Attached files

file filename
EX-32.1 - EX-32.1 - ALLEGHENY TECHNOLOGIES INCfy202010-k321.htm
10-K - 10-K - ALLEGHENY TECHNOLOGIES INCati-20201231.htm
EX-31.2 - EX-31.2 - ALLEGHENY TECHNOLOGIES INCfy202010-k312.htm
EX-31.1 - EX-31.1 - ALLEGHENY TECHNOLOGIES INCfy202010-k311.htm
EX-23.1 - EX-23.1 - ALLEGHENY TECHNOLOGIES INCfy202010k231.htm
EX-10.17 - EX-10.17 - ALLEGHENY TECHNOLOGIES INCfy202010k1017.htm
EX-10.16 - EX-10.16 - ALLEGHENY TECHNOLOGIES INCfy202010k1016.htm

Exhibit 21.1
SUBSIDIARIES OF THE REGISTRANT
The following lists the subsidiaries of Allegheny Technologies Incorporated, excluding those subsidiaries which, considered in the aggregate as a single subsidiary, do not constitute a significant subsidiary.
Name of SubsidiaryState or Country of Incorporation
ALC Funding CorporationDelaware
Allegheny Ludlum, LLCPennsylvania
ATI Flat Rolled Products Holdings LLCPennsylvania
ATI Ladish LLCWisconsin
ATI Operating Holdings, LLCDelaware
ATI Properties, Inc.Delaware
Shanghai STAL Precision Stainless Steel Company Limited (1)China
TDY Holdings, LLCDelaware
TDY Industries, LLCCalifornia

(1) Owned 60% by the registrant and 40% by China Baowu Steel Group Corporation Limited.