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 |
|---|---|---|---|---|---|
| Sit Investment Associates Inc | 970 | $0 | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 3 | $1 | 0.00% | 00.0% | Unchanged |
| US Bancorp | 13 | $5 | 0.00% | 00.0% | Unchanged |
| Farther Finance Advisors, LLC | 17 | $7 | 0.00% | +17 | New |
| SageView Advisory Group, LLC | 161 | $68 | 0.00% | +161 | New |
| New England Capital Financial Advisors LLC | 300 | $126 | 0.00% | 00.0% | Unchanged |
| MAI Capital Management | 309 | $129 | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 417 | $174 | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 500 | $208 | 0.00% | −5,177−91.2% | Reduced |
| Allworth Financial LP | 1,611 | $672 | 0.00% | +38+2.4% | Added |
| Wells Fargo & Company | 1,737 | $724 | 0.00% | +1,507+655.2% | Added |
| Rockefeller Capital Management L.P. | 2,000 | $833 | 0.00% | 00.0% | Unchanged |
| Caitong International Asset Management Co., Ltd | 2,231 | $930 | 0.00% | −6,245−73.7% | Reduced |
| SRS Capital Advisors, Inc. | 4,000 | $1.67K | 0.00% | 00.0% | Unchanged |
| Toronto Dominion Bank | 5,500 | $2.29K | 0.00% | +5,500 | New |
| GAMMA Investing LLC | 9,561 | $3.98K | 0.00% | +380+4.1% | Added |
| Astoria Portfolio Advisors LLC. | 10,000 | $4.03K | 0.00% | +10,000 | New |
| MML Investors Services, LLC | 12,200 | $5.08K | 0.00% | +12,200 | New |
| AE Wealth Management LLC | 12,563 | $5.24K | 0.00% | +12,563 | New |
| QRG Capital Management, Inc. | 13,503 | $5.63K | 0.00% | +13,503 | New |
| Barclays PLC | 14,500 | $6.04K | 0.00% | +14,500 | New |
| PFG Investments, LLC | 16,650 | $6.94K | 0.00% | −500−2.9% | Reduced |
| Newbridge Financial Services Group, Inc. | 17,000 | $7.08K | 0.00% | +4,000+30.8% | Added |
| Resources Investment Advisors, LLC. | 18,300 | $7.63K | 0.00% | 00.0% | Unchanged |
| Blue Rock Wealth Management LLC | 19,000 | $7.92K | 0.00% | −18,000−48.6% | Reduced |
| Rhumbline Advisers | 19,146 | $7.98K | 0.00% | +10,024+109.9% | Added |
| SmartHarvest Portfolios, LLC | 20,290 | $8.46K | 0.00% | +20,290 | New |
| Aquatic Capital Management LLC | 21,216 | $8.84K | 0.00% | −32,496−60.5% | Reduced |
| Significant Wealth Partners LLC | 21,689 | $9.04K | 0.01% | −26,125−54.6% | Reduced |
| Centiva Capital, LP | 25,000 | $10.4K | 0.00% | 00.0% | Unchanged |
| Bank of America Corp | 25,492 | $10.6K | 0.00% | −413,130−94.2% | Reduced |
| Goldman Sachs Group Inc | 28,026 | $11.7K | 0.00% | −2,335,998−98.8% | Reduced |
| Forefront Analytics, LLC | 31,768 | $13.2K | 0.01% | −1,412−4.3% | Reduced |
| Clear Harbor Asset Management, LLC | 35,000 | $14.6K | 0.00% | −42,000−54.5% | Reduced |
| Engineers Gate Manager LP | 49,798 | $20.8K | 0.00% | +49,798 | New |
| Caption Management, LLC | 50,000 | $20.8K | 0.00% | −139,914−73.7% | Reduced |
| Acadian Asset Management LLC | 61,435 | $24.0K | 0.00% | −194,943−76.0% | Reduced |
| Baader Bank INC | 128,742 | $33.1K | 0.00% | +128,742 | New |
| Millennium Management LLC | 83,646 | $34.9K | 0.00% | −253,857−75.2% | Reduced |
| Geode Capital Management, LLC | 92,534 | $38.6K | 0.00% | 00.0% | Unchanged |
| Graham Capital Management, L.P. | 116,286 | $48.5K | 0.00% | +116,286 | New |
| Virtus Investment Advisers, Inc. | 122,595 | $51.1K | 0.01% | +81,665+199.5% | Added |
| State Street Corp | 130,643 | $54.4K | 0.00% | −2,058−1.6% | Reduced |
| ADAR1 Capital Management, LLC | 150,000 | $62.5K | 0.00% | +150,000 | New |
| Renaissance Technologies LLC | 194,371 | $81.0K | 0.00% | −396,500−67.1% | Reduced |
| Citigroup Inc | 195,814 | $81.6K | 0.00% | +195,814 | New |
| Newtyn Management, LLC | 224,622 | $93.6K | 0.01% | +224,622 | New |
| Two Sigma Advisers, LP | 251,900 | $105.0K | 0.00% | +9,700+4.0% | Added |
| Sphera Funds Management Ltd. | 255,400 | $106.4K | 0.02% | +255,400 | New |
| Quadrature Capital Ltd | 266,731 | $111.1K | 0.00% | +266,731 | New |
| Knott David M Jr | 300,337 | $125.2K | 0.06% | 00.0% | Unchanged |
| BlackRock, Inc. | 312,613 | $130.3K | 0.00% | −131,391−29.6% | Reduced |
| Jane Street Group, LLC | 356,004 | $148.3K | 0.00% | −96,358−21.3% | Reduced |
| Rangeley Capital, LLC | 364,000 | $151.7K | 0.13% | +364,000 | New |
| Luminus Management LLC | 395,000 | $164.6K | 0.15% | +395,000 | New |
| EntryPoint Capital, LLC | 400,700 | $167.0K | 0.07% | +400,700 | New |
| Simplex Trading, LLC | 419,477 | $174.9K | 0.00% | +223,208+113.7% | Added |
| Group One Trading, L.P. | 441,636 | $184.0K | 0.01% | +305,048+223.3% | Added |
| Two Sigma Investments, LP | 525,125 | $218.8K | 0.00% | −562,971−51.7% | Reduced |
| Morgan Stanley | 1,273,785 | $530.8K | 0.00% | −2,072,562−61.9% | Reduced |
| Balyasny Asset Management LLC | 1,280,275 | $533.5K | 0.00% | +1,280,275 | New |
| UBS Group AG | 1,558,931 | $650.1K | 0.00% | +588,264+60.6% | Added |
| Monaco Asset Management SAM | 1,585,214 | $660.6K | 0.20% | +639,299+67.6% | Added |
| UBS Asset Management Americas Inc | 1,763,666 | $735.4K | 0.00% | −143,109−7.5% | Reduced |
| Logos Global Management LP | 1,850,000 | $770.9K | 0.05% | +1,350,000+270.0% | Added |
| Tejara Capital Ltd | 2,159,681 | $899.9K | 0.37% | +252,837+13.3% | Added |
| Schonfeld Strategic Advisors LLC | 6,090,381 | $2.54M | 0.01% | +4,357,657+251.5% | Added |
| EcoR1 Capital, LLC | 7,856,466 | $3.27M | 0.15% | +7,856,466 | New |
| 683 Capital Management, LLC | 15,025,000 | $6.26M | 0.52% | +10,150,000+208.2% | Added |
| Rubric Capital Management LP | 15,307,347 | $6.38M | 0.08% | 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 |