X0306 4 2017-01-30 0 0001114220 KERYX BIOPHARMACEUTICALS INC KERX 0001636994 Adams Brian C/O KERYX BIOPHARMACEUTICALS, INC. ONE MARINA PARK DRIVE, 12TH FLOOR BOSTON MA 02210 0 1 0 0 General Counsel and Secretary Common Stock 2017-01-30 4 S 0 6984 4.65 D 92559 D Sale of a total of 6,984 shares of common stock was made in order to satisfy Mr. Adams' income tax withholding obligation upon the vesting of 17,917 shares of restricted stock on January 27, 2017. Mr. Adams 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 47,122 shares of restricted stock. /s/ Brian Adams 2017-01-31