Position in MTRN
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$16,111,697
+$12,657,312 QoQ
Shares Held
54,177
+126.9% QoQ
Ownership
0.260%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#60
of 404 holders
Holding Since
Mar 2021
17 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in MTRN Over Time
Shares Held
Position Value (USD)
Derivatives in MTRN
reported options exposure · as of Jun 30, 2026CallValue
$4,550,067
CallShares
15,300
PutValue
$267,651
PutShares
900
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in Other Industrial Metals & Mining
Basic Materials · as of Jun 30, 2026JANE STREET GROUP, LLC holds $264,096,501 across 37 Other Industrial Metals & Mining names. MTRN ranks #6 (6.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | RIO |
Rio Tinto PLC
|
597,611 | $56,731,211 | |
| 2 | LAR |
Lithium Argentina AG
|
4,998,755 | $41,339,703 | |
| 3 | SGML |
Sigma Lithium Corp
|
3,232,654 | $40,893,072 | |
| 4 | VALE |
Vale S.A.
|
2,464,209 | $37,061,703 | |
| 5 | ALM |
Almonty Industries Inc.
|
2,189,580 | $36,259,443 | |
| 6 | MTRN |
MATERION Corp
This page
|
54,177 | $16,111,697 | |
| 7 | TMC |
TMC the metals Co Inc.
|
2,427,576 | $10,754,161 | |
| 8 | IPX |
IPERIONX Ltd
|
224,635 | $6,678,398 |
All Filings in MTRN
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21 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $267,651 | 900 | Put | Defined | 2026-08-14 | |
| 2026-06-30 | $16,111,697 | 54,177 | Shares | Defined | 2026-08-14 | |
| 2026-06-30 | $4,550,067 | 15,300 | Call | Defined | 2026-08-14 | |
| 2026-03-31 | $1,186,130 | 8,200 | Call | Defined | 2026-05-12 | |
| 2026-03-31 | $3,454,385 | 23,881 | Shares | Defined | 2026-05-12 | |
| 2025-12-31 | $273,504 | 2,200 | Call | Defined | 2026-02-12 | |
| 2025-12-31 | $2,836,360 | 22,815 | Shares | Defined | 2026-02-12 | |
| 2025-09-30 | $3,775,552 | 31,252 | Shares | Defined | 2025-11-14 | |
| 2025-06-30 | $1,528,903 | 19,263 | Shares | Defined | 2025-08-14 | |
| 2025-03-31 | $2,882,030 | 35,319 | Shares | Defined | 2025-05-19 | |
| 2024-12-31 | $2,410,594 | 24,379 | Shares | Defined | 2025-02-14 | |
| 2024-09-30 | $4,126,067 | 36,886 | Shares | Defined | 2024-11-15 | |
| 2024-06-30 | $3,693,611 | 34,159 | Shares | Defined | 2024-08-15 | |
| 2024-03-31 | $647,155 | 4,912 | Shares | Defined | 2024-05-16 | |
| 2023-12-31 | $1,390,959 | 10,689 | Shares | Defined | 2024-02-15 | |
| 2023-09-30 | $1,042,946 | 10,234 | Shares | Defined | 2023-11-15 | |
| 2023-06-30 | $914,742 | 8,010 | Shares | Defined | 2023-08-14 | |
| 2023-03-31 | $734,280 | 6,330 | Shares | Defined | 2023-05-16 | |
| 2022-06-30 | $668,583 | 9,068 | Shares | Defined | 2022-08-16 | |
| 2021-06-30 | $2,612,911 | 34,677 | Shares | Defined | 2021-08-16 | |
| 2021-03-31 | $987,770 | 14,912 | Shares | Defined | 2021-05-18 | |
| No filing history on record for this holder in this stock. | ||||||