Ticker · CUSIP 576690101
Holders (tracked)
11
Combined shares
530,226
Combined value
$63.26M
Last close
$166.55
Quarter
2025Q4
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
Price is +39.6% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
22 events
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−19,523 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) added2026-02-17+24,173 shares · 2025Q413F
- Two Sigma Investments opened position2026-02-17+2,000 shares · 2025Q413F
- T. Rowe Price added2026-02-17+2,899 shares · 2025Q413F
- AQR Capital Management trimmed2026-02-17−786 shares · 2025Q413F
- Renaissance Technologies exited2026-02-12−11,900 shares · 2025Q413F
- Cathie Wood (ARK Invest) trimmed2026-02-11−129 shares · 2025Q413F
- Ken Fisher (Fisher Asset Mgmt) trimmed2026-02-09−8,432 shares · 2025Q413F
- Mario Gabelli (GAMCO) added2026-02-05+800 shares · 2025Q413F
- First Eagle Investment Management added2026-02-04+33,500 shares · 2025Q413F
- AQR Capital Management added2025-11-14+31,582 shares · 2025Q313F
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−47,462 shares · 2025Q313F
- Steve Cohen (Point72) exited2025-11-14−10,446 shares · 2025Q313F
- D.E. Shaw & Co. trimmed2025-11-14−39,156 shares · 2025Q313F
- T. Rowe Price added2025-11-14+1,078 shares · 2025Q313F
- Renaissance Technologies trimmed2025-11-13−500 shares · 2025Q313F
- Norges Bank (Norway SWF) exited2025-11-13−3,094 shares · 2025Q313F
- Norges Bank (Norway SWF) trimmed2025-11-12−17,470 shares · 2024Q313F
- Mario Gabelli (GAMCO) added2025-11-12+8,000 shares · 2025Q313F
- Ken Fisher (Fisher Asset Mgmt) added2025-11-12+21,529 shares · 2025Q313F
- +24,500 shares · 2025Q313F
- Cathie Wood (ARK Invest) trimmed2025-11-12−207 shares · 2025Q313F
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of MTRN…
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 | $17.85 | +833.0% | $3.6M |
| Mario Gabelli (GAMCO) | 2016Q1 | $31.37 | +430.9% | $32.6M |
| Ken Fisher (Fisher Asset Mgmt) | 2018Q4 | $70.81 | +135.2% | $23.4M |
| D.E. Shaw & Co. | 2016Q1 | $91.07 | +82.9% | $1.5M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $97.08 | +71.6% | $2.3M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $97.08 | +71.6% | $2.3M |
| Two Sigma Investments | 2016Q1 | $101.98 | +63.3% | $333K |
| Cathie Wood (ARK Invest) | 2024Q3 | $107.30 | +55.2% | $94K |
| AQR Capital Management | 2016Q1 | $108.09 | +54.1% | $7.5M |
| Izzy Englander (Millennium Mgmt) | 2016Q1 | $113.75 | +46.4% | $6.0M |
| First Eagle Investment Management | 2025Q3 | $122.84 | +35.6% | $9.7M |
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions1
- Two Sigma Investments+2,000$249K
Added to4
- First Eagle Investment Management+33,500$4.2M
- Izzy Englander (Millennium Mgmt)+24,173$3.0M
- Mario Gabelli (GAMCO)+800$99K
- T. Rowe Price+2,899$360
Trimmed4
- Ken Griffin (Citadel Advisors)−19,523$2.4M
- Ken Fisher (Fisher Asset Mgmt)−8,432$1.0M
- AQR Capital Management−786$98K
- Cathie Wood (ARK Invest)−129$16K
Exited1
- Renaissance Technologies−11,900$1.4M
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 13 | $19.43B |
| 2022Q2 | 11 | $13.71B |
| 2022Q3 | 11 | $13.8M |
| 2022Q4 | 11 | $350.4M |
| 2023Q1 | 14 | $452.1M |
| 2023Q2 | 14 | $451.6M |
| 2023Q3 | 12 | $398.6M |
| 2023Q4 | 11 | $509.8M |
| 2024Q1 | 11 | $507.4M |
| 2024Q2 | 11 | $418.5M |
| 2024Q3 | 11 | $57.6M |
| 2024Q4 | 11 | $50.3M |
| 2025Q1 | 12 | $45.4M |
| 2025Q2 | 11 | $43.0M |
| 2025Q3 | 10 | $58.1M |
| 2025Q4 | 11 | $63.3M |
Who owns MTRN
11 super-investors · 2025Q4
Tracked stake
530.2K
shares
Combined value
$63M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added4Trim5Held1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Mario Gabelli GAMCO | 195.9K | $24M |
| 2 | Ken Fisher Fisher Asset Mgmt | 140.3K | $17M |
| 3 | First Eagle Investment Management | 58.0K | $7M |
| 4 | AQR Capital Management | 44.9K | $6M |
| 5 | Izzy Englander Millennium Mgmt | 35.8K | $4M |
| 6 | Ken Griffin Citadel Advisors | 14.0K | $2M |
| 7 | D.E. Shaw & Co. | 8.8K | $1M |
| 8 | Ken Griffin Citadel Advisors | 8.5K | $1M |
| 9 | Two Sigma Investments | 2.0K | $249K |
| 10 | Cathie Wood ARK Invest | 565 | $70K |
| 11 | T. Rowe Price | 21.4K | $3K |
Recent moves
20 transactions
- −786 · 2025Q4
- +24,173 · 2025Q4
- −19,523 · 2025Q4
- +2,000 · 2025Q4
- +2,899 · 2025Q4
- −11,900 · 2025Q4
- −129 · 2025Q4
- −8,432 · 2025Q4
- +800 · 2025Q4
- +33,500 · 2025Q4
- −10,446 · 2025Q3
- TRIMD.E. Shaw & Co.−39,156 · 2025Q3
- −47,462 · 2025Q3
- +1,078 · 2025Q3
- +31,582 · 2025Q3
- −3,094 · 2025Q3
- −500 · 2025Q3
- −17,470 · 2024Q3
- +24,500 · 2025Q3
- −207 · 2025Q3
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