Fields Kimberly A plan to sell securities of ATI INC under Form 144

Fields Kimberly A filed Form 144 to notify SEC of plan to sell 3641 units of ATI INC securities around 2026-06-23, with aggregate market value of $719,024.68. The total outstanding units is 136470427.0. The amount planned to be sold represents 0.00% of total outstanding units; Recent transactions in past 3 months include: On 05/11/2026, sold 40000 units for $6368283.35; On 06/02/2026, sold 59749 units for $10699079.13; On 06/22/2026, sold 13269 units for $2686707.12;