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 2022
Institutional positions in Mersana Therapeutics, Inc. as of Dec 31, 2022. 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
- 152
- 0 vs. Q3 2022
- Shares held
- 101.2M
- +8.95M (+9.7%) vs. Q3 2022
- Total value
- $592.8M
- −$30.6M (−4.9%) vs. Q3 2022
- New holders
- 20
- 68 more added
- Sold out
- 20
- 37 more reduced
Compare with Q3 2022: 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 2022
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q3 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Connor, Clark & Lunn Investment Management Ltd. | 208,433 | $1.22M | 0.01% | −50,254−19.4% | Reduced |
| Barclays PLC | 232,088 | $1.36M | 0.00% | +96,366+71.0% | Added |
| Hudson Bay Capital Management LP | 275,000 | $1.61M | 0.02% | +30,000+12.2% | Added |
| Voya Investment Management LLC | 286,894 | $1.68M | 0.00% | +47,610+19.9% | Added |
| UBS Group AG | 288,603 | $1.69M | 0.00% | +262,308+997.6% | Added |
| Platinum Investment Management Ltd | 290,298 | $1.70M | 0.06% | 00.0% | Unchanged |
| Bank of New York Mellon Corp | 368,029 | $2.16M | 0.00% | +7,433+2.1% | Added |
| Fred Alger Management, LLC | 378,450 | $2.22M | 0.01% | +4,555+1.2% | Added |
| JPMorgan Chase & Co | 386,823 | $2.27M | 0.00% | +326,697+543.4% | Added |
| Rhenman & Partners Asset Management AB | 400,000 | $2.34M | 0.24% | +400,000 | New |
| DAFNA Capital Management LLC | 413,463 | $2.42M | 0.68% | +35,700+9.5% | Added |
| Rafferty Asset Management, LLC | 416,864 | $2.44M | 0.02% | +203,101+95.0% | Added |
| Cubist Systematic Strategies, LLC | 427,152 | $2.50M | 0.02% | +34,624+8.8% | Added |
| Kennedy Capital Management, Inc. | 438,982 | $2.57M | 0.07% | +115,536+35.7% | Added |
| Opaleye Management Inc. | 460,000 | $2.70M | 0.94% | −440,300−48.9% | Reduced |
| Dimensional Fund Advisors LP | 489,783 | $2.87M | 0.00% | −2,705−0.5% | Reduced |
| LMR Partners LLP | 500,000 | $2.93M | 0.07% | +350,000+233.3% | Added |
| Jacobs Levy Equity Management, Inc | 503,145 | $2.95M | 0.02% | +99,458+24.6% | Added |
| Woodline Partners LP | 523,408 | $3.07M | 0.04% | +523,408 | New |
| CIBC Asset Management Inc | 566,785 | $3.32M | 0.01% | +566,785 | New |
| Renaissance Technologies LLC | 571,719 | $3.35M | 0.00% | −127,100−18.2% | Reduced |
| Two Sigma Investments, LP | 617,829 | $3.62M | 0.01% | −64,253−9.4% | Reduced |
| Citadel Advisors LLC | 625,576 | $3.67M | 0.00% | +448,673+253.6% | Added |
| Charles Schwab Investment Management Inc | 671,027 | $3.93M | 0.00% | +27,382+4.3% | Added |
| Hillsdale Investment Management Inc. | 693,200 | $4.06M | 0.34% | +2,700+0.4% | Added |
| Bank of America Corp | 760,723 | $4.46M | 0.00% | +363,077+91.3% | Added |
| Decheng Capital Management III (Cayman), LLC | 904,268 | $5.30M | 1.98% | 00.0% | Unchanged |
| Northern Trust Corp | 904,376 | $5.30M | 0.00% | +32,156+3.7% | Added |
| Acuta Capital Partners, LLC | 950,000 | $5.57M | 3.43% | +950,000 | New |
| Two Sigma Advisers, LP | 1,053,300 | $6.17M | 0.02% | −64,400−5.8% | Reduced |
| Deutsche Bank AG | 1,130,704 | $6.63M | 0.00% | +11,842+1.1% | Added |
| Silverarc Capital Management, LLC | 1,140,182 | $6.68M | 2.30% | +146,109+14.7% | Added |
| Ally Bridge Group (NY) LLC | 1,191,271 | $6.98M | 6.79% | +259,732+27.9% | Added |
| Nuveen Asset Management, LLC | 1,229,407 | $7.20M | 0.00% | −39,714−3.1% | Reduced |
| Geode Capital Management, LLC | 1,707,470 | $10.0M | 0.00% | +57,451+3.5% | Added |
| Morgan Stanley | 1,757,986 | $10.3M | 0.00% | +163,412+10.2% | Added |
| Braidwell LP | 1,862,700 | $10.9M | 0.37% | +1,862,700 | New |
| Goldman Sachs Group Inc | 2,014,496 | $11.8M | 0.00% | −389,473−16.2% | Reduced |
| Artal Group S.A. | 2,200,000 | $12.9M | 0.74% | 00.0% | Unchanged |
| D. E. Shaw & Co., Inc. | 2,335,939 | $13.7M | 0.02% | −288,284−11.0% | Reduced |
| Marshall Wace, LLP | 2,523,984 | $14.8M | 0.04% | +1,995,516+377.6% | Added |
| Candriam Luxembourg S.C.A. | 2,692,848 | $15.8M | 0.11% | +195,000+7.8% | Added |
| Millennium Management LLC | 3,663,527 | $21.5M | 0.02% | −120,648−3.2% | Reduced |
| Sarissa Capital Management LP | 3,997,010 | $23.4M | 2.79% | 00.0% | Unchanged |
| Rock Springs Capital Management LP | 4,103,803 | $24.0M | 0.58% | +27,845+0.7% | Added |
| Bellevue Group AG | 4,282,600 | $25.1M | 0.33% | +200,000+4.9% | Added |
| Vanguard Group Inc | 4,449,040 | $26.1M | 0.00% | +71,041+1.6% | Added |
| State Street Corp | 5,856,061 | $34.3M | 0.00% | +1,797,041+44.3% | Added |
| BlackRock Inc. | 7,491,929 | $43.9M | 0.00% | +403,842+5.7% | Added |
| Avoro Capital Advisors LLC | 7,550,000 | $44.2M | 0.66% | 00.0% | Unchanged |
| Bain Capital Life Sciences Investors, LLC | 8,663,673 | $50.8M | 5.67% | 00.0% | Unchanged |
| OrbiMed Advisors LLC | 9,011,437 | $52.8M | 1.01% | 00.0% | Unchanged |
| UBS Oconnor LLC | 0 | $0 | 0.00% | −376,496−100.0% | Sold out |
| Resolute Capital Asset Partners LLC | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −86,151−100.0% | Sold out |
| Arrowstreet Capital, Limited Partnership | 0 | $0 | 0.00% | −34,771−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −33,416−100.0% | Sold out |
| Ergoteles LLC | 0 | $0 | 0.00% | −32,161−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −25,521−100.0% | Sold out |
| Atom Investors LP | 0 | $0 | 0.00% | −25,104−100.0% | Sold out |
| PDT Partners, LLC | 0 | $0 | 0.00% | −24,975−100.0% | Sold out |
| Ensign Peak Advisors, Inc | 0 | $0 | 0.00% | −22,330−100.0% | Sold out |
| SEI Investments Co | 0 | $0 | 0.00% | −20,303−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −16,312−100.0% | Sold out |
| Point72 Hong Kong Ltd | 0 | $0 | 0.00% | −15,156−100.0% | Sold out |
| Cipher Capital LP | 0 | $0 | 0.00% | −12,058−100.0% | Sold out |
| Campbell & CO Investment Adviser LLC | 0 | $0 | 0.00% | −11,959−100.0% | Sold out |
| IFP Advisors, Inc | 0 | $0 | 0.00% | −1,800−100.0% | Sold out |
| Wells Fargo & Company | 0 | $0 | 0.00% | −1,561−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −742−100.0% | Sold out |
| Signaturefd, LLC | 0 | $0 | 0.00% | −165−100.0% | Sold out |
| US Bancorp | 0 | $0 | 0.00% | −52−100.0% | Sold out |