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ATI Inc. planned insider sales

In the twelve months since 9 October 2025 insiders at ATI Inc. filed 28 Form 144 notices of planned sales, 761,037 shares worth $117.9 million at the time of filing, from 6 sellers. The latest, filed 21 September 2026: Harris Timothy J (officer), 9,000 shares worth $1.7 million, planned for around 21 September 2026 through Fidelity Brokerage Services LLC.

FiledSellerRelationshipSharesValuePlanned saleBrokerHow acquiredFiling
21 September 2026Harris Timothy JOfficer9,000$1.7 million21 September 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
14 September 2026Harris Timothy JOfficer16,500$3.2 million14 September 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
8 September 2026Harris Timothy JOfficer16,500$3.4 million8 September 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
2 September 2026Morehouse David JDirector2,485$501,0032 September 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
31 August 2026Harris Timothy JOfficer16,500$3.5 million31 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
24 August 2026Harris Timothy JOfficer16,500$3.4 million24 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
17 August 2026Fields Kimberly AOfficer, Director34,823$8.0 million17 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
10 August 2026Wetherbee Robert SFormer Officer & Director43,500$10.0 million10 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
28 July 2026Fields Kimberly AOfficer, Director31,757$6.1 million28 July 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
7 July 2026Fields Kimberly AOfficer, Director40,000$7.5 million7 July 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
24 June 2026Fields Kimberly AOfficer, Director3,783$746,04524 June 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
23 June 2026Fields Kimberly AOfficer, Director3,641$719,02523 June 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
22 June 2026Fields Kimberly AOfficer, Director13,269$2.7 million22 June 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
2 June 2026J. Brett Harveyfmr Director40,500$7.2 million2 June 2026Goldman Sachs & Co. LLCRestricted Stock UnitsForm 144
2 June 2026Fields Kimberly AOfficer, Director59,749$10.6 million2 June 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
11 May 2026Fields Kimberly AOfficer, Director40,000$6.2 million11 May 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
11 March 2026Morehouse David JDirector6,609$1.0 million9 March 2026Morgan StanleyRestricted stock vestingForm 144
17 February 2026Wetherbee Robert SOfficer, Director60,000$8.6 million17 February 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
10 February 2026Wetherbee Robert SOfficer, Director60,000$8.2 million10 February 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
18 December 2025Wetherbee Robert SOfficer, Director60,000$6.6 million18 December 2025Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
2 December 2025Wetherbee Robert SOfficer, Director60,000$6.0 million2 December 2025Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
25 November 2025Harris Timothy JOfficer10,542$1.0 million25 November 2025Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
21 November 2025Busch Tina KilloughOfficer2,598$242,28921 November 2025Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
18 November 2025Harris Timothy JOfficer10,542$1.0 million18 November 2025Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
18 November 2025Wetherbee Robert SOfficer, Director60,000$5.9 million18 November 2025Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
12 November 2025Harris Timothy JOfficer10,543$1.0 million11 November 2025Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
4 November 2025Harris Timothy JOfficer10,543$1.0 million4 November 2025Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
15 October 2025Fields Kimberly AOfficer, Director21,153$1.8 million15 October 2025Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
A Form 144 is the notice an insider files with the SEC before selling restricted or control shares over the Rule 144 thresholds; it says what may be sold, not what was.
Read moreValue is the filer's own aggregate market value. Whether the sale happened shows up later on Form 4, on the insiders page.

Source

Form 144 filings on EDGAR for ATI Inc.: the company's filing index, each notice read from its own XML.

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