Ticker · CUSIP 589492107
Holders (tracked)
5
Combined shares
1,551,842
Combined value
$646.7K
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
-2 vs previous quarter over the last 8.
SEC event timeline
8 events
- Ken Griffin (Citadel Advisors) exited2026-02-17−3,171,632 shares · 2025Q413F
- Two Sigma Investments trimmed2026-02-17−562,971 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−253,857 shares · 2025Q413F
- Renaissance Technologies trimmed2026-02-12−396,500 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−258,170 shares · 2025Q313F
- Steve Cohen (Point72) exited2025-11-14−59,200 shares · 2025Q313F
- Two Sigma Investments added2025-11-14+428,938 shares · 2025Q313F
- Renaissance Technologies trimmed2025-11-13−889,600 shares · 2025Q313F
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 positions0
—
Added to0
—
Trimmed3
- Two Sigma Investments−562,971$235K
- Renaissance Technologies−396,500$165K
- Izzy Englander (Millennium Mgmt)−253,857$106K
Exited1
- Ken Griffin (Citadel Advisors)−3,171,632$6.5M
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 7 | $22.8M |
| 2022Q2 | 7 | $16.8M |
| 2022Q3 | 7 | $14K |
| 2022Q4 | 5 | $2.4M |
| 2023Q1 | 4 | $2.2M |
| 2023Q2 | 5 | $3.9M |
| 2023Q3 | 5 | $4.7M |
| 2023Q4 | 7 | $4.8M |
| 2024Q1 | 10 | $9.1M |
| 2024Q2 | 7 | $20.6M |
| 2024Q3 | 6 | $29.2M |
| 2024Q4 | 7 | $20.2M |
| 2025Q1 | 8 | $6.2M |
| 2025Q2 | 9 | $11.3M |
| 2025Q3 | 7 | $11.0M |
| 2025Q4 | 5 | $647K |
Who owns MREO
5 super-investors · 2025Q4
Tracked stake
1.55M
shares
Combined value
$647K
% of shares outstanding
—
shares-out unknown
Quarter action mix
Trim3Sold2
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Ken Griffin Citadel Advisors | 617.2K | $257K |
| 2 | Two Sigma Investments | 525.1K | $219K |
| 3 | Renaissance Technologies | 194.4K | $81K |
| 4 | Ken Griffin Citadel Advisors | 131.5K | $55K |
| 5 | Izzy Englander Millennium Mgmt | 83.6K | $35K |
Recent moves
20 transactions
- −562,971 · 2025Q4
- −253,857 · 2025Q4
- −3,171,632 · 2025Q4
- −396,500 · 2025Q4
- −258,170 · 2025Q3
- −59,200 · 2025Q3
- +428,938 · 2025Q3
- −889,600 · 2025Q3
- +201,242 · 2025Q2
- +23,384 · 2025Q2
- +413,952 · 2025Q2
- +130,000 · 2025Q2
- +35,816 · 2025Q1
- −3,571,001 · 2025Q1
- +176,471 · 2025Q1
- +161,000 · 2025Q1
- −1,429,259 · 2024Q4
- −65,578 · 2024Q4
- −115,900 · 2024Q4
- −67,463 · 2024Q3
Embed this chart
Paste this iframe anywhere to embed the live MREO chart.
<iframe src="https://openstocks.me/embed/stock/MREO" width="100%" height="480" frameborder="0" loading="lazy" title="MREO chart by OpenStocks" style="border:0;border-radius:12px;background:transparent"></iframe>