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, Q1 2026
Institutional positions in Mereo BioPharma Group plc as of Mar 31, 2026. 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
- 63
- −7 vs. Q4 2025
- Shares held
- 75.4M
- +13.3M (+21.5%) vs. Q4 2025
- Total value
- $24.9M
- −$954.6K (−3.7%) vs. Q4 2025
- New holders
- 15
- 15 more added
- Sold out
- 22
- 16 more reduced
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Mereo BioPharma Group plc; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Rubric Capital Management LP | 15,307,347 | $5.05M | 0.06% | 00.0% | Unchanged |
| EcoR1 Capital, LLC | 13,368,855 | $4.41M | 0.19% | +5,512,389+70.2% | Added |
| 683 Capital Management, LLC | 12,000,000 | $3.96M | 0.37% | −3,025,000−20.1% | Reduced |
| Bank of America Corp | 8,195,287 | $2.70M | 0.00% | +8,169,795+32,048.5% | Added |
| Defilade Capital Management, L.P. | 7,558,756 | $2.49M | 0.35% | +7,558,756 | New |
| Newtyn Management, LLC | 7,079,056 | $2.34M | 0.25% | +6,854,434+3,051.5% | Added |
| Millennium Management LLC | 3,559,103 | $1.17M | 0.00% | +3,475,457+4,155.0% | Added |
| Tejara Capital Ltd | 2,037,520 | $672.4K | 0.22% | −122,161−5.7% | Reduced |
| UBS Group AG | 1,490,128 | $491.7K | 0.00% | −68,803−4.4% | Reduced |
| Wealthspire Advisors, LLC | 796,036 | $262.7K | 0.00% | +796,036 | New |
| Marshall Wace, LLP | 686,987 | $226.7K | 0.00% | +686,987 | New |
| Group One Trading, L.P. | 335,827 | $110.8K | 0.00% | −105,809−24.0% | Reduced |
| Rangeley Capital, LLC | 329,200 | $108.6K | 0.12% | −34,800−9.6% | Reduced |
| BlackRock, Inc. | 302,991 | $100.0K | 0.00% | −9,622−3.1% | Reduced |
| Knott David M Jr | 300,337 | $99.1K | 0.06% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 209,084 | $68.0K | 0.00% | +147,649+240.3% | Added |
| Susquehanna International Group, LLP | 195,920 | $64.7K | 0.00% | +195,920 | New |
| Two Sigma Investments, LP | 187,839 | $62.0K | 0.00% | −337,286−64.2% | Reduced |
| ADAR1 Capital Management, LLC | 150,000 | $49.5K | 0.00% | 00.0% | Unchanged |
| Jane Street Group, LLC | 139,973 | $46.2K | 0.00% | −216,031−60.7% | Reduced |
| State Street Corp | 133,379 | $44.0K | 0.00% | +2,736+2.1% | Added |
| Forefront Analytics, LLC | 127,778 | $42.2K | 0.04% | +96,010+302.2% | Added |
| Virtus Investment Advisers, Inc. | 125,662 | $41.5K | 0.01% | +3,067+2.5% | Added |
| Geode Capital Management, LLC | 92,534 | $30.5K | 0.00% | 00.0% | Unchanged |
| XTX Topco Ltd | 84,469 | $27.9K | 0.00% | +84,469 | New |
| Caption Management, LLC | 64,064 | $21.1K | 0.00% | +14,064+28.1% | Added |
| SmartHarvest Portfolios, LLC | 49,512 | $16.3K | 0.01% | +29,222+144.0% | Added |
| Renaissance Technologies LLC | 48,400 | $16.0K | 0.00% | −145,971−75.1% | Reduced |
| StoneX Group Inc. | 36,873 | $12.2K | 0.00% | +36,873 | New |
| Virtu Financial LLC | 36,458 | $12.0K | 0.00% | +36,458 | New |
| Independent Advisor Alliance | 35,227 | $11.6K | 0.00% | +35,227 | New |
| Clear Harbor Asset Management, LLC | 35,000 | $11.6K | 0.00% | 00.0% | Unchanged |
| Significant Wealth Partners LLC | 25,634 | $8.46K | 0.01% | +3,945+18.2% | Added |
| Centiva Capital, LP | 25,000 | $8.25K | 0.00% | 00.0% | Unchanged |
| Engineers Gate Manager LP | 23,954 | $7.91K | 0.00% | −25,844−51.9% | Reduced |
| JPMorgan Chase & Co | 21,848 | $6.90K | 0.00% | +21,848 | New |
| Rhumbline Advisers | 19,572 | $6.45K | 0.00% | +426+2.2% | Added |
| GAMMA Investing LLC | 19,274 | $6.36K | 0.00% | +9,713+101.6% | Added |
| Blue Rock Wealth Management LLC | 19,000 | $6.27K | 0.00% | 00.0% | Unchanged |
| Newbridge Financial Services Group, Inc. | 18,750 | $6.19K | 0.00% | +1,750+10.3% | Added |
| Resources Investment Advisors, LLC. | 18,300 | $6.04K | 0.00% | 00.0% | Unchanged |
| Morgan Stanley | 16,425 | $5.42K | 0.00% | −1,257,360−98.7% | Reduced |
| IHT Wealth Management, LLC | 15,000 | $4.95K | 0.00% | +15,000 | New |
| MML Investors Services, LLC | 12,200 | $4.03K | 0.00% | 00.0% | Unchanged |
| Pensionmark Financial Group, LLC | 10,000 | $3.30K | 0.00% | +10,000 | New |
| Astoria Portfolio Advisors LLC. | 10,000 | $2.80K | 0.00% | 00.0% | Unchanged |
| Baader Bank INC | 12,330 | $2.67K | 0.00% | −116,412−90.4% | Reduced |
| SRS Capital Advisors, Inc. | 4,000 | $1.32K | 0.00% | 00.0% | Unchanged |
| Barclays PLC | 2,496 | $824 | 0.00% | −12,004−82.8% | Reduced |
| Rockefeller Capital Management L.P. | 2,000 | $660 | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 1,500 | $495 | 0.00% | −111−6.9% | Reduced |
| Advisor Group Holdings, Inc. | 1,500 | $495 | 0.00% | +1,000+200.0% | Added |
| MAI Capital Management | 309 | $102 | 0.00% | 00.0% | Unchanged |
| New England Capital Financial Advisors LLC | 300 | $99 | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 230 | $76 | 0.00% | −1,507−86.8% | Reduced |
| SBI Securities Co., Ltd. | 114 | $38 | 0.00% | +114 | New |
| EverSource Wealth Advisors, LLC | 100 | $33 | 0.00% | −317−76.0% | Reduced |
| Sound Income Strategies, LLC | 66 | $22 | 0.00% | +66 | New |
| National Bank of Canada | 46 | $15 | 0.00% | +46 | New |
| US Bancorp | 13 | $4 | 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 |
| Axiom Investment Management LLC | 1 | $0 | 0.00% | +1 | New |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −6,090,381−100.0% | Sold out |
| Logos Global Management LP | 0 | $0 | 0.00% | −1,850,000−100.0% | Sold out |
| UBS Asset Management Americas Inc | 0 | $0 | 0.00% | −1,763,666−100.0% | Sold out |
| Monaco Asset Management SAM | 0 | $0 | 0.00% | −1,585,214−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −1,280,275−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −419,477−100.0% | Sold out |
| EntryPoint Capital, LLC | 0 | $0 | 0.00% | −400,700−100.0% | Sold out |
| Luminus Management LLC | 0 | $0 | 0.00% | −395,000−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −266,731−100.0% | Sold out |
| Sphera Funds Management Ltd. | 0 | $0 | 0.00% | −255,400−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −251,900−100.0% | Sold out |
| Citigroup Inc | 0 | $0 | 0.00% | −195,814−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −116,286−100.0% | Sold out |
| Goldman Sachs Group Inc | 0 | $0 | 0.00% | −28,026−100.0% | Sold out |
| Aquatic Capital Management LLC | 0 | $0 | 0.00% | −21,216−100.0% | Sold out |
| PFG Investments, LLC | 0 | $0 | 0.00% | −16,650−100.0% | Sold out |
| QRG Capital Management, Inc. | 0 | $0 | 0.00% | −13,503−100.0% | Sold out |
| AE Wealth Management LLC | 0 | $0 | 0.00% | −12,563−100.0% | Sold out |
| Toronto Dominion Bank | 0 | $0 | 0.00% | −5,500−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −2,231−100.0% | Sold out |
| SageView Advisory Group, LLC | 0 | $0 | 0.00% | −161−100.0% | Sold out |
| Farther Finance Advisors, LLC | 0 | $0 | 0.00% | −17−100.0% | Sold out |