INSM Insmed Inc

Insmed Incorporated (NASDAQ: INSM), a biopharmaceutical company focused on developing and commercializing inhaled therapies for patients battling serious orphan lung diseases that are often life-threatening, today announced that the Company will release financial results for the three and twelve months ended December 31, 2012, before the opening of the stock market of Monday, March 18, 2013.

Will Lewis, President and Chief Executive Officer, and Andrew Drechsler, Chief Financial Officer, will host a conference call for investors beginning at 8:30 a.m. ET on Monday, March 18, 2013 to discuss the fourth quarter and full year 2012 financial results and to answer questions.

Shareholders and other interested parties may participate in the conference call by dialing 800-299-9630 (domestic) or 617-786-2904 (international) and entering passcode 99541272. The call will also be broadcast live on the Internet at www.streetevents.com, www.earnings.com and www.insmed.com.

A replay of the conference call will be accessible two hours after its completion through March 24, 2013 by dialing 888-286-8010 (domestic) or 617-801-6888 (international) and entering passcode 88911892. The call will also be archived for 90 days at www.streetevents.com, www.earnings.com and www.insmed.com.

About Insmed

Insmed Incorporated is a biopharmaceutical company dedicated to improving the lives of patients battling serious orphan lung diseases through the development and commercialization of inhalation therapies in orphan patient populations with critical unmet needs. Insmed's lead candidate, ARIKACE® or liposomal amikacin for inhalation, is engineered to deliver a proven and potent anti-infective directly to the site of serious lung infections to improve the efficacy, safety and convenience of treatment for at least two identified patient populations: cystic fibrosis (CF) patients with Pseudomonas aeuruginosa lung infections and patients with nontuberculous mycobacteria lung infections (NTM). Insmed's phase 3 registrational study of ARIKACE in Europe and Canada completed enrollment and the Company expects top-line clinical results in mid-2013. Insmed's U.S. phase 2 clinical trial in NTM is well under way with clinical results expected in late 2013. For more information, please visit http://www.insmed.com.

Forward-Looking Statements

This release contains forward-looking statements which 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 pre-clinical studies and clinical trials and pre-clinical and clinical data and the anticipated benefits of Insmed's products, constitute forward-looking statements which 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 our product development, delays in product development or clinical trials, patent disputes involving currently developing products, unexpected regulatory actions, delays or requests, the failure of future clinical trials, inability to successfully develop our product candidates or receive necessary regulatory approvals, inability to make product candidates commercially successful, changes in anticipated expenses, and other risks and challenges detailed in our filings with the U.S. Securities and Exchange Commission, including our Annual Report on Form 10-K for the year ended December 31, 2011 and our Quarterly Report on Form 10-Q for the quarter ended September 30, 2012. Investors are cautioned not to place undue reliance on any forward-looking statements which speak only as of the date of this release. We undertake no obligation to update these forward-looking statements to reflect events or circumstances or changes in our 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