Position in MTRN
as of Mar 31, 2026
· filed May 12, 2026
Position Value
$9,286,963
+$1,418,751 QoQ
Shares Held
64,203
+1.4% QoQ
Ownership
0.309%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 50.08488699904989.ToString("F0")%
Shared 0.ToString("F0")%
None 49.915113000950114.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, 2026RHUMBLINE ADVISERS holds $38,370,842 across 25 Other Industrial Metals & Mining names. MTRN ranks #2 (24.2% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | MP |
MP Materials Corp. / DE
|
346,170 | $16,706,164 | |
| 2 | MTRN |
MATERION Corp
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|
64,203 | $9,286,963 | |
| 3 | USAR |
USA Rare Earth, Inc.
|
211,437 | $3,200,098 | |
| 4 | VALE |
Vale S.A.
|
123,701 | $1,968,082 | |
| 5 | RIO |
Rio Tinto PLC
|
16,036 | $1,495,998 | |
| 6 | BHP |
BHP Group Ltd
|
19,985 | $1,453,708 | |
| 7 | UAMY |
United States Antimony Corp
|
134,064 | $1,170,378 | |
| 8 | CMP |
Compass Minerals International Inc
|
40,993 | $957,186 |
All Filings in MTRN
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25 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $9,286,963 | 64,203 | Shares | Sole | 2026-05-12 | |
| 2025-12-31 | $7,868,212 | 63,290 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $8,264,491 | 68,409 | Shares | Sole | 2025-11-06 | |
| 2025-06-30 | $5,416,050 | 68,238 | Shares | Sole | 2025-08-12 | |
| 2025-03-31 | $5,343,168 | 65,480 | Shares | Sole | 2025-05-29 | |
| 2024-12-31 | $6,486,429 | 65,599 | Shares | Sole | 2025-05-29 | |
| 2024-09-30 | $7,029,058 | 62,838 | Shares | Sole | 2024-11-12 | |
| 2024-06-30 | $7,063,484 | 65,324 | Shares | Sole | 2024-08-01 | |
| 2024-03-31 | $8,548,203 | 64,882 | Shares | Sole | 2024-05-09 | |
| 2023-12-31 | $8,451,162 | 64,944 | Shares | Sole | 2024-02-08 | |
| 2023-09-30 | $6,835,205 | 67,071 | Shares | Sole | 2023-11-09 | |
| 2023-06-30 | $7,619,880 | 66,724 | Shares | Sole | 2023-08-08 | |
| 2023-03-31 | $7,827,796 | 67,481 | Shares | Sole | 2023-05-11 | |
| 2022-12-31 | $5,641,069 | 64,462 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $5,089,600 | 63,620 | Shares | Sole | 2022-11-10 | |
| 2022-06-30 | $4,495,318 | 60,970 | Shares | Sole | 2022-08-11 | |
| 2022-03-31 | $5,280,640 | 61,589 | Shares | Sole | 2022-05-12 | |
| 2021-12-31 | $5,520,445 | 60,044 | Shares | Sole | 2022-02-10 | |
| 2021-09-30 | $4,177,224 | 60,857 | Shares | Sole | 2021-11-12 | |
| 2021-06-30 | $5,181,819 | 68,770 | Shares | Sole | 2021-08-05 | |
| 2021-03-31 | $4,790,741 | 72,324 | Shares | Sole | 2021-05-06 | |
| 2020-12-31 | $4,560,058 | 71,564 | Shares | Sole | 2021-02-10 | |
| 2020-09-30 | $3,490,328 | 67,083 | Shares | Sole | 2020-11-12 | |
| 2020-06-30 | $4,466,818 | 72,643 | Shares | Sole | 2020-08-13 | |
| 2020-03-31 | $2,745,099 | 78,409 | Shares | Sole | 2020-05-06 | |
| No filing history on record for this holder in this stock. | ||||||