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.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Mozayyx Management Llc | Buy | +559,795 | — | 559,795 | $738.93K | Q4 2025 | Mar 05, 2026 |
| Virtu Financial Llc | Buy | +26,636 | — | 26,636 | $35.00K | Q4 2025 | Feb 23, 2026 |
| Citadel Advisors Llc | Buy | +1,378,311 | — | 1,378,311 | $1.82M | Q4 2025 | Feb 17, 2026 |
| Two Sigma Investments, Lp | Buy | +657,615 | — | 657,615 | $868.05K | Q4 2025 | Feb 17, 2026 |
| Polar Asset Management Partners Inc. | Buy | +276,638 | — | 276,638 | $365.16K | Q4 2025 | Feb 17, 2026 |
| Two Sigma Advisers, Lp | Buy | +204,300 | — | 204,300 | $269.68K | Q4 2025 | Feb 17, 2026 |
| Xtx Topco Ltd | Buy | +111,012 | — | 111,012 | $146.54K | Q4 2025 | Feb 17, 2026 |
| Quadrature Capital Ltd | Buy | +85,149 | — | 85,149 | $112.40K | Q4 2025 | Feb 17, 2026 |
| Susquehanna International Group, Llp | Buy | +81,202 | — | 81,202 | $107.19K | Q4 2025 | Feb 17, 2026 |
| Northern Trust Corp | Buy | +80,231 | — | 80,231 | $105.91K | Q4 2025 | Feb 17, 2026 |
| Adar1 Capital Management, Llc | Buy | +67,292 | — | 67,292 | $88.83K | Q4 2025 | Feb 17, 2026 |
| Alpine Global Management, Llc | Buy | +50,000 | — | 50,000 | $66.00K | Q4 2025 | Feb 17, 2026 |
| Nomura Asset Management International Inc. | Buy | +29,999 | — | 29,999 | $40.00K | Q4 2025 | Feb 17, 2026 |
| Engineers Gate Manager Lp | Buy | +13,879 | — | 13,879 | $18.32K | Q4 2025 | Feb 17, 2026 |
| Two Sigma Securities, Llc | Buy | +12,443 | — | 12,443 | $16.43K | Q4 2025 | Feb 17, 2026 |
| Tower Research Capital Llc (Trc) | Buy | +3,245 | — | 3,245 | $4.28K | Q4 2025 | Feb 17, 2026 |
| Bank Of America Corp | Buy | +457 | — | 457 | $603.00 | Q4 2025 | Feb 17, 2026 |
| Osaic Holdings, Inc. | Buy | +2 | — | 2 | $2.00 | Q4 2025 | Feb 17, 2026 |
| Marshall Wace, Llp | Buy | +759,418 | — | 759,418 | $1.00M | Q4 2025 | Feb 13, 2026 |
| Quarry Lp | Buy | +200,000 | — | 200,000 | $264.00K | Q4 2025 | Feb 13, 2026 |
| State Street Corp | Buy | +115,021 | — | 115,021 | $151.83K | Q4 2025 | Feb 13, 2026 |
| Morgan Stanley | Buy | +71,458 | — | 71,458 | $94.33K | Q4 2025 | Feb 13, 2026 |
| Squarepoint Ops Llc | Buy | +14,655 | — | 14,655 | $19.34K | Q4 2025 | Feb 13, 2026 |
| Mai Capital Management | Buy | +75 | — | 75 | $99.00 | Q4 2025 | Feb 13, 2026 |
| Wells Fargo & Company/Mn | Buy | +25 | — | 25 | $33.00 | Q4 2025 | Feb 13, 2026 |
| Renaissance Technologies LLC | Buy | +522,741 | +51.3% | 1,541,422 | $2.03M | Q4 2025 | Feb 12, 2026 |
| Blackrock, Inc. | Buy | +157,891 | — | 157,891 | $208.42K | Q4 2025 | Feb 12, 2026 |
| Jane Street Group, Llc | Buy | +151,443 | — | 151,443 | $199.91K | Q4 2025 | Feb 12, 2026 |
| Hrt Financial Lp | Buy | +32,099 | — | 32,099 | $42.00K | Q4 2025 | Feb 12, 2026 |
| Group One Trading Llc | Buy | +26,712 | — | 26,712 | $35.26K | Q4 2025 | Feb 12, 2026 |
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.
Related MEIP Institutional Insights
- MEIP Overview
- MEIP 13F Institutional Holders
- MEIP Superinvestors
- Healthcare Sector Institutional Ownership
- Healthcare Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
- Most Bought Healthcare Stocks By Institutional Investors
- Most Sold Healthcare Stocks By Institutional Investors
- MEIP Insider Trading & SEC Form 4 Activity
- MEIP Articles
- Top Institutional Investor Stock Rankings