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* KOLINSKI STUART (Last) (First) (Middle) 777 OLD SAW MILL RIVER ROAD (Street) TARRYTOWN NY 10591 (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) Director 10% Owner X Officer (give title below) Other (specify below) VP, Gen Counsel & Secretary
	3. Date of Earliest Transaction (Month/Day/Year) 01/05/2005
	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

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
Incentive Stock Option (right to buy)	$8.5	01/05/2005		A	V	4,359		(1)	01/05/2011	Common Stock	4,359	$0	4,359	D
Incentive Stock Option (right to buy)	$8.5	01/05/2005		A	V	1,715		(1)	12/20/2012	Common Stock	1,715	$0	1,715	D
Incentive Stock Option (right to buy)	$19.43	01/05/2005		D			5,146	(2)	12/20/2012	Common Stock	5,146	$0	0	D
Incentive Stock Option (right to buy)	$33.25	01/05/2005		D			15,035	(3)	09/18/2010	Common Stock	15,035	$0	0	D
Non-Qualified Stock Option (right to buy)	$8.5	01/05/2005		A	V	1,666		(1)	01/05/2011	Common Stock	1,666	$0	1,666	D
Non-Qualified Stock Option (right to buy)	$8.5	01/05/2005		A	V	17,482		(1)	01/05/2011	Common Stock	17,482	$0	19,148	D
Non-Qualified Stock Option (right to buy)	$8.5	01/05/2005		A	V	3,158		(1)	01/05/2011	Common Stock	3,158	$0	22,306	D
Non-Qualified Stock Option (right to buy)	$8.5	01/05/2005		A	V	12,500		(1)	12/18/2011	Common Stock	12,500	$0	12,500	D
Non-Qualified Stock Option (right to buy)	$8.5	01/05/2005		A	V	16,569		(1)	12/20/2012	Common Stock	16,569	$0	16,569	D
Non-Qualified Stock Option (right to buy)	$8.5	01/05/2005		A	V	1,715		(1)	12/20/2012	Common Stock	1,715	$0	18,284	D
Non-Qualified Stock Option (right to buy)	$19.43	01/05/2005		D			24,854	(2)	12/20/2012	Common Stock	24,854	$0	0	D
Non-Qualified Stock Option (right to buy)	$28.01	01/05/2005		D			25,000	(4)	12/18/2011	Common Stock	25,000	$0	0	D
Non-Qualified Stock Option (right to buy)	$33.25	01/05/2005		D			34,965	(3)	09/18/2010	Common Stock	34,965	$0	0	D
Non-Qualified Stock Option (right to buy)	$37.78	01/05/2005		D			5,000	(5)	12/21/2010	Common Stock	5,000	$0	0	D

Explanation of Responses:

1. The stock option award (combined incentive stock option and non-qualified stock option) vests in four equal annual installments, commencing one year after the date of grant.

2. The stock option award (combined incentive stock option and non-qualified stock option) was originally granted on December 20, 2002 and vests in four equal annual installments, commencing one year after the date of grant.

3. The stock option award (combined incentive stock option and non-qualified stock option) was originally granted on September 18, 2000 and vests in five equal annual installments, commencing one year after the date of grant.

4. The stock option award (combined incentive stock option and non-qualified stock option) was originally granted on December 18, 2001 and vests in four equal annual installments, commencing one year after the date of grant.

5. The stock option award (combined incentive stock option and non-qualified stock option) was originally granted on December 21, 2000 and vests in five equal annual installments, commencing one year after the date of grant.

	/s/**Stuart Kolinski	01/07/2005
	** 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.
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