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Disclosery

MREO MEREO BIOPHARMA GROUP PLC

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CMN (ADR), issuer CIK 1719714

68 managers (70 13F filers) reported a position in MREO shares at 2025-12-31, 62,030,828 shares in all. 21 filers opened a position and 35 filers sold out during the quarter.

Managers
68
13F filers
70
New
21
Added
15
Reduced
20
Sold out
35
Shares held by filers
62,030,828

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, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, 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$6.38M0.08%013F-HRTimeline
683 Capital Management, LLCin group 683 Capital Management, LLC15,025,000$6.26M0.52%+10,150,00013F-HRTimelineGroup
EcoR1 Capital, LLC7,856,466$3.27M0.15%new13F-HRTimeline
Schonfeld Strategic Advisors LLC6,090,381$2.54M0.01%+4,357,65713F-HRTimeline
UBS Group AGgroup of 2 filers holding3,322,597$1.39M+445,155Timeline
Tejara Capital Ltd2,159,681$900K0.37%+252,83713F-HRTimeline
Logos Global Management LP1,850,000$771K0.05%+1,350,00013F-HRTimeline
Monaco Asset Management SAM1,585,214$661K0.2%+639,29913F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management1,280,275$533K<0.01%new13F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY1,273,785$531K<0.01%-2,072,56213F-HR/ATimelineGroup
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding777,025$324K-553,271Timeline
GROUP ONE TRADING LLC441,636$184K0.01%+305,04813F-HRTimeline
SIMPLEX TRADING, LLC419,477$175K<0.01%+223,20813F-HRTimeline
EntryPoint Capital, LLC400,700$167K0.07%new13F-HRTimeline
LUMINUS MANAGEMENT LLC395,000$165K0.15%new13F-HRTimeline
Rangeley Capital, LLC364,000$152K0.13%new13F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC356,004$148K<0.01%-96,35813F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.312,613$130K<0.01%-131,39113F-HRTimelineGroup
Knott David M Jr300,337$125K0.06%013F-HRTimeline
Quadrature Capital Ltdin group Quadrature Capital Ltd266,731$111K<0.01%new13F-HRTimelineGroup
SPHERA FUNDS MANAGEMENT LTD.in group SPHERA FUNDS MANAGEMENT LTD.255,400$106K0.02%new13F-HRTimelineGroup
Newtyn Management, LLC224,622$93.6K0.01%new13F-HRTimeline
CITIGROUP INCin group CITIGROUP INC195,814$81.6K<0.01%new13F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC194,371$81K<0.01%-396,50013F-HRTimeline
ADAR1 Capital Management, LLCin group ADAR1 Capital Management, LLC150,000$62.5K<0.01%new13F-HR/ATimelineGroup
STATE STREET CORPin group STATE STREET CORP130,643$54.4K<0.01%-2,05813F-HRTimelineGroup
Virtus Investment Advisers, LLCin group Virtus Investment Advisers, L…122,595$51.1K0.01%+81,66513F-HRTimelineGroup
Graham Capital Management, L.P.116,286$48.5K<0.01%new13F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC92,534$38.6K<0.01%013F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC83,646$34.9K<0.01%-253,85713F-HRTimelineGroup
Baader Bank Aktiengesellschaft128,742$33.1K<0.01%new13F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC61,435$24K<0.01%-194,94313F-HRTimelineGroup
Caption Management, LLC50,000$20.8K<0.01%-139,91413F-HRTimeline
Engineers Gate Manager LP49,798$20.8K<0.01%new13F-HRTimeline
Clear Harbor Asset Management, LLC35,000$14.6K<0.01%-42,00013F-HRTimeline
Forefront Analytics, LLC31,768$13.2K0.01%-1,41213F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC28,026$11.7K<0.01%-2,335,99813F-HR/ATimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/25,492$10.6K<0.01%-413,13013F-HRTimelineGroup
Centiva Capital, LP25,000$10.4K<0.01%013F-HRTimeline
Significant Wealth Partners LLC21,689$9.04K0.01%-26,12513F-HRTimeline
Aquatic Capital Management LLC21,216$8.84K<0.01%-32,49613F-HRTimeline
SmartHarvest Portfolios, LLC20,290$8.46K<0.01%13F-HRTimeline
RHUMBLINE ADVISERS19,146$7.98K<0.01%+10,02413F-HRTimeline
Three Magnolias Financial Advisors, LLC19,000$7.92K<0.01%-18,00013F-HRTimeline
OneDigital Investment Advisors LLC18,300$7.63K<0.01%013F-HRTimeline
NFSG Corp17,000$7.08K<0.01%+4,00013F-HRTimeline
PFG Investments, LLC16,650$6.94K<0.01%-50013F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC14,500$6.04K<0.01%new13F-HRTimelineGroup
QRG CAPITAL MANAGEMENT, INC.13,503$5.63K<0.01%new13F-HRTimeline
AE Wealth Management LLC12,563$5.24K<0.01%new13F-HRTimeline
MML INVESTORS SERVICES, LLC12,200$5.08K<0.01%new13F-HRTimeline
Astoria Portfolio Advisors LLC.10,000$4.03K<0.01%new13F-HRTimeline
GAMMA Investing LLC9,561$3.98K<0.01%+38013F-HRTimeline
TORONTO DOMINION BANKin group TORONTO DOMINION BANK5,500$2.29K<0.01%new13F-HRTimelineGroup
Arax Advisory Partners4,000$1.67K<0.01%013F-HRTimeline
Caitong International Asset Management …2,231$930<0.01%-6,24513F-HR/ATimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…2,000$833<0.01%013F-HR/ATimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN1,737$724<0.01%+1,50713F-HRTimelineGroup
Allworth Financial LP1,611$672<0.01%+3813F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.500$208<0.01%-5,17713F-HRTimelineGroup
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…417$174<0.01%013F-HRTimelineGroup
MAI Capital Management309$129<0.01%013F-HRTimeline
New England Capital Financial Advisors …300$126<0.01%013F-HRTimeline
SageView Advisory Group, LLC161$68<0.01%new13F-HRTimeline
Farther Finance Advisors, LLC17$7<0.01%new13F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\13$5<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.