X0306 4 2015-04-06 0 0001114220 KERYX BIOPHARMACEUTICALS INC KERX 0001251213 BENTSUR RON C/O KERYX BIOPHARMACEUTICALS, INC. 750 LEXINGTON AVENUE NEW YORK NY 10022 1 1 0 0 Chief Executive Officer Common Stock 2015-04-06 4 S 0 1592 11.68 D 777209 D Sale of a total of 1,592 shares of common stock was made in order to satisfy Mr. Bentsur's income tax withholding obligation upon the vesting of 4,302 shares of restricted stock on April 2, 2015. Mr. Bentsur had no discretion with respect to such sale, which was transacted automatically in accordance with the Issuer's corporate policies regarding the vesting of restricted stock. Includes 89,143 shares of restricted stock. /s/ Ron Bentsur 2015-04-08