Position in MTRN
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$18,776,015
+$7,260,719 QoQ
Shares Held
63,136
-20.7% QoQ
Ownership
0.303%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
#54
of 402 holders
Holding Since
Jun 2021
21 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, 2026SEI INVESTMENTS CO holds $101,898,769 across 14 Other Industrial Metals & Mining names. MTRN ranks #2 (18.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | RIO |
Rio Tinto PLC
|
549,969 | $52,208,556 | |
| 2 | MTRN |
MATERION Corp
This page
|
63,136 | $18,776,015 | |
| 3 | VALE |
Vale S.A.
|
600,839 | $9,036,618 | |
| 4 | BHP |
BHP Group Ltd
|
80,996 | $6,747,776 | |
| 5 | ALM |
Almonty Industries Inc.
|
301,659 | $4,995,472 | |
| 6 | USAR |
USA Rare Earth, Inc.
|
191,978 | $4,142,884 | |
| 7 | MP |
MP Materials Corp. / DE
|
36,850 | $2,063,967 | |
| 8 | NAK |
Northern Dynasty Minerals Ltd
|
868,173 | $1,666,892 |
All Filings in MTRN
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21 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $18,776,015 | 63,136 | Shares | Sole | 2026-08-14 | |
| 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. | ||||||