ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
Position in MEC — Mayville Engineering Company, Inc.
CIK 1164508
BOSTON, MA
Position in MEC
as of Mar 31, 2026
· filed May 14, 2026
Position Value
$3,325,434
-$2,074,350 QoQ
Shares Held
185,261
-35.8% QoQ
Ownership
0.727%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2021
17 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in MEC Over Time
Shares Held
Position Value (USD)
Position in Metal Fabrication
Industrials · as of Jun 30, 2026ARROWSTREET CAPITAL, LIMITED PARTNERSHIP holds $399,369,843 across 7 Metal Fabrication names.
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | MLI |
Mueller Industries Inc
|
2,856,474 | $175,573,174 | |
| 2 | ATI |
Ati Inc
|
839,786 | $165,521,820 | |
| 3 | PRLB |
Proto Labs Inc
|
440,816 | $35,930,912 | |
| 4 | WOR |
Worthington Enterprises, Inc.
|
260,050 | $13,980,288 | |
| 5 | RYZ |
Ryerson Holding Corp
|
156,985 | $3,863,400 | |
| 6 | IIIN |
Insteel Industries Inc
|
89,603 | $2,706,010 | |
| 7 | TG |
Tredegar Corp
|
225,407 | $1,794,239 |
All Filings in MEC
Export CSV
17 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $3,325,434 | 185,261 | Shares | Defined | 2026-05-14 | |
| 2025-12-31 | $5,399,784 | 288,450 | Shares | Defined | 2026-02-13 | |
| 2025-09-30 | $3,696,417 | 268,635 | Shares | Defined | 2025-11-13 | |
| 2025-06-30 | $4,287,414 | 268,635 | Shares | Defined | 2025-08-13 | |
| 2025-03-31 | $3,577,752 | 266,400 | Shares | Defined | 2025-05-14 | |
| 2024-12-31 | $3,967,665 | 252,396 | Shares | Defined | 2025-02-12 | |
| 2024-09-30 | $3,615,030 | 171,491 | Shares | Defined | 2024-11-14 | |
| 2024-06-30 | $541,033 | 32,475 | Shares | Defined | 2024-08-14 | |
| 2023-09-30 | $125,650 | 11,454 | Shares | Defined | 2023-11-14 | |
| 2023-06-30 | $574,916 | 46,141 | Shares | Defined | 2023-08-14 | |
| 2023-03-31 | $1,037,924 | 69,566 | Shares | Defined | 2023-05-15 | |
| 2022-12-31 | $462,938 | 36,567 | Shares | Defined | 2023-02-14 | |
| 2022-03-31 | $389,941 | 41,616 | Shares | Defined | 2022-05-13 | |
| 2021-12-31 | $1,217,431 | 81,652 | Shares | Defined | 2022-02-14 | |
| 2021-09-30 | $761,494 | 40,505 | Shares | Defined | 2021-11-12 | |
| 2021-06-30 | $847,033 | 42,120 | Shares | Defined | 2021-08-13 | |
| 2021-03-31 | $237,514 | 16,517 | Shares | Defined | 2021-05-14 | |
| No filing history on record for this holder in this stock. | ||||||