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Disclosery

MREO MEREO BIOPHARMA GROUP PLC

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CMN (ADR), issuer CIK 1719714

61 managers (61 13F filers) reported a position in MREO shares at 2026-06-30, 56,614,766 shares in all. 14 filers opened a position and 17 filers sold out during the quarter.

Managers
61
13F filers
61
New
14
Added
13
Reduced
12
Sold out
17
Shares held by filers
56,614,766

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q2 2026

Filers in the available 13F reports with a share position at 2026-06-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Rubric Capital Management LP15,307,347$4.86M0.04%013F-HRTimeline
683 Capital Management, LLCin group 683 Capital Management, LLC11,777,856$3.74M0.34%-222,14413F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/8,195,281$2.6M<0.01%-613F-HRTimelineGroup
Defilade Capital Management, L.P.7,558,756$2.4M0.32%013F-HRTimeline
Newtyn Management, LLC3,000,000$953K0.12%-4,079,05613F-HRTimeline
Tejara Capital Ltd2,037,520$647K0.27%013F-HRTimeline
UBS Group AGin group UBS Group AG1,447,627$460K<0.01%-42,50113F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP1,319,241$419K<0.01%+1,131,40213F-HRTimelineGroup
EcoR1 Capital, LLC1,000,000$318K0.02%-12,368,85513F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC774,944$246K<0.01%+634,97113F-HRTimelineGroup
Ishara Investments LP768,750$244K0.18%new13F-HRTimeline
Wealthspire Advisors, LLC765,000$243K<0.01%-31,03613F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC444,158$141K<0.01%new13F-HRTimelineGroup
Rangeley Capital, LLC329,200$105K0.1%013F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…213,270$67.8K<0.01%+17,35013F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP179,884$57.6K<0.01%-507,10313F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd174,481$55.4K<0.01%+90,01213F-HRTimelineGroup
GROUP ONE TRADING LLC167,515$53.2K<0.01%-168,31213F-HRTimeline
STATE STREET CORPin group STATE STREET CORP134,772$42.8K<0.01%+1,39313F-HRTimelineGroup
NOMURA HOLDINGS INCin group NOMURA ASSET MANAGEMENT CO LTD104,361$33.2K<0.01%new13F-HRTimelineGroup
James J. Burns & Company, LLC95,400$30.3K<0.01%new13F-HRTimeline
Quarry LP93,750$29.8K<0.01%new13F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC85,180$27.1K<0.01%new13F-HRTimelineGroup
JMN Financial LLC76,748$24.4K0.02%new13F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.69,678$22.1K<0.01%-233,31313F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO58,531$19.4K<0.01%+36,68313F-HRTimelineGroup
Virtu Financial LLCin group Virtu Financial LLC61,285$19K<0.01%+24,82713F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC52,100$16.6K<0.01%+3,70013F-HRTimeline
Significant Wealth Partners LLC32,677$10.4K0.01%+7,04313F-HRTimeline
Clear Harbor Asset Management, LLC32,000$10.1K<0.01%-3,00013F-HRTimeline
RHUMBLINE ADVISERS26,784$8.51K<0.01%+7,21213F-HRTimeline
Centiva Capital, LP25,000$7.94K<0.01%013F-HRTimeline
Engineers Gate Manager LP23,953$7.61K<0.01%-113F-HRTimeline
SIMPLEX TRADING, LLC18,780$5.97K<0.01%new13F-HRTimeline
NFSG Corp18,750$5.96K<0.01%013F-HRTimeline
OneDigital Investment Advisors LLC18,300$5.81K<0.01%013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY16,731$5.32K<0.01%+30613F-HRTimelineGroup
IHT Wealth Management, LLC15,000$4.77K<0.01%013F-HRTimeline
TWO SIGMA SECURITIES, LLC12,900$4.1K<0.01%new13F-HRTimeline
J. Safra Sarasin Holding AGin group J. Safra Sarasin Holding AG12,841$4.08K<0.01%new13F-HRTimelineGroup
SG Americas Securities, LLC12,802$4K<0.01%new13F-HRTimeline
MML INVESTORS SERVICES, LLC12,200$3.88K<0.01%013F-HRTimeline
World Investment Advisors10,000$3.3K<0.01%013F-HRTimeline
Astoria Portfolio Advisors LLC.10,000$3.18K<0.01%013F-HRTimeline
GAMMA Investing LLC9,308$2.96K<0.01%-9,96613F-HRTimeline
Arax Advisory Partners5,819$1.85K<0.01%+1,81913F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…2,000$635<0.01%013F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.1,500$479<0.01%013F-HRTimelineGroup
Allworth Financial LP1,500$477<0.01%013F-HRTimeline
Markowski Investments1,500$477<0.01%13F-HRTimeline
New England Capital Financial Advisors …300$96<0.01%013F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN231$73<0.01%+113F-HRTimelineGroup
SBI Securities Co., Ltd.114$36<0.01%013F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…100$32<0.01%013F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC52$17<0.01%new13F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\13$4<0.01%013F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS3$1<0.01%013F-HRTimelineGroup
SIT INVESTMENT ASSOCIATES INCin group SIT INVESTMENT ASSOCIATES INC970$00%013F-HRTimelineGroupValue filed as zero, left out of ratios.
Axiom Investment Management LLC1$00%013F-HRTimelineValue filed as zero, left out of ratios.
Integrated Wealth Concepts LLC1$00%new13F-HRTimelineValue filed as zero, left out of ratios.
Caitong International Asset Management …1$00%new13F-HRTimelineValue filed as zero, left out of ratios.