MEREO BIOPHARMA GROUP PL-ADR (MREO) Institutional Ownership Changes & 13F Activity

MEREO BIOPHARMA GROUP PL-ADR (MREO). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Ecor1 Capital, Llc, Newtyn Management, Llc, Two Sigma Investments, Lp, Ishara Investments Lp, and Jane Street Group, Llc.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Citadel Advisors LlcBuy+444,158444,158$141.11KQ2 2026Sep 02, 2026
Ecor1 Capital, LlcSell-12,368,855-92.5%1,000,000$317.70KQ2 2026Aug 14, 2026
Newtyn Management, LlcSell-4,079,056-57.6%3,000,000$953.10KQ2 2026Aug 14, 2026
Two Sigma Investments, LpBuy+1,131,402+602.3%1,319,241$419.12KQ2 2026Aug 14, 2026
Ishara Investments LpBuy+768,750768,750$244.23KQ2 2026Aug 14, 2026
Jane Street Group, LlcBuy+634,971+453.6%774,944$246.20KQ2 2026Aug 14, 2026
683 Capital Management, LlcSell-222,144-1.9%11,777,856$3.74MQ2 2026Aug 14, 2026
Group One Trading LlcSell-168,312-50.1%167,515$53.22KQ2 2026Aug 14, 2026
Nomura Holdings IncBuy+104,361104,361$33.16KQ2 2026Aug 14, 2026
Quarry LpBuy+93,75093,750$29.78KQ2 2026Aug 14, 2026
Xtx Topco LtdBuy+90,012+106.6%174,481$55.43KQ2 2026Aug 14, 2026
Goldman Sachs Group IncBuy+85,18085,180$27.06KQ2 2026Aug 14, 2026
Susquehanna International Group, LlpBuy+17,350+8.9%213,270$67.76KQ2 2026Aug 14, 2026
Two Sigma Securities, LlcBuy+12,90012,900$4.10KQ2 2026Aug 14, 2026
Bank Of America CorpSell-6-0.0%8,195,281$2.60MQ2 2026Aug 14, 2026
Engineers Gate Manager LpSell-1-0.0%23,953$7.61KQ2 2026Aug 14, 2026
Wells Fargo & Company/MnBuy+1+0.4%231$73.00Q2 2026Aug 14, 2026
Marshall Wace, LlpSell-507,103-73.8%179,884$57.56KQ2 2026Aug 13, 2026
Ubs Group AgSell-42,501-2.9%1,447,627$460.35KQ2 2026Aug 13, 2026
Virtu Financial LlcBuy+24,827+68.1%61,285$19.00KQ2 2026Aug 13, 2026
Renaissance Technologies LLCBuy+3,700+7.6%52,100$16.55KQ2 2026Aug 13, 2026
Morgan StanleyBuy+306+1.9%16,731$5.32KQ2 2026Aug 13, 2026
Jpmorgan Chase & CoBuy+58,53158,531$19.42KQ2 2026Aug 12, 2026
Simplex Trading, LlcBuy+18,78018,780$5.97KQ2 2026Aug 12, 2026
Rhumbline AdvisersBuy+7,212+36.8%26,784$8.51KQ2 2026Aug 12, 2026
Clear Harbor Asset Management, LlcSell-3,000-8.6%32,000$10.08KQ2 2026Aug 12, 2026
Wealthspire Advisors, LlcSell-31,036-3.9%765,000$243.04KQ2 2026Aug 11, 2026
Jmn Financial LlcBuy+76,74876,748$24.38KQ2 2026Aug 10, 2026
Arax Advisory PartnersBuy+1,819+45.5%5,819$1.85KQ2 2026Aug 10, 2026
Blackrock, Inc.Sell-233,313-77.0%69,678$22.14KQ2 2026Aug 07, 2026
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Frequently asked questions about MREO activity

  • Which institutional owners are buying MREO?

    Institutional owners buying MREO include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in MREO activity?

    "Buy" means an investor increased their reported position in MREO compared to the prior reporting period. This reflects growing exposure to MEREO BIOPHARMA GROUP PL-ADR (MREO) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in MREO increasing?

    Institutional interest in MREO can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.