Merrimack Pharmaceuticals Inc
MACKDelisted May 10, 2024- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001274792
Merrimack Pharmaceuticals Inc was delisted on May 10, 2024; its insiders filed their last Form 4 on Dec 28, 2023; 70 institutions reported holding it in 13F filings for Q1 2024, worth $137.1M in total; no superinvestor held it.
Holders of 5% or more of MACK
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Merrimack Pharmaceuticals Inc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| ADAR1 Partners, LP | 13G | 6.30%902.4K shares | New | Feb 22, 20241 filing | Feb 22, 2024 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
1 Schedule 13D or 13G filing on Merrimack Pharmaceuticals Inc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Feb 22, 20244:46 PM ET | ADAR1 Partners, LPand 3 others | 13G | 6.30%902.4K shares | New | Feb 13, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Merrimack Pharmaceuticals Inc shares.
No Form 144 notices for Merrimack Pharmaceuticals Inc are on file.