13F

Stock

Mereo Biopharma Group Plc

MREO · held by 63 managers

Reported value

$24.8M

Holders

63

+14 new · −21 exited

Holders’ est. mark

−$3.6M

Price effect on 48 books still in the name

Largest holder

$5.05M

Rubric Capital Management LP

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
Rubric Capital Management LP15.3M$5.05M−$1.33MCut−$1.33M
EcoR1 Capital, LLC13.4M$4.41M−$681.2KAdded$1.14M
683 Capital Management, LLC12M$3.96M−$1.04MCut−$2.3M
BANK OF AMERICA CORP /DE/8.2M$2.7M−$2.19KAdded$2.69M
Defilade Capital Management, L.P.7.56M$2.49MNew
Newtyn Management, LLC7.08M$2.34M−$19.5KAdded$2.24M
MILLENNIUM MANAGEMENT LLC3.56M$1.17M−$7.25KAdded$1.14M
Tejara Capital Ltd2.04M$672.4K−$176.7KCut−$227.6K
UBS Group AG1.49M$491.7K−$129.6KCut−$158.3K
Wealthspire Advisors, LLC796K$262.7KNew
MARSHALL WACE, LLP687K$226.7KNew
GROUP ONE TRADING LLC335.8K$110.8K−$29.1KCut−$73.2K
Rangeley Capital, LLC329.2K$108.6K−$28.5KCut−$43K
BlackRock, Inc.303K$100K−$26.3KCut−$30.3K
Knott David M Jr300.3K$99.1K−$26KCut−$26K
SUSQUEHANNA INTERNATIONAL GROUP, LLP195.9K$64.7KNew
TWO SIGMA INVESTMENTS, LP187.8K$62K−$16.3KCut−$156.8K
ADAR1 Capital Management, LLC150K$49.5K−$13KCut−$13K
JANE STREET GROUP, LLC140K$46.2K−$12.1KCut−$102.2K
State Street133.4K$44K−$11.3KCut−$10.4K
Forefront Analytics, LLC127.8K$42.2K−$2.75KAdded$28.9K
Virtus Investment Advisers, LLC125.7K$41.5K−$10.6KCut−$9.62K
GEODE CAPITAL MANAGEMENT, LLC92.5K$30.5K−$8.02KCut−$8.02K
XTX Topco Ltd84.5K$27.9KNew
Caption Management, LLC64.1K$21.1K−$4.34KAdded$306
SmartHarvest Portfolios, LLC49.5K$16.3K−$1.76KAdded$7.88K
Renaissance Technologies48.4K$16K−$4.2KCut−$65K
StoneX Group Inc.36.9K$12.2KNew
Independent Advisor Alliance35.2K$11.6KNew
Clear Harbor Asset Management, LLC35K$11.6K−$3.03KCut−$3.04K
Significant Wealth Partners LLC25.6K$8.46K−$1.88KCut−$579
Centiva Capital, LP25K$8.25K−$2.17KCut−$2.17K
Engineers Gate Manager LP24K$7.91K−$2.08KCut−$12.8K
JPMORGAN CHASE & CO21.8K$6.9KNew
RHUMBLINE ADVISERS19.6K$6.45K−$1.67KCut−$1.52K
GAMMA Investing LLC19.3K$6.36K−$829Added$2.38K
Three Magnolias Financial Advisors, LLC19K$6.27K−$1.65KCut−$1.65K
Newbridge Financial Services Group, Inc.18.8K$6.19K−$1.47KCut−$896
OneDigital Investment Advisors LLC18.3K$6.04K−$1.59KCut−$1.59K
MORGAN STANLEY16.4K$5.42K−$1.42KCut−$525.4K
IHT Wealth Management, LLC15K$4.95KNew
MML INVESTORS SERVICES, LLC12.2K$4.03K−$1.06KCut−$1.06K
World Investment Advisors10K$3.3KNew
Astoria Portfolio Advisors LLC.10K$2.8K−$1.22KCut−$1.22K
Baader Bank Aktiengesellschaft12.3K$2.67K−$496Cut−$30.4K
Arax Advisory Partners4K$1.32K−$347Cut−$347
BARCLAYS PLC2.5K$824−$216Cut−$5.22K
Rockefeller Capital Management L.P.2K$660−$173Cut−$173
OSAIC HOLDINGS, INC.1.5K$495−$43Added$287
Allworth Financial LP1.5K$495−$131Cut−$177
MAI Capital Management309$102−$27Cut−$27
New England Capital Financial Advisors LLC300$99−$27Cut−$27
WELLS FARGO & COMPANY/MN230$76−$20Cut−$648
ACADIAN ASSET MANAGEMENT LLC209.1K$68−$4Added$44
SBI Securities Co., Ltd.114$38New
EverSource Wealth Advisors, LLC100$33−$9Cut−$141
Sound Income Strategies, LLC66$22New
NATIONAL BANK OF CANADA /FI/46$15New
Virtu Financial LLC36.5K$12New
US BANCORP \DE\13$4−$1Cut−$1
BNP PARIBAS FINANCIAL MARKETS3$1$0Held
Axiom Investment Management LLC1$0Held
SIT INVESTMENT ASSOCIATES INC970$0$0Held

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.