Mersana Therapeutics Inc.
13F holders, Q4 2024 (December 31)132holders +16
22new positions
11sold out
4famous investors
$1.43avg. 13F price*
At the end of Q4 2024, 132 institutions reported holding Mersana Therapeutics Inc. in their 13F filings, up 16 from Q3 2024. 22 opened new positions and 11 sold out. The largest holders were Nextech Invest Ltd. ($17.3M), EcoR1 Capital, LLC ($16.2M) and Venrock Adviser, LLC ($14.7M). 4 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- Mersana Therapeutics Inc.
- CUSIP
- 59045L106
- Latest filing quarter
- Q4 2025
History
Number of 13F holders
Total Exit/New Position Q3 2024 → Q4 2024
| Institutions | Total Value | |
|---|---|---|
| New Positions | 22 | $7.9M |
| Exits | 11 | $4.4M |
All 13F filers, Q3 2024 → Q4 2024: 8,905,283 shares bought and 22,853,015 shares sold, net −13,947,732 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 132 holders
| Nextech Invest Ltd. | 2.80% | No change | 12,067,246 | $17.3M |
| EcoR1 Capital, LLC | 0.65% | Reduce -41.5% | 11,328,000 | $16.2M |
| Venrock Adviser, LLC | 1.01% | Reduce -9.4% | 10,257,790 | $14.7M |
| BlackRock, Inc. | 0.00% | Add +6.8% | 9,205,182 | $13.2M |
| Bain Capital Life Sciences Investors, LLC | 1.46% | No change | 8,663,673 | $12.4M |
| Vanguard Group Inc. | 0.00% | Reduce -1.7% | 7,057,516 | $10.1M |
| Novo Holdings A/S | 0.37% | New | 4,250,000 | $6.1M |
| Rock Springs Capital Management LP | 0.19% | Add +12.6% | 3,431,684 | $4.9M |
| State Street Corp. | 0.00% | Add +1.4% | 2,764,895 | $4.0M |
| Boxer Capital Management, LLC | 0.32% | — | 2,635,000 | $3.8M |
| JPMorgan Chase & Co. | 0.00% | Add +7.8% | 2,534,447 | $3.6M |
| Geode Capital Management, LLC | 0.00% | Add +1.2% | 2,442,250 | $3.5M |
| Schonfeld Strategic Advisors LLC | 0.02% | Reduce -4.7% | 2,119,586 | $3.0M |
| Catalio Capital Management, LP | 0.53% | — | 1,705,036 | $2.4M |
| 5AM Venture Management, LLC | 0.45% | No change | 1,305,000 | $1.9M |
| Morgan Stanley | 0.00% | Reduce -11.8% | 1,203,356 | $1.7M |
| Acuta Capital Partners, LLC | 1.61% | Reduce -6.6% | 1,120,500 | $1.6M |
| Jacobs Levy Equity Management, Inc. | 0.01% | Add +12.0% | 1,111,998 | $1.6M |
| Baker Bros. Advisors LP | 0.02% | No change | 1,086,115 | $1.6M |
| Octagon Capital Advisors LP | 0.24% | No change | 992,000 | $1.4M |
| Bank of America Corp. | 0.00% | Reduce -3.6% | 953,952 | $1.4M |
| Northern Trust Corp. | 0.00% | Reduce -0.4% | 929,708 | $1.3M |
| 683 Capital Management, LLC | 0.14% | Add +392.4% | 900,000 | $1.3M |
| Deutsche Bank AG | 0.00% | Reduce -47.4% | 839,724 | $1.2M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -59.0% | 802,366 | $1.1M |
| Millennium Management | 0.00% | Add +206.4% | 795,973 | $1.1M |
| Sphera Funds Management LTD. | 0.18% | New | 690,272 | $987K |
| Renaissance Technologies | 0.00% | Add +23.1% | 606,285 | $867K |
| Wellington Management Group LLP | 0.00% | Reduce -6.8% | 576,148 | $824K |
| D. E. Shaw & Co. | 0.00% | Reduce -46.8% | 544,463 | $779K |
| Atle Fund Management AB | 0.36% | No change | 538,621 | $765K |
| Gsa Capital Partners LLP | 0.05% | Add +87.0% | 508,296 | $727K |
| Two Sigma Advisers, LP | 0.00% | Reduce -8.0% | 448,000 | $641K |
| Woodline Partners LP | 0.00% | Add +0.5% | 435,593 | $623K |
| Citadel Advisors | 0.00% | Reduce -90.5% | 421,360 | $603K |
| OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) | 0.02% | Reduce -28.1% | 410,029 | $586K |
| BNP Paribas Financial Markets | 0.00% | Add +52.3% | 361,147 | $516K |
| Qube Research & Technologies Ltd | 0.00% | Reduce -60.4% | 347,415 | $497K |
| Bank of New York Mellon Corp | 0.00% | Reduce -7.0% | 346,189 | $495K |
| Verition Fund Management LLC | 0.00% | Reduce -74.2% | 336,806 | $482K |
| Charles Schwab Investment Management Inc. | 0.00% | No change | 312,623 | $447K |
| FMR LLC | 0.00% | Add +7.8% | 299,324 | $428K |
| Panagora Asset Management Inc. | 0.00% | Add +2.8% | 239,685 | $343K |
| Nuveen Asset Management, LLC | 0.00% | Add +53.6% | 232,223 | $332K |
| Two Sigma Investments, LP | 0.00% | Reduce -29.8% | 210,876 | $302K |
| ExodusPoint Capital Management, LP | 0.00% | New | 194,153 | $278K |
| Alliancebernstein L.P. | 0.00% | No change | 186,060 | $266K |
| Federated Hermes, Inc. | 0.00% | Reduce -0.0% | 183,723 | $263K |
| Barclays PLC | 0.00% | Reduce -63.0% | 182,711 | $261K |
| Exome Asset Management LLC | 0.19% | Reduce -85.3% | 172,924 | $250K |
| Rhumbline Advisers | 0.00% | Add +3.0% | 171,857 | $246K |
| UBS Group AG | 0.00% | Reduce -65.7% | 162,264 | $232K |
| Los Angeles Capital Management LLC | 0.00% | Reduce -15.8% | 159,760 | $228K |
| Jane Street Group, LLC | 0.00% | Reduce -63.7% | 151,526 | $217K |
| Macquarie Group Ltd. | 0.00% | No change | 150,000 | $215K |
| SG Americas Securities, LLC | 0.00% | Add +28.7% | 112,291 | $161K |
| Citigroup Inc. | 0.00% | Add +18.9% | 97,831 | $140K |
| Mackenzie Financial Corp. | 0.00% | New | 91,956 | $131K |
| Susquehanna Fundamental Investments, LLC | 0.00% | — | 91,852 | $131K |
| Exchange Traded Concepts, LLC | 0.00% | No change | 85,006 | $122K |
| MetLife Investment Management, LLC | 0.00% | Add +115.7% | 73,150 | $105K |
| Sei Investments Co. | 0.00% | New | 69,527 | $99K |
| Wells Fargo & Company | 0.00% | Add +40.3% | 67,483 | $97K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +4.5% | 65,936 | $94K |
| Oxford Asset Management LLP | 0.04% | New | 65,386 | $94K |
| XTX Topco Ltd | 0.01% | Reduce -81.7% | 63,530 | $91K |
| QVT Financial LP | 0.01% | No change | 62,657 | $90K |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -37.3% | 62,093 | $89K |
| Algert Global LLC | 0.00% | Reduce -5.4% | 60,083 | $86K |
| Corebridge Financial, Inc. | 0.00% | Reduce -7.0% | 56,398 | $81K |
| Avanza Fonder AB | 0.00% | — | 56,298 | $81K |
| Invesco Ltd. | 0.00% | Reduce -1.1% | 54,872 | $78K |
| Ameriprise Financial Inc. | 0.00% | Add +16.8% | 53,329 | $76K |
| Group One Trading LLC | 0.00% | Add +60.5% | 52,283 | $75K |
| Prelude Capital Management, LLC | 0.01% | Reduce -85.9% | 51,357 | $73K |
| Intech Investment Management LLC | 0.00% | Add +86.6% | 51,028 | $73K |
| Susquehanna International Group, LLP | 0.00% | Reduce -33.4% | 49,853 | $71K |
| Graham Capital Management, L.P. | 0.00% | Add +17.2% | 49,724 | $71K |
| Cubist Systematic Strategies, LLC | 0.00% | New | 45,296 | $65K |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -1.1% | 43,990 | $63K |
| ProShare Advisors LLC | 0.00% | Add +76.3% | 37,799 | $54K |
| New York State Common Retirement Fund | 0.00% | No change | 37,235 | $53K |
| Voya Investment Management LLC | 0.00% | Reduce -5.5% | 36,190 | $52K |
| Walleye Trading LLC | 0.00% | No change | 31,526 | $45K |
| State Board of Administration of Florida Retirement System | 0.00% | No change | 28,800 | $41K |
| Atom Investors LP | 0.00% | Add +7.7% | 26,563 | $38K |
| China Universal Asset Management Co., Ltd. | 0.00% | New | 26,194 | $37K |
| Quarry LP | 0.01% | Reduce -20.0% | 24,000 | $34K |
| Jasper Ridge Partners, L.P. | 0.00% | No change | 23,100 | $33K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | — | 22,593 | $32K |
| Public Employees Retirement System of Ohio | 0.00% | No change | 20,587 | $29K |
| Engineers Gate Manager LP | 0.00% | New | 17,084 | $24K |
| US Bancorp \de | 0.00% | No change | 16,178 | $23K |
| Marshall Wace, LLP | 0.00% | New | 15,600 | $22K |
| GRIMES & Co WEALTH MANAGEMENT, LLC | 0.00% | No change | 14,998 | $21K |
| Aquatic Capital Management LLC | 0.00% | New | 14,551 | $21K |
| HSBC Holdings PLC | 0.00% | Reduce -4.8% | 13,301 | $18K |
| Bayesian Capital Management, LP | 0.00% | New | 12,600 | $18K |
| Squarepoint Ops LLC | 0.00% | Reduce -85.2% | 12,104 | $17K |
| Lazard Asset Management LLC | 0.00% | New | 12,104 | $17K |
| Russell Investments Group, Ltd. | 0.00% | Add +9.7% | 11,812 | $17K |
| Legal & General Group Plc | 0.00% | No change | 11,097 | $16K |
| Wolverine Trading, LLC | 0.00% | New | 10,869 | $15K |
| Victory Capital Management Inc. | 0.00% | Reduce -6.5% | 10,707 | $15K |
| Cibc World Markets Corp. | 0.00% | New | 10,616 | $15K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 9,896 | $14K |
| Hunter Perkins Capital Management, LLC | 0.00% | No change | 10,000 | $14K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +105.3% | 8,959 | $13K |
| STRS Ohio | 0.00% | No change | 8,700 | $12K |
| Royal Bank of Canada | 0.00% | Reduce -21.5% | 8,992 | $12K |
| California State Teachers Retirement System | 0.00% | No change | 8,220 | $12K |
| Mirae Asset Global Investments Co., Ltd. | 0.00% | New | 4,117 | $6K |
| Smartleaf Asset Management LLC | 0.00% | Reduce -23.6% | 4,013 | $6K |
| Nisa Investment Advisors, LLC | 0.00% | Add +15.7% | 3,622 | $5K |
| Amalgamated Bank | 0.00% | No change | 3,769 | $5K |
| Osaic Holdings, Inc. | 0.00% | No change | 3,432 | $5K |
| Picton Mahoney Asset Management | 0.00% | Add +15.1% | 2,871 | $4K |
| GF Fund Management Co. LTD. | 0.00% | — | 2,594 | $4K |
| Brooklyn Investment Group | 0.00% | New | 2,517 | $4K |
| Point72 (DIFC) Ltd | 0.00% | New | 2,203 | $3K |
| Sterling Capital Management LLC | 0.00% | Add +712.0% | 1,900 | $3K |
| R Squared Ltd | 0.00% | — | 1,060 | $2K |
| Optiver Holding B.V. | 0.00% | New | 705 | $1K |
| Signaturefd, LLC | 0.00% | New | 286 | $409 |
| SBI Securities Co., Ltd. | 0.00% | — | 218 | $312 |
| PNC Financial Services Group, Inc. | 0.00% | No change | 200 | $286 |
| North Star Investment Management Corp. | 0.00% | No change | 150 | $214 |
| Frazier Financial Advisors, LLC | 0.00% | No change | 5 | $8 |
| IFP Advisors, Inc | 0.00% | New | 2 | $3 |
| Point72 Asia (Singapore) Pte. Ltd. | 0.00% | New | 1 | $1 |
| Farther Finance Advisors, LLC | 0.00% | No change | 1 | $1 |
| Cwm, LLC | 0.00% | Add +44.0% | 180 | $0 |
"% of holder's portfolio" is MERSANA THERAPEUTICS INC's weight in each manager's 13F, not the share of Mersana Therapeutics Inc. the manager owns.