EXHIBIT A
JOINT FILING AGREEMENT
The undersigned hereby agree that the statement on Schedule 13G with respect
to the shares of common stock, par value $0.01 per share, of
Merrimack Pharmaceuticals, Inc. dated as of February 22, 2024 is, and
any amendments thereto signed by each of the undersigned shall be, filed
on behalf of each of us pursuant to and in accordance with the provisions
of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended.
ADAR1 PARTNERS, LP
/s/ Xxxxxx Xxxxxxxxxxxx
Manager of ADAR1 Capital Management GP, LLC, the General Partner of
ADAR1 Partners, LP
ADAR1 CAPITAL MANAGEMENT, LLC
/s/ Xxxxxx Xxxxxxxxxxxx
Manager of ADAR1 Capital Management, LLC
ADAR1 CAPITAL MANAGEMENT GP, LLC
/s/ Xxxxxx Xxxxxxxxxxxx
Manager of ADAR1 Capital Management GP, LLC
XXXXXX XXXXXXXXXXXX
/s/ Xxxxxx Xxxxxxxxxxxx
