Position in ATI
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$90,074,650
+$31,904,987 QoQ
Shares Held
619,240
+22.2% QoQ
Ownership
0.454%
of shares outstanding
% of Portfolio
0.08%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
24 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in ATI Over Time
Shares Held
Position Value (USD)
Derivatives in ATI
reported options exposure · as of Mar 31, 2026CallValue
$741,846
CallShares
5,100
PutValue
$363,650
PutShares
2,500
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 Mar 31, 2026MILLENNIUM MANAGEMENT LLC holds $237,371,310 across 12 Metal Fabrication names. ATI ranks #1 (37.9% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ATI |
Ati Inc
This page
|
619,240 | $90,074,650 | |
| 2 | ESAB |
ESAB Corp
|
902,851 | $87,269,577 | |
| 3 | MLI |
Mueller Industries Inc
|
363,559 | $20,141,168 | |
| 4 | CMC |
COMMERCIAL METALS Co
|
175,798 | $10,799,271 | |
| 5 | CRS |
Carpenter Technology Corp
|
21,116 | $8,322,871 | |
| 6 | MEC |
Mayville Engineering Company, Inc.
|
380,972 | $6,838,447 | |
| 7 | RYZ |
Ryerson Holding Corp
|
184,202 | $4,140,860 | |
| 8 | WOR |
Worthington Enterprises, Inc.
|
54,590 | $2,846,322 |
All Filings in ATI
Export CSV
33 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $363,650 | 2,500 | Put | Sole | 2026-05-15 | |
| 2026-03-31 | $741,846 | 5,100 | Call | Sole | 2026-05-15 | |
| 2026-03-31 | $90,074,650 | 619,240 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $58,169,663 | 506,881 | Shares | Sole | 2026-02-17 | |
| 2025-12-31 | $1,216,456 | 10,600 | Call | Sole | 2026-02-17 | |
| 2025-12-31 | $562,324 | 4,900 | Put | Sole | 2026-02-17 | |
| 2025-09-30 | $27,459,651 | 337,591 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $24,936,459 | 288,817 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $71,076,153 | 1,366,061 | Shares | Sole | 2025-05-15 | |
| 2025-03-31 | $239,338 | 4,600 | Put | Sole | 2025-05-15 | |
| 2024-12-31 | $5,500,532 | 99,937 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $106,722,520 | 1,595,016 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $107,845,758 | 1,944,919 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $38,052,365 | 743,646 | Shares | Sole | 2024-05-15 | |
| 2024-03-31 | $511,700 | 10,000 | Put | Sole | 2024-05-15 | |
| 2023-12-31 | $12,178,821 | 267,843 | Shares | Sole | 2024-02-14 | |
| 2023-12-31 | $481,982 | 10,600 | Put | Sole | 2024-02-14 | |
| 2023-09-30 | $14,274,358 | 346,886 | Shares | Sole | 2023-11-14 | |
| 2023-09-30 | $1,292,110 | 31,400 | Put | Sole | 2023-11-14 | |
| 2023-06-30 | $23,297,312 | 526,731 | Shares | Sole | 2023-08-14 | |
| 2023-06-30 | $2,905,911 | 65,700 | Put | Sole | 2023-08-14 | |
| 2023-03-31 | $17,285,334 | 438,047 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $30,389,268 | 1,017,725 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $29,428,584 | 1,105,922 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $76,362,556 | 3,362,508 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $46,563,669 | 1,734,861 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $24,731,197 | 1,552,492 | Shares | Sole | 2022-02-14 | |
| 2021-09-30 | $27,988,755 | 1,683,028 | Shares | Sole | 2021-11-15 | |
| 2021-06-30 | $11,642,952 | 558,415 | Shares | Sole | 2021-08-16 | |
| 2021-03-31 | $14,820,069 | 703,707 | Shares | Sole | 2021-05-17 | |
| 2020-12-31 | $24,475,479 | 1,459,480 | Shares | Sole | 2021-02-16 | |
| 2020-06-30 | $4,507,210 | 442,317 | Shares | Sole | 2020-08-14 | |
| 2020-03-31 | $3,641,315 | 428,390 | Shares | Sole | 2020-05-14 | |
| No filing history on record for this holder in this stock. | ||||||