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, Q2 2026
Institutional positions in Mereo BioPharma Group plc as of Jun 30, 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
- 60
- −3 vs. Q1 2026
- Shares held
- 56.6M
- −18.8M (−24.9%) vs. Q1 2026
- Total value
- $18.0M
- −$6.89M (−27.7%) vs. Q1 2026
- New holders
- 14
- 13 more added
- Sold out
- 17
- 12 more reduced
Compare with Q1 2026: 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, Q2 2026
Shares, value and share of portfolio for each institution holding Mereo BioPharma Group plc; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Sit Investment Associates Inc | 970 | $0 | 0.00% | 00.0% | Unchanged |
| Axiom Investment Management LLC | 1 | $0 | 0.00% | 00.0% | Unchanged |
| Caitong International Asset Management Co., Ltd | 1 | $0 | 0.00% | +1 | New |
| BNP Paribas Arbitrage, SA | 3 | $1 | 0.00% | 00.0% | Unchanged |
| US Bancorp | 13 | $4 | 0.00% | 00.0% | Unchanged |
| Citigroup Inc | 52 | $17 | 0.00% | +52 | New |
| EverSource Wealth Advisors, LLC | 100 | $32 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 114 | $36 | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 231 | $73 | 0.00% | +1+0.4% | Added |
| New England Capital Financial Advisors LLC | 300 | $96 | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 1,500 | $477 | 0.00% | 00.0% | Unchanged |
| Markowski Investments | 1,500 | $477 | 0.00% | +1,500 | New |
| Advisor Group Holdings, Inc. | 1,500 | $479 | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 2,000 | $635 | 0.00% | 00.0% | Unchanged |
| SRS Capital Advisors, Inc. | 5,819 | $1.85K | 0.00% | +1,819+45.5% | Added |
| GAMMA Investing LLC | 9,308 | $2.96K | 0.00% | −9,966−51.7% | Reduced |
| Astoria Portfolio Advisors LLC. | 10,000 | $3.18K | 0.00% | 00.0% | Unchanged |
| Pensionmark Financial Group, LLC | 10,000 | $3.30K | 0.00% | 00.0% | Unchanged |
| MML Investors Services, LLC | 12,200 | $3.88K | 0.00% | 00.0% | Unchanged |
| SG Americas Securities, LLC | 12,802 | $4.00K | 0.00% | +12,802 | New |
| J. Safra Sarasin Holding AG | 12,841 | $4.08K | 0.00% | +12,841 | New |
| Two Sigma Securities, LLC | 12,900 | $4.10K | 0.00% | +12,900 | New |
| IHT Wealth Management, LLC | 15,000 | $4.77K | 0.00% | 00.0% | Unchanged |
| Morgan Stanley | 16,731 | $5.32K | 0.00% | +306+1.9% | Added |
| Resources Investment Advisors, LLC. | 18,300 | $5.81K | 0.00% | 00.0% | Unchanged |
| Newbridge Financial Services Group, Inc. | 18,750 | $5.96K | 0.00% | 00.0% | Unchanged |
| Simplex Trading, LLC | 18,780 | $5.97K | 0.00% | +18,780 | New |
| Engineers Gate Manager LP | 23,953 | $7.61K | 0.00% | −10.0% | Reduced |
| Centiva Capital, LP | 25,000 | $7.94K | 0.00% | 00.0% | Unchanged |
| Rhumbline Advisers | 26,784 | $8.51K | 0.00% | +7,212+36.8% | Added |
| Clear Harbor Asset Management, LLC | 32,000 | $10.1K | 0.00% | −3,000−8.6% | Reduced |
| Significant Wealth Partners LLC | 32,677 | $10.4K | 0.01% | +7,043+27.5% | Added |
| Renaissance Technologies LLC | 52,100 | $16.6K | 0.00% | +3,700+7.6% | Added |
| Virtu Financial LLC | 61,285 | $19.0K | 0.00% | +24,827+68.1% | Added |
| JPMorgan Chase & Co | 58,531 | $19.4K | 0.00% | +36,683+167.9% | Added |
| BlackRock, Inc. | 69,678 | $22.1K | 0.00% | −233,313−77.0% | Reduced |
| JMN Financial LLC | 76,748 | $24.4K | 0.02% | +76,748 | New |
| Goldman Sachs Group Inc | 85,180 | $27.1K | 0.00% | +85,180 | New |
| Quarry LP | 93,750 | $29.8K | 0.00% | +93,750 | New |
| James J. Burns & Company, LLC | 95,400 | $30.3K | 0.00% | +95,400 | New |
| Nomura Holdings Inc | 104,361 | $33.2K | 0.00% | +104,361 | New |
| State Street Corp | 134,772 | $42.8K | 0.00% | +1,393+1.0% | Added |
| Group One Trading, L.P. | 167,515 | $53.2K | 0.00% | −168,312−50.1% | Reduced |
| XTX Topco Ltd | 174,481 | $55.4K | 0.00% | +90,012+106.6% | Added |
| Marshall Wace, LLP | 179,884 | $57.6K | 0.00% | −507,103−73.8% | Reduced |
| Susquehanna International Group, LLP | 213,270 | $67.8K | 0.00% | +17,350+8.9% | Added |
| Rangeley Capital, LLC | 329,200 | $104.6K | 0.10% | 00.0% | Unchanged |
| Citadel Advisors LLC | 444,158 | $141.1K | 0.00% | +444,158 | New |
| Wealthspire Advisors, LLC | 765,000 | $243.0K | 0.00% | −31,036−3.9% | Reduced |
| Ishara Investments LP | 768,750 | $244.2K | 0.18% | +768,750 | New |
| Jane Street Group, LLC | 774,944 | $246.2K | 0.00% | +634,971+453.6% | Added |
| EcoR1 Capital, LLC | 1,000,000 | $317.7K | 0.02% | −12,368,855−92.5% | Reduced |
| Two Sigma Investments, LP | 1,319,241 | $419.1K | 0.00% | +1,131,402+602.3% | Added |
| UBS Group AG | 1,447,627 | $460.3K | 0.00% | −42,501−2.9% | Reduced |
| Tejara Capital Ltd | 2,037,520 | $647.3K | 0.27% | 00.0% | Unchanged |
| Newtyn Management, LLC | 3,000,000 | $953.1K | 0.12% | −4,079,056−57.6% | Reduced |
| Defilade Capital Management, L.P. | 7,558,756 | $2.40M | 0.32% | 00.0% | Unchanged |
| Bank of America Corp | 8,195,281 | $2.60M | 0.00% | −60.0% | Reduced |
| 683 Capital Management, LLC | 11,777,856 | $3.74M | 0.34% | −222,144−1.9% | Reduced |
| Rubric Capital Management LP | 15,307,347 | $4.86M | 0.04% | 00.0% | Unchanged |
| Millennium Management LLC | 0 | $0 | 0.00% | −3,559,103−100.0% | Sold out |
| Knott David M Jr | 0 | $0 | 0.00% | −300,337−100.0% | Sold out |
| Acadian Asset Management LLC | 0 | $0 | 0.00% | −209,084−100.0% | Sold out |
| ADAR1 Capital Management, LLC | 0 | $0 | 0.00% | −150,000−100.0% | Sold out |
| Forefront Analytics, LLC | 0 | $0 | 0.00% | −127,778−100.0% | Sold out |
| Virtus Investment Advisers, Inc. | 0 | $0 | 0.00% | −125,662−100.0% | Sold out |
| Geode Capital Management, LLC | 0 | $0 | 0.00% | −92,534−100.0% | Sold out |
| Caption Management, LLC | 0 | $0 | 0.00% | −64,064−100.0% | Sold out |
| SmartHarvest Portfolios, LLC | 0 | $0 | 0.00% | −49,512−100.0% | Sold out |
| StoneX Group Inc. | 0 | $0 | 0.00% | −36,873−100.0% | Sold out |
| Independent Advisor Alliance | 0 | $0 | 0.00% | −35,227−100.0% | Sold out |
| Blue Rock Wealth Management LLC | 0 | $0 | 0.00% | −19,000−100.0% | Sold out |
| Baader Bank INC | 0 | $0 | 0.00% | −12,330−100.0% | Sold out |
| Barclays PLC | 0 | $0 | 0.00% | −2,496−100.0% | Sold out |
| MAI Capital Management | 0 | $0 | 0.00% | −309−100.0% | Sold out |
| Sound Income Strategies, LLC | 0 | $0 | 0.00% | −66−100.0% | Sold out |
| National Bank of Canada | 0 | $0 | 0.00% | −46−100.0% | Sold out |