Merrimack PharmaceuticalsMACK
13F holders, Q2 2024 (June 30)12holders −58
4new positions
63sold out
$12.17avg. 13F price*
At the end of Q2 2024, 12 institutions reported holding Merrimack Pharmaceuticals Inc. (MACK) in their 13F filings, down 58 from Q1 2024. 4 opened new positions and 63 sold out. The largest holders were Dimensional Fund Advisors LP ($4.8M), Goldman Sachs Group Inc. ($451K) and Rhumbline Advisers ($38K).
- Company
- Merrimack Pharmaceuticals Inc.
- CUSIP
- 590328209
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2024 → Q2 2024
| Institutions | Total Value | |
|---|---|---|
| New Positions | 4 | $2K |
| Exits | 63 | $130.8M |
All 13F filers, Q1 2024 → Q2 2024: 100,746 shares bought and 8,948,286 shares sold, net −8,847,540 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 12 holders
| Dimensional Fund Advisors LP | 0.00% | Reduce -19.9% | 318,995 | $4.8M |
| Goldman Sachs Group Inc. | 0.00% | Add +106.0% | 29,807 | $451K |
| Rhumbline Advisers | 0.00% | Reduce -81.7% | 2,480 | $38K |
| Rise Advisors, LLC | 0.00% | No change | 272 | $4K |
| JBF Capital, Inc. | 0.00% | New | 39,637 | $1K |
| Marshall Wace, LLP | 0.00% | New | 38,221 | $1K |
| Caldwell Sutter Capital, Inc. | 0.00% | New | 7,458 | $0 |
| Nisa Investment Advisors, LLC | 0.00% | No change | 15 | $0 |
| Cwm, LLC | 0.00% | Add +340.0% | 22 | $0 |
| Cornerstone Planning Group LLC | 0.00% | No change | 231 | $0 |
| Covestor Ltd | 0.00% | No change | 106 | $0 |
| Farther Finance Advisors, LLC | 0.00% | New | 77 | $0 |
"% of holder's portfolio" is MACK's weight in each manager's 13F, not the share of Merrimack Pharmaceuticals Inc. the manager owns.