X0306 4/A 2016-01-05 2016-01-06 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 2016-01-05 4 S 0 3003 4.83 D 54455 D Common Stock 2016-01-06 4 S 0 1 4.70 D 54454 D Sale of a total of 3,004 shares of common stock was made in order to satisfy Mr. Adams' income tax withholding obligation upon the vesting of 7,959 shares of restricted stock on January 4, 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. The Form 4 originally filed on January 6, 2016 is being amended to revise Column 2 and Column 4 to state that (a) 3,003 shares of common stock were disposed of on January 5, 2016 at $4.83 per share and (b) 1 share of common stock was disposed of on January 6, 2016 at $4.70 per share. Includes 35,914 shares of restricted stock. /s/ Brian Adams 2016-01-08