Mersana Therapeutics Inc.
13F holders, Q2 2024 (June 30)122holders −3
17new positions
22sold out
4famous investors
$2.01avg. 13F price*
At the end of Q2 2024, 122 institutions reported holding Mersana Therapeutics Inc. in their 13F filings, down 3 from Q1 2024. 17 opened new positions and 22 sold out. The largest holders were EcoR1 Capital, LLC ($38.9M), Venrock Adviser, LLC ($22.8M) and Nextech Invest Ltd. ($19.1M). 4 famous investors held it, including Ken Griffin (0.0% of Citadel Advisors's portfolio), Jim Simons / Peter Brown (0.0% of Renaissance Technologies'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 Q1 2024 → Q2 2024
| Institutions | Total Value | |
|---|---|---|
| New Positions | 17 | $1.9M |
| Exits | 22 | $30.1M |
All 13F filers, Q1 2024 → Q2 2024: 13,677,461 shares bought and 17,081,130 shares sold, net −3,403,669 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 122 holders
| EcoR1 Capital, LLC | 1.19% | No change | 19,364,688 | $38.9M |
| Venrock Adviser, LLC | 1.45% | No change | 11,328,000 | $22.8M |
| Nextech Invest Ltd. | 3.22% | Add +147.0% | 9,526,146 | $19.1M |
| Bain Capital Life Sciences Investors, LLC | 1.91% | No change | 8,663,673 | $17.4M |
| BlackRock Inc. | 0.00% | Add +3.6% | 8,383,910 | $16.9M |
| Vanguard Group Inc. | 0.00% | Add +6.8% | 6,702,521 | $13.5M |
| Rock Springs Capital Management LP | 0.19% | No change | 3,046,782 | $6.1M |
| Schonfeld Strategic Advisors LLC | 0.05% | Add +195.1% | 2,976,918 | $6.0M |
| Citadel Advisors | 0.01% | Reduce -20.7% | 2,743,599 | $5.5M |
| State Street Corp. | 0.00% | Reduce -51.2% | 2,682,055 | $5.4M |
| Cormorant Asset Management, LP | 0.30% | No change | 2,600,000 | $5.2M |
| Silverarc Capital Management, LLC | 1.24% | Reduce -15.8% | 2,500,585 | $5.0M |
| Geode Capital Management, LLC | 0.00% | Add +5.7% | 2,493,423 | $5.0M |
| Morgan Stanley | 0.00% | Reduce -22.8% | 2,272,594 | $4.6M |
| JPMorgan Chase & Co. | 0.00% | Add +38.5% | 1,976,899 | $4.0M |
| Acuta Capital Partners, LLC | 2.82% | Reduce -23.2% | 1,663,000 | $3.3M |
| Deutsche Bank AG | 0.00% | Reduce -0.6% | 1,576,000 | $3.2M |
| Woodline Partners LP | 0.03% | Reduce -50.0% | 1,467,311 | $2.9M |
| D. E. Shaw & Co. | 0.00% | Add +19.9% | 1,465,580 | $2.9M |
| Renaissance Technologies | 0.00% | Add +1.4% | 1,448,219 | $2.9M |
| 5AM Venture Management, LLC | 0.59% | No change | 1,305,000 | $2.6M |
| Goldman Sachs Group Inc. | 0.00% | Add +85.1% | 1,244,937 | $2.5M |
| Baker Bros. Advisors LP | 0.03% | No change | 1,086,115 | $2.2M |
| Qube Research & Technologies Ltd | 0.00% | Add +3.4% | 992,565 | $2.0M |
| Octagon Capital Advisors LP | 0.33% | Reduce -0.8% | 992,000 | $2.0M |
| Northern Trust Corp. | 0.00% | Reduce -4.7% | 900,621 | $1.8M |
| Affinity Asset Advisors, LLC | 0.27% | Reduce -23.3% | 767,000 | $1.5M |
| Two Sigma Investments, LP | 0.00% | Add +243.5% | 748,690 | $1.5M |
| Two Sigma Advisers, LP | 0.00% | Add +361.7% | 719,300 | $1.4M |
| Millennium Management | 0.00% | Reduce -54.1% | 691,785 | $1.4M |
| OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) | 0.03% | Add +25.3% | 544,293 | $1.1M |
| Wellington Management Group LLP | 0.00% | Reduce -0.3% | 532,866 | $1.1M |
| ClariVest Asset Management LLC | 0.10% | Add +6.1% | 500,498 | $1.0M |
| Jacobs Levy Equity Management, Inc. | 0.00% | Reduce -40.0% | 485,593 | $976K |
| Bridgeway Capital Management, LLC | 0.02% | Add +104.7% | 475,500 | $956K |
| Bank of New York Mellon Corp | 0.00% | Add +19.6% | 452,829 | $910K |
| Barclays PLC | 0.00% | Reduce -8.9% | 372,717 | $749K |
| Atom Investors LP | 0.07% | Reduce -16.8% | 365,435 | $735K |
| BNP Paribas Financial Markets | 0.00% | Add +316.3% | 336,079 | $676K |
| Jane Street Group, LLC | 0.00% | Reduce -14.4% | 317,332 | $638K |
| Charles Schwab Investment Management Inc. | 0.00% | Add +5.7% | 312,630 | $628K |
| Susquehanna Fundamental Investments, LLC | 0.01% | Add +31.9% | 308,691 | $620K |
| HRT Financial LP | 0.00% | New | 259,689 | $521K |
| Squarepoint Ops LLC | 0.00% | New | 252,804 | $508K |
| FMR LLC | 0.00% | Reduce -24.6% | 245,408 | $493K |
| Panagora Asset Management Inc. | 0.00% | Add +0.1% | 236,225 | $475K |
| Alliancebernstein L.P. | 0.00% | Add +10.2% | 186,060 | $374K |
| Federated Hermes, Inc. | 0.00% | Add +105301.7% | 185,507 | $373K |
| Atle Fund Management AB | 0.23% | Add +84.9% | 184,900 | $372K |
| Rhumbline Advisers | 0.00% | Reduce -1.6% | 176,063 | $354K |
| Marshall Wace, LLP | 0.00% | Add +358.0% | 176,029 | $354K |
| Los Angeles Capital Management LLC | 0.00% | Reduce -11.0% | 175,420 | $353K |
| Bank of America Corp. | 0.00% | Reduce -23.8% | 159,773 | $321K |
| Macquarie Group Ltd. | 0.00% | No change | 150,000 | $302K |
| SG Americas Securities, LLC | 0.00% | Add +313.9% | 138,722 | $279K |
| Nuveen Asset Management, LLC | 0.00% | No change | 123,339 | $248K |
| XTX Topco Ltd | 0.02% | Add +262.1% | 121,432 | $244K |
| Superstring Capital Management LP | 0.28% | New | 110,073 | $221K |
| Susquehanna International Group, LLP | 0.00% | Add +14.0% | 108,859 | $219K |
| ExodusPoint Capital Management, LP | 0.00% | New | 107,174 | $215K |
| T. Rowe Price Associates Inc. | 0.00% | Add +23.9% | 99,078 | $200K |
| Susquehanna Portfolio Strategies, LLC | 0.01% | No change | 93,878 | $189K |
| State of Wisconsin Investment Board | 0.00% | Reduce -21.5% | 83,600 | $168K |
| Jump Financial, LLC | 0.00% | Add +395.4% | 80,562 | $162K |
| Acadian Asset Management LLC | 0.00% | Reduce -84.8% | 71,506 | $143K |
| MetLife Investment Management, LLC | 0.00% | Add +31.4% | 65,583 | $132K |
| QVT Financial LP | 0.01% | No change | 62,657 | $126K |
| Corebridge Financial, Inc. | 0.00% | — | 61,030 | $123K |
| Gsa Capital Partners LLP | 0.01% | Add +64.4% | 57,960 | $116K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | — | 56,945 | $114K |
| Graham Capital Management, L.P. | 0.01% | New | 50,970 | $102K |
| Aigen Investment Management, LP | 0.02% | Add +104.2% | 50,083 | $101K |
| Wells Fargo & Company | 0.00% | Add +25.6% | 47,270 | $95K |
| Y-Intercept (Hong Kong) Ltd | 0.01% | New | 46,779 | $94K |
| Manufacturers Life Insurance Company, The | 0.00% | Add +10.4% | 46,487 | $93K |
| Ameriprise Financial Inc. | 0.00% | Add +154.3% | 45,547 | $92K |
| Invesco Ltd. | 0.00% | Reduce -86.1% | 45,056 | $91K |
| Algert Global LLC | 0.00% | New | 44,655 | $90K |
| Exchange Traded Concepts, LLC | 0.00% | Reduce -23.7% | 43,420 | $87K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +4870.7% | 40,760 | $82K |
| Voya Investment Management LLC | 0.00% | Add +5.6% | 38,588 | $78K |
| Simplex Trading, LLC | 0.00% | Add +380.9% | 38,661 | $77K |
| New York State Common Retirement Fund | 0.00% | Add +0.2% | 37,235 | $75K |
| UBS Group AG | 0.00% | Reduce -87.9% | 34,983 | $70K |
| Walleye Trading LLC | 0.00% | No change | 31,526 | $63K |
| State Board of Administration of Florida Retirement System | 0.00% | Add +5.1% | 28,800 | $58K |
| Citigroup Inc. | 0.00% | Reduce -93.8% | 25,566 | $51K |
| Prio Wealth Limited Partnership | 0.00% | No change | 23,529 | $47K |
| Group One Trading LLC | 0.00% | New | 23,470 | $47K |
| Jasper Ridge Partners, L.P. | 0.00% | No change | 23,100 | $46K |
| Public Employees Retirement System of Ohio | 0.00% | New | 20,587 | $41K |
| AJOVista, LLC | 0.12% | New | 20,463 | $41K |
| Principal Financial Group Inc. | 0.00% | Reduce -42.5% | 18,278 | $37K |
| Nisa Investment Advisors, LLC | 0.00% | Add +0.4% | 17,800 | $36K |
| Prudential Financial Inc. | 0.00% | No change | 17,335 | $35K |
| GRIMES & Co WEALTH MANAGEMENT, LLC | 0.00% | Reduce -2.3% | 14,998 | $30K |
| ProShare Advisors LLC | 0.00% | Reduce -25.4% | 14,850 | $30K |
| Dimensional Fund Advisors LP | 0.00% | Reduce -56.1% | 13,703 | $28K |
| HSBC Holdings PLC | 0.00% | Reduce -0.7% | 12,526 | $25K |
| Victory Capital Management Inc. | 0.00% | Reduce -1.8% | 11,873 | $24K |
"% 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.