Position in MTRN
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$127,680,240
+$62,862,776 QoQ
Shares Held
882,684
+69.3% QoQ
Ownership
4.24%
of shares outstanding
% of Portfolio
0.07%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
20 quarters on record
Voting authority
Sole 94.78782893991507.ToString("F0")%
Shared 5.2121710600849225.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, 2026AMERICAN CENTURY COMPANIES INC holds $498,509,915 across 16 Other Industrial Metals & Mining names. MTRN ranks #2 (25.6% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VALE |
Vale S.A.
|
8,745,416 | $139,139,568 | |
| 2 | MTRN |
MATERION Corp
This page
|
882,684 | $127,680,240 | |
| 3 | BHP |
BHP Group Ltd
|
1,315,675 | $95,702,199 | |
| 4 | RIO |
Rio Tinto PLC
|
595,530 | $55,556,993 | |
| 5 | CMP |
Compass Minerals International Inc
|
1,678,675 | $39,197,061 | |
| 6 | TECK |
Teck Resources Ltd
|
295,400 | $15,286,950 | |
| 7 | MP |
MP Materials Corp. / DE
|
314,696 | $15,187,228 | |
| 8 | GSM |
Ferroglobe PLC
|
1,790,180 | $7,375,541 |
All Filings in MTRN
Export CSV
20 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $127,680,240 | 882,684 | Shares | Defined | 2026-05-15 | |
| 2025-12-31 | $64,817,464 | 521,376 | Shares | Defined | 2026-02-13 | |
| 2025-09-30 | $44,121,261 | 365,212 | Shares | Defined | 2025-11-12 | |
| 2025-06-30 | $18,923,236 | 238,418 | Shares | Defined | 2025-08-12 | |
| 2025-03-31 | $6,037,176 | 73,985 | Shares | Defined | 2025-05-13 | |
| 2024-12-31 | $3,630,576 | 36,717 | Shares | Defined | 2025-02-11 | |
| 2024-09-30 | $4,099,109 | 36,645 | Shares | Defined | 2024-11-12 | |
| 2024-06-30 | $3,683,772 | 34,068 | Shares | Defined | 2024-08-07 | |
| 2024-03-31 | $3,925,359 | 29,794 | Shares | Defined | 2024-05-14 | |
| 2023-12-31 | $3,362,949 | 25,843 | Shares | Defined | 2024-02-13 | |
| 2023-06-30 | $1,317,982 | 11,541 | Shares | Defined | 2023-08-14 | |
| 2023-03-31 | $466,784 | 4,024 | Shares | Defined | 2023-05-11 | |
| 2022-03-31 | $392,346 | 4,576 | Shares | Defined | 2022-05-11 | |
| 2021-09-30 | $809,334 | 11,791 | Shares | Defined | 2021-11-10 | |
| 2021-06-30 | $977,440 | 12,972 | Shares | Defined | 2021-08-05 | |
| 2021-03-31 | $840,850 | 12,694 | Shares | Defined | 2021-05-14 | |
| 2020-12-31 | $740,936 | 11,628 | Shares | Defined | 2021-02-12 | |
| 2020-09-30 | $598,865 | 11,510 | Shares | Defined | 2020-11-13 | |
| 2020-06-30 | $867,992 | 14,116 | Shares | Defined | 2020-08-13 | |
| 2020-03-31 | $1,068,645 | 30,524 | Shares | Defined | 2020-05-14 | |
| No filing history on record for this holder in this stock. | ||||||