Mersana Therapeutics, Inc.
MRSNDelisted Jan 6, 2026- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001442836
Mersana Therapeutics, Inc. was delisted on Jan 6, 2026; its insiders filed their last Form 4 on Jan 6, 2026; 51 institutions reported holding it in 13F filings for Q4 2025, worth $64.8M in total; no superinvestor held it.
13F holders, Q2 2023
Institutional positions in Mersana Therapeutics, 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
- 147
- −11 vs. Q1 2023
- Shares held
- 112.5M
- +5.89M (+5.5%) vs. Q1 2023
- Total value
- $370.2M
- −$67.0M (−15.3%) vs. Q1 2023
- New holders
- 33
- 56 more added
- Sold out
- 44
- 41 more reduced
Compare with Q1 2023: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MRSN 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 | 0 | $0 |
| Q1 2026 | 1 | $87 |
| Q4 2025 | 51 | $64.8M |
| Q3 2025 | 49 | $24.7M |
| Q2 2025 | 85 | $22.9M |
| Q1 2025 | 111 | $30.2M |
| Q4 2024 | 132 | $149.2M |
| Q3 2024 | 116 | $219.4M |
| Q2 2024 | 122 | $229.6M |
| Q1 2024 | 125 | $526.3M |
| Q4 2023 | 106 | $263.0M |
| Q3 2023 | 128 | $144.4M |
| Q2 2023 | 147 | $370.2M |
| Q1 2023 | 158 | $437.2M |
| Q4 2022 | 152 | $592.8M |
| Q3 2022 | 152 | $623.4M |
| Q2 2022 | 126 | $408.0M |
| Q1 2022 | 128 | $322.7M |
| Q4 2021 | 122 | $436.6M |
| Q3 2021 | 110 | $648.3M |
| Q2 2021 | 131 | $957.8M |
| Q1 2021 | 132 | $1.14B |
Institutions, Q2 2023
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q1 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| US Bancorp | 53 | $174 | 0.00% | +53 | New |
| Citadel Advisors LLC | 76 | $250 | 0.00% | −112,585−99.9% | Reduced |
| Parallel Advisors, LLC | 78 | $257 | 0.00% | 00.0% | Unchanged |
| North Star Investment Management Corp. | 150 | $494 | 0.00% | 00.0% | Unchanged |
| Daiwa Securities Group Inc. | 401 | $1.00K | 0.00% | 00.0% | Unchanged |
| Signaturefd, LLC | 369 | $1.21K | 0.00% | +369 | New |
| GWM Advisors LLC | 500 | $1.65K | 0.00% | 00.0% | Unchanged |
| China Universal Asset Management Co., Ltd. | 1,499 | $4.93K | 0.00% | +36+2.5% | Added |
| STRS Ohio | 2,500 | $8.00K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 2,822 | $9.28K | 0.00% | +2,212+362.6% | Added |
| Advisor Group Holdings, Inc. | 3,235 | $10.6K | 0.00% | 00.0% | Unchanged |
| Point72 Asset Management, L.P. | 3,477 | $11.4K | 0.00% | +3,477 | New |
| Allspring Global Investments Holdings, LLC | 4,681 | $15.4K | 0.00% | +2,851+155.8% | Added |
| PEAK6 Investments LLC | 5,000 | $16.4K | 0.00% | +5,000 | New |
| Allworth Financial LP | 5,055 | $16.6K | 0.00% | +5,055 | New |
| Metropolitan Life Insurance Co | 5,106 | $16.8K | 0.00% | +1,222+31.5% | Added |
| Ameritas Investment Partners, Inc. | 7,067 | $23.3K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 7,403 | $24.4K | 0.00% | −16,047−68.4% | Reduced |
| Belvedere Trading LLC | 8,081 | $26.6K | 0.01% | +8,081 | New |
| Empirical Asset Management, LLC | 10,000 | $32.9K | 0.03% | 00.0% | Unchanged |
| Boothbay Fund Management, LLC | 10,025 | $33.0K | 0.00% | +10,025 | New |
| Virtus ETF Advisers LLC | 11,386 | $37.5K | 0.02% | −2,786−19.7% | Reduced |
| Y-Intercept (Hong Kong) Ltd | 11,649 | $38.3K | 0.00% | +11,649 | New |
| Martingale Asset Management L P | 12,114 | $39.9K | 0.00% | +40.0% | Added |
| Dynamic Technology Lab Private Ltd | 12,869 | $42.0K | 0.01% | −5,568−30.2% | Reduced |
| Amalgamated Bank | 12,679 | $42.0K | 0.00% | +3,288+35.0% | Added |
| Royal Bank of Canada | 12,881 | $42.0K | 0.00% | +7,657+146.6% | Added |
| Tocqueville Asset Management L.P. | 13,000 | $42.8K | 0.00% | +13,000 | New |
| Mirabella Financial Services LLP | 14,472 | $47.6K | 0.01% | +14,472 | New |
| Exchange Traded Concepts, LLC | 15,301 | $50.3K | 0.00% | +15,301 | New |
| Grimes & Company, Inc. | 15,740 | $51.8K | 0.00% | +134+0.9% | Added |
| Delphia (USA) Inc. | 16,992 | $55.9K | 0.09% | −7,373−30.3% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 17,459 | $57.4K | 0.00% | +5,212+42.6% | Added |
| E Fund Management Co., Ltd. | 18,105 | $60.0K | 0.00% | −9,473−34.3% | Reduced |
| ProShare Advisors LLC | 20,451 | $67.3K | 0.00% | +2,069+11.3% | Added |
| Harbor Capital Advisors, Inc. | 21,339 | $70.2K | 0.01% | +21,339 | New |
| Teacher Retirement System of Texas | 22,187 | $73.0K | 0.00% | −2,402−9.8% | Reduced |
| Jump Financial, LLC | 22,392 | $73.7K | 0.00% | +22,392 | New |
| Arizona State Retirement System | 22,977 | $75.6K | 0.00% | −151−0.7% | Reduced |
| Jasper Ridge Partners, L.P. | 23,100 | $76.0K | 0.00% | 00.0% | Unchanged |
| Prio Wealth Limited Partnership | 23,529 | $77.4K | 0.00% | 00.0% | Unchanged |
| Pale Fire Capital SE | 25,400 | $83.6K | 0.01% | +25,400 | New |
| State Board of Administration of Florida Retirement System | 28,482 | $93.7K | 0.00% | +1,080+3.9% | Added |
| Principal Financial Group Inc | 30,339 | $99.8K | 0.00% | +4,877+19.2% | Added |
| Janus Henderson Group PLC | 30,616 | $100.6K | 0.00% | −40−0.1% | Reduced |
| Corton Capital Inc. | 32,937 | $108.4K | 0.05% | +2,874+9.6% | Added |
| New York State Common Retirement Fund | 36,993 | $121.7K | 0.00% | −115−0.3% | Reduced |
| Invesco Ltd. | 38,616 | $127.0K | 0.00% | +5,805+17.7% | Added |
| Jefferies Financial Group Inc. | 39,975 | $131.5K | 0.00% | +39,975 | New |
| Engineers Gate Manager LP | 40,740 | $134.0K | 0.01% | −28,420−41.1% | Reduced |
| Manufacturers Life Insurance Company, The | 40,866 | $134.4K | 0.00% | +5,269+14.8% | Added |
| Great West Life Assurance Co | 44,554 | $147.0K | 0.00% | 00.0% | Unchanged |
| MetLife Investment Management | 46,642 | $153.5K | 0.00% | 00.0% | Unchanged |
| American International Group, Inc. | 48,298 | $158.9K | 0.00% | +3,628+8.1% | Added |
| Ikarian Capital, LLC | 50,000 | $164.5K | 0.06% | +50,000 | New |
| Voya Investment Management LLC | 56,707 | $186.6K | 0.00% | −445,452−88.7% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 57,099 | $186.8K | 0.00% | −6,966−10.9% | Reduced |
| Thrivent Financial for Lutherans | 58,073 | $191.0K | 0.00% | −2,849−4.7% | Reduced |
| Ghost Tree Capital, LLC | 61,250 | $201.5K | 0.07% | +61,250 | New |
| Profund Advisors LLC | 61,786 | $203.3K | 0.01% | −28,309−31.4% | Reduced |
| QVT Financial LP | 62,657 | $206.1K | 0.01% | 00.0% | Unchanged |
| Simplex Trading, LLC | 65,850 | $216.0K | 0.01% | +20,308+44.6% | Added |
| State of Wisconsin Investment Board | 70,024 | $230.4K | 0.00% | −3,614−4.9% | Reduced |
| AQR Capital Management LLC | 72,043 | $237.0K | 0.00% | +38,141+112.5% | Added |
| Legal & General Group Plc | 72,837 | $239.6K | 0.00% | +36,387+99.8% | Added |
| Graham Capital Management, L.P. | 73,744 | $242.6K | 0.01% | +73,744 | New |
| BNP Paribas Arbitrage, SA | 74,002 | $243.5K | 0.00% | −147,706−66.6% | Reduced |
| Alps Advisors Inc | 84,080 | $276.6K | 0.00% | +12,909+18.1% | Added |
| Skandinaviska Enskilda Banken AB (publ) | 93,132 | $306.0K | 0.00% | +34,663+59.3% | Added |
| Russell Investments Group, Ltd. | 99,764 | $328.2K | 0.00% | +81,367+442.3% | Added |
| Wells Fargo & Company | 102,903 | $338.6K | 0.00% | +5,628+5.8% | Added |
| California State Teachers Retirement System | 105,346 | $346.6K | 0.00% | +815+0.8% | Added |
| Price T Rowe Associates Inc | 119,345 | $394.0K | 0.00% | −2,032−1.7% | Reduced |
| Citigroup Inc | 125,628 | $413.3K | 0.00% | −293,644−70.0% | Reduced |
| UBS Asset Management Americas Inc | 102,575 | $421.6K | 0.00% | 00.0% | Unchanged |
| Federated Hermes, Inc. | 140,645 | $462.7K | 0.00% | +140,645 | New |
| Credit Suisse AG | 148,463 | $488.4K | 0.00% | +44,584+42.9% | Added |
| Nomura Holdings Inc | 148,979 | $490.1K | 0.00% | +148,979 | New |
| Macquarie Group Ltd | 150,000 | $494.0K | 0.00% | 00.0% | Unchanged |
| Walleye Capital LLC | 154,899 | $509.6K | 0.01% | −68,489−30.7% | Reduced |
| Group One Trading, L.P. | 160,303 | $527.4K | 0.02% | +158,204+7,537.1% | Added |
| Rhumbline Advisers | 164,871 | $542.4K | 0.00% | +6,530+4.1% | Added |
| UBS Group AG | 173,617 | $571.2K | 0.00% | −11,782−6.4% | Reduced |
| Swiss National Bank | 178,096 | $585.9K | 0.00% | +5,800+3.4% | Added |
| Caption Management, LLC | 181,000 | $595.5K | 0.10% | −114,900−38.8% | Reduced |
| Cubist Systematic Strategies, LLC | 186,398 | $613.2K | 0.01% | −124,543−40.1% | Reduced |
| Barclays PLC | 186,929 | $615.0K | 0.00% | −11,104−5.6% | Reduced |
| Dimensional Fund Advisors LP | 189,611 | $623.7K | 0.00% | −229,726−54.8% | Reduced |
| Qube Research & Technologies Ltd | 204,106 | $671.5K | 0.00% | −47,690−18.9% | Reduced |
| Alliancebernstein L.P. | 216,720 | $713.0K | 0.00% | +117,020+117.4% | Added |
| Algert Global LLC | 219,846 | $723.3K | 0.03% | +188,500+601.4% | Added |
| Two Sigma Investments, LP | 267,270 | $879.3K | 0.00% | +62,686+30.6% | Added |
| Panagora Asset Management Inc | 271,501 | $893.2K | 0.01% | +55,304+25.6% | Added |
| Susquehanna International Group, LLP | 292,317 | $961.7K | 0.00% | +18,031+6.6% | Added |
| Bank of America Corp | 301,493 | $991.9K | 0.00% | −714,391−70.3% | Reduced |
| Jane Street Group, LLC | 314,483 | $1.03M | 0.00% | +314,483 | New |
| Schonfeld Strategic Advisors LLC | 320,540 | $1.05M | 0.01% | +320,540 | New |
| Rafferty Asset Management, LLC | 336,656 | $1.11M | 0.01% | −149,052−30.7% | Reduced |
| Bank of New York Mellon Corp | 376,671 | $1.24M | 0.00% | +6,885+1.9% | Added |
| Gsa Capital Partners LLP | 387,591 | $1.27M | 0.13% | +183,115+89.6% | Added |