Insmed Reports Inducement Grants Under NASDAQ Listing Rule 5635(c)(4)

Insmed Incorporated (Nasdaq:INSM), a global biopharmaceutical company on a mission to transform the lives of patients with serious and rare diseases, today announced the granting of inducement awards to two new employees. In accordance with NASDAQ Listing Rule 5635(c)(4), the awards were approved by Insmed's Compensation Committee and made as a material inducement to each employee's entry into employment with the Company.

In connection with the commencement of their employment, the employees received options on December 3, 2018 to purchase an aggregate 58,990 shares of Insmed common stock at an exercise price of $18.70 per share, the closing trading price on the Nasdaq Global Select Market on the date of grant.

The options have a ten-year term and a four-year vesting schedule, with 25% of the shares subject to the option vesting on the first anniversary of the relevant grant date and 12.5% of the shares subject to the option vesting every six months thereafter through the fourth anniversary of the relevant grant date, subject to the relevant employee's continued service with Insmed on the applicable vesting date.

About Insmed

Insmed Incorporated is a global biopharmaceutical company on a mission to transform the lives of patients with serious and rare diseases. Insmed’s first commercial product is ARIKAYCE® (amikacin liposome inhalation suspension), which is approved in the United States for the treatment of Mycobacterium avium complex (MAC) lung disease as part of a combination antibacterial drug regimen for adult patients with limited or no alternative treatment options. MAC lung disease is a rare and often chronic infection that can cause irreversible lung damage and can be fatal. Insmed's earlier-stage clinical pipeline includes INS1007, a novel oral reversible inhibitor of dipeptidyl peptidase 1 with therapeutic potential in non-cystic fibrosis bronchiectasis and other inflammatory diseases, and INS1009, an inhaled formulation of a treprostinil prodrug that may offer a differentiated product profile for rare pulmonary disorders, including pulmonary arterial hypertension. For more information, visit www.insmed.com.

Contact:Blaine Davis Vice President, Head of Investor Relations Insmed Incorporated [phone] [e-mail]