X0306 4 2016-10-17 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 VP and General Counsel Common Stock 2016-10-17 4 S 0 1106 4.86 D 101567 D Sale of a total of 1,106 shares of common stock was made in order to satisfy Mr. Adams income tax withholding obligation upon the vesting of 3,333 shares of restricted stock on October 14, 2016. 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 70,362 shares of restricted stock. /s/ Brian Adams 2016-10-18