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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1446847	Ironwood Pharmaceuticals Inc	IRWD	Pharmaceutical Preparations (2834)	043404176

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1478521	J Michael Higgins	C/O Ironwood Pharmaceuticals, Inc. 301 Binney Street Cambridge MA 02142	Chief Operating Officer	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Class B Common Stock	Disposition	2013-03-05	50,000	$15.57	141,666	No	4	S	Direct
Class B Common Stock	Acquisiton	2013-03-06	100,000	$0.60	241,666	No	4	M	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct
No	4	M	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Class B Common Stock	Employee Stock Option (Right to Buy)	Disposition	2013-03-06	100,000	$0.00	100,000	$0.60

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
33,334		2013-07-15	No	4	M	Direct

Footnotes

In order to effect the sale, these shares of Class B Common Stock were converted into shares of Class A Common Stock in accordance with the issuer's certificate of incorporation.
The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.50 to $15.79, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
The option vested in installments upon the issuer's achievement of certain market capitalization, financing and clinical milestones. The milestones were met, and the option was fully vested as of December 31, 2006.