Position in MTRN
as of Jun 30, 2026
· filed Aug 12, 2026
Position Value
$494,559
+$321,318 QoQ
Shares Held
1,663
+16.0% QoQ
Ownership
0.008%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
#230
of 402 holders
Holding Since
Jun 2020
9 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in MTRN Over Time
Shares Held
Position Value (USD)
Position in Other Industrial Metals & Mining
Basic Materials · as of Jun 30, 2026SIMPLEX TRADING, LLC holds $11,292,779 across 22 Other Industrial Metals & Mining names. MTRN ranks #5 (4.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | USAR |
USA Rare Earth, Inc.
|
187,412 | $4,044,350 | |
| 2 | VALE |
Vale S.A.
|
217,034 | $3,264,191 | |
| 3 | SGML |
Sigma Lithium Corp
|
95,358 | $1,206,278 | |
| 4 | NAK |
Northern Dynasty Minerals Ltd
|
291,104 | $558,919 | |
| 5 | MTRN |
MATERION Corp
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|
1,663 | $494,559 | |
| 6 | ALM |
Almonty Industries Inc.
|
21,079 | $349,068 | |
| 7 | VZLA |
Vizsla Silver Corp.
|
87,305 | $288,106 | |
| 8 | TMC |
TMC the metals Co Inc.
|
51,114 | $226,435 |
All Filings in MTRN
Export CSV
9 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $494,559 | 1,663 | Shares | Sole | 2026-08-12 | |
| 2025-09-30 | $173,241 | 1,434 | Shares | Sole | 2025-11-12 | |
| 2024-09-30 | $6,599 | 59 | Shares | Sole | 2024-11-08 | |
| 2021-09-30 | $10,364 | 151 | Shares | Sole | 2021-10-28 | |
| 2021-06-30 | $11,377 | 151 | Shares | Sole | 2021-08-12 | |
| 2021-03-31 | $42,459 | 641 | Shares | Sole | 2021-04-26 | |
| 2020-12-31 | $53,907 | 846 | Shares | Sole | 2021-02-02 | |
| 2020-09-30 | $20,447 | 393 | Shares | Sole | 2020-10-14 | |
| 2020-06-30 | $159,874 | 2,600 | Shares | Sole | 2020-07-13 | |
| No filing history on record for this holder in this stock. | ||||||