Merrimack(MACK) - 2020 Q4 - Annual Report
MerrimackMerrimack(US:MACK)2021-03-10 21:45

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 (I.R.S. Employer Identification No.) Registrant's telephone number, including area code: (617) 441-1000 For the transition period from to Commission file number 001-35409 Merrimack Pharmaceutica ...