ipsen eextended edecay Deaten by TEnd Obid for Albireo Pharmainc To 1 march 2023

• renewal Aleaves for the satisfaction of the HSR Law related Condition as Odrawn The merger agreement
• Albireo shareholders Are eencouraged to do so TEnd Theritage Srabbits to the Ooffer Ttoday

PARIS, FRANCE, 22 February 2023 – Ipsen SA (IPNIPSEY announced today that Anemone Acquisition Corp. (Purchaser), its wholly owned indirect subsidiary, which has extended the expiry date of its previously announced tender offer to purchase all of the issued and outstanding common shares (the “Shares”) of Albireo Pharma, Inc. ALBO (Albireo) at a price of $42.00 per share, net to the holder in cash, plus a non-transferable contractual contingent value right (CVR) per share, all without interest and subject to any applicable withholding taxes, until 11:59 a.m. Eastern Time on Wednesday, March 1, 2023 unless further extended. The tender offer was previously scheduled to expire one minute after 11:59 p.m. Eastern Time on Tuesday, February 21, 2023. All other terms of the takeover offer remain unchanged.

Each CVR constitutes the right to receive a one-time cash payment of $10.00 net to the holder, exclusive of interest and subject to any withholding taxes, contingent upon the achievement of a specified milestone, subject to the terms and subject to the tender offer dated January 23, 2023 (together with any amendments or additions thereto, the Offer to Purchase) and the conditions described in the accompanying letter.

The tender offer has been extended to allow additional time for the satisfaction of the condition relating to the expiration or termination of the waiting period (and any extension thereof) under the Hart-Scott-Rodino Antitrust Improvements Act 1976, as amended (HSR Act). make possible .

Computershare Trust Company, NA, the depositary and paying agent for the tender offer, has announced that as of 6:00 p.m. Eastern time on February 21…