Schedule 13G Amendment No. 1

-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, RGNwZmcBgPMvf5pYu2Ya1fMP96M+cVFl441zYjRrFmPG8hEyaN5SAXvoqwn34tge qU6ke4eqFZ6g2PgXLAX3GA== 0001193125-11-034577.txt : 20110214 0001193125-11-034577.hdr.sgml : 20110214 20110214125939 ACCESSION NUMBER: 0001193125-11-034577 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20110214 DATE AS OF CHANGE: 20110214 GROUP MEMBERS: ROBERTO MIGNONE SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: IRONWOOD PHARMACEUTICALS INC CENTRAL INDEX KEY: 0001446847 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 043404176 FILING VALUES: FORM TYPE: SC 13G/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-85292 FILM NUMBER: 11604356 BUSINESS ADDRESS: STREET 1: 301 BINNEY STREET CITY: CAMBRIDGE STATE: MA ZIP: 02142 BUSINESS PHONE: 617-621-7722 MAIL ADDRESS: STREET 1: 301 BINNEY STREET CITY: CAMBRIDGE STATE: MA ZIP: 02142 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: BRIDGER MANAGEMENT LLC CENTRAL INDEX KEY: 0001166309 IRS NUMBER: 000000000 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G/A BUSINESS ADDRESS: STREET 1: 90 PARK AVENUE, STREET 2: 40TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10016 BUSINESS PHONE: 000 000 0000 MAIL ADDRESS: STREET 1: 90 PARK AVENUE, STREET 2: 40TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10016 SC 13G/A 1 dsc13ga.htm SCHEDULE 13G AMENDMENT NO. 1 Schedule 13G Amendment No. 1

Page 1 of 6 Pages

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No. 1)

IRONWOOD PHARMACEUTICALS, INC.

(Name of Issuer)

Class A Common Stock

(Title of Class of Securities)

46333X108

(CUSIP Number)

December 31, 2010

(Date of Event which requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

¨ Rule 13d-1(b)

x Rule 13d-1(c)

¨ Rule 13d-1(d)

The remainder of this cover page shall be filed out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).


		SCHEDULE 13G		Page 2 of 6 Pages


CUSIP No. 46333X108
1	NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON (ENTITIES ONLY) Bridger Management, LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER 0
		6	SHARED VOTING POWER 2,500,000
		7	SOLE DISPOSITIVE POWER 0
		8	SHARED DISPOSITIVE POWER 2,500,000
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,500,000
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* ¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.4%
12	TYPE OF REPORTING PERSON* OO


		SCHEDULE 13G		Page 3 of 6 Pages


CUSIP No. 46333X108
1	NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON (ENTITIES ONLY) Roberto Mignone
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION United States
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER 0
		6	SHARED VOTING POWER 2,500,000
		7	SOLE DISPOSITIVE POWER 0
		8	SHARED DISPOSITIVE POWER 2,500,000
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,500,000
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* ¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.4%
12	TYPE OF REPORTING PERSON* IN

Page 4 of 6 Pages

Item 1

(a).

Name of Issuer:

Ironwood Pharmaceuticals, Inc.

Item 1

(b).

Address of Issuer’s Principal Executive Offices:

301 Binney Street, Cambridge, MA, 02142, United States

Item 2

(a, b, c).

Name of Persons Filing, Address of Principal Business Office, Citizenship:

Bridger Management, LLC, a Delaware limited liability company, 90 Park Avenue – 40th Floor, New York, NY 10016

Mr. Roberto Mignone (“Mr. Mignone”), 90 Park Avenue – 40th Floor, New York, NY 10016. Mr. Mignone is a United States citizen.

Item 2

(d).

Title of Class of Securities:

Class A Common Stock, $0.001 par value per share (the “Common Stock”)

Item 2

(e).

CUSIP Number:

46333X108

Item 3.

Not Applicable.

Page 5 of 6 Pages


Item 4.	Ownership.

	1.	Bridger Management, LLC:

	(a)	Amount beneficially owned:

		2,500,000 shares

	(b)	Percent of class:

		5.4%. The percentage of Common Stock reported as beneficially owned is based upon 46,560,437 shares of Class A common stock outstanding as reported by the Issuer on its Quarterly Report on Form 10-Q for the quarter ended September 30, 2010.

	(c)	Number of shares as to which such person has:

		(i)	Sole power to vote or to direct the vote:

			0

		(ii)	Shared power to vote or to direct the vote:

			2,500,000 shares

		(iii)	Sole power to dispose or to direct the disposition of:

			0

		(iv)	Shared power to dispose or to direct the disposition of:

			2,500,000 shares

	2.	Roberto Mignone

	(a)	Amount beneficially owned:

		2,500,000 shares

	(b)	Percent of class (determined as set forth in paragraph 1(b) of this Item 4):

		5.4%

	(c)	Number of shares as to which such person has:

		(i)	Sole power to vote or to direct the vote:

			0

		(ii)	Shared power to vote or to direct the vote:

			2,500,000 shares

		(iii)	Sole power to dispose or to direct the disposition of:

			0

		(iv)	Shared power to dispose or to direct the disposition of:

			2,500,000 shares

The Common Stock reported herein is beneficially owned as a result of the purchase of such shares by certain accounts managed by Bridger Management, LLC. Mr. Mignone is the managing member of Bridger Management, LLC.

Item 5.	Ownership of Five Percent or less of a Class:

	If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following ¨.

Item 6.	Ownership of More than Five Percent on Behalf of Another Person.

	The Common Stock reported herein is held by certain accounts managed by Bridger Management, LLC. No such interest relates to more than 5% of the class.

Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person.

	Not Applicable.

Item 8.	Identification and Classification of Members of the Group.

	Not Applicable.

Item 9.	Notice of Dissolution of Group.

	Not Applicable.

Item 10.	Certification.

	By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

[Signature Page Follows:]

Page 6 of 6 Pages

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

DATED: February 14, 2011


BRIDGER MANAGEMENT LLC

By:		/s/ Roberto Mignone
Roberto Mignone, Managing Member

/s/ Roberto Mignone
Roberto Mignone, Individually

EXHIBIT INDEX

Exhibit I — Joint Filing Statement Pursuant to Rule 13d-1(k)

Exhibit I

JOINT FILING STATEMENT

PURSUANT TO RULE 13d-1(k)

The undersigned acknowledge and agree that the foregoing statement on Schedule 13G/A, is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G/A, shall be filed on behalf of each of the undersigned without the necessity of filing additional joint acquisition statements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him or it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that he or it knows or has reason to believe that such information is inaccurate.

Dated: February 14, 2011

BRIDGER MANAGEMENT LLC

By: /s/ Roberto Mignone

Roberto Mignone, Managing Member

/s/ Roberto Mignone

Roberto Mignone, Individually

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