Corporate Governance | Regeneron Pharmaceuticals Inc.

Date	Name	Title	Filing	Type	Shares Traded	Price	Total Held
Dec 27, 2005	SCHLEIFER LEONARD S Director, Chief Exec Officer & President, Ten Percent Owner Trans History: 404	Director, Chief Exec Officer & President, Ten Percent Owner	Form 4	Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3	5,165	$15.67	122,007
Dec 27, 2005	YANCOPOULOS GEORGE Director, EVP, CSO, & Pres Regn Res Labs Trans History: 628	Director, EVP, CSO, & Pres Regn Res Labs	Form 4	Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3	15,865	$15.67	68,085
Dec 27, 2005	YANCOPOULOS GEORGE Director, EVP, CSO, & Pres Regn Res Labs Trans History: 628	Director, EVP, CSO, & Pres Regn Res Labs	Form 4	Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3	1,259	$15.67	66,826
Dec 23, 2005	GOLDBERG MURRAY A SVP Fin & Admin, CFO, & Treas Trans History: 645	SVP Fin & Admin, CFO, & Treas	Form 4	Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3	17,098	$13.31	37,268
Dec 23, 2005	GOLDBERG MURRAY A SVP Fin & Admin, CFO, & Treas Trans History: 645	SVP Fin & Admin, CFO, & Treas	Form 4	Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3	260	$13.31	37,008
Mar 01, 2004	BROWN MICHAEL S Director Trans History: 466	Director	Form 4	Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3	4,742	$14.76	5,258
Mar 01, 2004	SING GEORGE L Director Trans History: 320	Director	Form 4	Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3	4,742	$14.76	72,772
Jan 04, 2004	SCHLEIFER LEONARD S Director, Chief Exec Officer & President Trans History: 404	Director, Chief Exec Officer & President	Form 4	Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3	14,656	$15.01	111,290
Sep 17, 2003	SCHLEIFER LEONARD S Director, Chief Exec Officer & President Trans History: 404	Director, Chief Exec Officer & President	Form 4	Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3	88,007	$20.95	112,088
Sep 17, 2003	SCHLEIFER LEONARD S Director, Chief Exec Officer & President Trans History: 404	Director, Chief Exec Officer & President	Form 4	Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3	13,132	$20.95	98,956

* Represents the number of non-derivative securities directly held. (I) Indicates that some (or all) of these shares are held indirectly.

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