Ticker · CUSIP 59045L205
Holders (tracked)
5
Combined shares
143,426
Combined value
$4.15M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 2.
SEC event timeline
11 events
- AQR Capital Management trimmed2026-02-17−9,456 shares · 2025Q413F
- Two Sigma Investments exited2026-02-17−30,688 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−14,684 shares · 2025Q413F
- Steve Cohen (Point72) opened position2026-02-17+10,364 shares · 2025Q413F
- +22,493 shares · 2025Q413F
- Renaissance Technologies exited2026-02-12−88,465 shares · 2025Q413F
- Mario Gabelli (GAMCO) opened position2026-02-05+10,000 shares · 2025Q413F
- +77,989 shares · 2025Q313F
- Two Sigma Investments opened position2025-11-14+30,688 shares · 2025Q313F
- AQR Capital Management opened position2025-11-14+46,720 shares · 2025Q313F
- Renaissance Technologies opened position2025-11-13+88,465 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 positions3
- Ken Griffin (Citadel Advisors)+22,493$651K
- Steve Cohen (Point72)+10,364$300K
- Mario Gabelli (GAMCO)+10,000$289K
Added to0
—
Trimmed2
- Izzy Englander (Millennium Mgmt)−14,684$425K
- AQR Capital Management−9,456$274K
Exited2
- Renaissance Technologies−88,465$686K
- Two Sigma Investments−30,688$238K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2025Q3 | 4 | $1.9M |
| 2025Q4 | 5 | $4.1M |
Who owns MRSN
5 super-investors · 2025Q4
Tracked stake
143.4K
shares
Combined value
$4M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New3Trim2
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Izzy Englander Millennium Mgmt | 63.3K | $2M |
| 2 | AQR Capital Management | 37.3K | $1M |
| 3 | Ken Griffin Citadel Advisors | 22.5K | $651K |
| 4 | Steve Cohen Point72 | 10.4K | $300K |
| 5 | Mario Gabelli GAMCO | 10.0K | $289K |
Recent moves
11 transactions
- −9,456 · 2025Q4
- −30,688 · 2025Q4
- −14,684 · 2025Q4
- +10,364 · 2025Q4
- +22,493 · 2025Q4
- −88,465 · 2025Q4
- +10,000 · 2025Q4
- +77,989 · 2025Q3
- +30,688 · 2025Q3
- +46,720 · 2025Q3
- +88,465 · 2025Q3
Embed this chart
Paste this iframe anywhere to embed the live MRSN chart.
<iframe src="https://openstocks.me/embed/stock/MRSN" width="100%" height="480" frameborder="0" loading="lazy" title="MRSN chart by OpenStocks" style="border:0;border-radius:12px;background:transparent"></iframe>