexon holds Preferred Shares acquired under this
Agreement (or Common Stock issued upon the conversion thereof), if (and then for only so long as) the Issuer is either (i)&nbsp;not subject to SEC reporting obligations under Section&nbsp;13(a) or Section&nbsp;15(d) of the Securities Exchange Act of
1934, as amended, or (ii)&nbsp;is not timely in filing the SEC Documents (after giving effect to extensions pursuant to Rule 12b-25(b)), then Intrexon shall be entitled to receive the information required to be included in the SEC Documents. The
filing of the SEC Document with the SEC shall constitute valid delivery of such reports to Intrexon hereunder. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">11 </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>ARTICLE V </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>CONDITIONS TO CLOSING </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">5.1
<U>Conditions Precedent to the Obligations of Intrexon</U>. The obligation of Intrexon to acquire the Preferred Shares at the Closing is subject to the satisfaction or waiver by Intrexon, at or before the Closing, of each of the following
conditions: </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman">(a) <U>Representations and Warranties</U>. The representations and warranties of the Issuer contained in Article II shall be
true and correct in all respects as of the date of this Agreement and as of the Closing Date. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman">(b) <U>Performance</U>. The Issuer shall
have performed and complied with all covenants, agreements, obligations and conditions contained in this Agreement that are required to be performed or complied with by the Issuer on or before the Closing. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman">(c) <U>No Injunction</U>. No statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted, entered,
promulgated or endorsed by any court or governmental authority of competent jurisdiction that prohibits the consummation of any of the transactions contemplated by the Transaction Documents. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman">(d) <U>Listing of Additional Shares</U>. The Issuer shall have submitted a Listing of Additional Shares Notification with NASDAQ covering all
of the shares of Common Stock&nbsp;into which the Preferred Shares are convertible. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman">(e) <U>Amendments</U>.&nbsp;The Issuer shall have
executed and delivered the Amendments, and the Amendments shall be in full force and effect. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman">(f) <U>Certificate of
Designation</U>.&nbsp;The Issuer shall have filed the Certificate of Designation, Preferences and Rights of the Series 1 Preferred Stock in the form of <U>Exhibit A</U> (the &#147;<B>Certificate of Designation</B>&#148;) with the Secretary of State
of Delaware on or prior to the Closing, which shall continue to be in full force and effect as of the Closing. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">5.2 <U>Conditions
Precedent to the Obligations of the </U><U>Issuer</U>. The obligation of the Issuer to issue the Preferred Shares at the Closing is subject to the satisfaction or waiver by the Issuer, at or before the Closing, of each of the following conditions:
</P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman">(a) <U>Representations and Warranties</U>. The representations and warranties of Intrexon contained in Article III shall be true and
correct in all respects as of the Closing. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman">(b) <U>Performance</U>. Intrexon shall have performed, satisfied and complied in all material
respects with all covenants, agreements and conditions required by the Transaction Documents to be performed, satisfied or complied with by Intrexon at or prior to the Closing. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman">(c) <U>No Injunction</U>. No statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted, entered,
promulgated or endorsed by any court or governmental authority of competent jurisdiction that prohibits the consummation of any of the transactions contemplated by the Transaction Documents </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">12 </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman">(d) <U>&#147;</U><U>Bad Actor</U><U>&#148;</U><U> Certifications</U>. The Issuer and each Issuer
Covered Person shall have provided to the Issuer a properly completed and executed questionnaire in the form of <U>Exhibit</U><U>&nbsp;</U><U>B</U> hereto prior to the date hereof and on or prior to the Closing Date no &#147;bad actor&#148;
disqualifying event described in Rule 506(d)(1)(i)-(viii) of the Securities Act (a &#147;<B>Disqualification Event</B>&#148;) is applicable to the Issuer or, to the Issuer&#146;s knowledge, the Issuer Covered Person, except for a Disqualification
Event as to which Rule 506(d)(2)(ii&#150;iv) or (d)(3), is applicable. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman">(e) <U>Amendment</U>.&nbsp;Intrexon shall have executed and
delivered the Amendments, and the Amendments shall be in full force and effect. </P> <P STYLE="margin-top:24pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>ARTICLE VI </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>MISCELLANEOUS </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">6.1
<U>Survival of Warranties</U>.&nbsp;Unless otherwise set forth in this Agreement, the representations and warranties of the Issuer and Intrexon contained in or made pursuant to this Agreement (a) shall survive the execution and delivery of this
Agreement and the Closing for a period of three (3) years after the Closing; <I>provided</I>, <I>however</I>, notwithstanding the foregoing, the representations and warranties of the Issuer set forth in Sections 2.1, 2.2 and 2.3 shall survive the
execution and delivery of this Agreement and the Closing indefinitely; and (b) shall in no way be affected by any investigation or knowledge of the subject matter thereof made by or on behalf of Intrexon or the Issuer. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">6.2 <U>No Finder</U><U>&#146;</U><U>s Fees</U>. Each party represents that it neither is nor will be obligated for any finder&#146;s fee or
commission in connection with this transaction.&nbsp;The Issuer agrees to indemnify and to hold harmless Intrexon from any liability for any commission or compensation in the nature of a finder&#146;s or broker&#146;s fee arising out of this
transaction (and the costs and expenses of defending against such liability or asserted liability) for which the Issuer or any of its officers, employees or representatives is responsible. Intrexon, severally, agrees to indemnify and hold harmless
the Issuer from any liability for any commission or compensation in the nature of a finder&#146;s or broker&#146;s fee arising out of this transaction (and the costs and expenses of defending against such liability or asserted liability) for which
Intrexon or any of its officers, employees or representatives is responsible. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">6.3 <U>Fees and Expenses</U>. Each party shall pay the fees
and expenses of its advisors, counsel, accountants and other experts, if any, and all other expenses, incurred by such party incident to the negotiation, preparation, execution, delivery and performance of this Agreement. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">6.4 <U>Entire </U><U>Agreement</U>. The Transaction Documents, together with the Exhibits and Schedules thereto, contain the entire
understanding of the Parties with respect to the subject matter hereof and supersede all prior agreements and understandings, oral or written, with respect to such matters, which the Parties acknowledge have been merged into such documents, exhibits
and schedules. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">6.5 <U>Notices</U>. Any and all notices or other communications or deliveries required or permitted to be provided
hereunder shall be in writing and shall be deemed given and effective on the earliest of (a) the date of transmission, if such notice or communication is delivered via </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">13 </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">
facsimile or email at the facsimile number or email address specified in this Section prior to 4:00 p.m. (New York City time) on a Trading Day, (b) the next Trading Day after the date of
transmission, if such notice or communication is delivered via facsimile or email at the facsimile number or email address specified in this Section on a day that is not a Trading Day or later than 4:00 p.m. (New York City time) on any Trading Day,
(c) the Trading Day following the date of deposit with a nationally recognized overnight courier service, or (d) upon actual receipt by the party to whom such notice is required to be given. The addresses, facsimile numbers and email addresses for
such notices and communications are those set forth below, or such other address or facsimile number as may be designated in writing hereafter, in the same manner, by any such Person: </P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" ALIGN="center">


<TR>
<TD WIDTH="24%"></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD WIDTH="74%"></TD></TR>


<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">If to the Issuer:</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">ZIOPHARM Oncology, Inc.</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">1 First Avenue</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Parris Building, #34</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Boston, MA 02129</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Attention: Chief Executive Officer</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Email:</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Fax No.:</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" ROWSPAN="4">with copies (which copies shall not constitute notice to the Issuer) to:</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Cooley LLP</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">500 Boylston Street</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Boston, MA 02116</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Attention: Marc Recht</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Email:</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Fax No.:</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">If to Intrexon</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Intrexon Corporation</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">20358 Seneca Meadows Parkway</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Germantown, MD 20876</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Attention: Legal Department</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Fax No.:</TD></TR>
</TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">6.6 <U>Amendments; Waivers</U>. This Agreement and any term hereof may be amended, terminated or waived only
with the written consent of the Issuer and Intrexon. No waiver of any default with respect to any provision, condition or requirement of this Agreement shall be deemed to be a continuing waiver in the future or a waiver of any subsequent default or
a waiver of any other provision, condition or requirement hereof, nor shall any delay or omission of either party to exercise any right hereunder in any manner impair the exercise of any such right. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">6.7 <U>Construction</U>. The headings herein are for convenience only, do not constitute a part of this Agreement and shall not be deemed to
limit or affect any of the provisions hereof. The language used in this Agreement will be deemed to be the language chosen by the Parties to express their mutual intent, and no rules of strict construction will be applied against any party. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">6.8 <U>Successors and Assigns</U>. This Agreement shall be binding upon and inure to the benefit of the Parties and their successors and
permitted assigns. The Issuer may not assign this Agreement or any rights or obligations hereunder without the prior written consent of Intrexon; </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">14 </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">
<I>provided</I>, <I>however</I>, that no such consent shall be required in connection with any assignment (i) occurring by operation of law in connection with any merger or consolidation to which
the Issuer is a party, (ii) in connection with the acquisition of all or substantially all of the assets of the Issuer or (iii) any other similar business combination transaction involving the Issuer. Intrexon may assign its rights under this
Agreement only to a Person to whom Intrexon assigns or transfers all Preferred Shares held by Intrexon; <I>provided</I>, <I>that</I> (i) following such transfer or assignment, the further disposition of the Preferred Shares by the transferee or
assignee is restricted under the Securities Act and applicable state securities laws, (ii) as a condition of such transfer, such transferee agrees in writing to be bound by all of the terms and conditions of this Agreement as a party hereto and
(iii) such transfer shall have been made in accordance with the applicable requirements of this Agreement and with all laws applicable thereto. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">6.9 <U>Persons </U><U>Entitled to Benefit of </U><U>Agreement</U>. This Agreement is intended for the benefit of the Parties hereto and their
respective permitted successors and assigns and is not for the benefit of, nor may any provision hereof be enforced by, any other person. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">6.10 <U>Governing Law</U>.&nbsp;This Agreement will be governed by the laws of the State of New York as applied to contracts entered into and
performed entirely in the State of New York by New York residents,&nbsp;without regard to conflict of law principles. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">6.11
<U>Counterparts; Execution</U>. This Agreement may be executed in three (3) or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.&nbsp;Counterparts may be delivered
via facsimile, electronic mail (including pdf or any electronic signature complying with the U.S. federal ESIGN Act of 2000, e.g., www.docusign.com) or other transmission method and any counterpart so delivered shall be deemed to have been duly and
validly delivered and be valid and effective for all purposes. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">6.12 <U>Severability</U>. If any provision hereof should be held invalid,
illegal or unenforceable in any respect, then, to the fullest extent permitted by law, (a) all other provisions hereof shall remain in full force and effect and shall be liberally construed in order to carry out the intentions of the Parties as
nearly as may be possible and (b) the Parties shall use their best efforts to replace the invalid, illegal or unenforceable provision(s) with valid, legal and enforceable provision(s) which, insofar as practical, implement the purposes of such
provision(s) in this Agreement. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">6.13 <U>Waiver of Conflicts</U>. Each party to this Agreement acknowledges that Cooley LLP
(&#147;<B>Cooley</B>&#148;), outside general counsel to the Issuer, has in the past performed and is or may now or in the future represent Intrexon or its affiliates in matters unrelated to the transactions contemplated by the Transaction Documents
and the Certificate of Designation (collectively, the &#147;<B>Transactions</B>&#148;). The applicable rules of professional conduct require that Cooley inform the parties hereunder of this representation and obtain their consent. Cooley has served
as outside general counsel to the Issuer and has negotiated the terms of the Transactions solely on behalf of the Issuer. The Issuer and Intrexon hereby (a) acknowledge that they have had an opportunity to ask for and have obtained information
relevant to such representation, including disclosure of the reasonably foreseeable adverse consequences of such representation; (b) acknowledge that with respect to the Transactions, Cooley has represented solely the Issuer, and not Intrexon or any
stockholder, director or employee of the Issuer or Intrexon; and (c) gives its informed consent to Cooley&#146;s representation of the Issuer in the Transactions. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">[SIGNATURE PAGES TO FOLLOW] </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">15 </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>IN WITNESS WHEREOF</B>, the parties hereto have caused this Securities Issuance Agreement to
be duly executed by their respective authorized signatories as of the date first indicated above. </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><DIV ALIGN="right">
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="40%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt">


<TR>
<TD WIDTH="6%"></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD WIDTH="92%"></TD></TR>


<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" COLSPAN="3"><B>ZIOPHARM ONCOLOGY, INC.</B></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">By:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Laurence J.N. Cooper, M.D., Ph.D.</P></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">Laurence J.N. Cooper, M.D., Ph.D.</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">Chief Executive Officer</TD></TR>
</TABLE></DIV>

<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

 <P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>IN WITNESS WHEREOF</B>, the parties hereto have caused this Securities Issuance Agreement to
be duly executed by their respective authorized signatories as of the date first indicated above. </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><DIV ALIGN="right">
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="40%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt">


<TR>
<TD WIDTH="12%"></TD>
<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="87%"></TD></TR>


<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" COLSPAN="3"><B>INTREXON CORPORATION</B></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">By:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Randal J. Kirk</P></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Name:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">Randal J. Kirk</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Title:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">Chief Executive Officer</TD></TR>
</TABLE></DIV>

<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Exhibit A </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B><U>CERTIFICATE OF DESIGNATION </U></B></P>

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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>ZIOPHARM ONCOLOGY, INC. </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>CERTIFICATE OF DESIGNATION, PREFERENCES AND RIGHTS </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>OF THE SERIES&nbsp;1 PREFERRED STOCK </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Pursuant to Section&nbsp;151(g) of the General Corporation Law of the State of Delaware (the &#147;<B><I>DGCL</I></B>&#148;) and
Article&nbsp;4 of the Corporation&#146;s Amended and Restated Certificate of Incorporation (the &#147;<B><I>Certificate of Incorporation</I></B>&#148;): </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">I, Caesar J. Belbel, Chief Operating Officer, Executive Vice President and Chief Legal Officer of ZIOPHARM Oncology, Inc. (the
&#147;<B><I>Corporation</I></B>&#148;), organized and existing under the General Corporation Law of the State of Delaware, in accordance with the provisions of Section&nbsp;103 thereof, DO HEREBY CERTIFY: </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">That pursuant to the authority conferred upon the Board of Directors of the Corporation (the &#147;<B><I>Board</I></B>&#148;) by Article 4 of
the Certificate of Incorporation, the Board on June 28, 2016 adopted the following resolution creating a series of 250,000 shares of Preferred Stock designated as &#147;Series 1 Preferred Stock&#148;: </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">&#147;<B>R<SMALL>ESOLVED</SMALL></B><SMALL></SMALL>, that pursuant to the authority vested in the Board in accordance with the provisions of
Article 4 of the Certificate of Incorporation, a series of Preferred Stock of the Corporation be, and it hereby is, created, and that the designation and amount thereof and the voting powers, preferences and relative, participating, optional and
other special rights of the shares of each such series, and the qualifications, limitations or restrictions thereof are as follows: </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>A.</B> 250,000 of the authorized shares of the Corporation&#146;s preferred stock, par value $0.001 per share (the &#147;<B><I>Preferred
Stock</I></B>&#148;) are hereby designated &#147;Series 1 Preferred Stock&#148; (the &#147;<B><I>Series 1 Preferred</I></B>&#148;). Each share of Series 1 Preferred shall have a stated value equal to $1,200 (subject to appropriate adjustment in the
event of any stock dividend, stock split, combination or other recapitalization with respect to the Series 1 Preferred) (the &#147;<B><I>Stated Value</I></B>&#148;). </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>B.</B> The rights, preferences, privileges, restrictions and other matters relating to the Series 1 Preferred are as follows: </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman"><B>1. D<SMALL>IVIDEND</SMALL> R<SMALL>IGHTS</SMALL>. </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:13%; font-size:10pt; font-family:Times New Roman"><B>a.</B> From and after the date of the issuance of any shares of Series 1 Preferred, dividends at the rate per month of the Series 1
Dividend Rate (as defined below) shall accrue on such shares of Series 1 Preferred (the &#147;<B><I>Series 1 PIK Dividends</I></B>&#148;). The Series 1 PIK Dividends shall accrue on each share of Series 1 Preferred from day to day and shall be paid
monthly in the form of a number of additional shares of Series 1 Preferred equal to the cash value of the Series 1 PIK Dividend on such share that accrued during the preceding month, divided by the Stated Value of such share of Series 1 Preferred,
within 10 days following the end of the preceding calendar month. The payment of the Series 1 PIK Dividend each calendar month shall be mandatory for so long as the Corporation has funds legally available therefor. The &#147;<B><I>Series 1 Dividend
Rate</I></B>&#148; for each share of Series 1 Preferred shall equal: (i) in the event </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">2. </P>


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that such share is <U>not</U> Unconverted Series 1 Preferred (as defined below), (A) $12.00 per month (subject to appropriate adjustment in the event of any stock dividend, stock split,
combination, adjustment in the Stated Value or other recapitalization with respect to the Series 1 Preferred) or (ii) in the event that such share is Unconverted Series 1 Preferred, (A) $24.00 per month (subject to appropriate adjustment in the
event of any stock dividend, stock split, combination, adjustment in the Stated Value or other recapitalization with respect to the Series 1 Preferred).&nbsp;For the avoidance of doubt, Series 1 PIK Dividends shall be paid only in the form of shares
of Series 1 Preferred and not in the form of cash.&nbsp;No fractional shares of Series 1 Preferred shall be issued as a Series 1 PIK Dividend.&nbsp;Whether or not fractional shares would be issuable as Series 1 PIK Dividends shall be determined on
the basis of the total number of shares of Series 1 Preferred to be issued as a Series 1 PIK Dividend to any single holder of Series 1 Preferred based on the total shares of Series 1 Preferred held by such holder immediately prior to the payment of
such Series 1 PIK Dividend.&nbsp;Any fractional shares not paid pursuant to this Section&nbsp;1(a) shall be forfeited. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman"><B>2.</B>
<B>V<SMALL>OTING</SMALL> R<SMALL>IGHTS</SMALL></B><SMALL><B></B></SMALL><B>.</B><B>&nbsp;</B>The holders of Series 1 Preferred have no voting power whatsoever, other than as set forth in Section 2(a) below. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:13%; font-size:10pt; font-family:Times New Roman"><B>a.</B> At any time when shares of Series 1 Preferred are outstanding, the Corporation shall not, either directly or indirectly by
amendment, merger, consolidation or otherwise, do any of the following without (in addition to any other vote required by law or the Certificate of Incorporation) the written consent or affirmative vote of the holders of at least a majority of the
then outstanding shares of Series 1 Preferred (the &#147;<B><I>Requisite Holders</I></B>&#148;), given in writing or by vote at a meeting, consenting or voting (as the case may be) separately as a class, and any such act or transaction entered into
without such consent or vote shall be null and void <I>ab initio</I>, and of no force or effect: </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:17%; font-size:10pt; font-family:Times New Roman"><B>(i)</B> amend, alter or repeal any
provision of the Certificate of Incorporation in a manner that adversely affects the powers, preferences or rights of the Series 1 Preferred in a manner that is more adverse than the effect on any other class or series of the Corporation&#146;s
capital stock; </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:17%; font-size:10pt; font-family:Times New Roman"><B>(ii)</B> (A) create, or authorize the creation of, or issue or obligate itself to issue shares of, any additional
class or series of capital stock unless the same ranks junior or <I>pari passu</I> to the Series 1 Preferred with respect to the distribution of assets on the liquidation, dissolution or winding up of the Corporation, the payment of dividends and
rights of redemption, or (B) reclassify, alter or amend any existing security of the Corporation that is junior or <I>pari passu</I> to the Series 1 Preferred with respect to the distribution of assets on the liquidation, dissolution or winding up
of the Corporation, the payment of dividends or rights of redemption, if such reclassification, alteration or amendment would render such other security senior to the Series 1 Preferred in respect of any such right, preference or privilege; or </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:17%; font-size:10pt; font-family:Times New Roman"><B>(iii)</B> enter into any transaction (or series of related transactions) the effect of which would adversely affect the holders of the
Series 1 Preferred in a manner that is more adverse than the effect on any other class or series of the Corporation&#146;s capital stock; <I>provided</I>; <I>however</I>, that any issuances of the Corporation&#146;s capital stock in connection with
any transaction (or series of related transactions) would not require approval of the Requisite Holders, unless the special rights, preferences, privileges and obligations of the Series 1 Preferred are adversely affected. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">3. </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman"><B>3. C<SMALL>ONVERSION</SMALL> <SMALL>OF</SMALL> S<SMALL>ERIES</SMALL> 1
P<SMALL>REFERRED</SMALL> S<SMALL>HARES</SMALL> <SMALL>INTO</SMALL> C<SMALL>OMMON</SMALL> S<SMALL>TOCK</SMALL>. </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:13%; font-size:10pt; font-family:Times New Roman"><B>a.</B> Subject to
Section 3(f), upon the close of business on the second (2<SUP STYLE="font-size:85%; vertical-align:top">nd</SUP>) business day following the Conversion Event Date (as defined below) (the &#147;<B><I>Mandatory</I></B> <B><I>Conversion
Time</I></B>&#148;), each outstanding share of Series 1 Preferred shall automatically be converted into shares of Common Stock, without the payment of additional consideration by the holder thereof, into such number of fully paid and non-assessable
shares of Common Stock as is determined by dividing the Stated Value of such share of Series 1 Preferred by the Series 1 Conversion Price (as defined below). The &#147;<B><I>Series 1 Conversion Price</I></B>&#148; shall be equal to the volume
weighted average closing price of the Corporation&#146;s Common Stock as reported by the Nasdaq Stock Market, LLC over the 20 trading days ending on the Conversion Event Date. The &#147;<B><I>Conversion Event Date</I></B>&#148; shall be the date
that the first approval in the United States of (i) a ZIOPHARM Product, as defined in and developed under the Exclusive Channel Partner Agreement dated as of January 6, 2011 and as amended from time to time, by and between the Corporation and
Intrexon Corporation, or (ii) a Product, as defined in and developed under the Exclusive Channel Collaboration Agreement dated September 28, 2015 and as amended from time to time, by and between the Corporation and Intrexon Corporation, or (iii) a
Product, as defined in and developed under the License and Collaboration Agreement dated March 27, 2015 and as amended from time to time, by and among Intrexon Corporation, ARES TRADING Trading, S.A. and the Corporation, is publicly announced. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:13%; font-size:10pt; font-family:Times New Roman"><B>b.</B> No fractional shares of Common Stock shall be issued upon conversion of the Series 1 Preferred.&nbsp;In lieu of any fractional
shares to which the holder would otherwise be entitled, the Corporation shall pay cash equal to such fraction multiplied by the fair market value of a share of Common Stock as determined in good faith by the Board.&nbsp;Whether or not fractional
shares would be issuable upon such conversion shall be determined on the basis of the total number of shares of Series 1 Preferred the holder is at the time converting into Common Stock and the aggregate number of shares of Common Stock issuable
upon such conversion. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:13%; font-size:10pt; font-family:Times New Roman"><B>c.</B> All holders of record of shares of Series 1 Preferred shall be sent written notice of the Mandatory
Conversion Time and the place designated for mandatory conversion of all such shares of Series 1 Preferred pursuant to this Section 3.&nbsp;Such notice need not be sent in advance of the occurrence of the Mandatory Conversion Time.&nbsp;Upon receipt
of such notice, each holder of shares of Series 1 Preferred in certificated form shall surrender his, her or its certificate or certificates for all such shares (or, if such holder alleges that such certificate has been lost, stolen or destroyed, a
lost certificate affidavit and agreement reasonably acceptable to the Corporation to indemnify the Corporation against any claim that may be made against the Corporation on account of the alleged loss, theft or destruction of such certificate) to
the Corporation at the place designated in such notice.&nbsp;If so required by the Corporation, any certificates surrendered for conversion shall be endorsed or accompanied by written instrument or instruments of transfer, in form satisfactory to
the Corporation, duly executed by the registered holder or by his, her or its attorney duly authorized in writing.&nbsp;All rights with respect to the Series 1 Preferred converted pursuant to Section 3(a), including the rights, if any, to receive
the Series 1 PIK Dividends, notices and vote (other than as a holder of Common Stock), </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">4. </P>


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will terminate at the Mandatory Conversion Time (notwithstanding the failure of the holder or holders thereof to surrender any certificates at or prior to such time), except only the rights of
the holders thereof, upon surrender of any certificate or certificates of such holders (or lost certificate affidavit and agreement) therefor, to receive the items provided for in the next sentence of this Section 3(c) (though for the avoidance of
doubt this sentence shall not apply to Unconverted Series 1 Preferred unless and until such Unconverted Series 1 Preferred is converted).&nbsp;As soon as practicable after the Mandatory Conversion Time and, if applicable, the surrender of any
certificate or certificates (or lost certificate affidavit and agreement) for Series 1 Preferred, the Corporation shall (i) deliver, or cause to be delivered, to the converting holder a certificate or book-entry statement representing the number of
full shares of Common Stock issuable on such conversion in accordance with the provisions hereof and (ii) pay cash as provided in Section&nbsp;3(b) in lieu of any fraction of a share of Common Stock otherwise issuable upon such conversion.&nbsp;Such
converted Series 1 Preferred shall be retired and cancelled and may not be reissued as shares of such series, and the Corporation may thereafter take such appropriate action (without the need for stockholder action) as may be necessary to reduce the
authorized number of shares of Series 1 Preferred accordingly. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:13%; font-size:10pt; font-family:Times New Roman"><B>d.</B> The Corporation shall at all times when the Series 1 Preferred
shall be outstanding, reserve and keep available out of its authorized but unissued capital stock, for the purpose of effecting the conversion of the Series 1 Preferred, such number of its duly authorized shares of Common Stock as shall from time to
time be sufficient to effect the conversion of all outstanding Series 1 Preferred; and if at any time the number of authorized but unissued shares of Common Stock shall not be sufficient to effect the conversion of all then outstanding shares of the
Series 1 Preferred, the Corporation shall take such corporate action as may be necessary to increase its authorized but unissued shares of Common Stock to such number of shares as shall be sufficient for such purposes, including, without limitation,
engaging in commercially reasonable efforts to obtain the requisite stockholder approval of any necessary amendment to the Certificate of Incorporation. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:13%; font-size:10pt; font-family:Times New Roman"><B>e.</B> The Corporation shall pay any and all issue and other similar taxes that may be payable in respect of any issuance or delivery of
shares of Common Stock upon conversion of shares of Series 1 Preferred pursuant to this Section&nbsp;3.&nbsp;The Corporation shall not, however, be required to pay any tax which may be payable in respect of any transfer involved in the issuance and
delivery of shares of Common Stock in a name other than that in which the shares of Series 1 Preferred so converted were registered, and no such issuance or delivery shall be made unless and until the person or entity requesting such issuance has
paid to the Corporation the amount of any such tax or has established, to the satisfaction of the Corporation, that such tax has been paid. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:13%; font-size:10pt; font-family:Times New Roman"><B>f.</B> The Corporation shall not effect any conversion of the Series 1 Preferred into Common Stock pursuant to Section 3(a) to the extent
that the number of shares of Common Stock issued in such conversion would represent a number of shares in excess of the Conversion Limitation (as defined below), unless prior to such conversion, stockholder approval for such issuances have been
obtained in accordance with and to the extent required by the NASDAQ Stock Market Listing Rules (such approval, the &#147;<B><I>Conversion Approval</I></B>&#148;). In the event that the limitation provided in the preceding sentence applies, then on
the Mandatory Conversion Date, the Corporation shall convert the maximum number of shares of Series 1 Preferred into </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">5. </P>


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Common Stock as is possible without exceeding the Conversion Limitation. Any shares of Series 1 Preferred that are not converted on the Mandatory Conversion Date (such shares of Series 1
Preferred remaining outstanding after the Mandatory Conversion Time are referred to as &#147;<B><I>Unconverted Series 1 Preferred</I></B>&#148;) shall remain outstanding until the Conversion Approval is obtained, at which point all Unconverted
Series 1 Preferred shall be converted into Common Stock at the Series 1 Conversion Price as provided in this Section&nbsp;3. The &#147;<B><I>Conversion Limitation</I></B>&#148; shall be 19.9% of the lesser of (i) the number of outstanding shares of
the Corporation&#146;s Common Stock immediately prior to the closing of the transactions contemplated by that certain Share Issuance Agreement by and between the Corporation and Intrexon corporation dated on or about the date hereof or (ii) the
number of outstanding shares of Corporation&#146;s Common Stock at the time of conversion. The provisions of this paragraph shall be construed and implemented in a manner otherwise than in strict conformity with the terms of this Section&nbsp;3(f)
to correct this paragraph (or any portion hereof) which may be defective or inconsistent with the intended Conversion Limitation contained herein or to make changes or supplements necessary or desirable to properly give effect to such limitation.
</P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman"><B>4. L<SMALL>IQUIDATION</SMALL>. </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:13%; font-size:10pt; font-family:Times New Roman"><B>a.</B> Each of the following events shall be considered a &#147;<B><I>Deemed Liquidation Event</I></B>&#148;: </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:17%; font-size:10pt; font-family:Times New Roman"><B>(i)</B> a merger or consolidation in which (A) the Corporation is a constituent party or (B) a subsidiary of the Corporation is a
constituent party and the Corporation issues shares of its capital stock pursuant to such merger or consolidation, except any such merger or consolidation involving the Corporation or a subsidiary in which the shares of capital stock of the
Corporation outstanding immediately prior to such merger or consolidation continue to represent, or are converted into or exchanged for shares of capital stock that represent, immediately following such merger or consolidation, at least a majority,
by voting power, of the capital stock of (1) the surviving or resulting entity; or (2) if the surviving or resulting entity is a wholly owned subsidiary of another entity immediately following such merger or consolidation, the parent entity of such
surviving or resulting entity; or </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:17%; font-size:10pt; font-family:Times New Roman"><B>(ii)</B> the sale, lease, transfer, exclusive license or other disposition, in a single transaction
or series of related transactions, by the Corporation or any subsidiary of the Corporation of all or substantially all the assets of the Corporation and its subsidiaries taken as a whole, or the sale or disposition (whether by merger, consolidation
or otherwise) of one or more subsidiaries of the Corporation if substantially all of the assets of the Corporation and its subsidiaries taken as a whole are held by such subsidiary or subsidiaries, except where such sale, lease, transfer, exclusive
license or other disposition is to a wholly owned subsidiary of the Corporation; or </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:17%; font-size:10pt; font-family:Times New Roman"><B>(iii)</B> the closing of the transfer of this
Corporation&#146;s capital stock (whether by merger, consolidation or otherwise), in one transaction or a series of related transactions, to a person or group of affiliated persons (other than an underwriter of this Corporation&#146;s securities),
if, after such closing, such person or group of affiliated persons would hold at least a majority, by voting power, of the capital stock of (1) the surviving or resulting entity; or (2) if the surviving or resulting entity is a wholly owned
subsidiary of another entity immediately following such merger or consolidation, the parent entity of such surviving or resulting entity. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">6. </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:13%; font-size:10pt; font-family:Times New Roman"><B>b.</B> In the event of any voluntary or involuntary liquidation, dissolution or winding up of
the Corporation or Deemed Liquidation Event, the assets of the Corporation available for distribution to its stockholders shall be distributed among the holders of the shares of Series 1 Preferred and Common Stock, pro rata based on the number of
shares held by each such holder, treating for this purpose all shares of Series 1 Preferred as if they had been converted into such number of fully paid and non-assessable shares of Common Stock as is determined by dividing the Stated Value of such
share of Series 1 Preferred by the Series 1 Liquidation Assumed Conversion Price (as defined below), rounded down to the nearest whole share. The amount per share payable to the Series 1 Preferred pursuant to the preceding sentence is referred to as
the &#147;<B><I>Series 1 Liquidation Amount</I></B>.&#148; The &#147;<B><I>Series 1 Liquidation Assumed Conversion Price</I></B>&#148; shall be equal to either (i) if such shares of Series 1 Preferred are <U>not</U> Unconverted Series 1 Preferred,
the volume weighted average closing price of the Corporation&#146;s Common Stock as reported by the Nasdaq Stock Market, LLC over the 20 trading days ending on the public announcement of such voluntary or involuntary liquidation, dissolution or
winding up of the Corporation or Deemed Liquidation Event or (ii) if such shares of Series 1 Preferred are Unconverted Series 1 Preferred, the Series 1 Conversion Price. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:13%; font-size:10pt; font-family:Times New Roman"><B>c.</B> In connection with or following a Deemed Liquidation Event, the Corporation may, in lieu of distributing the proceeds of such
Deemed Liquidation Event pro rata among the holders of Series 1 Preferred and Common Stock as contemplated by Section&nbsp;4(b), elect to redeem all, but not less than all of the Series 1 Preferred then outstanding at a price per share of Series 1
Preferred equal to the Series 1 Liquidation Amount.&nbsp;A redemption of the Series 1 Preferred pursuant to this Section 4(c) shall occur upon the closing of such Deemed Liquidation Event or on such other date determined by the Corporation during
the period commencing on the date of the closing of such Deemed Liquidation Event and ending on the 20<SUP STYLE="font-size:85%; vertical-align:top">th</SUP> day following such Deemed Liquidation Event (such date, the &#147;<B><I>Redemption
Date</I></B>&#148;) and shall be effected in accordance with Subsections 4(c)(i) through 4(c)(iii): </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:17%; font-size:10pt; font-family:Times New Roman"><B>(i)</B> The Corporation shall
send written notice of the redemption (the &#147;<B><I>Redemption Notice</I></B>&#148;) to each holder of record of Series 1 Preferred not less than 5 days prior to the Redemption Date. Each Redemption Notice shall state: (A) the number of shares of
Series 1 Preferred held by such holder that the Corporation shall redeem on the Redemption Date specified in the Redemption Notice; (B) the Redemption Date and the Series 1 Liquidation Amount payable for such holder&#146;s shares of Series 1
Preferred; and (C) that the holder is to surrender to the Corporation, in the manner and at the place designated in the Redemption Notice, his, her or its certificate or certificates, if any, representing the shares of Series 1 Preferred to be
redeemed. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:17%; font-size:10pt; font-family:Times New Roman"><B>(ii)</B> On or before the Redemption Date, each holder of shares of Series 1 Preferred to be redeemed on the Redemption
Date shall surrender the certificate or certificates, if any, representing such shares (or, if such registered holder alleges that such certificate has been lost, stolen or destroyed, a lost certificate affidavit and agreement reasonably acceptable
to the Corporation to indemnify the Corporation against any claim that may be made against the Corporation on account of the alleged loss, theft or destruction of such certificate) to </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">7. </P>


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the Corporation, in the manner and at the place designated in the Redemption Notice, and thereupon the Series 1 Liquidation Amount, for such shares shall be payable to the order of the person
whose name appears on such certificate or certificates as the owner thereof. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:17%; font-size:10pt; font-family:Times New Roman"><B>(iii)</B> If the Redemption Notice shall have been duly
given, and if on the Redemption Date the Series 1 Liquidation Amount, payable upon redemption of the shares of Series 1 Preferred to be redeemed on the Redemption Date is paid or tendered for payment or deposited with an independent payment agent so
as to be available therefor in a timely manner, then notwithstanding that the certificates, if any, evidencing any of the shares of Series 1 Preferred so called for redemption shall not have been surrendered, all rights with respect to such shares
of Series 1 Preferred shall forthwith after the Redemption Date terminate, except only the right of the holders to receive the Series 1 Liquidation Amount, without interest, upon surrender of their certificate or certificates therefor. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman"><B>5.</B> <B>R<SMALL>EDEEMED</SMALL> <SMALL>OR</SMALL> O<SMALL>THERWISE</SMALL> A<SMALL>CQUIRED</SMALL> S<SMALL>HARES</SMALL>. </B>Any shares
of Series 1 Preferred that are redeemed or otherwise acquired by the Corporation or any of its subsidiaries shall be automatically and immediately cancelled and retired and shall not be reissued, sold or transferred.&nbsp;Neither the Corporation nor
any of its subsidiaries may exercise any voting or other rights granted to the holders of Series 1 Preferred following redemption. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman"><B>6.</B> <B>W<SMALL>AIVER</SMALL>. </B>Any of the rights, powers, preferences and other terms of the Series 1 Preferred set forth herein may
be waived on behalf of all holders of Series 1 Preferred by the affirmative written consent or vote of the Requisite Holders. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:8%; font-size:10pt; font-family:Times New Roman"><B>7.</B>
<B>N<SMALL>EXT</SMALL> B<SMALL>USINESS</SMALL> D<SMALL>AY</SMALL>.</B><B>&nbsp;</B>Whenever any payment or other obligation hereunder shall be due on a day other than a business day, such payment shall be made on the next succeeding business day.
</P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">8. </P>


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 <P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>IN WITNESS WHEREOF,</B> ZIOPHARM Oncology, Inc. has caused this Certificate of Designation,
Preferences and Rights of the Terms of the Series 1 Preferred Stock to be executed by its Chief Operating Officer, Executive Vice President and Chief Legal Officer this 29<SUP STYLE="font-size:85%; vertical-align:top">th</SUP> day of June, 2016.
</P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><DIV ALIGN="right">
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<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Caesar J. Belbel</P></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Caesar J. Belbel</TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Chief Operating Officer, Executive Vice President and Chief Legal Officer</TD></TR>
</TABLE></DIV>

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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Exhibit B </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B><U>&#147;BAD ACTOR&#148; QUESTIONNAIRE FORMS </U></B></P>

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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>ZIOPHARM ONCOLOGY, INC. </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>CONFIDENTIAL Rule 506 Disqualification Event Questionnaire (&#147;</B><B><I>Individual</I></B><B>&#148;) </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>C<SMALL>OMPLETED</SMALL> <SMALL>ON</SMALL> B<SMALL>EHALF</SMALL> <SMALL>OF</SMALL></B><B><I><SMALL></SMALL>:</I></B><B>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">This
questionnaire is being furnished to you to obtain information in connection with a potential offering (the &#147;<B><I>Offering</I></B>&#148;) of securities under Rule 506 of the Securities Act of 1933 (the &#147;<B><I>Securities Act</I></B>&#148;).
As used in this questionnaire, &#147;<B><I>you</I></B>&#148; also refers to any entity on whose behalf you are responding. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Please review
Exhibit A and confirm that you can make all of the statements on behalf of yourself, as well as any entity that you control, directly or indirectly. If you cannot make one or more of the statements, please contact us to provide details.&nbsp;If you
have doubts regarding whether you can make all of the statements, please contact us. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">By completing and signing this questionnaire, you
also indicate:&nbsp;(i)&nbsp;your consent for Cooley LLP and its clients to rely upon the information provided; (ii)&nbsp;your agreement to promptly notify Cooley LLP and the Issuer of securities of any changes in information provided that occurs
after the date you sign the questionnaire and prior to the applicable offering of securities; and (iii)&nbsp;your confirmation that the statements on Exhibit A are true and correct, to the best of your knowledge and belief after a reasonable
investigation, as of the date you sign the questionnaire, as they pertain to you and to any entity that you control.<SUP STYLE="font-size:85%; vertical-align:top">1</SUP> </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Please return this Questionnaire to Cooley LLP, Attn: Christopher Gerry, by e-mail to
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.&nbsp;If you have any questions with respect to these matters, please contact Chris at
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; or &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .
</P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>The statements on Exhibit A are true and correct to the best of my knowledge, information and belief after a reasonable investigation as of the date
below. </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">&nbsp;</P></TD></TR>
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<TD VALIGN="top" COLSPAN="3" ALIGN="center">Date</TD>
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<TD VALIGN="top">(Signature)</TD></TR>
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<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">&nbsp;</P></TD></TR>
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<TD VALIGN="top">Title (if applicable)</TD></TR>
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<TD VALIGN="top">Address:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">&nbsp;</P></TD>
<TD VALIGN="bottom">&nbsp;</TD>
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<TD VALIGN="top" COLSPAN="3"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">&nbsp;</P></TD>
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</TABLE> <P STYLE="line-height:8.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000;width:10%">&nbsp;</P>
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<TR>
<TD WIDTH="2%" VALIGN="top" ALIGN="left"><SUP STYLE="font-size:85%; vertical-align:top">1</SUP>&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">While the SEC has not provided specific guidance as to what they mean by &#147;control&#148; in this context, in other contexts the SEC has determined that <I>control </I>means the possession, direct or indirect, of the
power to direct or cause the direction of the management and policies of a person, whether through the ownership of voting securities, by contract, or otherwise. </TD></TR></TABLE>

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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Exhibit A </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>1.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>Criminal Convictions. </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">You have not been convicted, within ten years before the sale of
the securities (or five years, in the case of issuers, their predecessors and affiliated issuers), of any felony or misdemeanor: </P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">in connection with the purchase or sale of any security; </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">involving the making of any false filing with the SEC; or </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">arising out of the conduct of the business of an underwriter, broker, dealer, municipal securities dealer, investment advisor or paid solicitor of purchasers of securities. </TD></TR></TABLE>
<P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>2.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>Court Orders, Injunctions and Decrees. </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">Your are not subject to any order, judgment or
decree of any court of competent jurisdiction, entered within five years before the sale of the securities, that, at the time of such sale, restrains or enjoins you from engaging or continuing to engage in any conduct or practice: </P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">in connection with the purchase or sale of any security; </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">involving the making of any false filing with the SEC; or </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">arising out of the conduct of the business of an underwriter, broker, dealer, municipal securities dealer, investment adviser or paid solicitor of purchasers of securities. </TD></TR></TABLE>
<P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>3.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>Final Orders from Specified State or Federal Regulators. </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">You are not subject to a final
order of a state securities commission (or an agency of officer of a state performing similar functions); a state authority that supervises or examines banks, savings associations, or credit unions; a state insurance commission (or an agency or
officer of a state performing similar functions); an appropriate federal banking agency; the Commodity Futures Trading Commission; or the National Credit Union Administration that: </P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TR>
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">at the time of the sale of the securities, bars you from: </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="14%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">association with an entity regulated by such commission, authority, agency or officer; </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="14%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">engaging in the business of securities, insurance or banking; or </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TR>
<TD WIDTH="14%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">engaging in savings association or credit union activities; or </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">constitutes a final order based on a violation of any law or regulation that prohibits fraudulent, manipulative, or deceptive conduct entered within ten years before the sale of the securities. </TD></TR></TABLE>
<P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>4.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>SEC Disciplinary Orders. </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">You are not subject to an order of the SEC entered pursuant to
section 15(b) or 15B(c) of the Securities Exchange Act of 1934 (the &#147;Exchange Act&#148;) or section 203(e) or 203(f) of the Investment Advisers Act of 1940 (the &#147;Advisers Act&#148;) that, at the time of the sale of the securities: </P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TR>
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">suspends or revokes your registration as a broker, dealer, municipal securities dealer or investment adviser; </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">places limitations on the activities, functions or operations of, or imposes civil money penalties on, such person; or </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">bars you from being associated with any entity or from participating in the offering of any penny stock. </TD></TR></TABLE>

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<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>5.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>SEC Cease and Desist Orders. </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">You are not subject to any order of the SEC, entered
within five years before the sale of the securities, that, at the time of such sale, orders you to cease and desist from committing or causing a future violation of: </P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">any scienter-based anti-fraud provision of the federal securities laws, including, but not limited to, Section 17(a)(1) of the Securities Act, Section 10(b) of the Exchange Act and Rule 10b-5 thereunder, and Section
206(1) of the Advisers Act or any other rule or regulation thereunder; or </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">Section 5 of the Securities Act. </TD></TR></TABLE> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">6.</TD>
<TD ALIGN="left" VALIGN="top"><B>Suspension or Expulsion from SRO Membership or Association with an SRO Member</B><B>.</B> </TD></TR></TABLE>
<P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">You have not been suspended or expelled from membership in, or suspended or barred from association with a member of, a securities
self-regulatory organization (e.g., a registered national securities exchange or a registered national or affiliated securities association) for any act or omission to act constituting conduct inconsistent with just and equitable principles of
trade. </P> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>7.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>SEC Refusal or Stop Order. </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">You have not filed (as a registrant or issuer), nor were you
named as an underwriter in any registration statement or Regulation A offering statement filed with the SEC that, within five years before the sale of the securities, was the subject of a refusal order, stop order, or order suspending the Regulation
A exemption, or is, at the time of the sale of the securities, the subject of an investigation or proceeding to determine whether a stop order or suspension order should be issued. </P>
<P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>8.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>U.S. Postal Service False Representation Orders. </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">You are not subject to a United States
Postal Service false representation order entered within five years before the sale of the securities, nor are you, at the time of the sale of the securities, subject to a temporary restraining order or preliminary injunction with respect to conduct
alleged by the United States Postal Service to constitute a scheme or device for obtaining money or property through the mail by means of false representations. </P> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>9.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>Commission-based Solicitors. </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">You are not aware of any person or entity, other than any
person or entity engaged directly by the issuer, entitled (directly or indirectly) to receive any remuneration in connection with this offering other than as identified by you in writing to the issuer&#146;s outside corporate counsel within the 20
days prior to the consummation of the offering. </P>

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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>ZIOPHARM ONCOLOGY, INC. </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>CONFIDENTIAL Rule 506 Disqualification Event Questionnaire (&#147;</B><B><I>Entity</I></B><B>&#148;) </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>C<SMALL>OMPLETED</SMALL> <SMALL>ON</SMALL> B<SMALL>EHALF</SMALL> <SMALL>OF</SMALL></B><B><I><SMALL></SMALL>:</I></B><B></B><B><I> </I></B><B>INTREXON
CORPORATION </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center> <P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">This questionnaire is being furnished to you to obtain information in connection with a potential offering (the
&#147;<B><I>Offering</I></B>&#148;) of securities under Rule 506 of the Securities Act of 1933 (the &#147;<B><I>Securities Act</I></B>&#148;). As used in this questionnaire, &#147;<B><I>you</I></B>&#148; refers to any entity on whose behalf you are
responding. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Please review Exhibit A and confirm that you can make all of the statements on behalf of Entity. If you cannot make one or
more of the statements, please contact us to provide details.&nbsp;If you have doubts regarding whether you can make all of the statements, please contact us. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">By completing and signing this questionnaire, you also indicate that:&nbsp;(i)&nbsp;Cooley LLP and its clients may rely upon the information
provided; (ii)&nbsp;you will notify Cooley LLP and the Issuer of securities of any changes in information provided that occurs after the date you sign the questionnaire and prior to the applicable offering of securities; and (iii)&nbsp;the
statements on Exhibit A are true and correct, to the best of your knowledge and belief after a reasonable investigation, as of the date you sign the questionnaire. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Please return this Questionnaire to Cooley LLP, Attn: Christopher Gerry, by e-mail to
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.&nbsp;If you have any questions with respect to these matters, please contact Chris at
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>The statements on Exhibit A
are true and correct to the best of my knowledge, information and belief after a reasonable investigation as of the date below. </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><DIV ALIGN="right">
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="40%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt">


<TR>
<TD WIDTH="12%"></TD>
<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="87%"></TD></TR>


<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" COLSPAN="3"><B>INTREXON CORPORATION</B></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">By:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">&nbsp;</P></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Name:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">&nbsp;</P></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Title:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">&nbsp;</P></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">Date:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">&nbsp;</P></TD></TR>
</TABLE></DIV>

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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Exhibit A </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>1.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>Criminal Convictions. </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">You have not been convicted, within ten years before the sale of
the securities (or five years, in the case of issuers, their predecessors and Affiliated Issuers), of any felony or misdemeanor: </P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="9%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">in connection with the purchase or sale of any security; </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="9%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">involving the making of any false filing with the SEC; or </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="9%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">arising out of the conduct of the business of an underwriter, broker, dealer, municipal securities dealer, investment advisor or paid solicitor of purchasers of securities. </TD></TR></TABLE>
<P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>2.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>Court Orders, Injunctions and Decrees. </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">You are not subject to any order, judgment or
decree of any court of competent jurisdiction, entered within five years before the sale of the securities, that, at the time of such sale, restrains or enjoins Entity from engaging or continuing to engage in any conduct or practice: </P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="9%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">in connection with the purchase or sale of any security; </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="9%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">involving the making of any false filing with the SEC; or </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="9%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">arising out of the conduct of the business of an underwriter, broker, dealer, municipal securities dealer, investment adviser or paid solicitor of purchasers of securities. </TD></TR></TABLE>
<P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>3.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>Final Orders from Specified State or Federal Regulators. </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">You are not subject to a final
order of a state securities commission (or an agency of officer of a state performing similar functions); a state authority that supervises or examines banks, savings associations, or credit unions; a state insurance commission (or an agency or
officer of a state performing similar functions); an appropriate federal banking agency; the Commodity Futures Trading Commission; or the National Credit Union Administration that: </P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="9%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">at the time of the sale of the securities, bars Entity from: </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="14%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">association with an entity regulated by such commission, authority, agency or officer; </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="14%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">engaging in the business of securities, insurance or banking; or </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="14%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">engaging in savings association or credit union activities; or </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="9%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">constitutes a final order based on a violation of any law or regulation that prohibits fraudulent, manipulative, or deceptive conduct entered within ten years before the sale of the securities. </TD></TR></TABLE>
<P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>4.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>SEC Disciplinary Orders. </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">You are not subject to an order of the SEC entered pursuant to
section 15(b) or 15B(c) of the Securities Exchange Act of 1934 (the &#147;Exchange Act&#148;) or section 203(e) or 203(f) of the Investment Advisers Act of 1940 (the &#147;Advisers Act&#148;) that, at the time of the sale of the securities: </P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="9%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">suspends or revokes Entity&#146;s registration as a broker, dealer, municipal securities dealer or investment adviser; </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="9%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">places limitations on the activities, functions or operations of, or imposes civil money penalties on, such person; or </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="9%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">bars Entity from being associated with any entity or from participating in the offering of any penny stock. </TD></TR></TABLE>

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<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>5.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>SEC Cease and Desist Orders. </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">You are not subject to any order of the SEC, entered
within five years before the sale of the securities, that, at the time of such sale, orders Entity to cease and desist from committing or causing a future violation of: </P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="9%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">any scienter-based anti-fraud provision of the federal securities laws, including, but not limited to, Section 17(a)(1) of the Securities Act, Section 10(b) of the Exchange Act and Rule 10b-5 thereunder, and Section
206(1) of the Advisers Act or any other rule or regulation thereunder; or </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="9%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">Section 5 of the Securities Act. </TD></TR></TABLE> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>6.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>Suspension or Expulsion from SRO Membership or Association with an SRO Member. </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">You have
not been suspended or expelled from membership in, or suspended or barred from association with a member of, a securities self-regulatory organization (e.g., a registered national securities exchange or a registered national or affiliated securities
association) for any act or omission to act constituting conduct inconsistent with just and equitable principles of trade. </P> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>7.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>SEC Refusal or Stop Order. </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">You have not filed (as a registrant or issuer), nor was
Entity named as an underwriter in any registration statement or Regulation A offering statement filed with the SEC that, within five years before the sale of the securities, was the subject of a refusal order, stop order, or order suspending the
Regulation A exemption, or is, at the time of the sale of the securities, the subject of an investigation or proceeding to determine whether a stop order or suspension order should be issued. </P>
<P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>8.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>U.S. Postal Service False Representation Orders </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">You are not subject to a United States
Postal Service false representation order entered within five years before the sale of the securities, nor is Entity, at the time of the sale of the securities, subject to a temporary restraining order or preliminary injunction with respect to
conduct alleged by the United States Postal Service to constitute a scheme or device for obtaining money or property through the mail by means of false representations. </P> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>9.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>Affiliated Issuers </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">If you are controlled by any other entity or if any other entity is
an affiliated issuer of the issuer conducting the Offering as a result of your voting power or beneficial ownership of the issuer conducting the Offering, then you can confirm that each such entity can also make the statements set forth in
paragraphs 1 through 8 above. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; margin-left:8%; font-size:10pt; font-family:Times New Roman"><B>[</B><B><I>If </I></B><B></B><B><I>You </I></B><B></B><B><I>are the issuer in the offering, include the
item below:</I></B><B>] </B></P> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><B>10.</B></TD>
<TD ALIGN="left" VALIGN="top"><B>Other Issuer Covered Persons </B></TD></TR></TABLE> <P STYLE="margin-top:6pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">Entity, the issuer in the offering, has distributed,
collected, and thoroughly reviewed a &#147;Rule 506 Disqualification Questionnaire&#148; from each Other Issuer Covered Person (defined herein). With respect to securities of the issuer to be offered and sold in the offering, each of issuer&#146;s
predecessors (if any), affiliated issuers, directors, executive officers, other officers of the issuer participating in the offering, beneficial owner of 20% or more of the issuer&#146;s outstanding voting equity securities, calculated on the basis
of voting power, promoters (as that term is defined in Rule 405 under the Securities Act) (each, an &#147;<B><I>Other Issuer Covered Person</I></B>&#148; and, together, &#147;<B><I>Other Issuer Covered</I></B>
</P>

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 <P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4%; font-size:10pt; font-family:Times New Roman">
<B><I>Persons</I></B>&#148;) completed such questionnaire and confirmed that the statements on Exhibit A of such Other Issuer Covered Person&#146;s questionnaire is true and correct as of the
date such Other Issuer Covered Person signed the questionnaire. You have no reason to believe, nor has any fact or circumstance come to the attention of the Entity, that (i) any of the Other Issuer Covered Persons incorrectly completed their
questionnaire or (ii) any of the Other Issuer Covered Persons will be unable to make the statements set forth in Exhibit A to their questionnaire prior to the offering of the securities. </P>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Exhibit 99.1 </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:14pt" ALIGN="center">


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<TD WIDTH="50%"></TD>
<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="48%"></TD></TR>


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</TD></TR>
</TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Intrexon and ZIOPHARM Amend Exclusive Channel Collaborations to Improve Alignment as Programs Advance
through Development </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Germantown, MD, and Boston, MA June</B>&nbsp;<B>30, 2016 </B><B>&#150;</B> <U>Intrexon Corporation</U> (NYSE: XON), a leader
in synthetic biology, and <U>ZIOPHARM Oncology, Inc.</U> (Nasdaq: ZIOP), a biopharmaceutical company focused on new cancer immunotherapies, today announced amendments to their Exclusive Channel Collaborations (ECCs) in the fields of oncology and
graft-versus-host-disease (GvHD) to improve alignment between both companies as ZIOPHARM broadens its pipeline and advances multiple therapeutic programs into the clinic.&nbsp;The new structure is intended to facilitate increased investment in
clinical development by ZIOPHARM, including the execution of pivotal studies, across a number of cellular and gene therapies that it employs. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Geno
Germano, President of Intrexon, stated, &#147;Intrexon is engaged in an array of collaborations with a wide variety of partners. Our goal is always to work together to create value for both Intrexon shareholders and the shareholders of our
collaborators. As these relationships mature, business needs and conditions can evolve and create new opportunities. In the case of ZIOPHARM and the tremendous prospects they possess with their cellular and gene based approaches within oncology,
both companies saw an opportunity to adjust the terms of our relationship for mutual benefit.&#148; </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Laurence Cooper, M.D., Ph.D., Chief Executive Officer
of ZIOPHARM Oncology commented, &#147;Intrexon and ZIOPHARM are integral partners, working closely together to create innovative and more efficacious therapies for the treatment of cancer and GvHD toward the ultimate goal of finding cures. By
amending the terms of our collaborations, ZIOPHARM is better positioned to advance its immunotherapy assets from first-in-human trials to eventual commercialization.&#148; </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Under the terms of the amendments: </P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">Operating profit rates payable to Intrexon from ZIOPHARM on products developed under its two existing collaborations will be reduced from 50% to 20%. This reduction will not apply to any royalties or other payments made
with respect to the companies&#146; existing collaboration with Merck Serono, the biopharmaceutical business of Merck KGaA; </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">Economics from any future sublicensing arrangements with potential third party collaborators will remain evenly split; </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">In consideration of the amendments, ZIOPHARM will issue shares of a new class of preferred stock that would carry an initial stated value of $120 million and a monthly dividend of 1% payable in additional preferred
shares; and </TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top">Upon the first approval of a product in the United States or upon certain fundamental transactions, such as a change of control of ZIOPHARM, the preferred shares issued to Intrexon will be converted into ZIOPHARM common
stock equal to the aggregate stated value divided by the volume weighted average closing price of ZIOPHARM&#146;s common stock over the 20 trading days ending on the date that the product approval is announced or such transaction occurs.
</TD></TR></TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Additional details of the agreement can be found in the companies&#146; filings with the U.S. Securities and Exchange Commission. </P>

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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Already with three active trials at leading institutions, two utilizing controlled gene therapy to express a
powerful anti-cancer effector in interleukin-12 and the other incorporating the innovative non-viral <I>Sleeping Beauty</I> gene delivery system in chimeric antigen receptor T cell therapy (CAR-T) for advanced lymphoid malignancies, ZIOPHARM has
positioned itself to meaningfully expand its clinical programs through the remainder of 2016 and over the course of 2017.&nbsp;For the current year these will include viral CAR-T for myeloid malignancies, natural killer (NK) cells for acute myeloid
leukemia, and for the first time a combination approach with Ad-RTS-hIL-12 used in conjunction with checkpoint inhibitors.</P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Additionally, ZIOPHARM and
Intrexon continue to advance preclinical efforts leveraging the <I>Sleeping Beauty</I> platform, the clinical-stage RheoSwitch<SUP STYLE="font-size:85%; vertical-align:top">&reg;</SUP> (RTS<SUP STYLE="font-size:85%; vertical-align:top">&reg;</SUP>),
and cell manufacturing for the clinical applications of T cells engineered to express CAR and TCR, as well as off-the-shelf approaches in NK and other cell types.<U>&nbsp;</U>Employing novel cell engineering techniques and multigenic programs, the
collaboration has progressed next-generation non-viral adoptive cellular therapies based on designer cytokines and CARs under control of RheoSwitch<SUP STYLE="font-size:85%; vertical-align:top">&reg;</SUP> technology targeting both hematologic and
solid tumor malignancies. Many of these initiatives benefit from the companies&#146; ongoing collaboration with The University of Texas MD Anderson Cancer Center, which facilitates a faster and more cost effective approach to move these promising
treatments from the bench to the clinic. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>About Intrexon Corporation </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Intrexon Corporation (NYSE: XON) is Powering the Bioindustrial Revolution with Better DNA&#153; to create biologically-based products that improve the quality
of life and the health of the planet. The Company&#146;s integrated technology suite provides its partners across diverse markets with industrial-scale design and development of complex biological systems delivering unprecedented control, quality,
function, and performance of living cells. We call our synthetic biology approach Better DNA<SUP STYLE="font-size:85%; vertical-align:top">&reg;</SUP>, and we invite you to discover more at <U>www.dna.com</U> or follow us on Twitter at
<U>@Intrexon</U>. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>About ZIOPHARM Oncology, Inc. </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">ZIOPHARM Oncology is a Boston, Massachusetts-based biotechnology company employing novel gene expression, control and cell technologies to deliver safe,
effective and scalable cell- and viral-based therapies for the treatment of cancer. The Company&#146;s immuno-oncology programs, in collaboration with Intrexon Corporation (NYSE: XON) and the MD Anderson Cancer Center, include chimeric antigen
receptor T cell (CAR-T) and other adoptive cell-based approaches that use non-viral gene transfer methods for broad scalability. The Company is advancing programs in multiple stages of development together with Intrexon Corporation&#146;s RheoSwitch
Therapeutic System<SUP STYLE="font-size:85%; vertical-align:top">&reg;</SUP> technology, a switch to turn on and off, and precisely modulate, gene expression in order to improve therapeutic index. The Company&#146;s pipeline includes a number of
cell-based therapeutics in both clinical and preclinical testing which are focused on hematologic and solid tumor malignancies. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Trademarks </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Intrexon, Powering the Bioindustrial Revolution with Better DNA, and Better DNA are trademarks of Intrexon and/or its affiliates. Other names may be trademarks
of their respective owners. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Safe Harbor Statement </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Some of the statements made in this press release are forward-looking statements. These forward-looking statements are based upon our current expectations and
projections about future events and generally relate to our plans, objectives and expectations for the development of our business. Although management believes that the plans and objectives reflected in or suggested by these forward-looking
statements are reasonable, all forward-looking statements involve risks and uncertainties and actual future results may be materially different from the plans, objectives and expectations expressed in this press release. </P>

<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>For more information, contact: </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Intrexon Corporation </B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Investor Contact: </P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Christopher Basta </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Vice President, Investor Relations </P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Tel: +1 (561) 410-7052<U> </U></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><U></U><U>investors@intrexon.com
</U> </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Corporate Contact: </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Marie Rossi, Ph.D. <U> </U></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Senior Manager, Technical Communications<U> </U></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Tel: +1 (301)
556-9850<U> </U></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><U></U><U>publicrelations@intrexon.com </U> </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>ZIOPHARM: </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Corporate Contact: </P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Lori Ann Occhiogrosso </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">ZIOPHARM Oncology, Inc. </P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">617-259-1987 </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><U>locchiogrosso@ziopharm.com</U> </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Investor Contact: </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">David Pitts </P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Argot Partners </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">212-600-1902 </P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><U>david@argotpartners.com</U> </P>
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