X0306 4 2012-12-05 0 0000792977 AMAG PHARMACEUTICALS INC. AMAG 0001537670 Holmes Scott A C/O AMAG PHARMACEUTICALS, INC. 100 HAYDEN AVENUE LEXINGTON MA 02421 0 1 0 0 Chief Accounting Officer Common Stock 2012-12-05 4 M 0 2500 A 2500 D Common Stock 2012-12-05 4 S 0 2500 14.79 D 0 D Restricted Stock Units 2012-12-05 4 M 0 2500 A Common Stock 2500 2500 D The shares were acquired by the reporting person as a result of the partial vesting of the restricted stock unit grant described below. Not applicable. The sale reported on this Form 4 was effected pursuant to a 10b5-1 trading plan adopted by the reporting person. Each restricted stock unit represents a contingent right to receive one share of common stock of AMAG Pharmaceuticals, Inc. (the "Issuer"). Grant of restricted stock unit pursuant to the Issuer's Second Amended and Restated 2007 Equity Incentive Plan. This grant vests in three installments. The first installment of 2,500 restricted stock units vested on December 5, 2012. The remaining two installments of 1,250 restricted stock units each will vest on December 5, 2013 and December 5, 2014, respectively. Nancy R. Smith, attorney-in-fact 2012-12-06