Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0001628280-26-010140
Filing Date
2026-02-20
Accepted
2026-02-20 15:06:01
Documents
157
Period of Report
2025-12-28

Document Format Files

Seq Description Document Type Size
1 10-K ati-20251228.htm   iXBRL 10-K 3246002
2 EX-10.16 fy202510-k1016.htm EX-10.16 86886
3 EX-10.17 fy202510-k1017.htm EX-10.17 117475
4 EX-10.18 fy202510-k1018.htm EX-10.18 62977
5 EX-19.1 fy202510-k191.htm EX-19.1 63863
6 EX-21.1 fy202510k211.htm EX-21.1 5971
7 EX-23.1 fy202510k231.htm EX-23.1 4980
8 EX-31.1 fy202510-k311.htm EX-31.1 9103
9 EX-31.2 fy202510-k312.htm EX-31.2 9338
10 EX-32.1 fy202510-k321.htm EX-32.1 8742
16 ati-20251228_g1.jpg GRAPHIC 98466
  Complete submission text file 0001628280-26-010140.txt   19994028

Data Files

Seq Description Document Type Size
11 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT ati-20251228.xsd EX-101.SCH 121961
12 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT ati-20251228_cal.xml EX-101.CAL 160582
13 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT ati-20251228_def.xml EX-101.DEF 693474
14 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT ati-20251228_lab.xml EX-101.LAB 1381368
15 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT ati-20251228_pre.xml EX-101.PRE 1089786
160 EXTRACTED XBRL INSTANCE DOCUMENT ati-20251228_htm.xml XML 3811250
Mailing Address 2021 MCKINNEY AVENUE DALLAS TX 75201
Business Address 2021 MCKINNEY AVENUE DALLAS TX 75201 4123942800
ATI INC (Filer) CIK: 0001018963 (see all company filings)

EIN.: 251792394 | State of Incorp.: DE | Fiscal Year End: 1228
Type: 10-K | Act: 34 | File No.: 001-12001 | Film No.: 26659106
SIC: 3317 Steel Pipe & Tubes
(CF Office: 04 Manufacturing)