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 2023
Institutional positions in Merrimack Pharmaceuticals Inc as of Mar 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
- 50
- +3 vs. Q4 2022
- Shares held
- 7.40M
- −152.9K (−2.0%) vs. Q4 2022
- Total value
- $91.0M
- +$4.41M (+5.1%) vs. Q4 2022
- New holders
- 10
- 14 more added
- Sold out
- 7
- 9 more reduced
Compare with Q4 2022: 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 2023
Shares, value and share of portfolio for each institution holding Merrimack Pharmaceuticals Inc; share changes are against Q4 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Newtyn Management, LLC | 1,873,694 | $23.0M | 4.52% | +105,300+6.0% | Added |
| Western Standard LLC | 1,672,463 | $20.6M | 20.85% | +142,969+9.3% | Added |
| Madison Avenue Partners, LP | 553,085 | $6.80M | 1.46% | +553,085 | New |
| Dimensional Fund Advisors LP | 466,140 | $5.73M | 0.00% | −5,233−1.1% | Reduced |
| Vanguard Group Inc | 458,521 | $5.64M | 0.00% | −129,500−22.0% | Reduced |
| Sepio Capital, LP | 294,545 | $3.62M | 0.33% | 00.0% | Unchanged |
| Sio Capital Management, LLC | 272,843 | $3.35M | 1.66% | +22,843+9.1% | Added |
| BlackRock Inc. | 222,253 | $2.73M | 0.00% | +12,495+6.0% | Added |
| Invesco Ltd. | 210,507 | $2.59M | 0.00% | +210,507 | New |
| Wittenberg Investment Management, Inc. | 197,994 | $2.43M | 0.91% | +6,800+3.6% | Added |
| Nantahala Capital Management, LLC | 191,266 | $2.35M | 0.23% | −18,734−8.9% | Reduced |
| Susquehanna International Group, LLP | 138,995 | $1.71M | 0.00% | −116,341−45.6% | Reduced |
| Geode Capital Management, LLC | 130,164 | $1.60M | 0.00% | −4,062−3.0% | Reduced |
| Boothbay Fund Management, LLC | 117,436 | $1.44M | 0.04% | +53,225+82.9% | Added |
| Marshall Wace, LLP | 98,255 | $1.21M | 0.00% | +98,255 | New |
| Bank of New York Mellon Corp | 74,880 | $920.3K | 0.00% | 00.0% | Unchanged |
| Yakira Capital Management, Inc. | 72,118 | $886.3K | 0.23% | −13,614−15.9% | Reduced |
| Morgan Stanley | 54,160 | $665.6K | 0.00% | +44,997+491.1% | Added |
| State Street Corp | 50,556 | $621.3K | 0.00% | +1,700+3.5% | Added |
| Millennium Management LLC | 40,204 | $494.0K | 0.00% | +23,219+136.7% | Added |
| Jane Street Group, LLC | 37,307 | $458.5K | 0.00% | +37,307 | New |
| Goldman Sachs Group Inc | 34,898 | $428.9K | 0.00% | +20,756+146.8% | Added |
| Bridgeway Capital Management, LLC | 34,200 | $420.3K | 0.01% | 00.0% | Unchanged |
| Northern Trust Corp | 27,948 | $343.5K | 0.00% | +2,126+8.2% | Added |
| Brown Advisory Inc | 15,029 | $184.7K | 0.00% | 00.0% | Unchanged |
| Kennedy Capital Management, Inc. | 13,758 | $169.1K | 0.00% | +13,758 | New |
| Belvedere Trading LLC | 10,888 | $133.8K | 0.06% | −28,102−72.1% | Reduced |
| Citadel Advisors LLC | 8,491 | $104.4K | 0.00% | +8,491 | New |
| Barclays PLC | 5,438 | $66.8K | 0.00% | +5,303+3,928.1% | Added |
| Mascoma Wealth Management LLC | 5,000 | $62.0K | 0.02% | 00.0% | Unchanged |
| Lazard Asset Management LLC | 4,951 | $60.0K | 0.00% | +4,951 | New |
| UBS Group AG | 3,128 | $38.4K | 0.00% | +2,353+303.6% | Added |
| Dorsey Wright & Associates | 1,799 | $22.1K | 0.01% | +1,799 | New |
| Webster Bank, N. A. | 1,527 | $18.8K | 0.00% | 00.0% | Unchanged |
| Bank of America Corp | 1,493 | $18.3K | 0.00% | −186−11.1% | Reduced |
| GWM Advisors LLC | 1,406 | $17.3K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 1,235 | $15.0K | 0.00% | −2,007−61.9% | Reduced |
| Dark Forest Capital Management LP | 1,060 | $13.0K | 0.00% | +1,060 | New |
| Baldwin Brothers Inc | 500 | $6.14K | 0.00% | 00.0% | Unchanged |
| 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 |
| Wells Fargo & Company | 170 | $2.09K | 0.00% | +2+1.2% | Added |
| FMR LLC | 170 | $2.09K | 0.00% | +170 | 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 |
| Armstrong Advisory Group, Inc | 45 | $554 | 0.00% | 00.0% | Unchanged |
| AdvisorNet Financial, Inc | 20 | $246 | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 8 | $0 | 0.00% | 00.0% | Unchanged |
| 22NW, LP | 0 | $0 | 0.00% | −1,015,048−100.0% | Sold out |
| OrbiMed Advisors LLC | 0 | $0 | 0.00% | −73,600−100.0% | Sold out |
| Pura Vida Investments, LLC | 0 | $0 | 0.00% | −64,100−100.0% | Sold out |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −42,490−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −11,181−100.0% | Sold out |
| Freedom Wealth Alliance, LLC | 0 | $0 | 0.00% | −1,820−100.0% | Sold out |
| JPMorgan Chase & Co | 0 | $0 | 0.00% | −354−100.0% | Sold out |