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, Q4 2024
Institutional positions in Mersana Therapeutics, Inc. as of Dec 31, 2024. 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
- 132
- +18 vs. Q3 2024
- Shares held
- 104.3M
- −11.3M (−9.7%) vs. Q3 2024
- Total value
- $149.2M
- −$69.2M (−31.7%) vs. Q3 2024
- New holders
- 30
- 33 more added
- Sold out
- 12
- 40 more reduced
2 institutions that held it in Q3 2024 haven't filed for Q4 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2024: 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, Q4 2024
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q3 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| CWM, LLC | 180 | $0 | 0.00% | +55+44.0% | Added |
| Farther Finance Advisors, LLC | 1 | $1 | 0.00% | 00.0% | Unchanged |
| Point72 Asia (Singapore) Pte. Ltd. | 1 | $1 | 0.00% | +1 | New |
| IFP Advisors, Inc | 2 | $3 | 0.00% | +2 | New |
| Frazier Financial Advisors, LLC | 5 | $8 | 0.00% | 00.0% | Unchanged |
| North Star Investment Management Corp. | 150 | $214 | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 200 | $286 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 218 | $312 | 0.00% | +218 | New |
| Signaturefd, LLC | 286 | $409 | 0.00% | +286 | New |
| Optiver Holding B.V. | 705 | $1.01K | 0.00% | +705 | New |
| R Squared Ltd | 1,060 | $1.52K | 0.00% | +1,060 | New |
| Sterling Capital Management LLC | 1,900 | $2.72K | 0.00% | +1,666+712.0% | Added |
| Point72 (DIFC) Ltd | 2,203 | $3.15K | 0.00% | +2,203 | New |
| Skopos Labs, Inc. | 2,517 | $3.60K | 0.00% | +2,517 | New |
| GF Fund Management Co. Ltd. | 2,594 | $3.71K | 0.00% | +2,594 | New |
| Picton Mahoney Asset Management | 2,871 | $4.00K | 0.00% | +377+15.1% | Added |
| Advisor Group Holdings, Inc. | 3,432 | $4.91K | 0.00% | 00.0% | Unchanged |
| Amalgamated Bank | 3,769 | $5.00K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 3,622 | $5.18K | 0.00% | +491+15.7% | Added |
| Smartleaf Asset Management LLC | 4,013 | $5.70K | 0.00% | −1,239−23.6% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 4,117 | $6.18K | 0.00% | +4,117 | New |
| California State Teachers Retirement System | 8,220 | $11.8K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 8,992 | $12.0K | 0.00% | −2,463−21.5% | Reduced |
| STRS Ohio | 8,700 | $12.4K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 8,959 | $12.8K | 0.00% | +4,596+105.3% | Added |
| Hunter Perkins Capital Management, LLC | 10,000 | $14.0K | 0.00% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 9,896 | $14.2K | 0.00% | 00.0% | Unchanged |
| CIBC World Markets Corp | 10,616 | $15.2K | 0.00% | +10,616 | New |
| Victory Capital Management Inc | 10,707 | $15.3K | 0.00% | −751−6.6% | Reduced |
| Wolverine Trading, LLC | 10,869 | $15.4K | 0.00% | +10,869 | New |
| Legal & General Group Plc | 11,097 | $15.9K | 0.00% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 11,812 | $16.9K | 0.00% | +1,047+9.7% | Added |
| Lazard Asset Management LLC | 12,104 | $17.0K | 0.00% | +12,104 | New |
| Squarepoint Ops LLC | 12,104 | $17.3K | 0.00% | −69,525−85.2% | Reduced |
| Bayesian Capital Management, LP | 12,600 | $18.0K | 0.00% | +12,600 | New |
| HSBC Holdings PLC | 13,301 | $18.3K | 0.00% | −664−4.8% | Reduced |
| Aquatic Capital Management LLC | 14,551 | $20.8K | 0.00% | +14,551 | New |
| Grimes & Company, Inc. | 14,998 | $21.4K | 0.00% | 00.0% | Unchanged |
| Marshall Wace, LLP | 15,600 | $22.3K | 0.00% | +15,600 | New |
| US Bancorp | 16,178 | $23.1K | 0.00% | 00.0% | Unchanged |
| Engineers Gate Manager LP | 17,084 | $24.4K | 0.00% | +17,084 | New |
| Public Employees Retirement System of Ohio | 20,587 | $29.4K | 0.00% | 00.0% | Unchanged |
| Police & Firemen's Retirement System of New Jersey | 22,593 | $32.3K | 0.00% | +22,593 | New |
| Jasper Ridge Partners, L.P. | 23,100 | $33.0K | 0.00% | 00.0% | Unchanged |
| Quarry LP | 24,000 | $34.3K | 0.01% | −6,000−20.0% | Reduced |
| China Universal Asset Management Co., Ltd. | 26,194 | $37.5K | 0.00% | +26,194 | New |
| Atom Investors LP | 26,563 | $38.0K | 0.00% | +1,902+7.7% | Added |
| State Board of Administration of Florida Retirement System | 28,800 | $41.2K | 0.00% | 00.0% | Unchanged |
| Walleye Trading LLC | 31,526 | $45.1K | 0.00% | 00.0% | Unchanged |
| Voya Investment Management LLC | 36,190 | $51.8K | 0.00% | −2,111−5.5% | Reduced |
| New York State Common Retirement Fund | 37,235 | $53.2K | 0.00% | 00.0% | Unchanged |
| ProShare Advisors LLC | 37,799 | $54.1K | 0.00% | +16,364+76.3% | Added |
| Manufacturers Life Insurance Company, The | 43,990 | $62.9K | 0.00% | −483−1.1% | Reduced |
| Cubist Systematic Strategies, LLC | 45,296 | $64.8K | 0.00% | +45,296 | New |
| Graham Capital Management, L.P. | 49,724 | $71.1K | 0.00% | +7,307+17.2% | Added |
| Susquehanna International Group, LLP | 49,853 | $71.3K | 0.00% | −24,956−33.4% | Reduced |
| Intech Investment Management LLC | 51,028 | $73.0K | 0.00% | +23,686+86.6% | Added |
| Prelude Capital Management, LLC | 51,357 | $73.4K | 0.01% | −313,370−85.9% | Reduced |
| Group One Trading, L.P. | 52,283 | $74.8K | 0.00% | +19,713+60.5% | Added |
| Ameriprise Financial Inc | 53,329 | $76.3K | 0.00% | +7,682+16.8% | Added |
| Invesco Ltd. | 54,872 | $78.5K | 0.00% | −611−1.1% | Reduced |
| Avanza Fonder AB | 56,298 | $80.5K | 0.00% | +56,298 | New |
| Corebridge Financial, Inc. | 56,398 | $80.6K | 0.00% | −4,257−7.0% | Reduced |
| Algert Global LLC | 60,083 | $85.9K | 0.00% | −3,400−5.4% | Reduced |
| Price T Rowe Associates Inc | 62,093 | $89.0K | 0.00% | −36,985−37.3% | Reduced |
| QVT Financial LP | 62,657 | $89.6K | 0.01% | 00.0% | Unchanged |
| XTX Topco Ltd | 63,530 | $90.8K | 0.01% | −283,725−81.7% | Reduced |
| Oxford Asset Management LLP | 65,386 | $93.5K | 0.04% | +65,386 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 65,936 | $94.3K | 0.00% | +2,812+4.5% | Added |
| Wells Fargo & Company | 67,483 | $96.5K | 0.00% | +19,368+40.3% | Added |
| SEI Investments Co | 69,527 | $99.4K | 0.00% | +69,527 | New |
| MetLife Investment Management | 73,150 | $104.6K | 0.00% | +39,234+115.7% | Added |
| Exchange Traded Concepts, LLC | 85,006 | $121.6K | 0.00% | 00.0% | Unchanged |
| Susquehanna Fundamental Investments, LLC | 91,852 | $131.3K | 0.00% | +91,852 | New |
| Mackenzie Financial Corp | 91,956 | $131.5K | 0.00% | +91,956 | New |
| Citigroup Inc | 97,831 | $139.9K | 0.00% | +15,519+18.9% | Added |
| SG Americas Securities, LLC | 112,291 | $161.0K | 0.00% | +25,058+28.7% | Added |
| Macquarie Group Ltd | 150,000 | $215.0K | 0.00% | 00.0% | Unchanged |
| Jane Street Group, LLC | 151,526 | $216.7K | 0.00% | −265,925−63.7% | Reduced |
| Los Angeles Capital Management LLC | 159,760 | $228.5K | 0.00% | −29,900−15.8% | Reduced |
| UBS Group AG | 162,264 | $232.0K | 0.00% | −311,263−65.7% | Reduced |
| Rhumbline Advisers | 171,857 | $245.7K | 0.00% | +5,011+3.0% | Added |
| Exome Asset Management LLC | 172,924 | $249.7K | 0.19% | −1,005,646−85.3% | Reduced |
| Barclays PLC | 182,711 | $261.3K | 0.00% | −311,805−63.1% | Reduced |
| Federated Hermes, Inc. | 183,723 | $262.7K | 0.00% | −210.0% | Reduced |
| Alliancebernstein L.P. | 186,060 | $266.1K | 0.00% | 00.0% | Unchanged |
| ExodusPoint Capital Management, LP | 194,153 | $278.0K | 0.00% | +194,153 | New |
| Two Sigma Investments, LP | 210,876 | $301.6K | 0.00% | −89,346−29.8% | Reduced |
| Nuveen Asset Management, LLC | 232,223 | $332.1K | 0.00% | +81,022+53.6% | Added |
| Panagora Asset Management Inc | 239,685 | $342.8K | 0.00% | +6,476+2.8% | Added |
| FMR LLC | 299,324 | $428.0K | 0.00% | +21,584+7.8% | Added |
| Charles Schwab Investment Management Inc | 312,623 | $447.1K | 0.00% | 00.0% | Unchanged |
| Verition Fund Management LLC | 336,806 | $481.6K | 0.00% | −966,443−74.2% | Reduced |
| Bank of New York Mellon Corp | 346,189 | $495.1K | 0.00% | −25,984−7.0% | Reduced |
| Qube Research & Technologies Ltd | 347,415 | $496.8K | 0.00% | −529,628−60.4% | Reduced |
| BNP Paribas Arbitrage, SA | 361,147 | $516.4K | 0.00% | +123,949+52.3% | Added |
| UBS Oconnor LLC | 410,029 | $586.3K | 0.01% | −160,000−28.1% | Reduced |
| Citadel Advisors LLC | 421,360 | $602.5K | 0.00% | −3,990,195−90.4% | Reduced |
| Woodline Partners LP | 435,593 | $622.9K | 0.00% | +2,041+0.5% | Added |
| Two Sigma Advisers, LP | 448,000 | $640.6K | 0.00% | −38,800−8.0% | Reduced |