<SUBMISSION>
<ACCESSION-NUMBER>0000950123-04-005322
<TYPE>8-K
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20040428
<ITEMS>5
<FILING-DATE>20040428
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>REGENERON PHARMACEUTICALS INC
<CIK>0000872589
<ASSIGNED-SIC>2834
<IRS-NUMBER>133444607
<STATE-OF-INCORPORATION>NY
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>8-K
<ACT>34
<FILE-NUMBER>000-19034
<FILM-NUMBER>04760819
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>777 OLD SAW MILL RIVER RD
<CITY>TARRYTOWN
<STATE>NY
<ZIP>10591-6707
<PHONE>9143477000
</BUSINESS-ADDRESS>
</FILER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>y96770e8vk.htm
<DESCRIPTION>REGENERON PHARMACEUTICALS, INC.
<TEXT>
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<TITLE>REGENERON PHARMACEUTICALS, INC.</TITLE>
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<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<P align="center"><FONT size="4">SECURITIES AND EXCHANGE COMMISSION
</FONT>

<DIV align="center"><FONT size="3">Washington, D.C. 20549
</FONT>
</DIV>

<P align="center"><FONT size="5"><B>FORM 8-K</B>
</FONT>

<P align="center"><FONT size="3"><B>CURRENT REPORT</B>
</FONT>

<P align="center"><FONT size="3"><B>PURSUANT TO SECTION 13 OR 15(d) OF THE</B>
</FONT>

<P align="center"><FONT size="3"><B>SECURITIES EXCHANGE ACT OF 1934</B>
</FONT>

<P align="center"><FONT size="2">Date of Report (Date of earliest
event reported) <B>April&nbsp;28, 2004</B>
</FONT>

<P align="center"><FONT size="6"><B>REGENERON PHARMACEUTICALS, INC.</B>
</FONT>

<div align="left"><FONT size="2"><HR align="center" size="1" width="80%" noshade>
</FONT></div>
<DIV align="center"><FONT size="2">(Exact name of registrant as specified in its charter)
</FONT>
</DIV>

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<TABLE cellspacing="0" border="0" cellpadding="0" width="90%">
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    <TD width="34%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="28%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="28%">&nbsp;</TD>
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    <TD align="center" valign="top"><FONT size="2">NEW YORK</FONT></TD>
    <TD><FONT size="2">&nbsp;</FONT></TD>
    <TD align="center" valign="top"><FONT size="2">
0-19034
</FONT></TD>
    <TD><FONT size="2">&nbsp;</FONT></TD>
    <TD align="center" valign="top"><FONT size="2">No.&nbsp;13-3444607</FONT></TD>
</TR>
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    <TD align="center" valign="top"><HR size="1" noshade></TD>
    <TD><FONT size="2">&nbsp;</FONT></TD>
    <TD align="center" valign="top"><FONT size="2">
<HR size="1" noshade>
</FONT></TD>
    <TD><FONT size="2">&nbsp;</FONT></TD>
    <TD align="center" valign="top"><HR size="1" noshade></TD>
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    <TD align="center" valign="top"><FONT size="2">(State or other jurisdiction<BR>
of incorporation)</FONT></TD>
    <TD><FONT size="2">&nbsp;</FONT></TD>
    <TD align="center" valign="top"><FONT size="2">
(Commission<BR>
File Number)
</FONT></TD>
    <TD><FONT size="2">&nbsp;</FONT></TD>
    <TD align="center" valign="top"><FONT size="2">(IRS Employer<BR>
Identification No.)</FONT></TD>
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<TABLE cellspacing="0" border="0" cellpadding="0" width="90%">
<TR valign="bottom">
    <TD width="78%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="17%">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><FONT size="2">777 OLD SAW MILL RIVER ROAD, TARRYTOWN, NY</FONT></TD>
    <TD><FONT size="2">&nbsp;</FONT></TD>
    <TD align="left" valign="top"><FONT size="2">
10591-6707</FONT></TD>
</TR>
<TR>
    <TD valign="top"><HR size="1" noshade></TD>
    <TD><FONT size="2">&nbsp;</FONT></TD>
    <TD align="left" valign="top"><FONT size="2">
<HR size="1" noshade></FONT></TD>
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<TR valign="bottom">
    <TD valign="top"><FONT size="2">(Address of principal executive offices)</FONT></TD>
    <TD><FONT size="2">&nbsp;</FONT></TD>
    <TD align="left" valign="top"><FONT size="2">
(Zip Code)</FONT></TD>
</TR>
</TABLE>
</CENTER>
<CENTER>
<TABLE cellspacing="0" border="0" cellpadding="0" width="100%">
<TR valign="bottom">
    <TD width="25%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="8%">&nbsp;</TD>
        <TD width="10%">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top" align="right"><FONT size="2">Registrant&#146;s telephone number, including area code</FONT></TD>
    <TD><FONT size="2">&nbsp;</FONT></TD>
    <TD align="right" valign="top"><FONT size="2">
(914) 347-7000</FONT></TD>
</TR>
<TR>
    <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
    <TD><FONT size="2">&nbsp;</FONT></TD>
    <TD align="left" valign="top"><FONT size="2">
<HR size="1" noshade></FONT></TD>
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<P align="center"><FONT size="2">NOT APPLICABLE
</FONT>


<HR width="26%" align="center" size="1" noshade>


<div align="center"><FONT size="2"><FONT size="3">(Former name or former address, if changed since last report)
</FONT></FONT></div>

<P align="center"><FONT size="2">&nbsp;</FONT>


<P align="center"><FONT size="2"><B>Page 1 of 3</B>
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<!-- TOC -->
<A name="toc"><DIV align="CENTER" style="page-break-before:always"><U><B>TABLE OF CONTENTS</B></U></DIV></A>

<P><CENTER>
<TABLE border="0" width="90%" cellpadding="0" cellspacing="0">
<TR>
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<TR><TD colspan="9"><A HREF="#000">INFORMATION TO BE INCLUDED IN REPORT</A></TD></TR>
<TR><TD colspan="9"><A HREF="#001">Item&nbsp;5. Other Events and
Required FD Disclosure.</A></TD></TR>
<TR><TD colspan="9"><A HREF="#002">SIGNATURE</A></TD></TR>
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<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>




<!-- link1 "INFORMATION TO BE INCLUDED IN REPORT" -->
<DIV align="left"><A NAME="000"></A></DIV>
<P align="left"><FONT size="2"><B>INFORMATION TO BE INCLUDED IN REPORT</B>
</FONT>

<!-- link1 "Item&nbsp;5. Other Events and
Required FD Disclosure." -->
<DIV align="left"><A NAME="001"></A></DIV>
<P align="left"><FONT size="2"><B>Item&nbsp;5. Other Events and
Required FD Disclosure.</B>
</FONT>


<P align="left"><FONT size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In
conjunction with the purchase of Immunex Corporation by Amgen Inc. in
2002, Amgen was required by the U.S. Federal Trade Commission to
dispose of all of its Regeneron common shares. This divestiture was
subject to certain quarterly volume limitations unless otherwise
agreed to by Regeneron. On April&nbsp;28, 2004, Regeneron gave its
consent to Amgen to enter into a forward contract for the sale of
approximately 2.9&nbsp;million shares, representing Amgen's entire
holding of Regeneron common stock.
</FONT>
<P align="center"><FONT size="2">-2-</FONT>
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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<!-- link1 "SIGNATURE" -->
<DIV align="left"><A NAME="002"></A></DIV>
<P align="center"><FONT size="2"><B>SIGNATURE</B>
</FONT>

<P align="left"><FONT size="2">Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.
</FONT>
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    <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
    <TD><FONT size="2">&nbsp;</FONT></TD>
    <TD align="left" valign="top"><FONT size="2">
<B>Regeneron Pharmaceuticals, Inc.</B></FONT></TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
    <TD><FONT size="2">&nbsp;</FONT></TD>
    <TD align="left" valign="top"><FONT size="2">&nbsp;</FONT></TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
    <TD><FONT size="2">&nbsp;</FONT></TD>
    <TD align="left" valign="top"><FONT size="2">
By: /s/ Murray
A. Goldberg<HR noshade size="1" width="60%"></FONT></TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
    <TD><FONT size="2">&nbsp;</FONT></TD>
    <TD align="left" valign="top"><FONT size="2">&nbsp;</FONT></TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
    <TD><FONT size="2">&nbsp;</FONT></TD>
    <TD align="left" valign="top"><FONT size="2">
Murray A. Goldberg<br>
Senior Vice President, Finance and <BR>
Administration, Chief Financial
Officer, <BR>
Treasurer &#38; Assistant Secretary</FONT></TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
    <TD><FONT size="2">&nbsp;</FONT></TD>
    <TD align="left" valign="top"><FONT size="2">&nbsp;</FONT></TD>
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<TR valign="bottom">
    <TD valign="top"><FONT size="2">Date: April 28, 2004</FONT></TD>
    <TD><FONT size="2">&nbsp;</FONT></TD>
    <TD align="left" valign="top"><FONT size="2">&nbsp;</FONT></TD>
</TR>
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<P align="center"><FONT size="2">-3-</FONT>
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