SEC Seal
SEC Banner
EDGAR USA Search
EDGAR Search Results
Mailing Address ONE BROADWAY 14TH FLOOR CAMBRIDGE MA 02142
Business Address ONE BROADWAY 14TH FLOOR CAMBRIDGE MA 02142 617-441-1000
MERRIMACK PHARMACEUTICALS INC CIK#: 0001274792 (see all company filings)

SIC: 2834 - PHARMACEUTICAL PREPARATIONS
State location: MA | State of Inc.: DE | Fiscal Year End: 1231
(CF Office: 03 Life Sciences)
Get insider transactions for this issuer.

Filter Results
Search Within Files

(YYYYMMDD)
Ownership?


Enter keywords
Items 1 - 40  0001274792 Filings RSS Feed
Filings Format Description Filing Date File/Film Number
DEFA14A  Documents Additional definitive proxy soliciting materials and Rule 14(a)(12) material
Acc-no: 0001193125-24-078920 (34 Act)  Size: 53 KB
2024-03-27 001-35409
24791644
8-K  Documents   Interactive Data Current report, items 7.01 and 9.01
Acc-no: 0001193125-24-078910 (34 Act)  Size: 194 KB
2024-03-27 001-35409
24791623
DEFA14A  Documents Additional definitive proxy soliciting materials and Rule 14(a)(12) material
Acc-no: 0001193125-24-074722 (34 Act)  Size: 56 KB
2024-03-22 001-35409
24773436
DEF 14A  Documents Other definitive proxy statements
Acc-no: 0001193125-24-073941 (34 Act)  Size: 970 KB
2024-03-21 001-35409
24772060
10-K/A  Documents   Interactive Data [Amend] Annual report [Section 13 and 15(d), not S-K Item 405]
Acc-no: 0001193125-24-073929 (34 Act)  Size: 458 KB
2024-03-21 001-35409
24772025
425  Documents Prospectuses and communications, business combinations
Acc-no: 0001193125-24-062268 (34 Act)  Size: 49 KB
2024-03-07 001-35409
24730815
8-K  Documents   Interactive Data Current report, items 7.01 and 9.01
Acc-no: 0001193125-24-062260 (34 Act)  Size: 187 KB
2024-03-07 001-35409
24730768
10-K  Documents   Interactive Data Annual report [Section 13 and 15(d), not S-K Item 405]
Acc-no: 0000950170-24-027966 (34 Act)  Size: 5 MB
2024-03-07 001-35409
24730299
SC 13G/A  Documents [Amend] Statement of acquisition of beneficial ownership by individuals
Acc-no: 0001086364-24-007251 (34 Act)  Size: 12 KB
2024-03-07 005-86778
24729052
PRE 14A  Documents Other preliminary proxy statements
Acc-no: 0001193125-24-059357 (34 Act)  Size: 1 MB
2024-03-05 001-35409
24721496
SCHEDULE 13G  Documents Statement of acquisition of beneficial ownership by individuals
Acc-no: 0001758866-24-000002 (34 Act)  Size: 15 KB
2024-02-22 005-86778
24665657
SC 13G/A  Documents [Amend] Statement of acquisition of beneficial ownership by individuals
Acc-no: 0000921895-24-000491 (34 Act)  Size: 153 KB
2024-02-14 005-86778
24638699
DEFA14A  Documents Additional definitive proxy soliciting materials and Rule 14(a)(12) material
Acc-no: 0001193125-24-033779 (34 Act)  Size: 60 KB
2024-02-13 001-35409
24626433
8-K  Documents   Interactive Data Current report, items 7.01 and 9.01
Acc-no: 0001193125-24-033761 (34 Act)  Size: 202 KB
2024-02-13 001-35409
24626359
SC 13G  Documents Statement of acquisition of beneficial ownership by individuals
Acc-no: 0001086364-24-006061 (34 Act)  Size: 13 KB
2024-01-31 005-86778
24582173
SC 13D/A  Documents [Amend] General statement of acquisition of beneficial ownership
Acc-no: 0001493152-24-003744 (34 Act)  Size: 200 KB
2024-01-25 005-86778
24562181
SC 13D/A  Documents [Amend] General statement of acquisition of beneficial ownership
Acc-no: 0001193125-23-294323 (34 Act)  Size: 80 KB
2023-12-13 005-86778
231483998
8-K  Documents   Interactive Data Current report, items 7.01 and 9.01
Acc-no: 0001193125-23-269425 (34 Act)  Size: 172 KB
2023-11-02 001-35409
231373040
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0000950170-23-058273 (34 Act)  Size: 3 MB
2023-11-02 001-35409
231372874
SC 13D/A  Documents [Amend] General statement of acquisition of beneficial ownership
Acc-no: 0001193125-23-212302 (34 Act)  Size: 96 KB
2023-08-14 005-86778
231169831
8-K  Documents   Interactive Data Current report, items 7.01 and 9.01
Acc-no: 0001193125-23-202917 (34 Act)  Size: 179 KB
2023-08-03 001-35409
231140721
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0000950170-23-038082 (34 Act)  Size: 3 MB
2023-08-03 001-35409
231140601
8-K  Documents   Interactive Data Current report, item 5.07
Acc-no: 0001193125-23-162501 (34 Act)  Size: 158 KB
2023-06-07 001-35409
23998957
8-K  Documents   Interactive Data Current report, items 7.01 and 9.01
Acc-no: 0001193125-23-136111 (34 Act)  Size: 180 KB
2023-05-04 001-35409
23890182
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0000950170-23-017932 (34 Act)  Size: 2 MB
2023-05-04 001-35409
23889320
DEFA14A  Documents Additional definitive proxy soliciting materials and Rule 14(a)(12) material
Acc-no: 0001193125-23-110541 (34 Act)  Size: 478 KB
2023-04-21 001-35409
23836560
DEF 14A  Documents Other definitive proxy statements
Acc-no: 0001193125-23-109524 (34 Act)  Size: 1 MB
2023-04-21 001-35409
23834825
PRE 14A  Documents Other preliminary proxy statements
Acc-no: 0001193125-23-094728 (34 Act)  Size: 1 MB
2023-04-07 001-35409
23807916
8-K  Documents   Interactive Data Current report, items 7.01 and 9.01
Acc-no: 0001193125-23-066194 (34 Act)  Size: 179 KB
2023-03-09 001-35409
23720348
10-K  Documents   Interactive Data Annual report [Section 13 and 15(d), not S-K Item 405]
Acc-no: 0000950170-23-007063 (34 Act)  Size: 5 MB
2023-03-09 001-35409
23720170
SC 13G/A  Documents [Amend] Statement of acquisition of beneficial ownership by individuals
Acc-no: 0000899140-23-000369 (34 Act)  Size: 49 KB
2023-02-14 005-86778
23628658
SC 13G/A  Documents [Amend] Statement of acquisition of beneficial ownership by individuals
Acc-no: 0000921895-23-000448 (34 Act)  Size: 156 KB
2023-02-13 005-86778
23618794
8-K  Documents   Interactive Data Current report, items 1.01, 3.03, 7.01, and 9.01
Acc-no: 0001193125-22-298424 (34 Act)  Size: 190 KB
2022-12-05 001-35409
221444982
S-8  Documents Securities to be offered to employees in employee benefit plans
Acc-no: 0001193125-22-295409 (33 Act)  Size: 132 KB
2022-11-30 333-268609
221435874
8-K  Documents   Interactive Data Current report, items 7.01, 8.01, and 9.01
Acc-no: 0001193125-22-280787 (34 Act)  Size: 187 KB
2022-11-09 001-35409
221370866
8-K  Documents   Interactive Data Current report, items 7.01 and 9.01
Acc-no: 0001193125-22-276935 (34 Act)  Size: 173 KB
2022-11-03 001-35409
221358629
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0000950170-22-021933 (34 Act)  Size: 3 MB
2022-11-03 001-35409
221358577
8-K  Documents   Interactive Data Current report, items 7.01 and 9.01
Acc-no: 0001193125-22-212588 (34 Act)  Size: 174 KB
2022-08-04 001-35409
221137306
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0001564590-22-028022 (34 Act)  Size: 2 MB
2022-08-04 001-35409
221137196
SC 13G  Documents Statement of acquisition of beneficial ownership by individuals
Acc-no: 0000899140-22-000631 (34 Act)  Size: 58 KB
2022-08-04 005-86778
221137076