SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Camber Capital Management LP (Last) (First) (Middle) 101 HUNTINGTON AVENUE SUITE 2101 (Street) BOSTON MA 02199 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol AMAG PHARMACEUTICALS, INC. [ AMAG ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 08/07/2019
	4. If Amendment, Date of 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

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	08/07/2019	08/07/2019	P		301,000	A	$7.7857	4,306,000	I	See Footnotes(1)(2)
Common Stock	08/07/2019	08/07/2019	P		50,000	A	$7.74	4,356,000	I	See Footnotes(1)(3)
Common Stock	08/07/2019	08/07/2019	P		4,000	A	$7.575	4,360,000	I	See Footnotes(1)(4)
Common Stock	08/09/2019	08/09/2019	P		26,600	A	$8.9395	4,386,600	I	See Footnotes(1)(5)
Common Stock	08/09/2019	08/09/2019	P		3,400	A	$9.1781	4,390,000	I	See Footnotes(1)(6)(7)

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 Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. Securities reported herein for Camber Capital Management LP (the "LP" ) represent Common Stock beneficially owned and held of record by Camber Capital Master Fund, L.P. (the "Master Fund") and another private investment fund (the "Fund") for which the LP serves as the investment manager. Stephen DuBois is the managing member of the LP and managing member of the general partner for the Fund and the Master Fund. The LP, the Master Fund, the Fund, the general partner and Mr. DuBois (the "Reporting Persons") are each beneficial owners and have an address of 101 Huntington Avenue, Floor 21, Boston, MA 02199. The Reporting Persons disclaim beneficial ownership, within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the shares in which the Reporting Persons have no actual pecuniary interest therein.

2. Of the securities reported for this transaction, 299,074 shares of Common Stock were purchased for the account of the Master Fund and 1,926 shares of Common Stock were purchased for the account of the Fund

3. Of the securities reported for this transaction, 49,680 shares of Common Stock were purchased for the account of the Master Fund and 320 shares of Common Stock were purchased for the account of the Fund

4. Of the securities reported for this transaction, 3,974 shares of Common Stock were purchased for the account of the Master Fund and 26 shares of Common Stock were purchased for the account of the Fund

5. Of the securities reported for this transaction, 26,430 shares of Common Stock were purchased for the account of the Master Fund and 170 shares of Common Stock were purchased for the account of the Fund

6. Of the securities reported for this transaction, 3,378 shares of Common Stock were purchased for the account of the Master Fund and 22 shares of Common Stock were purchased for the account of the Fund

7. As of the closing of trading on August 09, 2019, 4,361,316 shares of Common Stock were held for the account of the Master Fund and 28,684 shares of Common Stock were held for the account of the Fund.

	/s/ Stephen DuBois	08/09/2019
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
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