Clementia Pharmaceuticals Inc. obtains interim order for proposed transaction with

Clementia Pharmaceuticals Inc. (NASDAQ: CMTA) is pleased to announce that it has obtained an interim order from the Qubec Superior Court in connection with the previously announced plan of arrangement pursuant to which a wholly-owned subsidiary of Ipsen S.A. is proposing to acquire all of the issued and outstanding common shares of Clementia for US$25.00 per share in cash upfront on completion of the transaction plus a deferred payment on the achievement of a future regulatory milestone in the form of a contingent value right (CVR) of US$6.00 per share payable upon the U.S. Food and Drug Administration (FDA) acceptance of the New Drug Application (NDA) filing for palovarotene for the treatment of multiple osteochondromas (MO) on or prior to December 31, 2024.

The interim order authorizes Clementia to call and hold on April 9, 2019 a special meeting of the holders of its common shares to approve the transaction. The transaction will require the approval of at least 66 2/3% of the votes cast by shareholders present in person or represented by proxy at the meeting as well as the approval of a majority of the votes cast by the Clementia’s disinterested shareholders present in person or represented by proxy at the meeting.

Clementia has set March 8, 2019 as the record date for the determination of the shareholders entitled to receive notice of and to vote at the meeting.

/Public Release.