X0306 4 2014-06-16 0 0001446847 IRONWOOD PHARMACEUTICALS INC IRWD 0001024003 COOK JOSEPH C JR C/O IRONWOOD PHARMACEUTICALS, INC. 301 BINNEY STREET CAMBRIDGE MA 02142 1 0 0 0 Class A Common Stock 2014-06-16 4 S 0 600 15.00 D 69756 D Class A Common Stock 2014-06-18 5 J 0 E 1019 0.00 A 70775 D Class A Common Stock 2014-06-18 4 C 0 10000 0.00 A 80775 D Class B Common Stock 2014-06-18 4 C 0 10000 0.00 D 352163 D Class B Common Stock 24000 I By Farview Management Company, L.P. This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person. Distributed pro rata to the limited partners of Farview Management Company, L.P. without additional consideration in accordance with the partnership agreement of Farview Management Company, L.P. In order to effect the distribution, shares of Class B Common Stock were converted into shares of Class A Common Stock in accordance with the issuer's certificate of incorporation. On June 18, 2014, the reporting person converted 10,000 shares of Class B Common Stock into 10,000 shares of Class A Common Stock. Under the issuer's certificate of incorporation, the Class B Common Stock is convertible into Class A Common Stock at any time on a one-for-one basis. In prior reports, the reporting person reported indirect beneficial ownership of 43,025 shares of Class B Common Stock held by Farview Management Company, L.P. On June 18, 2014, Farview Management Company, L.P. distributed 19,025 shares to its limited partners without additional consideration in accordance with its partnership agreement. In order to effect the distribution, such 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 reporting person is a general partner of Farview Management Company, L.P., the beneficial owner of the securities. /s/ Halley E. Gilbert Attorney-in-Fact 2014-06-18