Ticker · CUSIP 58958P104
Holders (tracked)
6
Combined shares
216,545
Combined value
$3.81M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
SEC event timeline
10 events
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−54,238 shares · 2025Q413F
- Two Sigma Investments added2026-02-17+17,636 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) added2026-02-17+2,051 shares · 2025Q413F
- Steve Cohen (Point72) opened position2026-02-17+17,833 shares · 2025Q413F
- AQR Capital Management added2026-02-17+6,541 shares · 2025Q413F
- Renaissance Technologies trimmed2026-02-12−39,700 shares · 2025Q413F
- AQR Capital Management opened position2025-11-14+25,957 shares · 2025Q313F
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−45,375 shares · 2025Q313F
- Two Sigma Investments opened position2025-11-14+82,838 shares · 2025Q313F
- Renaissance Technologies added2025-11-13+9,700 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 positions1
- Steve Cohen (Point72)+17,833$314K
Added to3
- Two Sigma Investments+17,636$310K
- AQR Capital Management+6,541$115K
- Izzy Englander (Millennium Mgmt)+2,051$36K
Trimmed2
- Ken Griffin (Citadel Advisors)−54,238$954K
- Renaissance Technologies−39,700$698K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 4 | $7.8M |
| 2022Q2 | 4 | $6.2M |
| 2022Q3 | 4 | $6K |
| 2022Q4 | 4 | $4.1M |
| 2023Q1 | 5 | $3.5M |
| 2023Q2 | 4 | $3.4M |
| 2023Q3 | 4 | $2.6M |
| 2023Q4 | 4 | $3.5M |
| 2024Q1 | 3 | $2.1M |
| 2024Q2 | 3 | $2.6M |
| 2024Q3 | 3 | $1.2M |
| 2024Q4 | 3 | $2.0M |
| 2025Q1 | 3 | $4.0M |
| 2025Q2 | 3 | $2.1M |
| 2025Q3 | 5 | $4.2M |
| 2025Q4 | 6 | $3.8M |
Who owns MRBK
6 super-investors · 2025Q4
Tracked stake
216.5K
shares
Combined value
$4M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added3Trim2
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Two Sigma Investments | 100.5K | $2M |
| 2 | AQR Capital Management | 32.5K | $571K |
| 3 | Izzy Englander Millennium Mgmt | 25.5K | $449K |
| 4 | Renaissance Technologies | 22.9K | $403K |
| 5 | Steve Cohen Point72 | 17.8K | $314K |
| 6 | Ken Griffin Citadel Advisors | 17.3K | $304K |
Recent moves
20 transactions
- +2,051 · 2025Q4
- +17,833 · 2025Q4
- +17,636 · 2025Q4
- −54,238 · 2025Q4
- +6,541 · 2025Q4
- −39,700 · 2025Q4
- +25,957 · 2025Q3
- +82,838 · 2025Q3
- −45,375 · 2025Q3
- +9,700 · 2025Q3
- −136,290 · 2025Q2
- +14,900 · 2025Q2
- +152,900 · 2025Q1
- −40,900 · 2025Q1
- +42,004 · 2024Q4
- +9,700 · 2024Q4
- −680 · 2024Q3
- +34,600 · 2024Q3
- −4,944 · 2024Q2
- ADDBlackRock+8,901 · 2024Q2
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