Corporate Governance | Regeneron Pharmaceuticals Inc.

Date	Name	Title	Filing	Type	Shares Traded	Price	Total Held
Dec 27, 2005	YANCOPOULOS GEORGE Director, EVP, CSO, & Pres Regn Res Labs	Director, EVP, CSO, & Pres Regn Res Labs	Form 4	Exercise or conversion of derivative security exempted pursuant to Rule 16b-3	1,400	$12.75	65,850
Dec 27, 2005	YANCOPOULOS GEORGE Director, EVP, CSO, & Pres Regn Res Labs	Director, EVP, CSO, & Pres Regn Res Labs	Form 4	Open market or private sale of non-derivative or derivative security	1,400	$14.82	64,450
Dec 27, 2005	YANCOPOULOS GEORGE Director, EVP, CSO, & Pres Regn Res Labs	Director, EVP, CSO, & Pres Regn Res Labs	Form 4	Exercise or conversion of derivative security exempted pursuant to Rule 16b-3	1,100	$12.75	65,550
Dec 27, 2005	YANCOPOULOS GEORGE Director, EVP, CSO, & Pres Regn Res Labs	Director, EVP, CSO, & Pres Regn Res Labs	Form 4	Open market or private sale of non-derivative or derivative security	1,100	$14.81	64,450
Dec 27, 2005	YANCOPOULOS GEORGE Director, EVP, CSO, & Pres Regn Res Labs	Director, EVP, CSO, & Pres Regn Res Labs	Form 4	Exercise or conversion of derivative security exempted pursuant to Rule 16b-3	101	$12.75	64,551
Dec 27, 2005	YANCOPOULOS GEORGE Director, EVP, CSO, & Pres Regn Res Labs	Director, EVP, CSO, & Pres Regn Res Labs	Form 4	Open market or private sale of non-derivative or derivative security	101	$14.80	64,450
Dec 27, 2005	YANCOPOULOS GEORGE Director, EVP, CSO, & Pres Regn Res Labs	Director, EVP, CSO, & Pres Regn Res Labs	Form 4	Exercise or conversion of derivative security exempted pursuant to Rule 16b-3	19,500	$12.75	83,950
Dec 27, 2005	YANCOPOULOS GEORGE Director, EVP, CSO, & Pres Regn Res Labs	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	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 27, 2005	YANCOPOULOS GEORGE Director, EVP, CSO, & Pres Regn Res Labs	Director, EVP, CSO, & Pres Regn Res Labs	Form 4	Exercise or conversion of derivative security exempted pursuant to Rule 16b-3	299	--	5,201

* 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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