Geoff Allan Resigns from Insmed

Insmed Inc. (NASDAQ: INSM) , a biopharmaceutical company, today announced that Geoffrey Allan, Ph.D. has resigned as Insmed's President, Chief Executive Officer and Chairman of the Board of Directors, effective immediately, due to a health condition. Dr. Allan has served as Insmed's President, Chief Executive Officer and Chairman of the Board since its inception in November 1999.

Insmed's Board of Directors has chosen Melvin Sharoky, M.D. to assume the role of Chairman of the Board, formerly held by Dr. Allan. Dr. Sharoky has been a member of Insmed's Board of Directors since 2001 and has extensive executive experience in the biopharmaceutical industry, including serving as President and CEO of Somerset Pharmaceuticals from January 2002 until March 2007. In addition, he was President of Watson Pharmaceuticals, Inc. from July 1995 through January 1998.

Mr. Kevin P Tully C.G.A., Executive Vice President and Chief Financial Officer, Mr. Steve Glover, Chief Business Officer, and Mr. Glen Kelley, Vice President, Regulatory Affairs, will continue in their roles managing the day-to-day business and report directly to Dr. Sharoky.

Insmed's previously announced process of evaluating various alternatives for the use of the proceeds from the March 2009 asset sale to Merck will move forward uninterrupted with the continued assistance of Insmed's financial advisor, RBC Capital Markets.

"Geoff Allan has played a critical role in the evolution of Insmed from its inception, navigating the Company through the various challenges and uncertainties frequently encountered within the biotech sector, and putting Insmed in an envied position of financial strength in these times of market instability," said Dr. Sharoky. "His drive, commitment and counsel will be greatly missed and all of us at Insmed wish Geoff and his family the best as he confronts his health condition."

"Among Geoff's most substantial accomplishments as CEO was the assembly of a strong management team in Kevin, Steve and Glen," continued Dr. Sharoky. "As this core team will remain in place following Geoff's departure, I expect no change in the day-to-day operations of the Company, nor any delay in pursuing potential strategic initiatives. I look forward to working closely with the entire Insmed team to continue advancing the Company's drug development mission and enhancing shareholder value."