Position in MTRN
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$2,258,379
+$1,640,579 QoQ
Shares Held
7,594
+77.8% QoQ
Ownership
0.036%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#135
of 400 holders
Holding Since
Jun 2022
16 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, 2026STATE OF WISCONSIN INVESTMENT BOARD holds $16,446,919 across 10 Other Industrial Metals & Mining names. MTRN ranks #3 (13.7% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | CMP |
Compass Minerals International Inc
|
191,325 | $5,955,947 | |
| 2 | MP |
MP Materials Corp. / DE
|
101,219 | $5,669,276 | |
| 3 | MTRN |
MATERION Corp
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|
7,594 | $2,258,379 | |
| 4 | USAR |
USA Rare Earth, Inc.
|
68,151 | $1,470,698 | |
| 5 | UAMY |
United States Antimony Corp
|
72,737 | $528,070 | |
| 6 | CRML |
Critical Metals Corp.
|
19,500 | $199,875 | |
| 7 | TMC |
TMC the metals Co Inc.
|
29,184 | $129,285 | |
| 8 | NB |
Niocorp Developments Ltd
|
20,797 | $100,241 |
All Filings in MTRN
Export CSV
16 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $2,258,379 | 7,594 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $617,800 | 4,271 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $430,147 | 3,460 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $470,071 | 3,891 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $413,358 | 5,208 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $494,414 | 6,059 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $517,537 | 5,234 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $488,604 | 4,368 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $450,685 | 4,168 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $650,054 | 4,934 | Shares | Sole | 2024-05-14 | |
| 2023-12-31 | $254,534 | 1,956 | Shares | Sole | 2024-02-12 | |
| 2023-09-30 | $575,791 | 5,650 | Shares | Sole | 2023-11-14 | |
| 2023-03-31 | $299,860 | 2,585 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $223,763 | 2,557 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $305,760 | 3,822 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $381,700 | 5,177 | Shares | Sole | 2022-08-15 | |
| No filing history on record for this holder in this stock. | ||||||