Ticker · CUSIP 603158106
Holders (tracked)
9
Combined shares
1,195,201
Combined value
$70.32M
Last close
$71.75
Quarter
2025Q4
Tracked holders · last 8 quarters
Flat over the last 8 quarters.
Price is +22.0% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
20 events
- AQR Capital Management trimmed2026-02-17−40,632 shares · 2025Q413F
- D.E. Shaw & Co. added2026-02-17+56,095 shares · 2025Q413F
- Steve Cohen (Point72) exited2026-02-17−400 shares · 2025Q413F
- T. Rowe Price added2026-02-17+6,347 shares · 2025Q413F
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−41,437 shares · 2025Q413F
- Two Sigma Investments trimmed2026-02-17−27,196 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) added2026-02-17+15,782 shares · 2025Q413F
- +4,873 shares · 2025Q413F
- Renaissance Technologies trimmed2026-02-12−14,700 shares · 2025Q413F
- Mario Gabelli (GAMCO) trimmed2026-02-05−1,802 shares · 2025Q413F
- AQR Capital Management added2025-11-14+100,737 shares · 2025Q313F
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−73,058 shares · 2025Q313F
- Steve Cohen (Point72) opened position2025-11-14+400 shares · 2025Q313F
- Two Sigma Investments trimmed2025-11-14−21,233 shares · 2025Q313F
- D.E. Shaw & Co. added2025-11-14+54,929 shares · 2025Q313F
- T. Rowe Price added2025-11-14+1,519 shares · 2025Q313F
- Renaissance Technologies added2025-11-13+1,200 shares · 2025Q313F
- Norges Bank (Norway SWF) exited2025-11-13−21,803 shares · 2025Q313F
- Norges Bank (Norway SWF) trimmed2025-11-12−42,655 shares · 2024Q313F
- Mario Gabelli (GAMCO) trimmed2025-11-12−4,195 shares · 2025Q313F
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of MTX…
Cost basis inferred from 13F share-delta history. Sorted by % return on the position they're still holding.
| Investor | First in | Cost basis | Return | Position value today |
|---|---|---|---|---|
| T. Rowe Price | 2016Q1 | $18.88 | +280.0% | $3.0M |
| Renaissance Technologies | 2017Q1 | $37.61 | +90.8% | $825K |
| Mario Gabelli (GAMCO) | 2016Q1 | $55.45 | +29.4% | $19.8M |
| Izzy Englander (Millennium Mgmt) | 2016Q1 | $56.22 | +27.6% | $13.4M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $60.91 | +17.8% | $2.3M |
| D.E. Shaw & Co. | 2016Q1 | $61.34 | +17.0% | $29.0M |
| Two Sigma Investments | 2017Q4 | $61.68 | +16.3% | $5.3M |
| AQR Capital Management | 2016Q1 | $62.65 | +14.5% | $11.8M |
| Ray Dalio (Bridgewater Associates) | 2024Q2 | $73.73 | -2.7% | $350K |
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions1
- Ray Dalio (Bridgewater Associates)+4,873$297K
Added to3
- D.E. Shaw & Co.+56,095$3.4M
- Izzy Englander (Millennium Mgmt)+15,782$962K
- T. Rowe Price+6,347$387
Trimmed5
- Ken Griffin (Citadel Advisors)−41,437$2.5M
- AQR Capital Management−40,632$2.5M
- Two Sigma Investments−27,196$1.7M
- Renaissance Technologies−14,700$896K
- Mario Gabelli (GAMCO)−1,802$110K
Exited1
- Steve Cohen (Point72)−400$25K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 9 | $22.52B |
| 2022Q2 | 9 | $19.87B |
| 2022Q3 | 11 | $16.6M |
| 2022Q4 | 9 | $377.0M |
| 2023Q1 | 10 | $359.6M |
| 2023Q2 | 12 | $359.1M |
| 2023Q3 | 13 | $326.8M |
| 2023Q4 | 11 | $468.4M |
| 2024Q1 | 12 | $521.8M |
| 2024Q2 | 15 | $576.5M |
| 2024Q3 | 14 | $99.2M |
| 2024Q4 | 10 | $58.7M |
| 2025Q1 | 9 | $44.7M |
| 2025Q2 | 9 | $67.7M |
| 2025Q3 | 9 | $74.7M |
| 2025Q4 | 9 | $70.3M |
Congress members trading this stock
| Date | Member | Type | Amount range | Filing |
|---|---|---|---|---|
| 2026-01-05 | Gilbert Cisneros | Sell (P) | $1K – $15K | PDF ↗ |
| 2025-05-06 | Gilbert Cisneros | Buy | $1K – $15K | PDF ↗ |
Who owns MTX
9 super-investors · 2025Q4
Tracked stake
1.20M
shares
Combined value
$70M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added3Trim5
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | D.E. Shaw & Co. | 404.4K | $25M |
| 2 | Mario Gabelli GAMCO | 276.1K | $17M |
| 3 | Izzy Englander Millennium Mgmt | 186.4K | $11M |
| 4 | AQR Capital Management | 163.8K | $10M |
| 5 | Two Sigma Investments | 74.0K | $5M |
| 6 | Ken Griffin Citadel Advisors | 32.7K | $2M |
| 7 | Renaissance Technologies | 11.5K | $701K |
| 8 | Ray Dalio Bridgewater Associates | 4.9K | $297K |
| 9 | T. Rowe Price | 41.6K | $3K |
Recent moves
20 transactions
- +6,347 · 2025Q4
- +15,782 · 2025Q4
- −41,437 · 2025Q4
- −40,632 · 2025Q4
- −27,196 · 2025Q4
- +56,095 · 2025Q4
- −400 · 2025Q4
- +4,873 · 2025Q4
- −14,700 · 2025Q4
- −1,802 · 2025Q4
- +1,519 · 2025Q3
- −21,233 · 2025Q3
- −73,058 · 2025Q3
- +400 · 2025Q3
- +100,737 · 2025Q3
- +54,929 · 2025Q3
- +1,200 · 2025Q3
- −21,803 · 2025Q3
- −4,195 · 2025Q3
- −42,655 · 2024Q3
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