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, Q4 2025
Institutional positions in Mereo BioPharma Group plc as of Dec 31, 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
- 70
- −13 vs. Q3 2025
- Shares held
- 62.0M
- −38.2M (−38.1%) vs. Q3 2025
- Total value
- $25.8M
- −$180.8M (−87.5%) vs. Q3 2025
- New holders
- 22
- 15 more added
- Sold out
- 35
- 20 more reduced
1 institution that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Mereo BioPharma Group plc; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Rubric Capital Management LP | 15,307,347 | $6.38M | 0.08% | 00.0% | Unchanged |
| 683 Capital Management, LLC | 15,025,000 | $6.26M | 0.52% | +10,150,000+208.2% | Added |
| EcoR1 Capital, LLC | 7,856,466 | $3.27M | 0.15% | +7,856,466 | New |
| Schonfeld Strategic Advisors LLC | 6,090,381 | $2.54M | 0.01% | +4,357,657+251.5% | Added |
| Tejara Capital Ltd | 2,159,681 | $899.9K | 0.37% | +252,837+13.3% | Added |
| Logos Global Management LP | 1,850,000 | $770.9K | 0.05% | +1,350,000+270.0% | Added |
| UBS Asset Management Americas Inc | 1,763,666 | $735.4K | 0.00% | −143,109−7.5% | Reduced |
| Monaco Asset Management SAM | 1,585,214 | $660.6K | 0.20% | +639,299+67.6% | Added |
| UBS Group AG | 1,558,931 | $650.1K | 0.00% | +588,264+60.6% | Added |
| Balyasny Asset Management LLC | 1,280,275 | $533.5K | 0.00% | +1,280,275 | New |
| Morgan Stanley | 1,273,785 | $530.8K | 0.00% | −2,072,562−61.9% | Reduced |
| Two Sigma Investments, LP | 525,125 | $218.8K | 0.00% | −562,971−51.7% | Reduced |
| Group One Trading, L.P. | 441,636 | $184.0K | 0.01% | +305,048+223.3% | Added |
| Simplex Trading, LLC | 419,477 | $174.9K | 0.00% | +223,208+113.7% | Added |
| EntryPoint Capital, LLC | 400,700 | $167.0K | 0.07% | +400,700 | New |
| Luminus Management LLC | 395,000 | $164.6K | 0.15% | +395,000 | New |
| Rangeley Capital, LLC | 364,000 | $151.7K | 0.13% | +364,000 | New |
| Jane Street Group, LLC | 356,004 | $148.3K | 0.00% | −96,358−21.3% | Reduced |
| BlackRock, Inc. | 312,613 | $130.3K | 0.00% | −131,391−29.6% | Reduced |
| Knott David M Jr | 300,337 | $125.2K | 0.06% | 00.0% | Unchanged |
| Quadrature Capital Ltd | 266,731 | $111.1K | 0.00% | +266,731 | New |
| Sphera Funds Management Ltd. | 255,400 | $106.4K | 0.02% | +255,400 | New |
| Two Sigma Advisers, LP | 251,900 | $105.0K | 0.00% | +9,700+4.0% | Added |
| Newtyn Management, LLC | 224,622 | $93.6K | 0.01% | +224,622 | New |
| Citigroup Inc | 195,814 | $81.6K | 0.00% | +195,814 | New |
| Renaissance Technologies LLC | 194,371 | $81.0K | 0.00% | −396,500−67.1% | Reduced |
| ADAR1 Capital Management, LLC | 150,000 | $62.5K | 0.00% | +150,000 | New |
| State Street Corp | 130,643 | $54.4K | 0.00% | −2,058−1.6% | Reduced |
| Virtus Investment Advisers, Inc. | 122,595 | $51.1K | 0.01% | +81,665+199.5% | Added |
| Graham Capital Management, L.P. | 116,286 | $48.5K | 0.00% | +116,286 | New |
| Geode Capital Management, LLC | 92,534 | $38.6K | 0.00% | 00.0% | Unchanged |
| Millennium Management LLC | 83,646 | $34.9K | 0.00% | −253,857−75.2% | Reduced |
| Baader Bank INC | 128,742 | $33.1K | 0.00% | +128,742 | New |
| Acadian Asset Management LLC | 61,435 | $24.0K | 0.00% | −194,943−76.0% | Reduced |
| Caption Management, LLC | 50,000 | $20.8K | 0.00% | −139,914−73.7% | Reduced |
| Engineers Gate Manager LP | 49,798 | $20.8K | 0.00% | +49,798 | New |
| Clear Harbor Asset Management, LLC | 35,000 | $14.6K | 0.00% | −42,000−54.5% | Reduced |
| Forefront Analytics, LLC | 31,768 | $13.2K | 0.01% | −1,412−4.3% | Reduced |
| Goldman Sachs Group Inc | 28,026 | $11.7K | 0.00% | −2,335,998−98.8% | Reduced |
| Bank of America Corp | 25,492 | $10.6K | 0.00% | −413,130−94.2% | Reduced |
| Centiva Capital, LP | 25,000 | $10.4K | 0.00% | 00.0% | Unchanged |
| Significant Wealth Partners LLC | 21,689 | $9.04K | 0.01% | −26,125−54.6% | Reduced |
| Aquatic Capital Management LLC | 21,216 | $8.84K | 0.00% | −32,496−60.5% | Reduced |
| SmartHarvest Portfolios, LLC | 20,290 | $8.46K | 0.00% | +20,290 | New |
| Rhumbline Advisers | 19,146 | $7.98K | 0.00% | +10,024+109.9% | Added |
| Blue Rock Wealth Management LLC | 19,000 | $7.92K | 0.00% | −18,000−48.6% | Reduced |
| Resources Investment Advisors, LLC. | 18,300 | $7.63K | 0.00% | 00.0% | Unchanged |
| Newbridge Financial Services Group, Inc. | 17,000 | $7.08K | 0.00% | +4,000+30.8% | Added |
| PFG Investments, LLC | 16,650 | $6.94K | 0.00% | −500−2.9% | Reduced |
| Barclays PLC | 14,500 | $6.04K | 0.00% | +14,500 | New |
| QRG Capital Management, Inc. | 13,503 | $5.63K | 0.00% | +13,503 | New |
| AE Wealth Management LLC | 12,563 | $5.24K | 0.00% | +12,563 | New |
| MML Investors Services, LLC | 12,200 | $5.08K | 0.00% | +12,200 | New |
| Astoria Portfolio Advisors LLC. | 10,000 | $4.03K | 0.00% | +10,000 | New |
| GAMMA Investing LLC | 9,561 | $3.98K | 0.00% | +380+4.1% | Added |
| Toronto Dominion Bank | 5,500 | $2.29K | 0.00% | +5,500 | New |
| SRS Capital Advisors, Inc. | 4,000 | $1.67K | 0.00% | 00.0% | Unchanged |
| Caitong International Asset Management Co., Ltd | 2,231 | $930 | 0.00% | −6,245−73.7% | Reduced |
| Rockefeller Capital Management L.P. | 2,000 | $833 | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 1,737 | $724 | 0.00% | +1,507+655.2% | Added |
| Allworth Financial LP | 1,611 | $672 | 0.00% | +38+2.4% | Added |
| Advisor Group Holdings, Inc. | 500 | $208 | 0.00% | −5,177−91.2% | Reduced |
| EverSource Wealth Advisors, LLC | 417 | $174 | 0.00% | 00.0% | Unchanged |
| MAI Capital Management | 309 | $129 | 0.00% | 00.0% | Unchanged |
| New England Capital Financial Advisors LLC | 300 | $126 | 0.00% | 00.0% | Unchanged |
| SageView Advisory Group, LLC | 161 | $68 | 0.00% | +161 | New |
| Farther Finance Advisors, LLC | 17 | $7 | 0.00% | +17 | New |
| US Bancorp | 13 | $5 | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 3 | $1 | 0.00% | 00.0% | Unchanged |
| Sit Investment Associates Inc | 970 | $0 | 0.00% | 00.0% | Unchanged |
| Janus Henderson Group PLC | 0 | $0 | 0.00% | −16,290,130−100.0% | Sold out |
| Frazier Life Sciences Management, L.P. | 0 | $0 | 0.00% | −9,440,112−100.0% | Sold out |
| Mangrove Partners | 0 | $0 | 0.00% | −7,790,580−100.0% | Sold out |
| Standard Life Aberdeen plc | 0 | $0 | 0.00% | −5,538,699−100.0% | Sold out |
| Rock Springs Capital Management LP | 0 | $0 | 0.00% | −4,570,649−100.0% | Sold out |
| Clearline Capital LP | 0 | $0 | 0.00% | −3,834,163−100.0% | Sold out |
| Alkeon Capital Management LLC | 0 | $0 | 0.00% | −3,698,100−100.0% | Sold out |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −3,171,632−100.0% | Sold out |
| FMR LLC | 0 | $0 | 0.00% | −1,454,900−100.0% | Sold out |
| Blue Owl Capital Holdings LP | 0 | $0 | 0.00% | −1,250,000−100.0% | Sold out |
| HealthInvest Partners AB | 0 | $0 | 0.00% | −764,901−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −767,744−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −493,378−100.0% | Sold out |
| Artia Global Partners LP | 0 | $0 | 0.00% | −475,361−100.0% | Sold out |
| Soleus Capital Management, L.P. | 0 | $0 | 0.00% | −299,711−100.0% | Sold out |
| Hudson Bay Capital Management LP | 0 | $0 | 0.00% | −265,000−100.0% | Sold out |
| Knoll Capital Management, LLC | 0 | $0 | 0.00% | −260,470−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −191,037−100.0% | Sold out |
| Cantor Fitzgerald, L. P. | 0 | $0 | 0.00% | −110,000−100.0% | Sold out |
| Nomura Holdings Inc | 0 | $0 | 0.00% | −103,800−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −58,145−100.0% | Sold out |
| Avanza Fonder AB | 0 | $0 | 0.00% | −38,235−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −34,852−100.0% | Sold out |
| Forefront Wealth Partners, LLC | 0 | $0 | 0.00% | −33,180−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −30,055−100.0% | Sold out |
| Federation des caisses Desjardins du Quebec | 0 | $0 | 0.00% | −21,271−100.0% | Sold out |
| Golden State Equity Partners | 0 | $0 | 0.00% | −19,900−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −15,970−100.0% | Sold out |
| State of New Jersey Common Pension Fund D | 0 | $0 | 0.00% | −15,644−100.0% | Sold out |
| Scientech Research LLC | 0 | $0 | 0.00% | −10,124−100.0% | Sold out |