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SEC FORM 4 SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940 		 
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
SHOOTER ERIC M
(Last) (First) (Middle)
370 GOLDEN OAK DRIVE
(Street)
PORTOLA VALLEY CA 94028
(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
REGENERON PHARMACEUTICALS INC [ REGN ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
09/11/2003
4. If Amendment, Date of Original Filed (Month/Day/Year)
 6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 09/11/2003 M 200 A $6 200 I by Trust
Common Stock 09/11/2003 S 200 D $20.86 0 I by Trust
Common Stock 09/11/2003 M 1,000 A $6 1,000 I by Trust
Common Stock 09/11/2003 S 1,000 D $20.87 0 I by Trust
Common Stock 09/11/2003 M 300 A $6 300 I by Trust
Common Stock 09/11/2003 S 300 D $20.874 0 I by Trust
Common Stock 09/11/2003 M 300 A $6 300 I by Trust
Common Stock 09/11/2003 S 300 D $20.88 0 I by Trust
Common Stock 09/11/2003 M 400 A $6 400 I by Trust
Common Stock 09/11/2003 S 400 D $20.89 0 I by Trust
Common Stock 09/11/2003 M 300 A $6 300 I by Trust
Common Stock 09/11/2003 S 300 D $20.894 0 I by Trust
Common Stock 09/11/2003 M 1,100 A $6 1,100 I by Trust
Common Stock 09/11/2003 S 1,100 D $20.9 0 I by Trust
Common Stock 09/11/2003 M 900 A $6 900 I by Trust
Common Stock 09/11/2003 S 900 D $20.91 0 I by Trust
Common Stock 09/11/2003 M 400 A $6 400 I by Trust
Common Stock 09/11/2003 S 400 D $20.93 0 I by Trust
Common Stock 09/11/2003 M 1,400 A $6 1,400 I by Trust
Common Stock 09/11/2003 S 1,400 D $20.94 0 I by Trust
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 8,051 03/13/1996 03/13/2005 Common Stock 8,051 $0 36,949 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 369 03/13/1996 03/13/2005 Common Stock 369 $0 36,580 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 370 03/13/1996 03/13/2005 Common Stock 370 $0 36,210 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 6,775 03/13/1996 03/13/2005 Common Stock 6,775 $0 29,435 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 123 03/16/1996 03/13/2005 Common Stock 123 $0 29,312 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 62 03/16/1996 03/13/2005 Common Stock 62 $0 29,250 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 185 03/13/1996 03/13/2005 Common Stock 185 $0 29,065 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 246 03/13/1996 03/13/2005 Common Stock 246 $0 28,819 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 246 03/13/1996 03/13/2005 Common Stock 246 $0 28,573 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 862 03/13/1996 03/13/2005 Common Stock 862 $0 27,711 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 62 03/13/1996 03/13/2005 Common Stock 62 $0 27,649 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 123 03/13/1996 03/13/2005 Common Stock 123 $0 27,526 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 2,094 03/13/1996 03/13/2005 Common Stock 2,094 $0 25,432 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 62 03/13/1996 03/13/2005 Common Stock 62 $0 25,370 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 62 03/13/1996 03/13/2005 Common Stock 62 $0 25,308 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 308 03/13/1996 03/13/2005 Common Stock 308 $0 25,000 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 700 03/13/1996 03/13/2005 Common Stock 700 $0 24,300 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 500 03/13/1996 03/13/2005 Common Stock 500 $0 23,800 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 100 03/13/1996 03/13/2005 Common Stock 100 $0 23,700 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 2,900 03/13/1996 03/13/2005 Common Stock 2,900 $0 20,800 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 800 03/13/1996 03/13/2005 Common Stock 800 $0 20,000 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 900 03/13/1996 03/13/2005 Common Stock 900 $0 19,100 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 1,000 03/13/1996 03/13/2005 Common Stock 1,000 $0 18,100 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 700 03/13/1996 03/13/2005 Common Stock 700 $0 17,400 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 300 03/13/1996 03/13/2005 Common Stock 300 $0 17,100 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 100 03/13/1996 03/13/2005 Common Stock 100 $0 17,000 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 6,200 03/13/1996 03/13/2005 Common Stock 6,200 $0 10,800 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 1,100 03/13/1996 03/13/2005 Common Stock 1,100 $0 9,700 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 600 03/13/1996 03/13/2005 Common Stock 600 $0 9,100 I by Trust
Non-Qualified Stock Option (right to buy) $6 09/11/2003 M 2,800 03/13/1996 03/13/2005 Common Stock 2,800 $0 6,300 I by Trust
Explanation of Responses:
Eric M. Shooter 09/12/2003
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.