<SEC-DOCUMENT>0001206774-14-001802.txt : 20140528
<SEC-HEADER>0001206774-14-001802.hdr.sgml : 20140528
<ACCEPTANCE-DATETIME>20140528171817
ACCESSION NUMBER:		0001206774-14-001802
CONFORMED SUBMISSION TYPE:	SC 13D/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20140528
DATE AS OF CHANGE:		20140528

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Asterias Biotherapeutics, Inc.
		CENTRAL INDEX KEY:			0001572552
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				461047971
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-87639
		FILM NUMBER:		14873588

	BUSINESS ADDRESS:	
		STREET 1:		230 CONSTITUTION DRIVE
		CITY:			MENLO PARK
		STATE:			CA
		ZIP:			94025
		BUSINESS PHONE:		510-521-3390

	MAIL ADDRESS:	
		STREET 1:		230 CONSTITUTION DRIVE
		CITY:			MENLO PARK
		STATE:			CA
		ZIP:			94025

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GERON CORP
		CENTRAL INDEX KEY:			0000886744
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				752287752
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A

	BUSINESS ADDRESS:	
		STREET 1:		149 COMMONWEALTH DRIVE
		STREET 2:		SUITE 2070
		CITY:			MENLO PARK
		STATE:			CA
		ZIP:			94025
		BUSINESS PHONE:		6504737700

	MAIL ADDRESS:	
		STREET 1:		149 COMMONWEALTH DRIVE
		STREET 2:		SUITE 2070
		CITY:			MENLO PARK
		STATE:			CA
		ZIP:			94025

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GERON CORPORATION
		DATE OF NAME CHANGE:	19960521
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D/A
<SEQUENCE>1
<FILENAME>geron_sc13da.htm
<DESCRIPTION>AMENDMENT TO SCHEDULE FILED TO REPORT ACQUISITION OF BENEFICIAL OWNERSHIP
<TEXT>

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<P align=center><B><FONT face="Times New Roman">UNITED STATES
<BR></FONT></B><B><FONT face="Times New Roman">SECURITIES AND EXCHANGE
COMMISSION <BR>Washington, D.C. 20549 </FONT></B></P>
<P align=center><B><FONT face="Times New Roman">_____________ </FONT></B></P>
<P align=center><B><FONT face="Times New Roman" size=4>SCHEDULE
13D/A</FONT></B><B><FONT face="Times New Roman"> </FONT></B></P>
<P align=center><B><FONT face="Times New Roman">Under the Securities Exchange
Act of 1934 <BR>(Amendment No. 1)* </FONT></B></P>
<TABLE style="LINE-HEIGHT: 14pt; BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width="100%" border=0>

  <TR vAlign=bottom>
    <TD style="BORDER-BOTTOM: #000000 1pt solid; TEXT-ALIGN: center" noWrap width="100%"><FONT face="Times New Roman" size=2>Asterias Biotherapeutics,
      Inc.</FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="TEXT-ALIGN: center" width="100%"><FONT face="Times New Roman" size=2>(Name of Issuer)</FONT></TD></TR></TABLE><BR>
<TABLE style="LINE-HEIGHT: 14pt; BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width="100%" border=0>

  <TR vAlign=bottom>
    <TD style="BORDER-BOTTOM: #000000 1pt solid; TEXT-ALIGN: center" noWrap width="100%"><FONT face="Times New Roman" size=2>Series A Common Stock,
      par value $0.0001 per share</FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="TEXT-ALIGN: center" width="100%"><FONT face="Times New Roman" size=2>(Title of Class of Securities)</FONT></TD></TR></TABLE><BR>
<TABLE style="LINE-HEIGHT: 14pt; BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width="100%" border=0>

  <TR vAlign=bottom>
    <TD style="BORDER-BOTTOM: #000000 1pt solid; TEXT-ALIGN: center" noWrap width="100%"><FONT face="Times New Roman" size=2>04624N 107</FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="TEXT-ALIGN: center" width="100%"><FONT face="Times New Roman" size=2>(CUSIP Number)</FONT></TD></TR></TABLE>
<P align=center><FONT face="Times New Roman" size=2>Geron Corporation <BR>Olivia
K. Bloom <BR></FONT><FONT face="Times New Roman" size=2>Executive Vice
President, Finance, Chief Financial Officer and Treasurer<BR>149 Commonwealth
Drive, Suite 2070 <BR>Menlo Park, California 94025 <BR>(650) 473-7700
</FONT></P>
<P align=center><FONT face="Times New Roman" size=2>Copies To: </FONT></P>
<TABLE style="BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width="100%" border=0>

  <TR vAlign=bottom>
    <TD style="TEXT-ALIGN: center" noWrap width="99%"><FONT face="Times New Roman" size=2>Chadwick L. Mills</FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="TEXT-ALIGN: center" width="99%"><FONT face="Times New Roman" size=2>Cooley LLP</FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="TEXT-ALIGN: center" width="99%"><FONT face="Times New Roman" size=2>3175 Hanover Street</FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="TEXT-ALIGN: center" width="99%"><FONT face="Times New Roman" size=2>Palo Alto, California 94304</FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="WIDTH: 99%; TEXT-ALIGN: center" noWrap width="99%"><FONT face="Times New Roman" size=2></FONT><FONT face="Times New Roman" size=2>(650) 843-5000</FONT></TD></TR></TABLE>
<TABLE style="BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width="100%" border=0>

  <TR vAlign=bottom>
    <TD style="BORDER-TOP: black 1pt solid; WIDTH: 99%; TEXT-ALIGN: center" noWrap width="99%"><FONT face="Times New Roman" size=2>(Name, Address and
      Telephone Number of Person</FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="TEXT-ALIGN: center" noWrap width="99%"><FONT face="Times New Roman" size=2>Authorized to Receive Notices and
      Communications)</FONT></TD></TR></TABLE><BR>
<TABLE style="LINE-HEIGHT: 14pt; BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width="100%" border=0>

  <TR vAlign=bottom>
    <TD style="BORDER-BOTTOM: #000000 1pt solid; TEXT-ALIGN: center" width="100%"><FONT face="Times New Roman" size=2>May 28, 2014</FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="TEXT-ALIGN: center" noWrap width="100%"><FONT face="Times New Roman" size=2>(Date of Event which Requires Filing of this
      Statement)</FONT></TD></TR></TABLE><BR>
<P align=left><FONT face="Times New Roman" size=2>If the filing person has
previously filed a statement on Schedule 13G to report the acquisition that is
the subject of this Schedule 13D, and is filing this schedule because of Rule
13d-1(e), 13d-1(f) or 13d-1(g), check the following box __. </FONT></P>
<P align=left><B><FONT face="Times New Roman" size=2>Note: </FONT></B><FONT face="Times New Roman" size=2>Schedules filed in paper format shall include a
signed original and five copies of the schedule, including all exhibits. See
Rule 13d-7 for other parties to whom copies are to be sent. </FONT></P>
<P align=left><FONT face="Times New Roman" size=2>*The remainder of this cover
page shall be filled out for a reporting person&#146;s initial filing on this form
with respect to the subject class of securities, and for any subsequent
amendment containing information which would alter disclosures provided in a
prior cover page.</FONT></P>
<P align=left><FONT face="Times New Roman" size=2>The information required on
the remainder of this cover page shall not be deemed to be "filed" for the
purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or
otherwise subject to the liabilities of that section of the Act but shall be
subject to all other provisions of the Act (however, see the Notes).</FONT></P>
<HR align=center width="100%" noShade SIZE=2>

<DIV style="PAGE-BREAK-BEFORE: always"></DIV><BR>
<P align=center><B><FONT face="Times New Roman">SCHEDULE 13D/A</FONT></B><FONT face="Times New Roman"> </FONT></P>
<P align=left><B><FONT style="BORDER-RIGHT: #000000 1pt solid; PADDING-RIGHT: 2pt; BORDER-TOP: #000000 1pt solid; PADDING-LEFT: 2pt; PADDING-BOTTOM: 2pt; BORDER-LEFT: #000000 1pt solid; PADDING-TOP: 2pt; BORDER-BOTTOM: #000000 1pt solid" face="Times New Roman" size=2>CUSIP No. 04624N
107&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT></B></P>
<TABLE style="PADDING-LEFT: 4pt; LINE-HEIGHT: 14pt; BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width="100%" border=0>

  <TR vAlign=bottom>
    <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-TOP: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=left width="3%"><B><FONT face="Times New Roman" size=2>1</FONT></B></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-TOP: #000000 1pt solid" noWrap align=left width="96%" colSpan=3><FONT face="Times New Roman" size=2>Name of Reporting Persons.&nbsp;&nbsp; I.R.S. Identification Nos.
      of above persons (entities only).</FONT></TD></TR>
  <TR style="LINE-HEIGHT: 5pt">
    <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="3%"></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=left width="96%" colSpan=3><FONT size=2 face="Times New Roman">&nbsp;</FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=left width="3%"></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid" noWrap align=left width="96%" colSpan=3><B><FONT face="Times New Roman" size=2>G</FONT></B><B><FONT face="Times New Roman" size=1>ERON </FONT></B><B><FONT face="Times New Roman" size=2>C</FONT></B><B><FONT face="Times New Roman" size=1>ORPORATION</FONT></B></TD></TR>
  <TR vAlign=bottom>
    <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=left width="3%"></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid" noWrap align=left width="96%" colSpan=3><FONT face="Times New Roman" size=2>I.R.S. Identification No.:
      </FONT><B><FONT face="Times New Roman" size=2>75-2287752</FONT></B></TD></TR>
  <TR style="LINE-HEIGHT: 5pt">
    <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="3%"></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="96%" colSpan=3><FONT size=2 face="Times New Roman">&nbsp;</FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=left width="3%"><B><FONT face="Times New Roman" size=2>2</FONT></B></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid" noWrap align=left width="96%" colSpan=3><FONT face="Times New Roman" size=2>Check the Appropriate Box if
      a Member of a Group (See Instructions)</FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=left width="3%"></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid" noWrap align=left width="96%" colSpan=3><FONT face="Times New Roman" size=2>(a) <FONT face=Wingdings>&#168;</FONT><FONT face="Times New Roman" size=2></FONT></FONT></TD></TR>
  <TR style="LINE-HEIGHT: 5pt">
    <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="3%"></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=left width="96%" colSpan=3><FONT size=2 face="Times New Roman">&nbsp;</FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=left width="3%"></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid" noWrap align=left width="96%" colSpan=3><FONT face="Times New Roman" size=2>(b) <FONT face=Wingdings>&#168;</FONT></FONT></TD></TR>
  <TR style="LINE-HEIGHT: 5pt">
    <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="3%"></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="96%" colSpan=3><FONT size=2 face="Times New Roman">&nbsp;</FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="BORDER-RIGHT: #000000 1pt solid; PADDING-BOTTOM: 8pt; BORDER-LEFT: #000000 1pt solid; PADDING-TOP: 8pt; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="3%"><B><FONT face="Times New Roman" size=2>3</FONT></B></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid; PADDING-BOTTOM: 8pt; PADDING-TOP: 8pt; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="96%" colSpan=3><FONT face="Times New Roman" size=2>SEC Use Only</FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="BORDER-RIGHT: #000000 1pt solid; PADDING-BOTTOM: 8pt; BORDER-LEFT: #000000 1pt solid; PADDING-TOP: 8pt; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="3%"><B><FONT face="Times New Roman" size=2>4</FONT></B></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid; PADDING-BOTTOM: 8pt; PADDING-TOP: 8pt; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="96%" colSpan=3><FONT face="Times New Roman" size=2>Source of Funds (See Instructions) </FONT><B><FONT face="Times New Roman" size=2>OO</FONT></B></TD></TR>
  <TR vAlign=bottom>
    <TD style="BORDER-RIGHT: #000000 1pt solid; PADDING-BOTTOM: 8pt; BORDER-LEFT: #000000 1pt solid; PADDING-TOP: 8pt; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="3%"><B><FONT face="Times New Roman" size=2>5</FONT></B></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid; PADDING-BOTTOM: 8pt; PADDING-TOP: 8pt; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="96%" colSpan=3><FONT face="Times New Roman" size=2>Check if Disclosure of Legal Proceedings Is Required Pursuant to
      Items 2(d) or
      2(e)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT face=Wingdings>&#168;</FONT><FONT face="Times New Roman" size=2></FONT></FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="BORDER-RIGHT: #000000 1pt solid; PADDING-BOTTOM: 8pt; BORDER-LEFT: #000000 1pt solid; PADDING-TOP: 8pt; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="3%"><B><FONT face="Times New Roman" size=2>6</FONT></B></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid; PADDING-BOTTOM: 8pt; PADDING-TOP: 8pt; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="96%" colSpan=3><FONT face="Times New Roman" size=2>Citizenship or Place of
      Organization&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
      </FONT><B><FONT face="Times New Roman" size=2>D</FONT></B><B><FONT face="Times New Roman" size=1>ELAWARE</FONT></B></TD></TR>
  <TR vAlign=bottom>
    <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="3%" rowSpan=4><FONT face="Times New Roman" size=2>&nbsp; Number of<BR>&nbsp; Shares?<BR>&nbsp; Beneficially<BR>&nbsp;
      Owned by<BR>&nbsp; Each<BR>&nbsp; Reporting<BR>&nbsp; Person<BR>&nbsp;
      With</FONT></TD>
    <TD noWrap align=left width="3%"></TD>
    <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" vAlign=middle noWrap align=left width="3%"><B><FONT face="Times New Roman" size=2>7</FONT></B></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" vAlign=middle noWrap align=left width="90%"><FONT face="Times New Roman" size=2>Sole Voting Power</FONT>&nbsp;<FONT size=2 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <B><FONT face="Times New Roman">6,537,779<SUP>(1)</SUP></FONT></B></FONT> <B><FONT face="Times New Roman" size=2><SUP></SUP></FONT></B></TD></TR>
  <TR vAlign=bottom>
    <TD noWrap align=left width="3%"></TD>
    <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" vAlign=middle noWrap align=left width="3%"><STRONG><FONT size=2 face="Times New Roman">8</FONT></STRONG></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" vAlign=middle noWrap align=left width="90%"><FONT size=2 face="Times New Roman">Shared Voting
      Power&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <B><FONT face="Times New Roman">0</FONT></B></FONT></TD></TR>
  <TR vAlign=bottom>
    <TD noWrap align=left width="3%"></TD>
    <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" vAlign=middle noWrap align=left width="3%"><B><FONT face="Times New Roman" size=2>9</FONT></B></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" vAlign=middle noWrap align=left width="90%"><FONT face="Times New Roman" size=2>Sole Dispositive
      Power&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </FONT><FONT size=2 face="Times New Roman"><B><FONT face="Times New Roman">6,537,779<SUP>(1)</SUP></FONT></B></FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="3%"></TD>
    <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" vAlign=middle noWrap align=left width="3%"><STRONG><FONT size=2 face="Times New Roman">10&nbsp;&nbsp;&nbsp;&nbsp; </FONT></STRONG></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" vAlign=middle noWrap align=left width="90%"><FONT size=2 face="Times New Roman">Shared
      Dispositive Power&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
      </FONT><FONT size=2 face="Times New Roman"><B><FONT face="Times New Roman">0</FONT></B></FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="BORDER-RIGHT: #000000 1pt solid; PADDING-BOTTOM: 8pt; BORDER-LEFT: #000000 1pt solid; PADDING-TOP: 8pt; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="3%"><B><FONT face="Times New Roman" size=2>11</FONT></B></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid; PADDING-BOTTOM: 8pt; PADDING-TOP: 8pt; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="96%" colSpan=3><FONT face="Times New Roman" size=2>Aggregate Amount Beneficially Owned by Each Reporting
      Person&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
      </FONT><B><FONT face="Times New Roman" size=2>6,537,779<SUP>(1)</SUP></FONT></B></TD></TR>
  <TR vAlign=bottom>
    <TD style="BORDER-RIGHT: #000000 1pt solid; PADDING-BOTTOM: 8pt; BORDER-LEFT: #000000 1pt solid; PADDING-TOP: 8pt; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="3%"><B><FONT face="Times New Roman" size=2>12</FONT></B></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid; PADDING-BOTTOM: 8pt; PADDING-TOP: 8pt; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="96%" colSpan=3><FONT face="Times New Roman" size=2>Check if the Aggregate Amount in Row (11) Excludes Certain Shares
      (See
      Instructions)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
      <FONT face=Wingdings>x</FONT><FONT face="Times New Roman"><STRONG><SUP>(1)</SUP></STRONG></FONT></FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="BORDER-RIGHT: #000000 1pt solid; PADDING-BOTTOM: 8pt; BORDER-LEFT: #000000 1pt solid; PADDING-TOP: 8pt; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="3%"><B><FONT face="Times New Roman" size=2>13</FONT></B></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid; PADDING-BOTTOM: 8pt; PADDING-TOP: 8pt; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="96%" colSpan=3><FONT face="Times New Roman" size=2>Percent of Class Represented by Amount in Row
      (11)</FONT>&nbsp;<FONT size=2 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <B><FONT face="Times New Roman">100%<SUP>(2)</SUP></FONT></B></FONT></TD></TR>
  <TR vAlign=bottom>
    <TD style="BORDER-RIGHT: #000000 1pt solid; PADDING-BOTTOM: 8pt; BORDER-LEFT: #000000 1pt solid; PADDING-TOP: 8pt; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="3%"><B><FONT face="Times New Roman" size=2>14</FONT></B></TD>
    <TD style="BORDER-RIGHT: #000000 1pt solid; PADDING-BOTTOM: 8pt; PADDING-TOP: 8pt; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="96%" colSpan=3><FONT face="Times New Roman" size=2>Type of Reporting Person (See
      Instructions)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
      </FONT><B><FONT face="Times New Roman" size=2>CO</FONT></B></TD></TR></TABLE>____________________<BR>&nbsp;<BR>
<TABLE cellSpacing=0 cellPadding=0 border=0>

  <TR>
    <TD vAlign=top noWrap><FONT face="Times New Roman" size=1>(1)</FONT></TD>
    <TD vAlign=top noWrap><FONT size=1 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
    </FONT></TD>
    <TD vAlign=top width="100%"><FONT face="Times New Roman" size=1>Beneficial ownership of the
      shares of Series A common stock, par value $0.0001 per share (the &#147;Series
      A Common Stock&#148;), of Asterias Biotherapeutics, Inc., a Delaware
      Corporation (the &#147;Issuer&#148;), is being reported hereunder because the
      Reporting Person may be deemed to have beneficial ownership of such shares
      of Series A Common Stock by virtue of such shares of Series A Common Stock
      being issued to the Reporting Person pursuant to the Asset Contribution
      Agreement, dated as of January 4, 2013, by and among the Reporting Person,
      the Issuer and BioTime, Inc. (the &#147;Agreement&#148;). Under the terms of the
      Agreement and subject to applicable law, the Reporting Person is
      contractually obligated to distribute all of the shares of Series A Common
      Stock to the Reporting Person&#146;s stockholders on a pro rata basis, other
      than with respect to fractional shares and shares that would otherwise be
      distributed to the Reporting Person&#146;s stockholders in certain excluded
      jurisdictions, which shares, as required by the Agreement, will be sold
      with the net cash proceeds therefrom distributed ratably to the Reporting
      Person&#146;s stockholders who would otherwise be entitled to receive such
      fractional or excluded-jurisdiction shares (collectively, the &#147;Series A
      Distribution&#148;). Pursuant to the Agreement, the Board of Directors of the
      Reporting Person has declared a record date of May 28, 2014 for
      determining the stockholders of record of the Reporting Person entitled to
      receive shares of Series A Common Stock (or cash in lieu thereof) in the Series A
      Distribution. Pending the completion of the Series A Distribution, the
      Reporting Person may be deemed to have beneficial ownership of such shares
      of Series A Common Stock. Neither the filing of this statement on Schedule
      13D/A nor any of its contents shall be deemed to constitute an admission
      by the Reporting Person that it is the beneficial owner of any of such
      shares for purposes of Section 13(d) of the Securities Exchange Act or for
      any other purpose, and such beneficial ownership is hereby expressly
      disclaimed.</FONT></TD></TR>
  <TR>
    <TD vAlign=top noWrap><FONT size=1 face="Times New Roman">(2)</FONT></TD>
    <TD vAlign=top noWrap></TD>
    <TD vAlign=top width="100%"><FONT size=1 face="Times New Roman">The percentages used herein are calculated
      based on an aggregate total of 6,537,779 shares of Series A Common Stock
      issued and outstanding as of May 9, 2014, as reported by the Issuer in its
      quarterly report on Form 10-Q, filed with the Securities and Exchange
      Commission on May 12, 2014 (the &#147;Form 10-Q&#148;). As reported in the Form
      10-Q, there were also 23,961,040 shares of the Issuer&#146;s Series B common
      stock outstanding on May 9, 2014, which shares of Series B common stock, according to the Form 10-Q,
      may be converted into shares of Series A Common Stock on a one-for-one basis by the Issuer&#146;s Board of Directors upon
      the occurrence of certain events. Assuming such conversion had occurred as
      of May 28, 2014, the percentage reported in Item 13 above would have been
      21.4%.</FONT></TD></TR></TABLE><BR>
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<DIV style="PAGE-BREAK-BEFORE: always"></DIV><BR>
<P align=center><B><FONT face="Times New Roman">SCHEDULE 13D/A</FONT></B><FONT face="Times New Roman">
</FONT></P>
<P align=left><FONT face="Times New Roman" size=2>This Amendment No. 1 on Schedule 13D/A
(the &#147;Amendment&#148;) amends and supplements the Schedule 13D originally filed with
the U.S. Securities and Exchange Commission on October 9, 2013 (the &#147;Geron
Schedule 13D&#148;) by Geron Corporation, a Delaware corporation (the &#147;Reporting
Person&#148; or &#147;Geron&#148;).</FONT></P>
<P align=left><FONT face="Times New Roman" size=2>Capitalized terms not defined herein have
the meanings given to such terms in the Geron Schedule 13D. Unless set forth
below, all previous Items set forth in the Geron Schedule 13D are unchanged.
This Amendment is being filed to amend and supplement Item 4 and Item 5 of the
Geron Schedule 13D as follows: </FONT></P>
<P align=left><B><FONT face="Times New Roman">Item 4 - Purpose of Transaction
</FONT></B></P>
<P align=left><FONT face="Times New Roman" size=2>The information contained in Item 4 of the
Geron Schedule 13D is hereby amended and supplemented by adding the following
information:</FONT></P>
<P align=left><FONT face="Times New Roman" size=2>The Board of Directors of Geron has
declared a record date of May 28, 2014 for determining the stockholders of
record of the Reporting Person entitled to receive shares of Series A Common
Stock (or cash in lieu thereof) in the Series A Distribution. Under the terms of
the Asset Contribution Agreement, Geron is contractually obligated to distribute
the shares of Series A Common Stock to Geron&#146;s stockholders on a pro rata basis,
other than with respect to fractional shares and shares that would otherwise be
distributed to Geron stockholders residing in certain excluded jurisdictions.
Only Geron stockholders as of the close of business on the May 28, 2014 record
date and residing in the following jurisdictions will receive shares of Series A
Common Stock in the Series A Distribution: the United States, Anguilla,
Argentina, Austria, Australia, Belgium, Bulgaria, Canada, Cayman Island, China,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany,
Greece, Guam, Guernsey, Hong Kong, Hungary, India, Ireland, Israel, Italy,
Japan, Korea, Latvia, Lebanon, Liechtenstein, Luxembourg, Malta, Mexico, Monaco,
Netherlands, Norway, Panama, Poland, Portugal, Puerto Rico, Romania, Saudi
Arabia, Singapore, Slovenia, Slovakia, Spain, Sweden, Switzerland, Taiwan,
United Arab Emirates, United Kingdom, Uruguay, British Virgin Island, and the
U.S. Virgin Island (collectively, the &#147;Distribution Jurisdictions&#148;). All
locations other than the Distribution Jurisdictions described above are
considered excluded jurisdictions. In lieu of Geron distributing the shares of
Series A Common Stock in excluded jurisdictions, the shares of Series A Common
Stock that Geron stockholders who reside in excluded jurisdictions would
otherwise receive will instead be sold for cash at prevailing market prices, and
the net cash proceeds will be distributed ratably to those stockholders. In
addition, fractional shares will not be distributed in the Series A Distribution
and will instead be aggregated and sold for cash at prevailing market prices,
and the net cash proceeds from the sales will be distributed ratably to Geron
stockholders who would otherwise be entitled to receive fractional shares. In order to receive shares or cash in the Series A Distribution, Geron stockholders as of the May 28, 2014 record date must hold their shares of Geron common stock through the ex-dividend date, which will be determined by Nasdaq. Geron
expects to complete the Series A Distribution by the end of July
2014.</FONT></P>
<P align=left><B><FONT face="Times New Roman">Item 5 - Interest in Securities of the Issuer
</FONT></B></P>
<P align=left><FONT face="Times New Roman" size=2>Item 5 of the Geron Schedule 13D is hereby
amended and supplemented by adding the following: </FONT></P>
<P align=left><FONT face="Times New Roman" size=2>(a)-(b): The responses of the Reporting
Person to rows (7) through (13) of the second page of this Amendment are
incorporated herein by reference. Following the completion of the Series A
Distribution, Geron will no longer hold any shares of Series A Common Stock. Except as a
result of the Series A Distribution, to the knowledge of the Reporting Person,
none of the persons listed on Schedule I to the Geron Schedule 13D beneficially
owns any shares of Series A Common Stock. The filing of this Amendment by the
Reporting Person shall not be considered an admission that the Reporting Person
is the beneficial owner of any of the shares of Series A Common Stock covered by
this Amendment for any purpose, and the Reporting Person expressly disclaims
such beneficial ownership.</FONT></P>
<P align=left><FONT face="Times New Roman" size=2>(c) Except as set forth in this Amendment,
neither the Reporting Person nor, to the knowledge of the Reporting Person, any
of the persons listed on Schedule I to the Geron Schedule 13D, has effected any
transaction in the Series A Common Stock during the past 60 days.</FONT></P>
<P align=left><FONT face="Times New Roman" size=2>(d) Except as a result of the Series A
Distribution, the Reporting Person does not know of any other person having the
right to receive or the power to direct the receipt of dividends from, or the
proceeds from the sale of, the Series A Common Stock. The persons known to the
Reporting Person having the right to acquire beneficial ownership of, or the
right to receive or the power to direct the receipt of dividends from, or the
proceeds from the sale of, the Series A Common Stock as a result of the Series A
Distribution, are those Geron stockholders as of the close of business on the
May 28, 2014 record date. Based on the number of outstanding shares of Series A
Common Stock on May 9, 2014 as reported by Asterias in their Form 10-Q, the Series
A Common Stock constitute 100% of the class of Series A Common Stock;
accordingly, based on shares of Series A Common Stock
outstanding on that date, Geron stockholders owning more than 5% of Geron&#146;s
common stock on the record date will be entitled to receive more than 5% of the outstanding
shares of Series A Common Stock (or cash in lieu thereof, as applicable) in the
Series A Distribution. To the knowledge of the Reporting Person, the beneficial
owners of more than 5% of Geron&#146;s common stock are those holders identified in
Geron&#146;s definitive proxy statement on Schedule 14A, filed with the Securities
and Exchange Commission on April 4, 2014.</FONT></P>

<P align=left><FONT face="Times New Roman" size=2>(e) Not applicable.</FONT></P>
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<DIV style="PAGE-BREAK-BEFORE: always"></DIV><BR>
<P align=center><B><FONT face="Times New Roman">SIGNATURE</FONT></B><FONT face="Times New Roman">
</FONT></P>
<P align=left>&nbsp;&nbsp;&nbsp;&nbsp; <FONT face="Times New Roman" size=2>After reasonable inquiry and to the best
of my knowledge and belief, I certify that the information set forth in this
statement is true, complete and correct. </FONT></P>
<TABLE style="LINE-HEIGHT: 14pt; BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width="100%" border=0>

  <TR>
    <TD noWrap align=left width="49%"></TD>
    <TD noWrap align=left width="1%">&nbsp;&nbsp;&nbsp;&nbsp; </TD>
    <TD noWrap align=left width="1%"></TD>
    <TD noWrap style="text-align: center" width="48%" colSpan=2>
      <P align=center><FONT face="Times New Roman" size=2>GERON CORPORATION</FONT></P></TD></TR>
  <TR>
    <TD noWrap align=left width="49%"></TD>
    <TD noWrap align=left width="1%"></TD>
    <TD noWrap align=left width="1%"></TD>
    <TD noWrap align=right width="24%">&nbsp;</TD>
    <TD noWrap align=left width="24%"></TD></TR>
  <TR vAlign=bottom>
    <TD noWrap align=left width="49%"><FONT face="Times New Roman" size=2>Date: May 28, 2014</FONT></TD>
    <TD noWrap align=left width="1%"></TD>
    <TD noWrap align=left width="1%"><FONT face="Times New Roman" size=2>By:</FONT></TD>
    <TD style="BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="24%"><FONT face="Times New Roman" size=2>&nbsp;&nbsp; /s/ Olivia K. Bloom</FONT></TD>
    <TD noWrap align=left width="24%"></TD></TR>
  <TR vAlign=bottom>
    <TD noWrap align=left width="49%">&nbsp;</TD>
    <TD noWrap align=left width="1%">&nbsp;</TD>
    <TD noWrap align=left width="1%">&nbsp;</TD>
    <TD noWrap align=left width="24%"><FONT face="Times New Roman" size=2>&nbsp;&nbsp; Olivia K. Bloom</FONT></TD>
    <TD noWrap align=left width="24%"></TD></TR>
  <TR vAlign=bottom>
    <TD noWrap align=left width="49%">&nbsp;</TD>
    <TD noWrap align=left width="1%"></TD>
    <TD noWrap align=left width="1%"></TD>
    <TD noWrap align=left width="24%"><FONT face="Times New Roman" size=2>&nbsp;&nbsp; Executive Vice President,
      Finance,</FONT></TD>
    <TD noWrap align=left width="24%"></TD></TR>
  <TR vAlign=bottom>
    <TD noWrap align=left width="49%">&nbsp;</TD>
    <TD noWrap align=left width="1%"></TD>
    <TD noWrap align=left width="1%"></TD>
    <TD noWrap align=left width="24%"><FONT face="Times New Roman" size=2>&nbsp;&nbsp; Chief Financial Officer and
      Treasurer</FONT></TD>
    <TD noWrap align=left width="24%"></TD></TR></TABLE><BR>
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