Merrimack Pharmaceuticals Inc
MACKDelisted- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001274792
Merrimack Pharmaceuticals Inc was delisted in 2024; its insiders filed their last Form 4 on Dec 28, 2023; 70 institutions reported holding it in 13F filings for Q1 2024, worth $138.5M in total; no superinvestor held it.
13F holders, Q2 2021
Institutional positions in Merrimack Pharmaceuticals Inc as of Jun 30, 2021. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 42
- −1 vs. Q1 2021
- Shares held
- 7.87M
- −61.2K (−0.8%) vs. Q1 2021
- Total value
- $50.3M
- +$479.0K (+1.0%) vs. Q1 2021
- New holders
- 5
- 7 more added
- Sold out
- 6
- 17 more reduced
Compare with Q1 2021: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MACK on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 1 | $0 |
| Q1 2026 | 1 | $0 |
| Q4 2025 | 1 | $0 |
| Q3 2025 | 1 | $0 |
| Q2 2025 | 1 | $0 |
| Q1 2025 | 1 | $0 |
| Q4 2024 | 2 | $370.7K |
| Q3 2024 | 2 | $0 |
| Q2 2024 | 12 | $5.32M |
| Q1 2024 | 70 | $138.5M |
| Q4 2023 | 67 | $126.4M |
| Q3 2023 | 63 | $104.4M |
| Q2 2023 | 62 | $98.5M |
| Q1 2023 | 50 | $91.0M |
| Q4 2022 | 47 | $86.6M |
| Q3 2022 | 41 | $30.0M |
| Q2 2022 | 42 | $48.0M |
| Q1 2022 | 40 | $49.4M |
| Q4 2021 | 37 | $29.4M |
| Q3 2021 | 38 | $37.1M |
| Q2 2021 | 42 | $50.3M |
| Q1 2021 | 43 | $49.8M |
Institutions, Q2 2021
Shares, value and share of portfolio for each institution holding Merrimack Pharmaceuticals Inc; share changes are against Q1 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Newtyn Management, LLC | 1,548,883 | $9.87M | 2.73% | 00.0% | Unchanged |
| Western Standard LLC | 1,269,558 | $8.11M | 4.84% | +257,987+25.5% | Added |
| 22NW, LP | 1,241,896 | $7.94M | 2.13% | 00.0% | Unchanged |
| Vanguard Group Inc | 618,609 | $3.95M | 0.00% | 00.0% | Unchanged |
| Nantahala Capital Management, LLC | 571,946 | $3.65M | 0.20% | −37,028−6.1% | Reduced |
| Bronte Capital Management Pty Ltd. | 548,836 | $3.51M | 0.53% | −1,843−0.3% | Reduced |
| Dimensional Fund Advisors LP | 517,645 | $3.31M | 0.00% | −1,575−0.3% | Reduced |
| Sepio Capital, LP | 221,439 | $1.42M | 0.12% | +2,532+1.2% | Added |
| Point72 Asset Management, L.P. | 209,563 | $1.34M | 0.01% | +209,563 | New |
| Wittenberg Investment Management, Inc. | 189,294 | $1.21M | 0.49% | +3,096+1.7% | Added |
| BlackRock Inc. | 187,090 | $1.20M | 0.00% | −68,413−26.8% | Reduced |
| Renaissance Technologies LLC | 101,970 | $652.0K | 0.00% | −86,191−45.8% | Reduced |
| Geode Capital Management, LLC | 96,692 | $617.0K | 0.00% | +5,484+6.0% | Added |
| Two Sigma Investments, LP | 62,119 | $397.0K | 0.00% | −154,722−71.4% | Reduced |
| Yakira Capital Management, Inc. | 60,634 | $387.0K | 0.06% | 00.0% | Unchanged |
| Bridgeway Capital Management, LLC | 59,200 | $378.0K | 0.01% | −5,000−7.8% | Reduced |
| State Street Corp | 46,556 | $297.0K | 0.00% | +35,371+316.2% | Added |
| Two Sigma Advisers, LP | 42,166 | $269.0K | 0.00% | −116,079−73.4% | Reduced |
| Susquehanna International Group, LLP | 41,822 | $267.0K | 0.00% | −64,507−60.7% | Reduced |
| Bank of New York Mellon Corp | 40,996 | $262.0K | 0.00% | −1,229−2.9% | Reduced |
| Marshall Wace, LLP | 39,150 | $250.0K | 0.00% | −52,616−57.3% | Reduced |
| Group One Trading, L.P. | 34,493 | $220.0K | 0.00% | +34,493 | New |
| Northern Trust Corp | 31,678 | $203.0K | 0.00% | −4,535−12.5% | Reduced |
| Citadel Advisors LLC | 19,152 | $122.0K | 0.00% | −1,592−7.7% | Reduced |
| Brown Advisory Inc | 15,029 | $96.0K | 0.00% | 00.0% | Unchanged |
| Cetera Advisor Networks LLC | 13,400 | $86.0K | 0.00% | +13,400 | New |
| Morgan Stanley | 11,161 | $72.0K | 0.00% | +5,218+87.8% | Added |
| Millennium Management LLC | 11,187 | $71.0K | 0.00% | −1,105−9.0% | Reduced |
| Price T Rowe Associates Inc | 10,500 | $67.0K | 0.00% | 00.0% | Unchanged |
| Webster Bank, N. A. | 3,055 | $20.0K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 2,008 | $13.0K | 0.00% | 00.0% | Unchanged |
| Bank of America Corp | 1,351 | $9.00K | 0.00% | +35+2.7% | Added |
| UBS Group AG | 499 | $3.00K | 0.00% | −1,194−70.5% | Reduced |
| Baldwin Brothers Inc | 500 | $3.00K | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 525 | $3.00K | 0.00% | +525 | New |
| Sandy Spring Bank | 300 | $2.00K | 0.00% | 00.0% | Unchanged |
| Cubist Systematic Strategies, LLC | 328 | $2.00K | 0.00% | +328 | New |
| Wells Fargo & Company | 136 | $1.00K | 0.00% | −1−0.7% | Reduced |
| Federated Hermes, Inc. | 220 | $1.00K | 0.00% | −2−0.9% | Reduced |
| O'Shaughnessy Asset Management, LLC | 141 | $1.00K | 0.00% | 00.0% | Unchanged |
| TSFG, LLC | 160 | $1.00K | 0.00% | 00.0% | Unchanged |
| AdvisorNet Financial, Inc | 20 | $0 | 0.00% | 00.0% | Unchanged |
| Voya Financial Advisors, Inc. | 0 | $0 | 0.00% | −13,400−100.0% | Sold out |
| Wolverine Trading, LLC | 0 | $0 | 0.00% | −10,124−100.0% | Sold out |
| Mascoma Wealth Management LLC | 0 | $0 | 0.00% | −5,000−100.0% | Sold out |
| Tower Research Capital LLC (TRC) | 0 | $0 | 0.00% | −2,579−100.0% | Sold out |
| Barclays PLC | 0 | $0 | 0.00% | −320−100.0% | Sold out |
| The PNC Financial Services Group, Inc. | 0 | $0 | 0.00% | −200−100.0% | Sold out |