Ticker · CUSIP 588056101
Holders (tracked)
7
Combined shares
1,214,431
Combined value
$2.37M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
-1 vs previous quarter over the last 8.
SEC event timeline
13 events
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−175,567 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−972,816 shares · 2025Q413F
- D.E. Shaw & Co. trimmed2026-02-17−154,104 shares · 2025Q413F
- Renaissance Technologies trimmed2026-02-12−51,600 shares · 2025Q413F
- Mario Gabelli (GAMCO) exited2026-02-05−68,795 shares · 2025Q413F
- −340,772 shares · 2025Q313F
- AQR Capital Management exited2025-11-14−251,694 shares · 2025Q313F
- Izzy Englander (Millennium Mgmt) added2025-11-14+137,906 shares · 2025Q313F
- Two Sigma Investments exited2025-11-14−136,913 shares · 2025Q313F
- D.E. Shaw & Co. added2025-11-14+478,485 shares · 2025Q313F
- Renaissance Technologies trimmed2025-11-13−139,500 shares · 2025Q313F
- Norges Bank (Norway SWF) exited2025-11-12−208,900 shares · 2024Q313F
- Mario Gabelli (GAMCO) trimmed2025-11-12−948 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
—
Trimmed4
- Izzy Englander (Millennium Mgmt)−972,816$1.9M
- Ken Griffin (Citadel Advisors)−175,567$348K
- D.E. Shaw & Co.−154,104$305K
- Renaissance Technologies−51,600$102K
Exited1
- Mario Gabelli (GAMCO)−68,795$198K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 11 | $1.96B |
| 2022Q2 | 9 | $83.2M |
| 2022Q3 | 10 | $79K |
| 2022Q4 | 10 | $61.9M |
| 2023Q1 | 10 | $47.6M |
| 2023Q2 | 8 | $66.3M |
| 2023Q3 | 7 | $64.6M |
| 2023Q4 | 7 | $56.4M |
| 2024Q1 | 6 | $51.3M |
| 2024Q2 | 11 | $58.6M |
| 2024Q3 | 10 | $32.7M |
| 2024Q4 | 10 | $24.1M |
| 2025Q1 | 10 | $22.4M |
| 2025Q2 | 11 | $13.4M |
| 2025Q3 | 8 | $7.5M |
| 2025Q4 | 7 | $2.4M |
Who owns MERC
7 super-investors · 2025Q4
Tracked stake
1.21M
shares
Combined value
$2M
% of shares outstanding
—
shares-out unknown
Quarter action mix
Trim6Held1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | D.E. Shaw & Co. | 885.9K | $2M |
| 2 | Ken Griffin Citadel Advisors | 185.9K | $368K |
| 3 | Ken Griffin Citadel Advisors | 56.7K | $112K |
| 4 | Renaissance Technologies | 27.5K | $54K |
| 5 | Izzy Englander Millennium Mgmt | 22.2K | $44K |
| 6 | Ken Griffin Citadel Advisors | 18.6K | $37K |
| 7 | T. Rowe Price | 17.7K | $35 |
Recent moves
20 transactions
- −175,567 · 2025Q4
- TRIMD.E. Shaw & Co.−154,104 · 2025Q4
- −972,816 · 2025Q4
- −51,600 · 2025Q4
- −68,795 · 2025Q4
- −340,772 · 2025Q3
- +478,485 · 2025Q3
- −136,913 · 2025Q3
- −251,694 · 2025Q3
- +137,906 · 2025Q3
- −139,500 · 2025Q3
- −948 · 2025Q3
- −208,900 · 2024Q3
- −126,758 · 2025Q2
- TRIMD.E. Shaw & Co.−9,700 · 2025Q2
- −772,688 · 2025Q2
- TRIMT. Rowe Price−464 · 2025Q2
- +151,638 · 2025Q2
- +236,156 · 2025Q2
- −43,100 · 2025Q2
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