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.
13F holders, Q1 2024
Institutional positions in Merrimack Pharmaceuticals Inc as of Mar 31, 2024. 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
MACK is no longer listed, so this page shows Q1 2024. 13F filings for later quarters list far fewer holders.
- Institutional holders
- 70
- +3 vs. Q4 2023
- Shares held
- 9.28M
- −26.0K (−0.3%) vs. Q4 2023
- Total value
- $137.1M
- +$12.3M (+9.8%) vs. Q4 2023
- New holders
- 12
- 15 more added
- Sold out
- 9
- 21 more reduced
Compare with Q4 2023: 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 | $137.1M |
| Q4 2023 | 67 | $124.9M |
| 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 | $29.3M |
| Q3 2021 | 38 | $37.1M |
| Q2 2021 | 42 | $50.3M |
| Q1 2021 | 43 | $49.8M |
Institutions, Q1 2024
Shares, value and share of portfolio for each institution holding Merrimack Pharmaceuticals Inc; share changes are against Q4 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| CWM, LLC | 5 | $0 | 0.00% | +5 | New |
| Capital Advisors, Ltd. LLC | 28 | $0 | 0.00% | +28 | New |
| Nelson, Van Denburg & Campbell Wealth Management Group, LLC | 2 | $29 | 0.00% | +2 | New |
| GAMMA Investing LLC | 2 | $30 | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 15 | $222 | 0.00% | 00.0% | Unchanged |
| Armstrong Advisory Group, Inc | 45 | $604 | 0.00% | 00.0% | Unchanged |
| Horrell Capital Management, Inc. | 50 | $1.00K | 0.00% | 00.0% | Unchanged |
| POM Investment Strategies, LLC | 69 | $1.02K | 0.00% | +69 | New |
| TSFG, LLC | 160 | $2.00K | 0.00% | 00.0% | Unchanged |
| Covestor Ltd | 106 | $2.00K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 165 | $2.44K | 0.00% | +157+1,962.5% | Added |
| Cornerstone Planning Group LLC | 231 | $3.46K | 0.00% | +231 | New |
| Rise Advisors, LLC | 272 | $4.01K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 280 | $4.14K | 0.00% | −986−77.9% | Reduced |
| Kayne Anderson Rudnick Investment Management LLC | 300 | $4.43K | 0.00% | 00.0% | Unchanged |
| Sandy Spring Bank | 300 | $4.43K | 0.00% | 00.0% | Unchanged |
| Amalgamated Bank | 353 | $5.00K | 0.00% | −1,129−76.2% | Reduced |
| Deutsche Bank AG | 383 | $5.66K | 0.00% | −596−60.9% | Reduced |
| Royal Bank of Canada | 435 | $6.00K | 0.00% | −3,053−87.5% | Reduced |
| Citadel Advisors LLC | 444 | $6.56K | 0.00% | +444 | New |
| Comerica Bank | 500 | $7.38K | 0.00% | 00.0% | Unchanged |
| Metropolitan Life Insurance Co | 581 | $8.58K | 0.00% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 865 | $12.8K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 980 | $14.5K | 0.00% | −306−23.8% | Reduced |
| California State Teachers Retirement System | 1,053 | $15.6K | 0.00% | −670−38.9% | Reduced |
| Russell Investments Group, Ltd. | 1,111 | $16.4K | 0.00% | +45+4.2% | Added |
| New York State Common Retirement Fund | 1,287 | $19.0K | 0.00% | 00.0% | Unchanged |
| GWM Advisors LLC | 1,406 | $20.8K | 0.00% | 00.0% | Unchanged |
| Citigroup Inc | 1,956 | $28.9K | 0.00% | +384+24.4% | Added |
| Lazard Asset Management LLC | 2,830 | $41.0K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 3,211 | $47.4K | 0.00% | +419+15.0% | Added |
| Bank of America Corp | 3,964 | $58.5K | 0.00% | −8,560−68.3% | Reduced |
| BNP Paribas Arbitrage, SA | 5,077 | $75.0K | 0.00% | +2,043+67.3% | Added |
| American International Group, Inc. | 5,160 | $76.2K | 0.00% | −44−0.8% | Reduced |
| MetLife Investment Management | 5,610 | $82.9K | 0.00% | 00.0% | Unchanged |
| Barclays PLC | 7,348 | $108.5K | 0.00% | −7,032−48.9% | Reduced |
| FMR LLC | 8,263 | $122.0K | 0.00% | −654−7.3% | Reduced |
| Aristides Capital LLC | 10,000 | $147.7K | 0.06% | +10,000 | New |
| Sherbrooke Park Advisers LLC | 10,006 | $147.8K | 0.03% | +10,006 | New |
| Martingale Asset Management L P | 10,520 | $155.4K | 0.00% | +10,520 | New |
| Schonfeld Strategic Advisors LLC | 10,800 | $159.5K | 0.00% | +10,800 | New |
| Jane Street Group, LLC | 11,124 | $164.3K | 0.00% | +11,124 | New |
| JPMorgan Chase & Co | 11,786 | $174.1K | 0.00% | +4,997+73.6% | Added |
| UBS Group AG | 12,442 | $183.8K | 0.00% | −775−5.9% | Reduced |
| Johnson Investment Counsel Inc | 13,480 | $199.1K | 0.00% | +13,480 | New |
| Rhumbline Advisers | 13,519 | $199.7K | 0.00% | −432−3.1% | Reduced |
| Nuveen Asset Management, LLC | 13,719 | $202.6K | 0.00% | 00.0% | Unchanged |
| Goldman Sachs Group Inc | 14,471 | $213.7K | 0.00% | −20,726−58.9% | Reduced |
| STRS Ohio | 19,000 | $280.0K | 0.00% | +15,700+475.8% | Added |
| Two Sigma Investments, LP | 20,401 | $301.3K | 0.00% | −1,433−6.6% | Reduced |
| Charles Schwab Investment Management Inc | 29,628 | $437.6K | 0.00% | 00.0% | Unchanged |
| Bridgeway Capital Management, LLC | 34,200 | $505.1K | 0.01% | 00.0% | Unchanged |
| Morgan Stanley | 39,442 | $582.6K | 0.00% | −70,096−64.0% | Reduced |
| Susquehanna International Group, LLP | 77,397 | $1.14M | 0.00% | −3,244−4.0% | Reduced |
| Bank of New York Mellon Corp | 94,895 | $1.40M | 0.00% | −5,302−5.3% | Reduced |
| Northern Trust Corp | 117,548 | $1.74M | 0.00% | +639+0.5% | Added |
| Yakira Capital Management, Inc. | 120,756 | $1.78M | 0.62% | +66,638+123.1% | Added |
| Renaissance Technologies LLC | 162,184 | $2.40M | 0.00% | +113,284+231.7% | Added |
| Wittenberg Investment Management, Inc. | 210,239 | $3.11M | 1.06% | 00.0% | Unchanged |
| State Street Corp | 246,853 | $3.65M | 0.00% | +50,148+25.5% | Added |
| Geode Capital Management, LLC | 272,015 | $4.02M | 0.00% | +12,069+4.6% | Added |
| Invesco Ltd. | 277,124 | $4.09M | 0.00% | +265,058+2,196.7% | Added |
| Sepio Capital, LP | 298,545 | $4.41M | 0.38% | −8,135−2.7% | Reduced |
| Madison Avenue Partners, LP | 387,221 | $5.72M | 0.92% | −165,864−30.0% | Reduced |
| Dimensional Fund Advisors LP | 398,001 | $5.88M | 0.00% | −37,644−8.6% | Reduced |
| Vanguard Group Inc | 620,847 | $9.17M | 0.00% | +11,893+2.0% | Added |
| BlackRock Inc. | 723,294 | $10.7M | 0.00% | −20,329−2.7% | Reduced |
| ADAR1 Capital Management, LLC | 902,350 | $13.3M | 3.64% | +352,932+64.2% | Added |
| Newtyn Management, LLC | 1,873,694 | $27.7M | 5.51% | 00.0% | Unchanged |
| Western Standard LLC | 2,172,513 | $32.1M | 30.25% | 00.0% | Unchanged |
| Sio Capital Management, LLC | 0 | $0 | 0.00% | −288,466−100.0% | Sold out |
| Indaba Capital Management, L.P. | 0 | $0 | 0.00% | −223,459−100.0% | Sold out |
| Rosalind Advisors, Inc. | 0 | $0 | 0.00% | −60,000−100.0% | Sold out |
| Kennedy Capital Management, Inc. | 0 | $0 | 0.00% | −46,202−100.0% | Sold out |
| Allspring Global Investments Holdings, LLC | 0 | $0 | 0.00% | −11,827−100.0% | Sold out |
| AJOVista, LLC | 0 | $0 | 0.00% | −1,544−100.0% | Sold out |
| Headlands Technologies LLC | 0 | $0 | 0.00% | −300−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −236−100.0% | Sold out |
| Federated Hermes, Inc. | 0 | $0 | 0.00% | −85−100.0% | Sold out |