MEI PHARMA INC (MEIP) Institutional Ownership Changes & 13F Activity

MEI PHARMA INC (MEIP). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q4 2025). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Citadel Advisors Llc, Marshall Wace, Llp, Two Sigma Investments, Lp, Mozayyx Management Llc, and Renaissance Technologies LLC.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Mozayyx Management LlcBuy+559,795—559,795$738.93KQ4 2025Mar 05, 2026
Virtu Financial LlcBuy+26,636—26,636$35.00KQ4 2025Feb 23, 2026
Citadel Advisors LlcBuy+1,378,311—1,378,311$1.82MQ4 2025Feb 17, 2026
Two Sigma Investments, LpBuy+657,615—657,615$868.05KQ4 2025Feb 17, 2026
Polar Asset Management Partners Inc.Buy+276,638—276,638$365.16KQ4 2025Feb 17, 2026
Two Sigma Advisers, LpBuy+204,300—204,300$269.68KQ4 2025Feb 17, 2026
Xtx Topco LtdBuy+111,012—111,012$146.54KQ4 2025Feb 17, 2026
Quadrature Capital LtdBuy+85,149—85,149$112.40KQ4 2025Feb 17, 2026
Susquehanna International Group, LlpBuy+81,202—81,202$107.19KQ4 2025Feb 17, 2026
Northern Trust CorpBuy+80,231—80,231$105.91KQ4 2025Feb 17, 2026
Adar1 Capital Management, LlcBuy+67,292—67,292$88.83KQ4 2025Feb 17, 2026
Alpine Global Management, LlcBuy+50,000—50,000$66.00KQ4 2025Feb 17, 2026
Nomura Asset Management International Inc.Buy+29,999—29,999$40.00KQ4 2025Feb 17, 2026
Engineers Gate Manager LpBuy+13,879—13,879$18.32KQ4 2025Feb 17, 2026
Two Sigma Securities, LlcBuy+12,443—12,443$16.43KQ4 2025Feb 17, 2026
Tower Research Capital Llc (Trc)Buy+3,245—3,245$4.28KQ4 2025Feb 17, 2026
Bank Of America CorpBuy+457—457$603.00Q4 2025Feb 17, 2026
Osaic Holdings, Inc.Buy+2—2$2.00Q4 2025Feb 17, 2026
Marshall Wace, LlpBuy+759,418—759,418$1.00MQ4 2025Feb 13, 2026
Quarry LpBuy+200,000—200,000$264.00KQ4 2025Feb 13, 2026
State Street CorpBuy+115,021—115,021$151.83KQ4 2025Feb 13, 2026
Morgan StanleyBuy+71,458—71,458$94.33KQ4 2025Feb 13, 2026
Squarepoint Ops LlcBuy+14,655—14,655$19.34KQ4 2025Feb 13, 2026
Mai Capital ManagementBuy+75—75$99.00Q4 2025Feb 13, 2026
Wells Fargo & Company/MnBuy+25—25$33.00Q4 2025Feb 13, 2026
Renaissance Technologies LLCBuy+522,741+51.3%1,541,422$2.03MQ4 2025Feb 12, 2026
Blackrock, Inc.Buy+157,891—157,891$208.42KQ4 2025Feb 12, 2026
Jane Street Group, LlcBuy+151,443—151,443$199.91KQ4 2025Feb 12, 2026
Hrt Financial LpBuy+32,099—32,099$42.00KQ4 2025Feb 12, 2026
Group One Trading LlcBuy+26,712—26,712$35.26KQ4 2025Feb 12, 2026
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Frequently asked questions about MEIP activity

  • Which institutional owners are buying MEIP?

    Institutional owners buying MEIP 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 MEIP activity?

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

  • Is institutional interest in MEIP increasing?

    Institutional interest in MEIP 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.