13F Insight
DOSSIER · 13F Holders · Q4 2025
MREO

MEREO BIOPHARMA GROUP PLC

67 institutions still hold MEREO BIOPHARMA GROUP PLC as of Q4 2025. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 589492107·67 13F holders·last filed Dec 31, 2025
Market cap
—
13F value held
$29M
visible holders
Holders
67
filers reporting
Concentration
22.34%
Rubric Capital Management LP #1
top holder share
AI Holders Summary · Q4 2025

67 institutions reported MREO in Q4 2025. Rubric Capital Management LP leads at 22.3% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
Rubric Capital Management LP
CIK 0001687509
$6M15.3M0.08%Q4 202502
683 Capital Management, LLC
CIK 0001404574
$6M15.0M0.27%Q4 202503
EcoR1 Capital, LLC
CIK 0001587114
$4M13.4M0.19%Q1 202604
BANK OF AMERICA CORP /DE/
CIK 0000070858
$3M8.2M0.00%Q1 202605
Defilade Capital Management, L.P.
CIK 0002088557
$2M7.6M0.35%Q1 202606
Newtyn Management, LLC
CIK 0001569241
$2M7.1M0.25%Q1 202607
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$1M3.6M0.00%Q1 202608
Tejara Capital Ltd
CIK 0001879713
$672K2.0M0.22%Q1 202609
UBS Group AG
CIK 0001610520
$492K1.5M0.00%Q1 202610
CITADEL ADVISORS LLC
CIK 0001423053
$312K749K0.00%Q4 202511
Wealthspire Advisors, LLC
CIK 0001646247
$263K796K0.00%Q1 202612
LUMINUS MANAGEMENT LLC
CIK 0001279151
$165K395K0.14%Q4 202513
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$146K444K0.00%Q1 202614
Quadrature Capital Ltd
CIK 0001651424
$111K267K0.00%Q4 202515
GROUP ONE TRADING LLC
CIK 0000932540
$111K336K0.00%Q1 202616
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$110K334K0.00%Q1 202617
Rangeley Capital, LLC
CIK 0001517796
$109K329K0.11%Q1 202618
TWO SIGMA ADVISERS, LP
CIK 0001478735
$105K252K0.00%Q4 202519
BlackRock, Inc.
CIK 0002012383
$100K303K0.00%Q1 202620
Knott David M Jr
CIK 0001892770
$99K300K0.06%Q1 2026
Page 1 of 4
47 more holders available. Log in →
Insiders at MEREO BIOPHARMA GROUP PLC
Ekblom Anders →Shames Daniel →Bender Jeremy →Jacquet Pierre →Yoskowitz Marc J →Pakianathan Deepika →Wyzga Michael S →Jenkins Annalisa →