Delisting risk
MREO · NASDAQ · Biotechnology

Mereo BioPharma Group (ADR) (MREO)

Advances acquired rare-disease drug candidates through clinical development and partnerships.

$0.2651
Pre-market−0.00 (−0.75%)
At close$0.2671(−3.47%)

Breakdown13F · 13D/G · Form 4

Institutions67 holders · as of Mar 31, 202647.20%75.38M ADS
Insiders5 holders · as of Sep 16, 20240.78%1.25M ADS
Strategic holders1 holder · as of Feb 11, 20221.18%1.88M ADS
Otherremainder50.84%81.18M ADS

159.69M ADS (1 ADS = 5 ordinary shares) as of Sep 3, 2026 · institutions as of Mar 31, 2026 · holders as of their latest filing

Top shareholders13F · 13D/G · Form 4

HolderStakeSharesEvidence
Rubric Capital Management LPInstitution
9.59%15.31M ADS13Fas of Mar 31, 2026
Ecor1 Capital, LLCInstitution
8.37%13.37M ADS13Fas of Mar 31, 2026
683 Capital Management, LLCInstitution
7.51%12.00M ADS13Fas of Mar 31, 2026
Bank of America Corp /DE/Institution
5.13%8.20M ADS13Fas of Mar 31, 2026
Defilade Capital Management, L.P.Institution
4.73%7.56M ADS13Fas of Mar 31, 2026
Newtyn Management, LLCInstitution
4.43%7.08M ADS13Fas of Mar 31, 2026
Millennium Management LLCInstitution
2.23%3.56M ADS13Fas of Mar 31, 2026
Tejara Capital LtdInstitution
1.28%2.04M ADS13Fas of Mar 31, 2026
Vivo Opportunity, LLCStrategic
1.18%1.88M13G/Afiled Feb 11, 2022
UBS Group AGInstitution
0.93%1.49M ADS13Fas of Mar 31, 2026
Denise Scots-KnightInsiderdirector, officer: Chief Executive Officer
0.51%808,921 ADSForm 4filed Sep 16, 2024
Wealthspire Advisors, LLCInstitution
0.50%796,036 ADS13Fas of Mar 31, 2026
Marshall Wace, LLPInstitution
0.43%686,987 ADS13Fas of Mar 31, 2026
Group One Trading, L.P.Institution
0.21%335,827 ADS13Fas of Mar 31, 2026
Rangeley Capital, LLCInstitution
0.21%329,200 ADS13Fas of Mar 31, 2026
BlackRock, Inc.Institution
0.19%302,991 ADS13Fas of Mar 31, 2026
Knott David M JrInstitution
0.19%300,337 ADS13Fas of Mar 31, 2026
Charles SermonInsiderofficer: General Counsel
0.14%219,061 ADSForm 4filed Sep 16, 2024
Acadian Asset Management LLCInstitution
0.13%209,084 ADS13Fas of Mar 31, 2026
Susquehanna International Group, LLPInstitution
0.12%195,920 ADS13Fas of Mar 31, 2026
Two Sigma Investments, LPInstitution
0.12%187,839 ADS13Fas of Mar 31, 2026
Adar1 Capital Management, LLCInstitution
0.09%150,000 ADS13Fas of Mar 31, 2026
Jane Street Group, LLCInstitution
0.09%139,973 ADS13Fas of Mar 31, 2026
State Street CorpInstitution
0.08%133,379 ADS13Fas of Mar 31, 2026
Forefront Analytics, LLCInstitution
0.08%127,778 ADS13Fas of Mar 31, 2026

13F — a manager's quarterly holdings · 13D/13G — an ownership statement filed at 5% or more · Form 4 — an insider's transaction report

Institutions13F, as of Mar 31, 2026

67 holders · 75.38M shares · 13 new positions · 28 increased · 18 reduced · 24 closed

HolderShares% outstandingChg q/qFiled
Rubric Capital Management LP15.31M9.59%0May 15, 2026
Ecor1 Capital, LLC13.37M8.37%+5.51MMay 15, 2026
683 Capital Management, LLC12.00M7.51%−3.03MMay 15, 2026
Bank of America Corp /DE/8.20M5.13%+8.17MMay 18, 2026
Defilade Capital Management, L.P.7.56M4.73%+7.56MnewJun 12, 2026
Newtyn Management, LLC7.08M4.43%+6.85MMay 15, 2026
Millennium Management LLC3.56M2.23%+3.48MMay 15, 2026
Tejara Capital Ltd2.04M1.28%−122.2KMay 12, 2026

Ownership statements13D/G · 5% or more, as filed

Holder% of classSharesFormFiled
EcoR1 Capital, LLC8.40%66.84M13GMay 15, 2026
683 Capital Management, LLC8.18%65.08M13GJan 6, 2026
Bank of America Corp /DE/5.10%40.98M13GMay 14, 2026

Insider tradesForm 4

Latest trades

No open-market trades in the last 12 months.

CongressHouse and Senate disclosures

Not reported.