Mersana Therapeutics Inc.
13F holders, Q1 2024 (March 31)125holders
4famous investors
$4.48avg. 13F price*
At the end of Q1 2024, 125 institutions reported holding Mersana Therapeutics Inc. in their 13F filings. The largest holders were EcoR1 Capital, LLC ($86.8M), Venrock Adviser, LLC ($50.7M) and Bain Capital Life Sciences Investors, LLC ($38.8M). 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
| Institutions | Total Value | |
|---|---|---|
| New Positions | 38 | $55.8M |
| Exits | 18 | $5.4M |
Ownership 125 holders
| EcoR1 Capital, LLC | 2.21% | No change | 19,364,688 | $86.8M |
| Venrock Adviser, LLC | 2.41% | No change | 11,328,000 | $50.7M |
| Bain Capital Life Sciences Investors, LLC | 3.12% | No change | 8,663,673 | $38.8M |
| BlackRock Inc. | 0.00% | Add +3.2% | 8,095,729 | $36.3M |
| Vanguard Group Inc. | 0.00% | Add +0.6% | 6,274,370 | $28.1M |
| State Street Corp. | 0.00% | Add +136.0% | 5,497,443 | $24.6M |
| Nextech Invest Ltd. | 2.74% | Reduce -35.5% | 3,856,321 | $17.3M |
| Balyasny Asset Management L.P. | 0.04% | Reduce -62.3% | 3,655,998 | $16.4M |
| Citadel Advisors | 0.02% | Add +79.5% | 3,458,985 | $15.5M |
| Rock Springs Capital Management LP | 0.35% | No change | 3,046,782 | $13.6M |
| Silverarc Capital Management, LLC | 3.73% | Reduce -53.8% | 2,968,798 | $13.3M |
| Morgan Stanley | 0.00% | Reduce -28.8% | 2,942,677 | $13.2M |
| Woodline Partners LP | 0.12% | New | 2,934,622 | $13.1M |
| Cormorant Asset Management, LP | 0.51% | New | 2,600,000 | $11.6M |
| Geode Capital Management, LLC | 0.00% | Add +2.7% | 2,358,221 | $10.6M |
| Acuta Capital Partners, LLC | 6.30% | Reduce -8.6% | 2,164,628 | $9.7M |
| Deutsche Bank AG | 0.00% | Add +39.1% | 1,585,263 | $7.1M |
| Millennium Management | 0.01% | Reduce -55.6% | 1,507,580 | $6.8M |
| Renaissance Technologies | 0.01% | Add +64.9% | 1,427,819 | $6.4M |
| JPMorgan Chase & Co. | 0.00% | Add +1710.8% | 1,427,340 | $6.4M |
| 5AM Venture Management, LLC | 1.31% | No change | 1,305,000 | $5.8M |
| D. E. Shaw & Co. | 0.01% | Add +83.2% | 1,222,623 | $5.5M |
| Baker Bros. Advisors LP | 0.06% | No change | 1,086,115 | $4.9M |
| Schonfeld Strategic Advisors LLC | 0.04% | Reduce -11.5% | 1,008,658 | $4.5M |
| Affinity Asset Advisors, LLC | 0.78% | No change | 1,000,000 | $4.5M |
| Octagon Capital Advisors LP | 0.54% | New | 1,000,000 | $4.5M |
| Qube Research & Technologies Ltd | 0.01% | New | 959,695 | $4.3M |
| Northern Trust Corp. | 0.00% | Add +1.5% | 945,171 | $4.2M |
| Jacobs Levy Equity Management, Inc. | 0.02% | Reduce -13.0% | 809,879 | $3.6M |
| Ally Bridge Group (NY) LLC | 2.00% | New | 801,437 | $3.6M |
| Goldman Sachs Group Inc. | 0.00% | Add +362.1% | 672,607 | $3.0M |
| Deep Track Capital, LP | 0.07% | New | 579,674 | $2.6M |
| Verition Fund Management LLC | 0.03% | New | 564,163 | $2.5M |
| Wellington Management Group LLP | 0.00% | New | 534,618 | $2.4M |
| ClariVest Asset Management LLC | 0.22% | New | 471,848 | $2.1M |
| Acadian Asset Management LLC | 0.01% | Add +166.7% | 468,923 | $2.1M |
| Atom Investors LP | 0.25% | Reduce -43.3% | 439,232 | $2.0M |
| OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) | 0.06% | Reduce -21.8% | 434,293 | $1.9M |
| Citigroup Inc. | 0.00% | Add +2497.0% | 414,848 | $1.9M |
| Barclays PLC | 0.00% | Add +169.1% | 409,218 | $1.8M |
| Bank of New York Mellon Corp | 0.00% | Reduce -2.0% | 378,737 | $1.7M |
| Jane Street Group, LLC | 0.00% | Reduce -0.1% | 370,633 | $1.7M |
| Rafferty Asset Management, LLC | 0.01% | New | 368,434 | $1.7M |
| FMR LLC | 0.00% | Reduce -39.2% | 325,597 | $1.5M |
| Invesco Ltd. | 0.00% | Add +565.7% | 324,410 | $1.5M |
| Monashee Investment Management LLC | 0.17% | New | 310,000 | $1.4M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -4.0% | 295,872 | $1.3M |
| UBS Group AG | 0.00% | Add +89.0% | 289,667 | $1.3M |
| Cubist Systematic Strategies, LLC | 0.01% | Add +106.8% | 239,143 | $1.1M |
| Panagora Asset Management Inc. | 0.01% | Reduce -6.1% | 236,042 | $1.1M |
| Susquehanna Fundamental Investments, LLC | 0.05% | New | 234,116 | $1.0M |
| Bridgeway Capital Management, LLC | 0.02% | No change | 232,300 | $1.0M |
| Two Sigma Investments, LP | 0.00% | Add +27.2% | 217,945 | $976K |
| Bank of America Corp. | 0.00% | Add +29.3% | 209,563 | $939K |
| Canada Pension Plan Investment Board | 0.00% | New | 204,900 | $918K |
| Los Angeles Capital Management LLC | 0.00% | Reduce -0.2% | 197,163 | $883K |
| Rhumbline Advisers | 0.00% | Add +11.8% | 178,953 | $802K |
| Alliancebernstein L.P. | 0.00% | Add +42.8% | 168,810 | $756K |
| Two Sigma Advisers, LP | 0.00% | Add +2.9% | 155,800 | $698K |
| Macquarie Group Ltd. | 0.00% | No change | 150,000 | $672K |
| Lighthouse Investment Partners, LLC | 0.03% | New | 129,515 | $580K |
| Nuveen Asset Management, LLC | 0.00% | Add +87.2% | 123,339 | $553K |
| HighVista Strategies LLC | 0.20% | New | 122,315 | $548K |
| State of Wisconsin Investment Board | 0.00% | New | 106,500 | $477K |
| Atle Fund Management AB | 0.27% | New | 100,000 | $448K |
| Susquehanna International Group, LLP | 0.00% | Reduce -37.5% | 95,482 | $428K |
| Susquehanna Portfolio Strategies, LLC | 0.01% | No change | 93,878 | $421K |
| BNP Paribas Financial Markets | 0.00% | Add +90.0% | 80,735 | $362K |
| T. Rowe Price Associates Inc. | 0.00% | Add +6.6% | 79,932 | $359K |
| QVT Financial LP | 0.03% | No change | 62,657 | $283K |
| Profund Advisors LLC | 0.01% | New | 58,220 | $261K |
| Deerfield Management Company, L.P. | 0.00% | New | 57,478 | $258K |
| Exchange Traded Concepts, LLC | 0.01% | Reduce -42.3% | 56,930 | $255K |
| American International Group, Inc. | 0.00% | Reduce -0.8% | 54,639 | $245K |
| Mirae Asset Global Investments Co., Ltd. | 0.00% | New | 54,127 | $226K |
| MetLife Investment Management, LLC | 0.00% | Add +7.0% | 49,899 | $224K |
| Manufacturers Life Insurance Company, The | 0.00% | Add +1.1% | 42,117 | $189K |
| Marshall Wace, LLP | 0.00% | Reduce -75.6% | 38,433 | $172K |
| Wells Fargo & Company | 0.00% | Add +22.0% | 37,625 | $169K |
| New York State Common Retirement Fund | 0.00% | Reduce -0.3% | 37,155 | $166K |
| Voya Investment Management LLC | 0.00% | Reduce -20.6% | 36,527 | $164K |
| Gsa Capital Partners LLP | 0.01% | New | 35,255 | $158K |
| XTX Topco Ltd | 0.02% | New | 33,539 | $150K |
| SG Americas Securities, LLC | 0.00% | Reduce -14.6% | 33,513 | $150K |
| Principal Financial Group Inc. | 0.00% | Reduce -5.1% | 31,775 | $142K |
| Walleye Trading LLC | 0.00% | New | 31,526 | $141K |
| Dimensional Fund Advisors LP | 0.00% | Reduce -69.3% | 31,243 | $140K |
| State Board of Administration of Florida Retirement System | 0.00% | Reduce -4.8% | 27,402 | $113K |
| Aigen Investment Management, LP | 0.02% | New | 24,530 | $110K |
| Prio Wealth Limited Partnership | 0.00% | No change | 23,529 | $105K |
| Jasper Ridge Partners, L.P. | 0.00% | No change | 23,100 | $103K |
| ProShare Advisors LLC | 0.00% | Add +8.6% | 19,919 | $89K |
| NEOS Investment Management LLC | 0.01% | New | 19,465 | $87K |
| Ameriprise Financial Inc. | 0.00% | Reduce -56.3% | 17,910 | $80K |
| Nisa Investment Advisors, LLC | 0.00% | Add +0.5% | 17,736 | $79K |
| E Fund Management Co., Ltd. | 0.00% | New | 17,411 | $78K |
| Prudential Financial Inc. | 0.00% | New | 17,335 | $78K |
| Oxford Asset Management LLP | 0.08% | New | 16,586 | $74K |
| Jump Financial, LLC | 0.00% | New | 16,261 | $73K |
| GRIMES & Co WEALTH MANAGEMENT, LLC | 0.00% | Reduce -2.0% | 15,347 | $69K |
| Hunter Perkins Capital Management, LLC | 0.01% | Reduce -41.6% | 15,000 | $67K |
| Mackenzie Financial Corp. | 0.00% | New | 13,819 | $62K |
| HSBC Holdings PLC | 0.00% | New | 12,608 | $56K |
| Fox Run Management, L.L.C. | 0.01% | New | 12,261 | $55K |
| Victory Capital Management Inc. | 0.00% | Reduce -5.1% | 12,087 | $54K |
| Inceptionr LLC | 0.01% | New | 11,188 | $50K |
| California State Teachers Retirement System | 0.00% | Reduce -38.9% | 11,145 | $50K |
| Legal & General Group Plc | 0.00% | Reduce -62.4% | 11,097 | $50K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 9,896 | $44K |
| Russell Investments Group, Ltd. | 0.00% | Add +976.6% | 9,453 | $42K |
| Simplex Trading, LLC | 0.00% | Add +38.2% | 8,040 | $36K |
| Metropolitan Life Insurance Co | 0.00% | Add +200.2% | 4,677 | $21K |
| Amalgamated Bank | 0.00% | Reduce -68.0% | 3,769 | $17K |
| Osaic Holdings, Inc. | 0.00% | Reduce -1.5% | 3,778 | $17K |
| Royal Bank of Canada | 0.00% | Reduce -92.7% | 2,548 | $11K |
| STRS Ohio | 0.00% | Reduce -4.0% | 2,400 | $10K |
| Pacer Advisors, Inc. | 0.00% | New | 1,716 | $8K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -96.7% | 820 | $4K |
| PNC Financial Services Group, Inc. | 0.00% | No change | 200 | $896 |
| Federated Hermes, Inc. | 0.00% | New | 176 | $788 |
| North Star Investment Management Corp. | 0.00% | No change | 150 | $672 |
| Avior Wealth Management, LLC | 0.00% | New | 22 | $98 |
| Frazier Financial Advisors, LLC | 0.00% | New | 5 | $23 |
| Farther Finance Advisors, LLC | 0.00% | No change | 1 | $4 |
| Cwm, LLC | 0.00% | New | 5 | $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.