Ticker · CUSIP 591520200
Holders (tracked)
10
Combined shares
3,265,494
Combined value
$21.37M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
SEC event timeline
16 events
- D.E. Shaw & Co. trimmed2026-02-17−20,668 shares · 2025Q413F
- Ken Griffin (Citadel Advisors) added2026-02-17+228,066 shares · 2025Q413F
- Two Sigma Investments added2026-02-17+19,054 shares · 2025Q413F
- +212,625 shares · 2025Q413F
- AQR Capital Management trimmed2026-02-17−153,002 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−540 shares · 2025Q413F
- Steve Cohen (Point72) opened position2026-02-17+135,962 shares · 2025Q413F
- Renaissance Technologies added2026-02-12+41,200 shares · 2025Q413F
- −88,065 shares · 2025Q313F
- AQR Capital Management added2025-11-14+184,952 shares · 2025Q313F
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−169,963 shares · 2025Q313F
- Two Sigma Investments added2025-11-14+218,841 shares · 2025Q313F
- D.E. Shaw & Co. trimmed2025-11-14−463,969 shares · 2025Q313F
- T. Rowe Price added2025-11-14+189 shares · 2025Q313F
- Renaissance Technologies opened position2025-11-13+20,300 shares · 2025Q313F
- Norges Bank (Norway SWF) trimmed2025-11-12−109,781 shares · 2024Q313F
Insider activity
No insider transactions in the last 30 days.
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions2
- Paul Tudor Jones (Tudor Investment)+212,625$1.4M
- Steve Cohen (Point72)+135,962$903K
Added to3
- Ken Griffin (Citadel Advisors)+228,066$1.5M
- Renaissance Technologies+41,200$274K
- Two Sigma Investments+19,054$127K
Trimmed3
- AQR Capital Management−153,002$1.0M
- D.E. Shaw & Co.−20,668$137K
- Izzy Englander (Millennium Mgmt)−540$4K
Exited0
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Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 7 | $17.01B |
| 2022Q2 | 9 | $12.39B |
| 2022Q3 | 9 | $12.8M |
| 2022Q4 | 9 | $300.1M |
| 2023Q1 | 10 | $290.2M |
| 2023Q2 | 13 | $227.8M |
| 2023Q3 | 13 | $164.1M |
| 2023Q4 | 11 | $157.9M |
| 2024Q1 | 10 | $91.1M |
| 2024Q2 | 13 | $66.0M |
| 2024Q3 | 12 | $44.0M |
| 2024Q4 | 10 | $39.4M |
| 2025Q1 | 9 | $19.8M |
| 2025Q2 | 9 | $28.3M |
| 2025Q3 | 9 | $21.2M |
| 2025Q4 | 10 | $21.4M |
Who owns MEI
10 super-investors · 2025Q4
Tracked stake
3.27M
shares
Combined value
$21M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New2Added4Trim3Held1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | AQR Capital Management | 1.24M | $8M |
| 2 | D.E. Shaw & Co. | 657.0K | $4M |
| 3 | Two Sigma Investments | 473.5K | $3M |
| 4 | Ken Griffin Citadel Advisors | 329.1K | $2M |
| 5 | Paul Tudor Jones Tudor Investment | 212.6K | $1M |
| 6 | Steve Cohen Point72 | 136.0K | $903K |
| 7 | Renaissance Technologies | 61.5K | $408K |
| 8 | Izzy Englander Millennium Mgmt | 58.9K | $391K |
| 9 | Ken Griffin Citadel Advisors | 47.7K | $317K |
| 10 | T. Rowe Price | 47.5K | $316 |
Recent moves
20 transactions
- +212,625 · 2025Q4
- +228,066 · 2025Q4
- −540 · 2025Q4
- +135,962 · 2025Q4
- TRIMD.E. Shaw & Co.−20,668 · 2025Q4
- −153,002 · 2025Q4
- +19,054 · 2025Q4
- +41,200 · 2025Q4
- −88,065 · 2025Q3
- +218,841 · 2025Q3
- −169,963 · 2025Q3
- TRIMD.E. Shaw & Co.−463,969 · 2025Q3
- +189 · 2025Q3
- +184,952 · 2025Q3
- +20,300 · 2025Q3
- −109,781 · 2024Q3
- TRIMD.E. Shaw & Co.−254,341 · 2025Q2
- +2,002 · 2025Q2
- −112,747 · 2025Q2
- −43,066 · 2025Q2
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