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, Q4 2023
Institutional positions in Merrimack Pharmaceuticals Inc as of Dec 31, 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
- 67
- +4 vs. Q3 2023
- Shares held
- 9.31M
- +840.9K (+9.9%) vs. Q3 2023
- Total value
- $124.9M
- +$20.4M (+19.6%) vs. Q3 2023
- New holders
- 11
- 24 more added
- Sold out
- 7
- 11 more reduced
Compare with Q3 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, Q4 2023
Shares, value and share of portfolio for each institution holding Merrimack Pharmaceuticals Inc; share changes are against Q3 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Western Standard LLC | 2,172,513 | $29.1M | 27.47% | +278,500+14.7% | Added |
| Newtyn Management, LLC | 1,873,694 | $25.1M | 4.93% | 00.0% | Unchanged |
| BlackRock Inc. | 743,623 | $9.97M | 0.00% | +52,806+7.6% | Added |
| Vanguard Group Inc | 608,954 | $8.17M | 0.00% | +8,610+1.4% | Added |
| Madison Avenue Partners, LP | 553,085 | $7.42M | 1.05% | 00.0% | Unchanged |
| ADAR1 Capital Management, LLC | 549,418 | $7.37M | 3.30% | +549,418 | New |
| Dimensional Fund Advisors LP | 435,645 | $5.84M | 0.00% | −13,107−2.9% | Reduced |
| Sepio Capital, LP | 306,680 | $4.11M | 0.35% | 00.0% | Unchanged |
| Sio Capital Management, LLC | 288,466 | $3.87M | 1.00% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 259,946 | $3.49M | 0.00% | +8,361+3.3% | Added |
| Indaba Capital Management, L.P. | 223,459 | $3.00M | 1.72% | +86,657+63.3% | Added |
| Wittenberg Investment Management, Inc. | 210,239 | $2.82M | 0.98% | +500+0.2% | Added |
| State Street Corp | 196,705 | $2.64M | 0.00% | +4,861+2.5% | Added |
| Northern Trust Corp | 116,909 | $1.57M | 0.00% | +1,540+1.3% | Added |
| Morgan Stanley | 109,538 | $1.47M | 0.00% | +16,361+17.6% | Added |
| Bank of New York Mellon Corp | 100,197 | $1.34M | 0.00% | +494+0.5% | Added |
| Susquehanna International Group, LLP | 80,641 | $1.08M | 0.00% | −76,012−48.5% | Reduced |
| Rosalind Advisors, Inc. | 60,000 | $804.6K | 0.67% | +60,000 | New |
| Yakira Capital Management, Inc. | 54,118 | $725.7K | 0.24% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 48,900 | $656.0K | 0.00% | +48,900 | New |
| Kennedy Capital Management, Inc. | 46,202 | $619.6K | 0.01% | −47,506−50.7% | Reduced |
| Goldman Sachs Group Inc | 35,197 | $472.0K | 0.00% | +244+0.7% | Added |
| Bridgeway Capital Management, LLC | 34,200 | $458.6K | 0.01% | 00.0% | Unchanged |
| Charles Schwab Investment Management Inc | 29,628 | $397.3K | 0.00% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 21,834 | $292.8K | 0.00% | +21,834 | New |
| Barclays PLC | 14,380 | $192.8K | 0.00% | +12,535+679.4% | Added |
| Rhumbline Advisers | 13,951 | $187.1K | 0.00% | +72+0.5% | Added |
| Nuveen Asset Management, LLC | 13,719 | $184.0K | 0.00% | 00.0% | Unchanged |
| UBS Group AG | 13,217 | $177.2K | 0.00% | +7,369+126.0% | Added |
| Bank of America Corp | 12,524 | $167.9K | 0.00% | +6,470+106.9% | Added |
| Invesco Ltd. | 12,066 | $161.8K | 0.00% | +12,066 | New |
| Allspring Global Investments Holdings, LLC | 11,827 | $158.6K | 0.00% | +11,827 | New |
| FMR LLC | 8,917 | $119.6K | 0.00% | −409−4.4% | Reduced |
| JPMorgan Chase & Co | 6,789 | $91.0K | 0.00% | +20.0% | Added |
| MetLife Investment Management | 5,610 | $75.2K | 0.00% | 00.0% | Unchanged |
| American International Group, Inc. | 5,204 | $69.8K | 0.00% | −21−0.4% | Reduced |
| Royal Bank of Canada | 3,488 | $47.0K | 0.00% | +2,147+160.1% | Added |
| STRS Ohio | 3,300 | $44.0K | 0.00% | +3,300 | New |
| BNP Paribas Arbitrage, SA | 3,034 | $40.7K | 0.00% | +1,495+97.1% | Added |
| Wells Fargo & Company | 2,792 | $37.4K | 0.00% | +619+28.5% | Added |
| Lazard Asset Management LLC | 2,830 | $37.0K | 0.00% | −293−9.4% | Reduced |
| California State Teachers Retirement System | 1,723 | $23.1K | 0.00% | −587−25.4% | Reduced |
| Citigroup Inc | 1,572 | $21.1K | 0.00% | +1,548+6,450.0% | Added |
| AJOVista, LLC | 1,544 | $20.7K | 0.03% | +1,544 | New |
| Amalgamated Bank | 1,482 | $20.0K | 0.00% | −105−6.6% | Reduced |
| GWM Advisors LLC | 1,406 | $18.9K | 0.00% | 00.0% | Unchanged |
| New York State Common Retirement Fund | 1,287 | $17.3K | 0.00% | −6,920−84.3% | Reduced |
| Legal & General Group Plc | 1,286 | $17.2K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 1,266 | $17.0K | 0.00% | +102+8.8% | Added |
| Russell Investments Group, Ltd. | 1,066 | $14.3K | 0.00% | +202+23.4% | Added |
| Deutsche Bank AG | 979 | $13.1K | 0.00% | +69+7.6% | Added |
| Ameritas Investment Partners, Inc. | 865 | $11.6K | 0.00% | 00.0% | Unchanged |
| Metropolitan Life Insurance Co | 581 | $7.79K | 0.00% | 00.0% | Unchanged |
| Comerica Bank | 500 | $6.71K | 0.00% | 00.0% | Unchanged |
| Kayne Anderson Rudnick Investment Management LLC | 300 | $4.02K | 0.00% | 00.0% | Unchanged |
| Sandy Spring Bank | 300 | $4.02K | 0.00% | 00.0% | Unchanged |
| Headlands Technologies LLC | 300 | $4.02K | 0.00% | +300 | New |
| Rise Advisors, LLC | 272 | $3.64K | 0.00% | 00.0% | Unchanged |
| Group One Trading, L.P. | 236 | $3.17K | 0.00% | −4,292−94.8% | Reduced |
| TSFG, LLC | 160 | $2.00K | 0.00% | 00.0% | Unchanged |
| Federated Hermes, Inc. | 85 | $1.14K | 0.00% | −3−3.4% | Reduced |
| Horrell Capital Management, Inc. | 50 | $1.00K | 0.00% | 00.0% | Unchanged |
| Covestor Ltd | 106 | $1.00K | 0.00% | +19+21.8% | Added |
| Armstrong Advisory Group, Inc | 45 | $604 | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 15 | $201 | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 8 | $107 | 0.00% | +8 | New |
| GAMMA Investing LLC | 2 | $27 | 0.00% | +2 | New |
| Centiva Capital, LP | 0 | $0 | 0.00% | −187,803−100.0% | Sold out |
| Fifth Lane Capital, LP | 0 | $0 | 0.00% | −10,929−100.0% | Sold out |
| Mascoma Wealth Management LLC | 0 | $0 | 0.00% | −5,000−100.0% | Sold out |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −3,398−100.0% | Sold out |
| Dorsey Wright & Associates | 0 | $0 | 0.00% | −1,933−100.0% | Sold out |
| Webster Bank, N. A. | 0 | $0 | 0.00% | −1,527−100.0% | Sold out |
| AdvisorNet Financial, Inc | 0 | $0 | 0.00% | −20−100.0% | Sold out |