Michael B. Miller - 02 Mar 2026 Form 4 Insider Report for ATI INC (ATI)

Reporting relationship: VP Chief Accounting Officer
Issuer ticker: ATI
Reported as of: 02 Mar 2026
Net transaction value: -$67,732
SEC form: 4
Accepted by SEC: 03 Mar 2026, 21:55:20 UTC
Prior SEC filing: 07 Jan 2026
Source filing: View source filing
Reporting owner signature: /s/ Amanda J. Skov, Attorney-in-Fact for Michael B. Miller

Key filing fact

Michael B. Miller filed Form 4 for ATI INC (ATI) on 03 Mar 2026.

Key facts

This page summarizes Michael B. Miller's Form 4 filing for ATI INC (ATI).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 03 Mar 2026, 21:55.

Change

Previous filing in this sequence was filed on 07 Jan 2026.
Current net transaction value: -$67,732.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001880164 Primary reporting owner

Miller Michael Benjamin

Relationship: VP Chief Accounting Officer
Address: C/O ATI INC., 2021 MCKINNEY AVENUE, SUITE 1100, DALLAS
Signature: /s/ Amanda J. Skov, Attorney-in-Fact for Michael B. Miller
Signature date: 03 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ATI transaction

Common Stock, par value $0.10 per share

Tax liability

Transaction value: $67,732
Shares: -413
Change %: -5.1%
Price: $164.00
Shares after: 7,639
Date: 02 Mar 2026
Ownership: Direct
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Shares withheld for the payment of taxes on restricted stock units awarded on March 1, 2024. One-third of such restricted stock units vested by their terms on March 1, 2026.

Footnote F2

Represents the average of the high and low trading prices of one share of the Issuer's Common Stock on the New York Stock Exchange on March 2, 2026.