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 2023
Institutional positions in Merrimack Pharmaceuticals Inc as of Jun 30, 2023. 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
- 62
- +12 vs. Q1 2023
- Shares held
- 8.01M
- +603.6K (+8.2%) vs. Q1 2023
- Total value
- $98.5M
- +$7.50M (+8.2%) vs. Q1 2023
- New holders
- 18
- 18 more added
- Sold out
- 6
- 10 more reduced
Compare with Q1 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 | $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 2023
Shares, value and share of portfolio for each institution holding Merrimack Pharmaceuticals Inc; share changes are against Q1 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Newtyn Management, LLC | 1,873,694 | $23.0M | 5.44% | 00.0% | Unchanged |
| Western Standard LLC | 1,672,463 | $20.6M | 17.86% | 00.0% | Unchanged |
| BlackRock Inc. | 676,290 | $8.32M | 0.00% | +454,037+204.3% | Added |
| Vanguard Group Inc | 556,798 | $6.85M | 0.00% | +98,277+21.4% | Added |
| Madison Avenue Partners, LP | 553,085 | $6.80M | 1.48% | 00.0% | Unchanged |
| Dimensional Fund Advisors LP | 459,960 | $5.66M | 0.00% | −6,180−1.3% | Reduced |
| Sepio Capital, LP | 294,545 | $3.62M | 0.29% | 00.0% | Unchanged |
| Sio Capital Management, LLC | 290,749 | $3.58M | 1.26% | +17,906+6.6% | Added |
| Geode Capital Management, LLC | 243,802 | $3.00M | 0.00% | +113,638+87.3% | Added |
| Wittenberg Investment Management, Inc. | 204,994 | $2.52M | 0.91% | +7,000+3.5% | Added |
| State Street Corp | 174,105 | $2.14M | 0.00% | +123,549+244.4% | Added |
| Northern Trust Corp | 115,992 | $1.43M | 0.00% | +88,044+315.0% | Added |
| Nantahala Capital Management, LLC | 111,148 | $1.37M | 0.17% | −80,118−41.9% | Reduced |
| Bank of New York Mellon Corp | 100,317 | $1.23M | 0.00% | +25,437+34.0% | Added |
| Kennedy Capital Management, Inc. | 91,506 | $1.13M | 0.03% | +77,748+565.1% | Added |
| Marshall Wace, LLP | 87,037 | $1.07M | 0.00% | −11,218−11.4% | Reduced |
| Morgan Stanley | 82,685 | $1.02M | 0.00% | +28,525+52.7% | Added |
| Susquehanna International Group, LLP | 73,615 | $905.5K | 0.00% | −65,380−47.0% | Reduced |
| Yakira Capital Management, Inc. | 64,118 | $788.7K | 0.21% | −8,000−11.1% | Reduced |
| Boothbay Fund Management, LLC | 46,437 | $571.2K | 0.02% | −70,999−60.5% | Reduced |
| Bridgeway Capital Management, LLC | 34,200 | $420.7K | 0.01% | 00.0% | Unchanged |
| Charles Schwab Investment Management Inc | 29,628 | $364.4K | 0.00% | +29,628 | New |
| Connor, Clark & Lunn Investment Management Ltd. | 14,405 | $177.2K | 0.00% | +14,405 | New |
| Goldman Sachs Group Inc | 14,142 | $173.9K | 0.00% | −20,756−59.5% | Reduced |
| Nuveen Asset Management, LLC | 13,719 | $168.7K | 0.00% | +13,719 | New |
| Rhumbline Advisers | 12,566 | $154.6K | 0.00% | +12,566 | New |
| Fifth Lane Capital, LP | 10,929 | $134.4K | 0.13% | +10,929 | New |
| Millennium Management LLC | 10,749 | $132.2K | 0.00% | −29,455−73.3% | Reduced |
| Tower Research Capital LLC (TRC) | 10,567 | $130.0K | 0.00% | +9,332+755.6% | Added |
| JPMorgan Chase & Co | 8,344 | $102.6K | 0.00% | +8,344 | New |
| New York State Common Retirement Fund | 8,100 | $99.6K | 0.00% | +8,100 | New |
| UBS Group AG | 6,559 | $80.7K | 0.00% | +3,431+109.7% | Added |
| Barclays PLC | 5,617 | $69.1K | 0.00% | +179+3.3% | Added |
| MetLife Investment Management | 5,610 | $69.0K | 0.00% | +5,610 | New |
| American International Group, Inc. | 5,039 | $62.0K | 0.00% | +5,039 | New |
| Mascoma Wealth Management LLC | 5,000 | $61.1K | 0.02% | 00.0% | Unchanged |
| Wells Fargo & Company | 4,446 | $54.7K | 0.00% | +4,276+2,515.3% | Added |
| Bank of America Corp | 3,815 | $46.9K | 0.00% | +2,322+155.5% | Added |
| Citadel Advisors LLC | 3,697 | $45.5K | 0.00% | −4,794−56.5% | Reduced |
| California State Teachers Retirement System | 3,483 | $42.8K | 0.00% | +3,483 | New |
| Citigroup Inc | 3,117 | $38.3K | 0.00% | +3,117 | New |
| Lazard Asset Management LLC | 3,123 | $38.0K | 0.00% | −1,828−36.9% | Reduced |
| BNP Paribas Arbitrage, SA | 2,726 | $33.5K | 0.00% | +2,726 | New |
| Dorsey Wright & Associates | 2,000 | $24.6K | 0.01% | +201+11.2% | Added |
| Amalgamated Bank | 1,587 | $20.0K | 0.00% | +1,587 | New |
| Webster Bank, N. A. | 1,527 | $18.8K | 0.00% | 00.0% | Unchanged |
| GWM Advisors LLC | 1,406 | $17.3K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 1,286 | $15.8K | 0.00% | +1,286 | New |
| Royal Bank of Canada | 1,255 | $15.0K | 0.00% | +1,247+15,587.5% | Added |
| Ameritas Investment Partners, Inc. | 865 | $10.6K | 0.00% | +865 | New |
| Metropolitan Life Insurance Co | 581 | $7.15K | 0.00% | +581 | New |
| FMR LLC | 336 | $4.13K | 0.00% | +166+97.6% | Added |
| Kayne Anderson Rudnick Investment Management LLC | 300 | $3.69K | 0.00% | 00.0% | Unchanged |
| Sandy Spring Bank | 300 | $3.69K | 0.00% | 00.0% | Unchanged |
| Rise Advisors, LLC | 272 | $3.34K | 0.00% | 00.0% | Unchanged |
| CWM, LLC | 275 | $3.00K | 0.00% | +275 | New |
| TSFG, LLC | 160 | $2.00K | 0.00% | 00.0% | Unchanged |
| Federated Hermes, Inc. | 90 | $1.11K | 0.00% | 00.0% | Unchanged |
| Horrell Capital Management, Inc. | 50 | $1.00K | 0.00% | 00.0% | Unchanged |
| Covestor Ltd | 87 | $1.00K | 0.00% | +87 | New |
| Armstrong Advisory Group, Inc | 45 | $554 | 0.00% | 00.0% | Unchanged |
| AdvisorNet Financial, Inc | 20 | $246 | 0.00% | 00.0% | Unchanged |
| Invesco Ltd. | 0 | $0 | 0.00% | −210,507−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −37,307−100.0% | Sold out |
| Brown Advisory Inc | 0 | $0 | 0.00% | −15,029−100.0% | Sold out |
| Belvedere Trading LLC | 0 | $0 | 0.00% | −10,888−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −1,060−100.0% | Sold out |
| Baldwin Brothers Inc | 0 | $0 | 0.00% | −500−100.0% | Sold out |