Position in MTRN
as of Mar 31, 2026
· filed May 13, 2026
Position Value
$11,515,296
+$2,737,684 QoQ
Shares Held
79,608
+12.8% QoQ
Ownership
0.383%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Jun 2021
20 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in MTRN Over Time
Shares Held
Position Value (USD)
Position in Other Industrial Metals & Mining
Basic Materials · as of Mar 31, 2026SEI INVESTMENTS CO holds $97,675,384 across 15 Other Industrial Metals & Mining names. MTRN ranks #2 (11.8% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | RIO |
Rio Tinto PLC
|
564,191 | $52,633,377 | |
| 2 | MTRN |
MATERION Corp
This page
|
79,608 | $11,515,296 | |
| 3 | VALE |
Vale S.A.
|
622,592 | $9,905,437 | |
| 4 | BHP |
BHP Group Ltd
|
72,230 | $5,254,010 | |
| 5 | USAR |
USA Rare Earth, Inc.
|
276,819 | $4,189,655 | |
| 6 | ALM |
Almonty Industries Inc.
|
216,039 | $3,128,243 | |
| 7 | TECK |
Teck Resources Ltd
|
50,936 | $2,635,937 | |
| 8 | GSM |
Ferroglobe PLC
|
639,440 | $2,634,491 |
All Filings in MTRN
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20 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $11,515,296 | 79,608 | Shares | Sole | 2026-05-13 | |
| 2025-12-31 | $8,777,612 | 70,605 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $7,293,057 | 60,368 | Shares | Sole | 2025-11-13 | |
| 2025-06-30 | $4,355,666 | 54,878 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $4,210,314 | 51,597 | Shares | Sole | 2025-05-14 | |
| 2024-12-31 | $4,387,008 | 44,367 | Shares | Sole | 2025-02-11 | |
| 2024-09-30 | $4,588,497 | 41,020 | Shares | Sole | 2024-11-12 | |
| 2024-06-30 | $3,997,782 | 36,972 | Shares | Sole | 2024-08-13 | |
| 2024-03-31 | $4,202,561 | 31,898 | Shares | Sole | 2024-05-07 | |
| 2023-12-31 | $3,470,436 | 26,669 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $2,585,252 | 25,368 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $3,119,258 | 27,314 | Shares | Sole | 2023-08-11 | |
| 2023-03-31 | $3,636,832 | 31,352 | Shares | Defined | 2023-05-12 | |
| 2022-12-31 | $2,406,612 | 27,501 | Shares | Sole | 2023-02-10 | |
| 2022-09-30 | $1,452,560 | 18,157 | Shares | Defined | 2022-11-14 | |
| 2022-06-30 | $730,590 | 9,909 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $646,908 | 7,545 | Shares | Sole | 2022-05-13 | |
| 2021-12-31 | $575,268 | 6,257 | Shares | Sole | 2022-02-14 | |
| 2021-09-30 | $344,710 | 5,022 | Shares | Sole | 2021-11-12 | |
| 2021-06-30 | $315,867 | 4,192 | Shares | Sole | 2021-08-06 | |
| No filing history on record for this holder in this stock. | ||||||