Position in MEC
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$7,443,751
+$6,424,443 QoQ
Shares Held
198,712
+249.9% QoQ
Ownership
0.779%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#32
of 154 holders
Holding Since
Mar 2022
16 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in MEC Over Time
Shares Held
Position Value (USD)
Derivatives in MEC
reported options exposure · as of Jun 30, 2026CallValue
$1,603,288
CallShares
42,800
PutValue
$932,754
PutShares
24,900
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 Metal Fabrication
Industrials · as of Jun 30, 2026CITADEL ADVISORS LLC holds $144,667,777 across 12 Metal Fabrication names. MEC ranks #4 (5.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ATI |
Ati Inc
|
497,418 | $98,041,086 | |
| 2 | IIIN |
Insteel Industries Inc
|
411,992 | $12,442,157 | |
| 3 | CMC |
COMMERCIAL METALS Co
|
197,966 | $12,422,366 | |
| 4 | MEC |
Mayville Engineering Company, Inc.
This page
|
198,712 | $7,443,751 | |
| 5 | PRLB |
Proto Labs Inc
|
88,625 | $7,223,823 | |
| 6 | ESAB |
ESAB Corp
|
41,650 | $4,107,939 | |
| 7 | WOR |
Worthington Enterprises, Inc.
|
33,048 | $1,776,660 | |
| 8 | AP |
Ampco Pittsburgh Corp
|
51,409 | $444,687 |
All Filings in MEC
Export CSV
34 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $7,443,751 | 198,712 | Shares | Defined | 2026-08-14 | |
| 2026-06-30 | $1,603,288 | 42,800 | Call | Defined | 2026-08-14 | |
| 2026-06-30 | $932,754 | 24,900 | Put | Defined | 2026-08-14 | |
| 2026-03-31 | $1,019,308 | 56,786 | Shares | Defined | 2026-05-15 | |
| 2025-12-31 | $1,936,827 | 103,463 | Shares | Defined | 2026-02-17 | |
| 2025-06-30 | $255,184 | 15,989 | Shares | Defined | 2025-08-14 | |
| 2025-03-31 | $96,696 | 7,200 | Put | Defined | 2025-05-15 | |
| 2025-03-31 | $99,382 | 7,400 | Call | Defined | 2025-05-15 | |
| 2025-03-31 | $1,930,521 | 143,747 | Shares | Defined | 2025-05-15 | |
| 2024-12-31 | $195,415 | 12,431 | Shares | Defined | 2025-02-14 | |
| 2024-12-31 | $70,740 | 4,500 | Call | Defined | 2025-02-14 | |
| 2024-12-31 | $48,732 | 3,100 | Put | Defined | 2025-02-14 | |
| 2024-09-30 | $56,916 | 2,700 | Put | Defined | 2024-11-14 | |
| 2024-09-30 | $375,919 | 17,833 | Shares | Defined | 2024-11-14 | |
| 2024-09-30 | $48,484 | 2,300 | Call | Defined | 2024-11-14 | |
| 2024-06-30 | $272,173 | 16,337 | Shares | Defined | 2024-08-14 | |
| 2024-06-30 | $19,992 | 1,200 | Call | Defined | 2024-08-14 | |
| 2024-06-30 | $118,286 | 7,100 | Put | Defined | 2024-08-14 | |
| 2024-03-31 | $18,312 | 1,278 | Shares | Defined | 2024-05-15 | |
| 2024-03-31 | $190,589 | 13,300 | Put | Defined | 2024-05-15 | |
| 2024-03-31 | $32,959 | 2,300 | Call | Defined | 2024-05-15 | |
| 2023-12-31 | $374,920 | 26,000 | Call | Defined | 2024-02-14 | |
| 2023-12-31 | $99,498 | 6,900 | Put | Defined | 2024-02-14 | |
| 2023-09-30 | $388,073 | 35,376 | Shares | Defined | 2023-11-14 | |
| 2023-09-30 | $212,818 | 19,400 | Call | Defined | 2023-11-14 | |
| 2023-09-30 | $114,088 | 10,400 | Put | Defined | 2023-11-14 | |
| 2023-06-30 | $1,190,615 | 95,555 | Shares | Defined | 2023-08-14 | |
| 2023-06-30 | $183,162 | 14,700 | Call | Defined | 2023-08-14 | |
| 2023-06-30 | $39,872 | 3,200 | Put | Defined | 2023-08-14 | |
| 2023-03-31 | $11,936 | 800 | Call | Defined | 2023-05-15 | |
| 2023-03-31 | $303,233 | 20,324 | Shares | Defined | 2023-05-15 | |
| 2022-09-30 | $487,526 | 74,889 | Shares | Defined | 2022-11-14 | |
| 2022-06-30 | $783,829 | 101,270 | Shares | Defined | 2022-08-15 | |
| 2022-03-31 | $733,071 | 78,236 | Shares | Defined | 2022-05-16 | |
| No filing history on record for this holder in this stock. | ||||||