Mereo BioPharma Group plc
MREO- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001719714
No open-market purchases or sales by Mereo BioPharma Group plc insiders were filed in the last 90 days; 60 institutions reported holding it in 13F filings for Q2 2026, worth $18.0M in total; no superinvestor holds it.
13F holders, Q3 2025
Institutional positions in Mereo BioPharma Group plc as of Sep 30, 2025. 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
- 84
- −2 vs. Q2 2025
- Shares held
- 100.2M
- +1.49M (+1.5%) vs. Q2 2025
- Total value
- $206.7M
- −$61.1M (−22.8%) vs. Q2 2025
- New holders
- 14
- 23 more added
- Sold out
- 16
- 23 more reduced
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MREO 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 | 60 | $18.0M |
| Q1 2026 | 63 | $24.9M |
| Q4 2025 | 70 | $25.8M |
| Q3 2025 | 84 | $206.7M |
| Q2 2025 | 86 | $267.8M |
| Q1 2025 | 90 | $250.3M |
| Q4 2024 | 91 | $403.1M |
| Q3 2024 | 77 | $434.8M |
| Q2 2024 | 79 | $361.9M |
| Q1 2024 | 80 | $277.3M |
| Q4 2023 | 64 | $181.4M |
| Q3 2023 | 56 | $90.4M |
| Q2 2023 | 53 | $84.3M |
| Q1 2023 | 58 | $43.0M |
| Q4 2022 | 61 | $46.2M |
| Q3 2022 | 63 | $58.5M |
| Q2 2022 | 64 | $82.7M |
| Q1 2022 | 60 | $99.9M |
| Q4 2021 | 73 | $145.7M |
| Q3 2021 | 63 | $212.2M |
| Q2 2021 | 72 | $284.4M |
| Q1 2021 | 67 | $304.5M |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Mereo BioPharma Group plc; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Janus Henderson Group PLC | 16,290,130 | $33.6M | 0.02% | −1,398,462−7.9% | Reduced |
| Rubric Capital Management LP | 15,307,347 | $31.5M | 0.42% | 00.0% | Unchanged |
| Frazier Life Sciences Management, L.P. | 9,440,112 | $19.4M | 0.58% | 00.0% | Unchanged |
| Mangrove Partners | 7,790,580 | $16.0M | 1.33% | −845,905−9.8% | Reduced |
| Standard Life Aberdeen plc | 5,538,699 | $11.4M | 0.02% | +2,509,827+82.9% | Added |
| 683 Capital Management, LLC | 4,875,000 | $10.0M | 0.91% | +525,000+12.1% | Added |
| Rock Springs Capital Management LP | 4,570,649 | $9.42M | 0.55% | +105,357+2.4% | Added |
| Clearline Capital LP | 3,834,163 | $7.90M | 0.68% | +216,000+6.0% | Added |
| Alkeon Capital Management LLC | 3,698,100 | $7.62M | 0.03% | −1,000,000−21.3% | Reduced |
| Morgan Stanley | 3,346,347 | $6.89M | 0.00% | +2,560,970+326.1% | Added |
| Citadel Advisors LLC | 3,171,632 | $6.53M | 0.01% | +2,410,973+317.0% | Added |
| Goldman Sachs Group Inc | 2,364,024 | $4.87M | 0.00% | −726,044−23.5% | Reduced |
| Tejara Capital Ltd | 1,906,844 | $3.93M | 2.15% | −523,593−21.5% | Reduced |
| UBS Asset Management Americas Inc | 1,906,775 | $3.93M | 0.00% | +1,906,775 | New |
| Schonfeld Strategic Advisors LLC | 1,732,724 | $3.57M | 0.02% | +823,084+90.5% | Added |
| FMR LLC | 1,454,900 | $3.00M | 0.00% | −23,600−1.6% | Reduced |
| Blue Owl Capital Holdings LP | 1,250,000 | $2.58M | 0.80% | +1,250,000 | New |
| Two Sigma Investments, LP | 1,088,096 | $2.24M | 0.00% | +428,938+65.1% | Added |
| UBS Group AG | 970,667 | $2.00M | 0.00% | +597,162+159.9% | Added |
| Monaco Asset Management SAM | 945,915 | $1.95M | 0.73% | +550,915+139.5% | Added |
| HealthInvest Partners AB | 764,901 | $1.67M | 0.62% | 00.0% | Unchanged |
| Marshall Wace, LLP | 767,744 | $1.58M | 0.00% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 590,871 | $1.22M | 0.00% | −889,600−60.1% | Reduced |
| Logos Global Management LP | 500,000 | $1.03M | 0.10% | +500,000 | New |
| Susquehanna International Group, LLP | 493,378 | $1.02M | 0.00% | +131,836+36.5% | Added |
| Artia Global Partners LP | 475,361 | $979.2K | 0.17% | 00.0% | Unchanged |
| Jane Street Group, LLC | 452,362 | $931.9K | 0.00% | +204,921+82.8% | Added |
| BlackRock, Inc. | 444,004 | $914.6K | 0.00% | −11,361−2.5% | Reduced |
| Bank of America Corp | 438,622 | $903.6K | 0.00% | −390.0% | Reduced |
| Millennium Management LLC | 337,503 | $695.3K | 0.00% | −258,170−43.3% | Reduced |
| Knott David M Jr | 300,337 | $618.7K | 0.26% | −19,000−5.9% | Reduced |
| Soleus Capital Management, L.P. | 299,711 | $617.4K | 0.03% | −300,000−50.0% | Reduced |
| Hudson Bay Capital Management LP | 265,000 | $545.9K | 0.00% | −185,000−41.1% | Reduced |
| Knoll Capital Management, LLC | 260,470 | $536.6K | 0.29% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 256,378 | $522.0K | 0.00% | +256,378 | New |
| Two Sigma Advisers, LP | 242,200 | $498.9K | 0.00% | +97,600+67.5% | Added |
| Simplex Trading, LLC | 196,269 | $404.0K | 0.01% | −4,872−2.4% | Reduced |
| XTX Topco Ltd | 191,037 | $393.5K | 0.02% | +121,696+175.5% | Added |
| Caption Management, LLC | 189,914 | $391.2K | 0.02% | −7,685−3.9% | Reduced |
| Group One Trading, L.P. | 136,588 | $281.4K | 0.01% | −2,971−2.1% | Reduced |
| State Street Corp | 132,701 | $273.4K | 0.00% | +87,759+195.3% | Added |
| Cantor Fitzgerald, L. P. | 110,000 | $226.6K | 0.00% | −232,957−67.9% | Reduced |
| Nomura Holdings Inc | 103,800 | $213.8K | 0.00% | −21,200−17.0% | Reduced |
| Geode Capital Management, LLC | 92,534 | $190.6K | 0.00% | 00.0% | Unchanged |
| Clear Harbor Asset Management, LLC | 77,000 | $158.6K | 0.01% | +35,000+83.3% | Added |
| Gsa Capital Partners LLP | 58,145 | $120.0K | 0.01% | +58,145 | New |
| Aquatic Capital Management LLC | 53,712 | $110.6K | 0.00% | +26,782+99.5% | Added |
| Significant Wealth Partners LLC | 47,814 | $98.5K | 0.05% | +25,553+114.8% | Added |
| Virtus Investment Advisers, Inc. | 40,930 | $84.3K | 0.02% | +7,105+21.0% | Added |
| Avanza Fonder AB | 38,235 | $78.8K | 0.00% | 00.0% | Unchanged |
| Blue Rock Wealth Management LLC | 37,000 | $76.2K | 0.05% | 00.0% | Unchanged |
| HRT Financial LP | 34,852 | $71.0K | 0.00% | +34,852 | New |
| Forefront Analytics, LLC | 33,180 | $68.4K | 0.07% | +14,042+73.4% | Added |
| Forefront Wealth Partners, LLC | 33,180 | $68.4K | 0.02% | +33,180 | New |
| Squarepoint Ops LLC | 30,055 | $61.9K | 0.00% | +9,387+45.4% | Added |
| Centiva Capital, LP | 25,000 | $51.5K | 0.00% | 00.0% | Unchanged |
| Federation des caisses Desjardins du Quebec | 21,271 | $43.8K | 0.00% | +21,271 | New |
| Golden State Equity Partners | 19,900 | $41.0K | 0.01% | 00.0% | Unchanged |
| Resources Investment Advisors, LLC. | 18,300 | $37.7K | 0.00% | 00.0% | Unchanged |
| PFG Investments, LLC | 17,150 | $35.3K | 0.00% | −20,283−54.2% | Reduced |
| Sheets Smith Investment Management | 16,890 | $34.8K | 0.02% | 00.0% | Unchanged |
| Virtu Financial LLC | 15,970 | $33.0K | 0.00% | +15,970 | New |
| State of New Jersey Common Pension Fund D | 15,644 | $32.2K | 0.00% | +15,644 | New |
| Newbridge Financial Services Group, Inc. | 13,000 | $26.8K | 0.00% | 00.0% | Unchanged |
| Scientech Research LLC | 10,124 | $20.9K | 0.01% | +10,124 | New |
| Level Four Advisory Services, LLC | 10,000 | $20.6K | 0.00% | 00.0% | Unchanged |
| GAMMA Investing LLC | 9,181 | $18.9K | 0.00% | −76−0.8% | Reduced |
| Rhumbline Advisers | 9,122 | $18.8K | 0.00% | −756−7.7% | Reduced |
| Caitong International Asset Management Co., Ltd | 8,476 | $17.5K | 0.01% | +3,932+86.5% | Added |
| Advisor Group Holdings, Inc. | 5,677 | $9.71K | 0.00% | +300+5.6% | Added |
| SRS Capital Advisors, Inc. | 4,000 | $8.24K | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 2,000 | $4.12K | 0.00% | +2,000 | New |
| Allworth Financial LP | 1,573 | $3.24K | 0.00% | −64−3.9% | Reduced |
| GPS Wealth Strategies Group, LLC | 1,500 | $3.09K | 0.00% | 00.0% | Unchanged |
| Wealthspire Advisors, LLC | 1,026 | $2.11K | 0.00% | +1,026 | New |
| Sit Investment Associates Inc | 970 | $2.00K | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 417 | $859 | 0.00% | −53−11.3% | Reduced |
| MAI Capital Management | 309 | $637 | 0.00% | 00.0% | Unchanged |
| New England Capital Financial Advisors LLC | 300 | $618 | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 230 | $473 | 0.00% | 00.0% | Unchanged |
| Principal Securities, Inc. | 75 | $155 | 0.00% | 00.0% | Unchanged |
| US Bancorp | 13 | $27 | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 3 | $6 | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 5 | $0 | 0.00% | +5 | New |
| Deerfield Management Company, L.P. (Series C) | 0 | $0 | 0.00% | −6,710,429−100.0% | Sold out |
| Paloma Partners Management Co | 0 | $0 | 0.00% | −296,659−100.0% | Sold out |
| Dauntless Investment Group, LLC | 0 | $0 | 0.00% | −134,122−100.0% | Sold out |
| NEOS Investment Management LLC | 0 | $0 | 0.00% | −102,583−100.0% | Sold out |
| Tema ETFs LLC | 0 | $0 | 0.00% | −102,583−100.0% | Sold out |
| Leonteq Securities AG | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −59,200−100.0% | Sold out |
| J. Goldman & Co LP | 0 | $0 | 0.00% | −52,384−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −25,399−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −21,176−100.0% | Sold out |
| Cubist Systematic Strategies, LLC | 0 | $0 | 0.00% | −21,099−100.0% | Sold out |
| Marex Group plc | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |
| Raymond James Financial Inc | 0 | $0 | 0.00% | −1,570−100.0% | Sold out |
| Skopos Labs, Inc. | 0 | $0 | 0.00% | −849−100.0% | Sold out |
| Signaturefd, LLC | 0 | $0 | 0.00% | −187−100.0% | Sold out |
| Transce3nd, LLC | 0 | $0 | 0.00% | −127−100.0% | Sold out |