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, Q3 2023
Institutional positions in Mersana Therapeutics, Inc. as of Sep 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
- 128
- −19 vs. Q2 2023
- Shares held
- 113.7M
- +1.24M (+1.1%) vs. Q2 2023
- Total value
- $144.4M
- −$225.8M (−61.0%) vs. Q2 2023
- New holders
- 26
- 35 more added
- Sold out
- 45
- 43 more reduced
Compare with Q2 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, Q3 2023
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q2 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| North Star Investment Management Corp. | 150 | $190 | 0.00% | 00.0% | Unchanged |
| Daiwa Securities Group Inc. | 401 | $1.00K | 0.00% | 00.0% | Unchanged |
| FNY Investment Advisers, LLC | 1,100 | $1.00K | 0.00% | +1,100 | New |
| Russell Investments Group, Ltd. | 878 | $1.11K | 0.00% | −98,886−99.1% | Reduced |
| Federated Hermes, Inc. | 1,392 | $1.77K | 0.00% | −139,253−99.0% | Reduced |
| Citigroup Inc | 1,735 | $2.20K | 0.00% | −123,893−98.6% | Reduced |
| STRS Ohio | 2,500 | $3.00K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 3,043 | $3.87K | 0.00% | +221+7.8% | Added |
| China Universal Asset Management Co., Ltd. | 3,095 | $3.93K | 0.00% | +1,596+106.5% | Added |
| Advisor Group Holdings, Inc. | 3,927 | $4.98K | 0.00% | +692+21.4% | Added |
| Allworth Financial LP | 5,055 | $6.42K | 0.00% | 00.0% | Unchanged |
| Metropolitan Life Insurance Co | 5,106 | $6.49K | 0.00% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 9,896 | $12.6K | 0.00% | +2,829+40.0% | Added |
| Empirical Asset Management, LLC | 10,000 | $12.7K | 0.01% | 00.0% | Unchanged |
| Brevan Howard Capital Management LP | 10,238 | $13.0K | 0.00% | +10,238 | New |
| State of Wisconsin Investment Board | 10,254 | $13.0K | 0.00% | −59,770−85.4% | Reduced |
| Virtus ETF Advisers LLC | 10,358 | $13.2K | 0.01% | −1,028−9.0% | Reduced |
| Simplex Trading, LLC | 11,270 | $14.0K | 0.00% | −54,580−82.9% | Reduced |
| Two Sigma Securities, LLC | 11,847 | $15.0K | 0.00% | +11,847 | New |
| Amalgamated Bank | 12,679 | $16.0K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 14,930 | $19.0K | 0.00% | +2,049+15.9% | Added |
| Grimes & Company, Inc. | 16,136 | $20.5K | 0.00% | +396+2.5% | Added |
| Point72 Asset Management, L.P. | 17,040 | $21.6K | 0.00% | +13,563+390.1% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 17,459 | $22.2K | 0.00% | 00.0% | Unchanged |
| ProShare Advisors LLC | 21,550 | $27.4K | 0.00% | +1,099+5.4% | Added |
| Fox Run Management, L.L.C. | 21,830 | $27.7K | 0.01% | +21,830 | New |
| Virtu Financial LLC | 21,785 | $28.0K | 0.00% | +21,785 | New |
| Wells Fargo & Company | 23,025 | $29.2K | 0.00% | −79,878−77.6% | Reduced |
| Jasper Ridge Partners, L.P. | 23,100 | $29.3K | 0.00% | 00.0% | Unchanged |
| Prio Wealth Limited Partnership | 23,529 | $29.9K | 0.00% | 00.0% | Unchanged |
| Point72 Middle East FZE | 24,344 | $30.9K | 0.00% | +24,344 | New |
| Teacher Retirement System of Texas | 24,067 | $31.0K | 0.00% | +1,880+8.5% | Added |
| Arizona State Retirement System | 24,427 | $31.0K | 0.00% | +1,450+6.3% | Added |
| Engineers Gate Manager LP | 25,088 | $31.9K | 0.00% | −15,652−38.4% | Reduced |
| Pale Fire Capital SE | 25,400 | $32.3K | 0.00% | 00.0% | Unchanged |
| Janus Henderson Group PLC | 30,649 | $38.8K | 0.00% | +33+0.1% | Added |
| Principal Financial Group Inc | 31,751 | $40.3K | 0.00% | +1,412+4.7% | Added |
| Barclays PLC | 34,154 | $43.4K | 0.00% | −152,775−81.7% | Reduced |
| Hunter Perkins Capital Management, LLC | 37,000 | $47.0K | 0.01% | +37,000 | New |
| Harbor Capital Advisors, Inc. | 37,062 | $47.1K | 0.01% | +15,723+73.7% | Added |
| New York State Common Retirement Fund | 37,356 | $47.4K | 0.00% | +363+1.0% | Added |
| Manufacturers Life Insurance Company, The | 41,657 | $52.9K | 0.00% | +791+1.9% | Added |
| Group One Trading, L.P. | 42,068 | $53.4K | 0.00% | −118,235−73.8% | Reduced |
| Voya Investment Management LLC | 43,631 | $55.4K | 0.00% | −13,076−23.1% | Reduced |
| Great West Life Assurance Co | 44,554 | $56.0K | 0.00% | 00.0% | Unchanged |
| Y-Intercept (Hong Kong) Ltd | 45,229 | $57.4K | 0.01% | +33,580+288.3% | Added |
| SG Americas Securities, LLC | 46,640 | $59.0K | 0.00% | +46,640 | New |
| MetLife Investment Management | 46,642 | $59.2K | 0.00% | 00.0% | Unchanged |
| Graham Capital Management, L.P. | 46,824 | $59.5K | 0.00% | −26,920−36.5% | Reduced |
| Tower Research Capital LLC (TRC) | 48,309 | $61.4K | 0.00% | +40,906+552.6% | Added |
| American International Group, Inc. | 52,520 | $66.7K | 0.00% | +4,222+8.7% | Added |
| Legal & General Group Plc | 53,162 | $67.5K | 0.00% | −19,675−27.0% | Reduced |
| UBS Group AG | 56,943 | $72.3K | 0.00% | −116,674−67.2% | Reduced |
| Cubist Systematic Strategies, LLC | 60,757 | $77.2K | 0.00% | −125,641−67.4% | Reduced |
| Ghost Tree Capital, LLC | 61,250 | $77.8K | 0.04% | 00.0% | Unchanged |
| QVT Financial LP | 62,657 | $79.6K | 0.00% | 00.0% | Unchanged |
| Deutsche Bank AG | 62,827 | $79.8K | 0.00% | −1,074,916−94.5% | Reduced |
| HRT Financial LP | 64,179 | $81.0K | 0.00% | +64,179 | New |
| Invesco Ltd. | 65,032 | $82.6K | 0.00% | +26,416+68.4% | Added |
| Nuveen Asset Management, LLC | 65,881 | $83.7K | 0.00% | −1,175,710−94.7% | Reduced |
| D. E. Shaw & Co., Inc. | 67,782 | $86.1K | 0.00% | −917,957−93.1% | Reduced |
| Exchange Traded Concepts, LLC | 73,694 | $93.6K | 0.00% | +58,393+381.6% | Added |
| XTX Topco Ltd | 79,215 | $100.6K | 0.02% | +79,215 | New |
| Price T Rowe Associates Inc | 87,113 | $111.0K | 0.00% | −32,232−27.0% | Reduced |
| Alps Advisors Inc | 88,919 | $112.9K | 0.00% | +4,839+5.8% | Added |
| California State Teachers Retirement System | 98,959 | $125.7K | 0.00% | −6,387−6.1% | Reduced |
| Acuta Capital Partners, LLC | 99,607 | $126.5K | 0.09% | +99,607 | New |
| Gsa Capital Partners LLP | 101,788 | $129.0K | 0.01% | −285,803−73.7% | Reduced |
| UBS Asset Management Americas Inc | 102,575 | $130.3K | 0.00% | 00.0% | Unchanged |
| Dimensional Fund Advisors LP | 112,218 | $142.5K | 0.00% | −77,393−40.8% | Reduced |
| Bank of America Corp | 117,372 | $149.1K | 0.00% | −184,121−61.1% | Reduced |
| Walleye Trading LLC | 121,502 | $154.3K | 0.00% | +121,502 | New |
| BNP Paribas Arbitrage, SA | 123,345 | $156.6K | 0.00% | +49,343+66.7% | Added |
| Credit Suisse AG | 129,067 | $163.9K | 0.00% | −19,396−13.1% | Reduced |
| Alliancebernstein L.P. | 130,740 | $166.0K | 0.00% | −85,980−39.7% | Reduced |
| AQR Capital Management LLC | 143,172 | $181.8K | 0.00% | +71,129+98.7% | Added |
| Two Sigma Investments, LP | 149,066 | $189.3K | 0.00% | −118,204−44.2% | Reduced |
| Macquarie Group Ltd | 150,000 | $191.0K | 0.00% | 00.0% | Unchanged |
| Marshall Wace, LLP | 157,800 | $200.4K | 0.00% | −2,553,510−94.2% | Reduced |
| Rhumbline Advisers | 160,076 | $203.3K | 0.00% | −4,795−2.9% | Reduced |
| Verition Fund Management LLC | 163,451 | $207.6K | 0.00% | +163,451 | New |
| Swiss National Bank | 178,096 | $226.2K | 0.00% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 180,852 | $229.7K | 0.00% | −111,465−38.1% | Reduced |
| Los Angeles Capital Management LLC | 197,470 | $250.8K | 0.00% | +197,470 | New |
| Panagora Asset Management Inc | 251,793 | $319.8K | 0.00% | −19,708−7.3% | Reduced |
| JPMorgan Chase & Co | 267,015 | $339.1K | 0.00% | −1,176,779−81.5% | Reduced |
| Jane Street Group, LLC | 273,005 | $346.7K | 0.00% | −41,478−13.2% | Reduced |
| Atom Investors LP | 293,177 | $372.3K | 0.08% | +293,177 | New |
| Charles Schwab Investment Management Inc | 294,405 | $373.9K | 0.00% | −526,283−64.1% | Reduced |
| UBS Oconnor LLC | 296,414 | $376.4K | 0.01% | +296,414 | New |
| Goldman Sachs Group Inc | 337,053 | $428.1K | 0.00% | −1,058,965−75.9% | Reduced |
| Boothbay Fund Management, LLC | 340,545 | $432.5K | 0.02% | +330,520+3,297.0% | Added |
| Acadian Asset Management LLC | 354,075 | $449.0K | 0.00% | +354,075 | New |
| Two Sigma Advisers, LP | 360,700 | $458.1K | 0.00% | −217,400−37.6% | Reduced |
| Bank of New York Mellon Corp | 375,756 | $477.2K | 0.00% | −915−0.2% | Reduced |
| Rhenman & Partners Asset Management AB | 400,000 | $508.0K | 0.05% | 00.0% | Unchanged |
| Sarissa Capital Management LP | 550,000 | $698.5K | 0.09% | −2,082,900−79.1% | Reduced |
| FMR LLC | 579,789 | $736.3K | 0.00% | −899,708−60.8% | Reduced |
| Bridgeway Capital Management, LLC | 581,700 | $738.8K | 0.02% | +581,700 | New |
| Newtyn Management, LLC | 700,000 | $889.0K | 0.22% | +700,000 | New |