X0306 4 2015-02-23 0 0000872589 REGENERON PHARMACEUTICALS INC REGN 0001487767 Aberman Michael S 777 OLD SAW MILL RIVER ROAD TARRYTOWN NY 10591 0 1 0 0 SVP Strategy Investor Relation Common Stock 2015-02-23 4 M 0 7500.0 30.63 A 26100 D Common Stock 2015-02-23 4 F 0 536.0 427.94 D 25564 D Common Stock 2015-02-23 4 F 0 3590.0 427.94 D 21974 D Common Stock 2015-02-24 4 S 0 600.0 416.31 D 21374 D Common Stock 2015-02-24 4 S 0 471.0 417.23 D 20903 D Common Stock 2015-02-24 4 S 0 800.0 418.33 D 20103 D Common Stock 2015-02-24 4 S 0 1103.0 419.52 D 19000 D Common Stock 2015-02-24 4 S 0 400.0 420.64 D 18600 D Common Stock 407 I By 401(k) Plan Non-Qualified Stock Option (right to buy) 30.63 2015-02-23 4 M 0 7500.0 0.0 D 2020-12-14 Common Stock 7500 7500 D Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c). Represents volume-weighted average price of sales of 600 shares of Company stock on February 24, 2015 at prices ranging from $416.01 to $416.83. Upon request by the Commission staff, the Company, or a security holder of the Company, the reporting person will provide full information regarding the number of shares sold by the reporting person on February 24, 2015 at each separate price. Represents volume-weighted average price of sales of 471 shares of Company stock on February 24, 2015 at prices ranging from $417.08 to $417.54. Upon request by the Commission staff, the Company, or a security holder of the Company, the reporting person will provide full information regarding the number of shares sold by the reporting person on February 24, 2015 at each separate price. Represents volume-weighted average price of sales of 800 shares of Company stock on February 24, 2015 at prices ranging from $418.07 to $418.82. Upon request by the Commission staff, the Company, or a security holder of the Company, the reporting person will provide full information regarding the number of shares sold by the reporting person on February 24, 2015 at each separate price. Represents volume-weighted average price of sales of 1,103 shares of Company stock on February 24, 2015 at prices ranging from $419.00 to $419.96. Upon request by the Commission staff, the Company, or a security holder of the Company, the reporting person will provide full information regarding the number of shares sold by the reporting person on February 24, 2015 at each separate price. Represents volume-weighted average price of sales of 400 shares of Company stock on February 24, 2015 at prices ranging from $420.30 to $420.97. Upon request by the Commission staff, the Company, or a security holder of the Company, the reporting person will provide full information regarding the number of shares sold by the reporting person on February 24, 2015 at each separate price. The stock option award vests in four equal annual installments, commencing one year after the date of grant. /s/**Michael S. Aberman 2015-02-25