INSM Insmed Inc

Insmed Incorporated (NASDAQ: INSM), ("Insmed" or the "Company"), a biopharmaceutical company focused on developing and commercializing an inhaled anti-infective to treat patients battling serious lung diseases that are often life-threatening, today announced that the Company will report top-line results from its European and Canadian Phase 3 study of ARIKACE® (liposomal amikacin for inhalation) to treat cystic fibrosis patients with Pseudomonas aeruginosa lung infections on Monday, July 1, 2013 at 7:00 a.m. Eastern time.

Insmed management will hold a conference call to discuss the results and answer questions on Monday, July 1, 2013 beginning at 8:00 a.m. Eastern time. Shareholders and other interested parties may participate in the call by dialing 888-803-5993 (domestic) or 706-634-5454 (international) and referencing conference ID number 13711485. The press release and several data slides will be posted at 7:15 a.m. Eastern time on July 1, 2013 on the homepage of the Company's website at www.insmed.com. The call will also be webcast live and archived on the Company's website at http://investor.insmed.com/events.cfm.

A replay of the conference call will be accessible two hours after its completion through July 15, 2013, by dialing 855-859-2056 (domestic) or 404-537-3406 (international) and referencing conference ID number 13711485. The call will also be archived for 90 days on the Company's website at www.insmed.com.

About Insmed

Insmed Incorporated is a biopharmaceutical company dedicated to improving the lives of patients battling serious lung diseases. Insmed is focused on the development and commercialization of ARIKACE®, or liposomal amikacin for inhalation, for at least two identified orphan patient populations: cystic fibrosis (CF) patients with Pseudomonas aeruginosa lung infections and patients with non-tuberculous mycobacteria (NTM) lung infections. For more information, please visit http://www.insmed.com.

Forward-Looking Statements

This release contains forward-looking statements that are made pursuant to provisions of Section 21E of the Securities Exchange Act of 1934. Words, and variations of words, such as "intend," "expect," "will," "anticipate," "believe," "continue," "propose" and similar expressions are intended to identify forward-looking statements. Investors are cautioned that such statements in this release, including statements relating to the status, results and timing of results of preclinical studies and clinical trials and preclinical and clinical data and the anticipated benefits of Insmed's products, and to the Company's cash position and financing needs, constitute forward-looking statements that involve risks and uncertainties that could cause actual results to differ materially from those in the forward-looking statements. Such risks and uncertainties include, without limitation, failure or delay of U.S. Food and Drug Administration and other regulatory reviews and approvals, competitive developments affecting the Company's product candidates, delays in product development or clinical trials or other studies, patent disputes and other intellectual property developments relating to the Company's product candidates, unexpected regulatory actions, delays or requests, the failure of clinical trials or other studies or results of clinical trials or other studies that do not meet expectations, inability to successfully develop the Company's product candidates or receive necessary regulatory approvals, inability to make product candidates commercially successful, changes in anticipated expenses, changes in the Company's financing requirements or ability raise additional capital, and other risks and challenges detailed in the Company's filings with the U.S. Securities and Exchange Commission, including its Annual Report on Form 10-K for the year ended December 31, 2012. Investors are cautioned not to place undue reliance on any forward-looking statements that speak only as of the date of this news release. The Company undertakes no obligation to update these forward-looking statements to reflect events or circumstances or changes in its expectations.

Investor Relations Contacts: LHA Anne Marie Fields Senior Vice President 212-838-3777 afields@lhai.com Bruce Voss Managing Director 310-691-7100 bvoss@lhai.com