MetseraMTSR
13F holders, Q3 2025 (September 30)155holders +46
68new positions
23sold out
3famous investors
$52.33avg. 13F price*
At the end of Q3 2025, 155 institutions reported holding Metsera Inc. (MTSR) in their 13F filings, up 46 from Q2 2025. 68 opened new positions and 23 sold out. The largest holders were FMR LLC ($727.0M), Vanguard Group Inc. ($304.8M) and Janus Henderson Group PLC ($280.1M). 3 famous investors held it, including Israel Englander (0.0% of Millennium Management's portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and Cliff Asness (0.0% of AQR Capital Management's portfolio).
- Company
- Metsera Inc.
- CUSIP
- 59267L107
- Latest filing quarter
- Q4 2025
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 68 | $308.0M |
| Exits | 23 | $247.6M |
All 13F filers, Q2 2025 → Q3 2025: 20,470,027 shares bought and 16,825,760 shares sold, net +3,644,267 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 155 holders
| FMR LLC | 0.04% | Reduce -11.8% | 13,891,986 | $727.0M |
| Vanguard Group Inc. | 0.00% | Add +290.6% | 5,824,993 | $304.8M |
| Janus Henderson Group PLC | 0.13% | Add +58.0% | 5,352,751 | $280.1M |
| BlackRock, Inc. | 0.00% | Add +210.0% | 3,835,309 | $200.7M |
| Alphabet Inc. | 8.22% | Reduce -23.8% | 3,783,528 | $198.0M |
| Venrock Adviser, LLC | 11.05% | No change | 3,750,662 | $196.3M |
| Wellington Management Group LLP | 0.03% | Add +6.8% | 3,659,465 | $191.5M |
| Softbank Group Corp. | 0.74% | Reduce -24.2% | 3,654,691 | $191.2M |
| HBK Investments L P | 2.78% | New | 3,200,000 | $167.5M |
| State Street Corp. | 0.00% | Add +318.4% | 2,511,076 | $131.4M |
| Alpha Wave Global, LP | 12.64% | No change | 2,384,050 | $124.8M |
| T. Rowe Price Investment Management, Inc. | 0.07% | Reduce -22.6% | 2,327,354 | $121.8M |
| Geode Capital Management, LLC | 0.00% | Add +200.5% | 1,403,002 | $73.4M |
| Ra Capital Management, L.P. | 0.44% | No change | 675,525 | $35.4M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +275.0% | 511,465 | $26.8M |
| Bank of America Corp. | 0.00% | Add +799.0% | 455,605 | $23.8M |
| Northern Trust Corp. | 0.00% | Add +222.5% | 437,839 | $22.9M |
| Woodline Partners LP | 0.10% | No change | 400,785 | $21.0M |
| Cormorant Asset Management, LP | 1.44% | No change | 400,000 | $20.9M |
| Eventide Asset Management, LLC | 0.34% | No change | 396,160 | $20.7M |
| JPMorgan Chase & Co. | 0.00% | Add +2008.1% | 325,178 | $17.0M |
| Hudson Bay Capital Management LP | 0.12% | New | 323,836 | $16.9M |
| American Century Companies Inc. | 0.01% | Reduce -0.4% | 286,448 | $15.0M |
| EcoR1 Capital, LLC | 0.68% | No change | 271,529 | $14.2M |
| Glazer Capital, LLC | 0.52% | New | 270,662 | $14.2M |
| Barclays PLC | 0.00% | Add +294.1% | 221,064 | $11.6M |
| Wealthspire Advisors, LLC | 0.06% | New | 213,085 | $11.2M |
| Alpine Associates Management Inc. | 0.62% | New | 195,200 | $10.2M |
| Balyasny Asset Management L.P. | 0.02% | New | 177,228 | $9.3M |
| Goldman Sachs Group Inc. | 0.00% | Add +354.0% | 176,847 | $9.3M |
| Susquehanna International Group, LLP | 0.01% | Add +691.4% | 168,477 | $8.8M |
| Bank of New York Mellon Corp | 0.00% | Add +314.3% | 163,726 | $8.6M |
| ADAR1 Capital Management, LLC | 0.80% | New | 152,521 | $8.0M |
| UBS Group AG | 0.00% | Add +204.6% | 140,923 | $7.4M |
| Avidity Partners Management LP | 1.67% | New | 140,500 | $7.4M |
| Man Group plc | 0.01% | New | 140,000 | $7.3M |
| Nuveen, LLC | 0.00% | Add +236.6% | 126,111 | $6.6M |
| Millennium Management | 0.01% | New | 120,356 | $6.3M |
| Ensign Peak Advisors, Inc | 0.01% | No change | 107,318 | $5.6M |
| Rafferty Asset Management, LLC | 0.02% | Add +436.3% | 103,465 | $5.4M |
| Royce & Associates LP | 0.05% | Reduce -69.1% | 102,300 | $5.4M |
| Greenwich Wealth Management LLC | 0.24% | New | 93,224 | $4.9M |
| Morgan Stanley | 0.00% | Add +45.7% | 92,938 | $4.9M |
| SCS Capital Management LLC | 0.05% | New | 89,375 | $4.7M |
| Schonfeld Strategic Advisors LLC | 0.03% | New | 76,393 | $4.0M |
| Rhumbline Advisers | 0.00% | Add +185.9% | 73,144 | $3.8M |
| Verition Fund Management LLC | 0.02% | Add +508.5% | 70,928 | $3.7M |
| TD Asset Management Inc | 0.00% | Add +83.9% | 67,732 | $3.5M |
| Jane Street Group, LLC | 0.00% | New | 59,451 | $3.1M |
| Wells Fargo & Company | 0.00% | Add +246.8% | 59,071 | $3.1M |
| TIG Advisors, LLC | 0.19% | New | 58,353 | $3.1M |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -96.0% | 54,328 | $2.8M |
| Citigroup Inc. | 0.00% | Add +395.2% | 54,241 | $2.8M |
| Alliancebernstein L.P. | 0.00% | Reduce -96.2% | 53,603 | $2.8M |
| Alps Advisors Inc. | 0.01% | Reduce -11.9% | 49,943 | $2.6M |
| Ameriprise Financial Inc. | 0.00% | New | 47,650 | $2.5M |
| Swiss National Bank | 0.00% | Add +1.5% | 40,700 | $2.1M |
| Vestcor Inc | 0.06% | New | 40,000 | $2.1M |
| AQR Arbitrage LLC | 0.07% | New | 38,959 | $2.0M |
| Deutsche Bank AG | 0.00% | Add +227.6% | 38,926 | $2.0M |
| Lighthouse Investment Partners, LLC | 0.07% | New | 36,104 | $1.9M |
| Invesco Ltd. | 0.00% | Add +164.5% | 31,676 | $1.7M |
| MetLife Investment Management, LLC | 0.01% | Add +188.6% | 31,324 | $1.6M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +182.2% | 30,093 | $1.6M |
| Stifel Financial Corp. | 0.00% | New | 29,963 | $1.6M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -45.6% | 28,895 | $1.5M |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -47.8% | 28,844 | $1.5M |
| First Trust Advisors LP | 0.00% | New | 27,691 | $1.4M |
| Citadel Advisors | 0.00% | Reduce -88.1% | 27,526 | $1.4M |
| Virtu Financial LLC | 0.08% | New | 25,923 | $1.4M |
| Exchange Traded Concepts, LLC | 0.01% | Reduce -36.8% | 25,607 | $1.3M |
| SG Americas Securities, LLC | 0.00% | Reduce -50.5% | 23,612 | $1.2M |
| Legal & General Group Plc | 0.00% | Add +1.1% | 23,491 | $1.2M |
| Profund Advisors LLC | 0.04% | New | 22,319 | $1.2M |
| California State Teachers Retirement System | 0.00% | Reduce -8.9% | 21,877 | $1.1M |
| Water Island Capital LLC | 0.15% | New | 18,730 | $980K |
| XTX Topco Ltd | 0.05% | New | 18,207 | $953K |
| Harvest Management LLC | 0.46% | New | 18,000 | $942K |
| Quinn Opportunity Partners LLC | 0.07% | New | 17,951 | $939K |
| Qube Research & Technologies Ltd | 0.00% | New | 16,034 | $839K |
| Gabelli Funds LLC | 0.01% | New | 15,000 | $785K |
| Police & Firemen's Retirement System of New Jersey | 0.01% | Add +241.0% | 14,640 | $766K |
| ProShare Advisors LLC | 0.00% | New | 14,413 | $754K |
| CSS LLC | 0.12% | New | 13,531 | $708K |
| Keebeck Wealth Management | 0.08% | New | 12,262 | $642K |
| BNP Paribas Financial Markets | 0.00% | Add +578.7% | 10,859 | $568K |
| Dimensional Fund Advisors LP | 0.00% | New | 10,770 | $564K |
| Quantinno Capital Management LP | 0.00% | New | 10,756 | $563K |
| Hamilton Lane Advisors LLC | 0.30% | New | 9,810 | $513K |
| Voya Investment Management LLC | 0.00% | New | 9,494 | $497K |
| State Board of Administration of Florida Retirement System | 0.00% | New | 9,320 | $488K |
| Knollwood Investment Advisory, LLC | 0.04% | New | 9,227 | $483K |
| Simplex Trading, LLC | 0.01% | Add +57.2% | 9,114 | $476K |
| Corient Private Wealth LP | 0.00% | Reduce -33.3% | 8,743 | $458K |
| Fifth Lane Capital, LP | 0.45% | New | 8,333 | $436K |
| Prudential Financial Inc. | 0.00% | Reduce -57.5% | 6,835 | $358K |
| AQR Capital Management | 0.00% | New | 6,666 | $349K |
| Walleye Capital LLC | 0.00% | New | 6,230 | $326K |
| Arizona State Retirement System | 0.00% | New | 6,205 | $325K |
| New York State Common Retirement Fund | 0.00% | No change | 6,000 | $314K |
"% of holder's portfolio" is MTSR's weight in each manager's 13F, not the share of Metsera Inc. the manager owns.