MREO Institutional Ownership & Shareholders
MEREO BIOPHARMA GROUP PL-ADR (MREO) is currently held by 54 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $17.99M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Rubric Capital Management Lp is currently the largest disclosed institutional shareholder of MREO tracked by InsiderSet, reporting ownership valued at approximately $4.86M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $4.44M, representing an estimated loss of -8.72% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 93% of the total disclosed MREO value among the investors covered in this analysis. Major shareholders include Rubric Capital Management Lp, 683 Capital Management, Llc, Bank Of America Corp, and several other long-term asset managers with concentrated positions in MEREO BIOPHARMA GROUP PL-ADR (MREO).
This page ranks the largest institutional MREO shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
54
Total Reported Value
$17.99M
Largest Holder
Rubric Capital Management Lp
Largest Position
$4.86M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
95
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Rubric Capital Management Lp | 0.04% | 15,307,347 | $4,863,144 | $4,439,131 | -$424,013 | -8.72% | |
| 683 Capital Management, Llc | 0.34% | 11,777,856 | $3,741,825 | $3,415,578 | -$326,247 | -8.72% | |
| Bank Of America Corp | 0.00% | 8,195,281 | $2,597,904 | $2,376,631 | -$221,273 | -8.52% | |
| Defilade Capital Management, L.P. | 0.32% | 7,558,756 | $2,401,417 | $2,192,039 | -$209,378 | -8.72% | |
| Newtyn Management, Llc | 0.12% | 3,000,000 | $953,100 | $870,000 | -$83,100 | -8.72% | |
| Tejara Capital Ltd | 0.27% | 2,037,520 | $647,320 | $590,881 | -$56,439 | -8.72% | |
| Ubs Group Ag | 0.00% | 1,447,627 | $460,346 | $419,812 | -$40,534 | -8.81% | |
| Two Sigma Investments, Lp | 0.00% | 1,319,241 | $419,123 | $382,580 | -$36,543 | -8.72% | |
| Ecor1 Capital, Llc | 0.02% | 1,000,000 | $317,700 | $290,000 | -$27,700 | -8.72% | |
| Jane Street Group, Llc | 0.00% | 774,944 | $246,200 | $224,734 | -$21,466 | -8.72% | |
| Ishara Investments Lp | 0.18% | 768,750 | $244,232 | $222,937 | -$21,295 | -8.72% | |
| Wealthspire Advisors, Llc | 0.00% | 765,000 | $243,041 | $221,850 | -$21,191 | -8.72% | |
| Citadel Advisors Llc | 0.00% | 444,158 | $141,109 | $128,806 | -$12,303 | -8.72% | |
| Rangeley Capital, Llc | 0.10% | 329,200 | $104,587 | $95,468 | -$9,119 | -8.72% | |
| Susquehanna International Group, Llp | 0.00% | 213,270 | $67,756 | $61,848 | -$5,908 | -8.72% | |
| Marshall Wace, Llp | 0.00% | 179,884 | $57,563 | $52,166 | -$5,397 | -9.38% | |
| Xtx Topco Ltd | 0.00% | 174,481 | $55,433 | $50,599 | -$4,834 | -8.72% | |
| Group One Trading Llc | 0.00% | 167,515 | $53,220 | $48,579 | -$4,641 | -8.72% | |
| State Street Corp | 0.00% | 134,772 | $42,817 | $39,084 | -$3,733 | -8.72% | |
| James J. Burns & Company, Llc | 0.00% | 95,400 | $38,351 | $27,666 | -$10,685 | -27.86% | |
| Nomura Holdings Inc | 0.00% | 104,361 | $33,155 | $30,265 | -$2,890 | -8.72% | |
| Quarry Lp | 0.00% | 93,750 | $29,784 | $27,187 | -$2,597 | -8.72% | |
| Goldman Sachs Group Inc | 0.00% | 85,180 | $27,062 | $24,702 | -$2,360 | -8.72% | |
| Jmn Financial Llc | 0.02% | 76,748 | $24,383 | $22,257 | -$2,126 | -8.72% | |
| Blackrock, Inc. | 0.00% | 69,678 | $22,137 | $20,207 | -$1,930 | -8.72% | |
| Jpmorgan Chase & Co | 0.00% | 58,531 | $19,421 | $16,974 | -$2,447 | -12.60% | |
| Virtu Financial Llc | 0.00% | 61,285 | $19,000 | $17,773 | -$1,227 | -6.46% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 52,100 | $16,552 | $15,109 | -$1,443 | -8.72% |
| Significant Wealth Partners Llc | 0.01% | 32,677 | $10,382 | $9,476 | -$906 | -8.72% | |
| Clear Harbor Asset Management, Llc | 0.00% | 32,000 | $10,083 | $9,280 | -$803 | -7.96% | |
| Rhumbline Advisers | 0.00% | 26,784 | $8,511 | $7,767 | -$744 | -8.74% | |
| Centiva Capital, Lp | 0.00% | 25,000 | $7,943 | $7,250 | -$693 | -8.72% | |
| Engineers Gate Manager Lp | 0.00% | 23,953 | $7,610 | $6,946 | -$664 | -8.72% | |
| Nfsg Corp | 0.00% | 18,750 | $7,538 | $5,438 | -$2,101 | -27.87% | |
| Simplex Trading, Llc | 0.00% | 18,780 | $5,972 | $5,446 | -$526 | -8.80% | |
| Onedigital Investment Advisors Llc | 0.00% | 18,300 | $5,814 | $5,307 | -$507 | -8.72% | |
| Morgan Stanley | 0.00% | 16,731 | $5,317 | $4,852 | -$465 | -8.75% | |
| Iht Wealth Management, Llc | 0.00% | 15,000 | $4,766 | $4,350 | -$416 | -8.73% | |
| Stonex Group Inc. | 0.00% | 15,479 | $4,508 | $4,489 | -$19 | -0.42% | |
| Two Sigma Securities, Llc | 0.00% | 12,900 | $4,098 | $3,741 | -$357 | -8.71% | |
| Sg Americas Securities, Llc | 0.00% | 12,802 | $4,000 | $3,713 | -$287 | -7.19% | |
| Mml Investors Services, Llc | 0.00% | 12,200 | $3,876 | $3,538 | -$338 | -8.72% | |
| World Investment Advisors | 0.00% | 10,000 | $3,300 | $2,900 | -$400 | -12.12% | |
| Astoria Portfolio Advisors Llc. | 0.00% | 10,000 | $3,177 | $2,900 | -$277 | -8.72% | |
| Arax Advisory Partners | 0.00% | 5,819 | $1,849 | $1,688 | -$161 | -8.73% | |
| Gamma Investing Llc | 0.00% | 1,991 | $800 | $577 | -$223 | -27.83% | |
| Rockefeller Capital Management L.P. | 0.00% | 2,000 | $635 | $580 | -$55 | -8.66% | |
| Osaic Holdings, Inc. | 0.00% | 1,500 | $479 | $435 | -$44 | -9.19% | |
| Allworth Financial Lp | 0.00% | 1,500 | $477 | $435 | -$42 | -8.81% | |
| New England Capital Financial Advisors Llc | 0.00% | 300 | $121 | $87 | -$34 | -28.10% |
Frequently asked questions about MREO
Who are the largest institutional holders of MREO?
The largest institutional holders of MREO reported in the latest SEC Form 13F filings include Rubric Capital Management Lp, 683 Capital Management, Llc, Bank Of America Corp, Defilade Capital Management, L.P., and Newtyn Management, Llc. InsiderSet ranks institutional holders by their latest reported MREO position.
What is MREO institutional ownership?
This page tracks MREO positions reported by institutional investment managers through SEC Form 13F. MEREO BIOPHARMA GROUP PL-ADR (MREO) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own MREO?
InsiderSet currently tracks 54 institutional managers reporting MREO holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of MREO shareholders.
How much MREO stock do institutions own?
Institutional investment managers disclosed approximately $17.99M in MREO holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was MREO institutional ownership last updated?
The latest MREO institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional MREO holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its MREO position after the reporting date.
Are institutions buying or selling MREO?
Institutional buying and selling can be analyzed by comparing MREO positions across consecutive 13F reporting periods. InsiderSet's MREO Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View MREO ownership changes.
How has MREO institutional ownership changed over time?
InsiderSet tracks MREO institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.