Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
HEIDEN WILLIAM K
  2. Issuer Name and Ticker or Trading Symbol
AMAG PHARMACEUTICALS INC. [AMAG]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
President and CEO
(Last)
(First)
(Middle)
1100 WINTER STREET
3. Date of Earliest Transaction (Month/Day/Year)
08/19/2014
(Street)

WALTHAM, MA 02451
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 08/19/2014   A   10,000 (1) (2) A (3) 179,338 D  
Common Stock 08/19/2014   A   30,000 (1) (4) A (3) 209,338 D  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
HEIDEN WILLIAM K
1100 WINTER STREET
WALTHAM, MA 02451
  X     President and CEO  

Signatures

 Nancy R. Smith, attorney-in-fact   08/21/2014
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Each restricted stock unit ("RSU") represents a contingent right to receive one share of Common Stock of AMAG Pharmaceuticals, Inc. (the "Issuer").
(2) These shares of Common Stock are issuable pursuant to a grant of RSUs pursuant to the Issuer's Third Amended and Restated 2007 Equity Incentive Plan (the "Plan") that vest over 30 months after the grant date as follows: (i) 50% on January 4, 2016 and (ii) 50% on January 2, 2017.
(3) Not applicable.
(4) These shares of Common Stock are issuable pursuant to a performance-based RSU grant under the Plan and will be earned, if at all, based on achievement of certain (i) targets based upon calculated value expected to be realized with respect to certain business and corporate development transactions and (ii) stock price minimums, during the 30-month period ending January 2, 2017, measured as of January 4, 2016 (the "First Vesting Date") and January 2, 2017 (the "Second Vesting Date"). 50% of the RSU grant that is earned through the First Vesting Date shall vest as of such date, and 100% of the RSU grant that is earned through the Second Vesting Date, (less the portion previously vested) shall vest as of the Second Vesting Date, subject to continued employment of the grantee through each such date. The number above represents the maximum number of shares that may be delivered pursuant to the award.

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