Entry into a Material Definitive Agreement

On March 27, 2020 Merrimack Pharmaceuticals, Inc. (the "Company") reported that it has entered into an Asset Purchase Agreement (the "Asset Purchase Agreement") with Celator Pharmaceuticals, Inc. (the "Buyer"), pursuant to which the Buyer agreed to purchase certain assets (the "Transferred Assets") relating to certain of the Company’s preclinical nanoliposome programs (the "Transaction") (Filing, 8-K, Merrimack, MAR 27, 2020, View Source [SID1234555983]). The Company and the Buyer completed the Transaction simultaneously with the execution of the Asset Purchase Agreement. Under the terms of the Asset Purchase Agreement, the Buyer agreed to pay to the Company upfront cash payment of $2.25 million, and also agreed to reimburse the Company for certain specified expenses and to assume certain liabilities with respect to the acquired assets.

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Pursuant to the Asset Purchase Agreement, the Company assigned to the Buyer the previously disclosed intellectual property license agreement among the Company, Ipsen S.A. and Ipsen Biopharm Ltd. (together with Ipsen S.A., "Ipsen"), dated as of April 3, 2017, pursuant to which Ipsen granted the Company licenses to certain patents. On March 27, 2020, the Company and the Buyer also entered into an intellectual property license agreement pursuant to which the Buyer granted to the Company an exclusive license to certain specified know-how included in the Transferred Assets and an exclusive sublicense to the patents which are the subject of the license agreement with Ipsen, in each case to exploit certain specified nanoliposome products.

Both the Company and the Buyer have agreed to indemnify the other for losses arising from certain breaches of the Asset Purchase Agreement and for certain other potential liabilities, subject to certain limitations. The Asset Purchase Agreement also contains customary representations and warranties and covenants. The assertions embodied in those representations and warranties were made solely for purposes of the Asset Purchase Agreement and may be subject to important qualifications and limitations agreed to by the Company and the Buyer in connection with negotiating its terms. Moreover, the representations and warranties may be subject to a contractual standard of materiality that may be different from what may be viewed as material to stockholders or may have been used for the purpose of allocating risk between the Company and the Buyer rather than establishing matters as facts. For the foregoing reasons, no person should rely on such representations and warranties as statements of factual information at the time they were made or otherwise.

The foregoing description of the Asset Purchase Agreement does not purport to be complete and is qualified in its entirety by reference to the terms of the Asset Purchase Agreement, a copy of which is filed as Exhibit 2.1 hereto and incorporated herein by reference.