Merrimack PharmaceuticalsMACK
13F holders, Q1 2025 (March 31)1holders −1
0new positions
1sold out
$0.00avg. 13F price*
At the end of Q1 2025, 1 institutions reported holding Merrimack Pharmaceuticals Inc. (MACK) in their 13F filings, down 1 from Q4 2024. 0 opened new positions and 1 sold out. The largest holder was MassMutual Private Wealth & Trust, FSB ($0).
- Company
- Merrimack Pharmaceuticals Inc.
- CUSIP
- 590328209
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2024 → Q1 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 0 | $0 |
| Exits | 1 | $0 |
All 13F filers, Q4 2024 → Q1 2025: 15 shares sold, net −15 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 1 holders
| MassMutual Private Wealth & Trust, FSB | 0.00% | No change | 24,500 | $0 |
"% of holder's portfolio" is MACK's weight in each manager's 13F, not the share of Merrimack Pharmaceuticals Inc. the manager owns.