Mereo Biopharma Group PL-ADRMREO
13F holders, Q1 2025 (March 31)90holders −1
13new positions
14sold out
4famous investors
$2.25avg. 13F price*
At the end of Q1 2025, 90 institutions reported holding Mereo Biopharma Group PL-ADR (MREO) in their 13F filings, down 1 from Q4 2024. 13 opened new positions and 14 sold out. The largest holders were Janus Henderson Group PLC ($52.4M), Rubric Capital Management LP ($34.4M) and Mangrove Partners Im, LLC ($19.4M). 4 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Mereo Biopharma Group PL-ADR
- CUSIP
- 589492107
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2024 → Q1 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 13 | $7.9M |
| Exits | 14 | $7.3M |
All 13F filers, Q4 2024 → Q1 2025: 15,924,982 shares bought and 20,028,479 shares sold, net −4,103,497 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 90 holders
| Janus Henderson Group PLC | 0.03% | Add +32.8% | 22,735,121 | $52.4M |
| Rubric Capital Management LP | 0.62% | No change | 15,307,347 | $34.4M |
| Mangrove Partners Im, LLC | 2.24% | No change | 8,636,485 | $19.4M |
| Frazier Life Sciences Management, L.P. | 0.81% | Add +53.4% | 7,819,863 | $17.6M |
| Deerfield Management Company, L.P. | 0.34% | No change | 6,710,429 | $15.1M |
| Rock Springs Capital Management LP | 0.86% | Reduce -30.4% | 6,684,247 | $15.0M |
| Alkeon Capital Management LLC | 0.06% | No change | 4,698,100 | $10.6M |
| 683 Capital Management, LLC | 1.16% | Add +1.9% | 4,635,000 | $10.4M |
| Clearline Capital LP | 0.73% | No change | 3,217,894 | $7.2M |
| Tejara Capital Ltd | 2.80% | Add +8.8% | 2,521,324 | $5.7M |
| Aberdeen Group plc | 0.01% | New | 2,188,354 | $4.9M |
| Morgan Stanley | 0.00% | Reduce -38.7% | 2,179,642 | $4.9M |
| Goldman Sachs Group Inc. | 0.00% | Add +0.3% | 2,125,920 | $4.8M |
| Adage Capital Partners Gp, L.L.C. | 0.01% | Reduce -80.5% | 1,700,756 | $3.8M |
| Schonfeld Strategic Advisors LLC | 0.02% | Add +222.1% | 1,591,056 | $3.6M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +62.6% | 1,569,100 | $3.5M |
| Renaissance Technologies | 0.00% | Add +13.5% | 1,350,471 | $3.0M |
| Great Point Partners LLC | 1.56% | Add +10.9% | 1,275,000 | $2.9M |
| Woodline Partners LP | 0.01% | Add +53.2% | 947,986 | $2.1M |
| UBS Group AG | 0.00% | Reduce -64.8% | 932,021 | $2.1M |
| Perceptive Advisors LLC | 0.07% | Reduce -19.2% | 876,961 | $2.0M |
| Integral Health Asset Management, LLC | 0.20% | Reduce -20.0% | 800,000 | $1.8M |
| Acuta Capital Partners, LLC | 2.07% | Add +1.6% | 791,815 | $1.8M |
| Marshall Wace, LLP | 0.00% | Reduce -11.4% | 767,744 | $1.7M |
| FMR LLC | 0.00% | New | 759,100 | $1.7M |
| Soleus Capital Management, L.P. | 0.12% | Reduce -12.7% | 686,953 | $1.5M |
| Tema ETFs LLC | 0.44% | Reduce -26.5% | 654,666 | $1.5M |
| NEOS Investment Management LLC | 0.03% | Reduce -20.6% | 654,666 | $1.5M |
| Hudson Bay Capital Management LP | 0.01% | Add +42.9% | 450,000 | $1.0M |
| Bank of America Corp. | 0.00% | Add +18808.2% | 438,670 | $987K |
| Artia Global Partners LP | 0.28% | No change | 421,359 | $948K |
| Monaco Asset Management SAM | 0.47% | Add +9.2% | 416,468 | $937K |
| Millennium Management | 0.00% | Reduce -90.0% | 394,431 | $887K |
| Atle Fund Management AB | 0.39% | No change | 390,000 | $878K |
| Cantor Fitzgerald, L. P. | 0.03% | Add +57.8% | 355,000 | $799K |
| Citadel Advisors | 0.00% | Add +9.5% | 343,653 | $773K |
| Knott David M Jr | 0.34% | Reduce -3.5% | 319,337 | $719K |
| BlackRock, Inc. | 0.00% | Add +0.5% | 274,361 | $617K |
| Knoll Capital Management, LLC | 0.38% | No change | 260,470 | $586K |
| Two Sigma Investments, LP | 0.00% | Add +256.7% | 245,206 | $552K |
| Susquehanna International Group, LLP | 0.00% | Reduce -55.5% | 174,378 | $392K |
| Jane Street Group, LLC | 0.00% | Add +20.4% | 144,803 | $326K |
| Persistent Asset Partners Ltd | 0.22% | New | 113,247 | $255K |
| Caption Management, LLC | 0.01% | New | 104,783 | $236K |
| BIT Capital GmbH | 0.03% | New | 101,070 | $227K |
| Geode Capital Management, LLC | 0.00% | No change | 92,156 | $207K |
| J. Goldman & Co LP | 0.01% | No change | 79,387 | $179K |
| Diadema Partners LP | 0.13% | New | 492,215 | $169K |
| Graham Capital Management, L.P. | 0.01% | Add +122.7% | 49,418 | $111K |
| Forefront Analytics, LLC | 0.12% | Add +37.0% | 47,630 | $107K |
| State Street Corp. | 0.00% | Reduce -3.0% | 45,659 | $103K |
| Virtus Investment Advisers, LLC | 0.03% | New | 44,007 | $99K |
| Clear Harbor Asset Management, LLC | 0.01% | No change | 42,000 | $95K |
| Ameriprise Financial Inc. | 0.00% | Reduce -58.7% | 39,030 | $88K |
| PFG Investments, LLC | 0.01% | Reduce -5.1% | 37,433 | $84K |
| Point72 Asset Management | 0.00% | New | 35,816 | $81K |
| Group One Trading LLC | 0.00% | New | 34,281 | $77K |
| Avanza Fonder AB | 0.00% | Add +43.5% | 28,121 | $67K |
| Two Sigma Advisers, LP | 0.00% | New | 29,300 | $66K |
| Centiva Capital, LP | 0.00% | No change | 25,000 | $56K |
| Quadrature Capital Ltd | 0.00% | New | 22,687 | $51K |
| Ascentis Independent Advisors | 0.01% | Reduce -11.9% | 19,900 | $45K |
| OneDigital Investment Advisors LLC | 0.00% | No change | 18,300 | $41K |
| Squarepoint Ops LLC | 0.00% | Reduce -24.2% | 17,931 | $40K |
| Sheets Smith Investment Management | 0.04% | No change | 16,890 | $38K |
| HRT Financial LP | 0.00% | New | 15,713 | $35K |
| Significant Wealth Partners LLC | 0.02% | Add +27.4% | 13,771 | $31K |
| HSBC Holdings PLC | 0.00% | No change | 13,577 | $30K |
| NFSG Corp | 0.01% | Add +2.8% | 11,000 | $25K |
| ADAR1 Capital Management, LLC | 0.00% | No change | 10,000 | $23K |
| Level Four Advisory Services, LLC | 0.00% | No change | 10,000 | $23K |
| Marex Group Ltd | 0.00% | No change | 10,000 | $23K |
| GAMMA Investing LLC | 0.00% | Reduce -6.9% | 8,380 | $19K |
| Rhumbline Advisers | 0.00% | Reduce -9.0% | 6,588 | $15K |
| Arax Advisory Partners | 0.00% | No change | 4,000 | $9K |
| Simplex Trading, LLC | 0.00% | Reduce -92.5% | 4,117 | $9K |
| Osaic Holdings, Inc. | 0.00% | Add +2274.4% | 3,063 | $7K |
| Allworth Financial LP | 0.00% | No change | 1,500 | $4K |
| GPS Wealth Strategies Group, LLC | 0.00% | No change | 1,500 | $3K |
| Caitong International Asset Management Co., Ltd | 0.00% | Add +363.8% | 1,484 | $3K |
| Wells Fargo & Company | 0.00% | Add +437.1% | 1,230 | $3K |
| Sit Investment Associates Inc. | 0.00% | No change | 970 | $2K |
| JPMorgan Chase & Co. | 0.00% | No change | 365 | $821 |
| MAI Capital Management | 0.00% | No change | 309 | $696 |
| New England Capital Financial Advisors LLC | 0.00% | No change | 300 | $675 |
| Transce3nd, LLC | 0.00% | No change | 127 | $286 |
| Principal Securities, Inc. | 0.00% | No change | 32 | $112 |
| US Bancorp \de | 0.00% | No change | 13 | $29 |
| Grove Bank & Trust | 0.00% | New | 12 | $27 |
| BNP Paribas Financial Markets | 0.00% | No change | 3 | $7 |
"% of holder's portfolio" is MREO's weight in each manager's 13F, not the share of Mereo Biopharma Group PL-ADR the manager owns.