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

MEREO BIOPHARMA GROUP PLC

63 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 589492107·63 13F holders·last filed Dec 31, 2025
Market cap
—
13F value held
$20M
visible holders
Holders
63
filers reporting
Concentration
30.66%
683 Capital Management, LLC #1
top holder share
AI Holders Summary · Q4 2025

63 institutions reported MREO in Q4 2025. 683 Capital Management, LLC leads at 30.7% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
683 Capital Management, LLC
CIK 0001404574
$6M15.0M0.27%Q4 202502
Rubric Capital Management LP
CIK 0001687509
$5M15.3M0.04%Q2 202603
BANK OF AMERICA CORP /DE/
CIK 0000070858
$3M8.2M0.00%Q2 202604
Defilade Capital Management, L.P.
CIK 0002088557
$2M7.6M0.32%Q2 202605
Newtyn Management, LLC
CIK 0001569241
$953K3.0M0.12%Q2 202606
Tejara Capital Ltd
CIK 0001879713
$647K2.0M0.27%Q2 202607
UBS Group AG
CIK 0001610520
$460K1.4M0.00%Q2 202608
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$419K1.3M0.00%Q2 202609
CITADEL ADVISORS LLC
CIK 0001423053
$318K1.0M0.00%Q2 202610
EcoR1 Capital, LLC
CIK 0001587114
$318K1.0M0.02%Q2 202611
Ishara Investments LP
CIK 0002111609
$244K769K0.18%Q2 202612
Wealthspire Advisors, LLC
CIK 0001646247
$243K765K0.00%Q2 202613
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$138K433K0.00%Q2 202614
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$110K334K0.00%Q1 202615
Rangeley Capital, LLC
CIK 0001517796
$109K329K0.11%Q1 202616
TWO SIGMA ADVISERS, LP
CIK 0001478735
$105K252K0.00%Q4 202517
ACADIAN ASSET MANAGEMENT LLC
CIK 0000916542
$68K209K0.00%Q1 202618
MARSHALL WACE, LLP
CIK 0001318757
$58K180K0.00%Q2 202619
XTX Topco Ltd
CIK 0001828301
$55K174K0.00%Q2 202620
GROUP ONE TRADING LLC
CIK 0000932540
$53K168K0.00%Q2 2026
Page 1 of 4
43 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 →