Insider Transactions Reported by 25 Insiders of ATI INC

Symbol: ATI on NYSE
Location: Dallas, TX

Key facts

ATI - ATI INC has 25 insiders with reported activity on this page.
Net insider value flow over the last year: -$42,228,608.
Recent transaction rows are available for direct filing-level review.

Change

Buy value: $4,875,188; sell value: $47,103,795.
Net share flow: -438,093.

Research use

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Evidence

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

Net insider flow leans to selling over the last 12 months. Net value: -$42,228,608.

Buys

$4,875,188

Shares: 34,882

Insiders: 1

Sells

$47,103,796

Shares: 472,975

Insiders: 5

Net

-$42,228,608

Shares: -438,093

Insiders: -4

Window (months)	Buy shares	Sell shares	Buy $	Sell $	Net $
0-3	0	46,609	$0	$7,387,702	-$7,387,702
3-6	34,882	95,680	$4,875,188	$11,470,460	-$6,595,271
6-9	0	172,786	$0	$15,635,027	-$15,635,027
9-12	0	157,900	$0	$12,610,607	-$12,610,607

ATI INC executives and other stock owners filed with the SEC include:

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
Kimberly A. Fields	President, CEO and Director, Director	$44,753,174	-$12,787,318	-22%	Filing P/S	11 May 2026
Robert S. Wetherbee	Executive Chairman, Director	$39,545,655	-$23,475,262	-37%	Filing P/S	17 Feb 2026
Donald P. Newman	EVP and CFO	$22,208,825			Mixed	03 Jan 2025
Timothy J. Harris	Senior VP and CDIO	$19,758,681	-$4,105,354	-17%	Mixed	05 Jan 2026
Carolyn Corvi	Director	$13,717,747			Mixed	19 May 2026
J. Brett Harvey	Director	$9,973,867			Mixed	20 May 2025
Vaishali S. Bhatia	SVP, General Counsel and CCO	$9,554,591			Mixed	20 Mar 2026
Herbert J. Carlisle	Director	$7,181,899			Mixed	19 May 2026
Elizabeth C. Powers	Senior VP, CHRO	$7,112,012			Mixed	28 Feb 2022
James Robert Foster	SVP, Finance and CFO	$7,021,065			Mixed	05 Jan 2026
Kevin B. Kramer	Sr. VP, CCMO	$6,804,763			Mixed	14 Apr 2022
Marianne Kah	Director	$6,699,146			Mixed	19 May 2026
David P. Hess	Director	$6,582,782			Mixed	19 May 2026
Elliot S. Davis	Chief Legal & Compl. Officer	$6,087,277			Filing P/S	29 Feb 2024
David J. Morehouse	Director	$5,572,718	-$1,618,384	-23%	Median	19 May 2026
Leroy M. Ball Jr.	Director	$5,052,844			Median	19 May 2026
Karl D. Schwartz	VP, Controller & CAO	$2,666,630			Mixed	12 Sep 2022
Tina K. Busch	Svp, Chro	$1,984,013	-$242,289	-11%	Filing P/S	21 Nov 2025
James C. Diggs	Director	$1,977,314			Mixed	08 Sep 2023
Ruby Sharma	Director	$1,291,768			Mixed	19 May 2026
Michael B. Miller	VP Chief Accounting Officer	$1,252,796			Mixed	02 Mar 2026
Jimmy Williams Jr.	Svp, Cto	$648,512			Mixed	03 Jan 2025
Netta Washington	Evp, Hpmc	$584,233			Mixed	01 May 2024
Elizabeth H. Lund	Director	$223,426			Median	19 May 2026
Jean Lydon-Rodgers	Director	$223,426			Median	19 May 2026

Top shareholders of ATI INC (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
BlackRock, Inc.	13F 13D/G	Company	10% from 13D/G	16,441,653	$2,391,602,818	—	31 Mar 2026	13F 13D/G
VANGUARD CAPITAL MANAGEMENT LLC	13D/G 13F	Vanguard Capital Management · Company	5.2%	7,145,445	$1,039,376,430	$0	31 Mar 2026	13D/G 13F
Capital International Investors	13D/G 13F	Company	4.5%	6,169,480	$897,410,093	-$1,668,273,680	31 Mar 2026	13D/G 13F
Capital World Investors	13D/G 13F	Company	4.2%	5,719,812	$936,790,809	-$358,563,063	31 Mar 2026	13D/G 13F
FMR LLC	13F 13D/G	Company	3.5% from 13D/G	5,247,175	$763,254,091	—	31 Mar 2026	13F 13D/G
David J. Morehouse	3/4/5	Director	0.03%	38,311	$5,572,718	-$1,618,384	19 May 2026	3/4/5
Leroy M. Ball Jr.	3/4/5	Director	0.03%	34,737	$5,052,844	—	19 May 2026	3/4/5
Tina K. Busch	3/4/5	SVP, CHRO	0.02%	21,274	$1,984,013	-$242,289	21 Nov 2025	3/4/5
Elizabeth H. Lund	3/4/5	Director	0%	1,536	$223,426	—	19 May 2026	3/4/5
Jean Lydon-Rodgers	3/4/5	Director	0%	1,536	$223,426	—	19 May 2026	3/4/5
Capital Research Global Investors	13F	Company	4.5%	6,160,107	$895,961,750	—	31 Mar 2026	13F
VANGUARD PORTFOLIO MANAGEMENT LLC	13F	Company	4.3%	5,821,508	$846,796,554	—	31 Mar 2026	13F
STATE STREET CORP	13F	Company	4%	5,381,013	$782,722,151	—	31 Mar 2026	13F
Invesco Ltd.	13F	Company	2.8%	3,855,643	$560,841,879	—	31 Mar 2026	13F
VIKING GLOBAL INVESTORS LP	13F	Company	2.4%	3,332,843	$484,795,343	—	31 Mar 2026	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	2.2%	2,947,325	$428,807,254	—	31 Mar 2026	13F
Point72 Asset Management, L.P.	13F	Company	1.4%	1,932,579	$281,112,941	—	31 Mar 2026	13F
D. E. Shaw & Co., Inc.	13F	Company	1.3%	1,742,609	$253,479,905	—	31 Mar 2026	13F
MORGAN STANLEY	13F	Company	1.2%	1,668,591	$242,713,664	—	31 Mar 2026	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	1.1%	1,502,129	$218,499,684	—	31 Mar 2026	13F
JANE STREET GROUP, LLC	13F	Company	1.1%	1,491,263	$216,919,115	—	31 Mar 2026	13F
UBS Group AG	13F	Company	1%	1,419,080	$206,419,377	—	31 Mar 2026	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	1%	1,366,804	$198,718,554	—	31 Mar 2026	13F
BANK OF AMERICA CORP /DE/	13F	Company	1%	1,364,941	$198,544,318	—	31 Mar 2026	13F
DENDUR CAPITAL LP	13F	Company	0.94%	1,283,103	$186,640,162	—	31 Mar 2026	13F
NORTHERN TRUST CORP	13F	Company	0.91%	1,239,020	$180,227,849	—	31 Mar 2026	13F
AQR CAPITAL MANAGEMENT LLC	13F	Company	0.9%	1,222,580	$174,132,098	—	31 Mar 2026	13F
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	13F	Company	0.88%	1,203,726	$175,093,984	—	31 Mar 2026	13F
Holocene Advisors, LP	13F	Company	0.81%	1,097,588	$159,655,150	—	31 Mar 2026	13F
SG Americas Securities, LLC	13F	Company	0.79%	1,075,368	$156,423,000	—	31 Mar 2026	13F
AMERICAN CENTURY COMPANIES INC	13F	Company	0.79%	1,069,282	$155,538,135	—	31 Mar 2026	13F
BOWEN HANES & CO INC	13F	Company	0.77%	1,043,105	$151,730,053	—	31 Mar 2026	13F
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	13F	Company	0.76%	1,032,774	$150,213,382	—	31 Mar 2026	13F
AMERIPRISE FINANCIAL INC	13F	Company	0.73%	998,834	$145,290,393	—	31 Mar 2026	13F
Fisher Asset Management, LLC	13F	Company	0.68%	924,521	$134,480,823	—	31 Mar 2026	13F
Bank of New York Mellon Corp	13F	Company	0.64%	869,184	$126,431,536	—	31 Mar 2026	13F
Qube Research & Technologies Ltd	13F	Company	0.63%	858,818	$124,923,666	—	31 Mar 2026	13F
BALYASNY ASSET MANAGEMENT L.P.	13F	Company	0.63%	851,664	$123,883,045	—	31 Mar 2026	13F
VANGUARD FIDUCIARY TRUST CO	13F	Company	0.62%	844,377	$122,823,078	—	31 Mar 2026	13F
PNC FINANCIAL SERVICES GROUP, INC.	13F	Company	0.61%	831,736	$120,984,318	—	31 Mar 2026	13F
PRUDENTIAL FINANCIAL INC	13F	Company	0.59%	809,970	$117,818,236	—	31 Mar 2026	13F
BARROW HANLEY MEWHINNEY & STRAUSS LLC	13F	Company	0.57%	782,466	$113,817,504	—	31 Mar 2026	13F
Artemis Investment Management LLP	13F	Company	0.53%	721,505	$104,950,117	—	31 Mar 2026	13F
FRONTIER CAPITAL MANAGEMENT CO LLC	13F	Company	0.51%	694,422	$101,010,604	—	31 Mar 2026	13F
LOOMIS SAYLES & CO L P	13F	Company	0.48%	653,416	$95,045,892	—	31 Mar 2026	13F
BNP PARIBAS FINANCIAL MARKETS	13F	Company	0.48%	651,996	$94,839,338	—	31 Mar 2026	13F
RAYMOND JAMES FINANCIAL INC	13F	Company	0.47%	638,706	$92,492,286	—	31 Mar 2026	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.45%	619,240	$90,074,650	—	31 Mar 2026	13F
Assenagon Asset Management S.A.	13F	Company	0.43%	584,030	$84,953,004	—	31 Mar 2026	13F
Nuveen, LLC	13F	Company	0.42%	578,616	$84,165,484	—	31 Mar 2026	13F

Recent Insider Transactions by Companies or Individuals for ATI INC

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Value $	* Price $	Shares	Shares Owned	Date	Ownership
Ruby Sharma	ATI	Common Stock, par value $0.10 per share	Award	14.2%			905	7,285	19 May 2026	Direct
David J. Morehouse	ATI	Common Stock, par value $0.10 per share	Award	4.77%			1,743	38,311	19 May 2026	Direct
Jean Lydon-Rodgers	ATI	Common Stock, par value $0.10 per share	Award	143.4%			905	1,536	19 May 2026	Direct
Elizabeth H. Lund	ATI	Common Stock, par value $0.10 per share	Award	143.4%			905	1,536	19 May 2026	Direct
Marianne Kah	ATI	Common Stock, par value $0.10 per share	Award	2.65%			905	35,075	19 May 2026	Direct
David P. Hess	ATI	Common Stock, par value $0.10 per share	Award	2.66%			905	34,945	19 May 2026	Direct
Carolyn Corvi	ATI	Common Stock, par value $0.10 per share	Award	1.29%			905	71,146	19 May 2026	Direct
Herbert J. Carlisle	ATI	Common Stock, par value $0.10 per share	Award	2.47%			905	37,556	19 May 2026	Direct
Leroy M. Ball Jr.	ATI	Common Stock, par value $0.10 per share	Award	2.67%			905	34,737	19 May 2026	Direct
Kimberly A. Fields	ATI	Common Stock, par value $0.10 per share	Sale	-12.6%	$6,368,238	$159.21	-40,000	277,763	11 May 2026	Direct
Vaishali S. Bhatia	ATI	Common Stock, par value $0.10 per share	Tax liability	-5.67%			-3,509	58,420	20 Mar 2026	Direct
David J. Morehouse	ATI	Common Stock, par value $0.10 per share	Sale	-14.8%	$1,019,464	$154.25	-6,609	38,168	09 Mar 2026	Direct
Michael B. Miller	ATI	Common Stock, par value $0.10 per share	Tax liability	-5.13%			-413	7,639	02 Mar 2026	Direct
Leroy M. Ball Jr.	ATI	Common Stock, par value $0.10 per share	Gift	-1.02%			-350	33,832	17 Feb 2026	Direct
Robert S. Wetherbee	ATI	Common Stock, par value $0.10 per share	Sale	11.4%	$4,195,715	$146.07	28,724	280,061	17 Feb 2026	Direct
Robert S. Wetherbee	ATI	Common Stock, par value $0.10 per share	Sale	-6.32%	$3,010,628	$144.48	-20,838	308,785	17 Feb 2026	Direct
Robert S. Wetherbee	ATI	Common Stock, par value $0.10 per share	Sale	-3.73%	$1,530,941	$146.67	-10,438	269,623	10 Feb 2026	Direct
James Robert Foster	ATI	Common Stock, par value $0.10 per share	Tax liability	-29.4%			-23,544	56,561	05 Jan 2026	Direct
James Robert Foster	ATI	Common Stock, par value $0.10 per share	Options Exercise	129.1%			42,265	75,014	05 Jan 2026	Direct
James Robert Foster	ATI	Common Stock, par value $0.10 per share	Award	18%			9,644	63,078	05 Jan 2026	Direct
James Robert Foster	ATI	Performance Stock Unit	Options Exercise	-50%			-25,641	25,641	05 Jan 2026	Direct
Robert S. Wetherbee	ATI	Common Stock, par value $0.10 per share	Award	63.2%			185,276	478,551	05 Jan 2026	Direct
Robert S. Wetherbee	ATI	Common Stock, par value $0.10 per share	Tax liability	-35%			-158,297	293,275	05 Jan 2026	Direct
Robert S. Wetherbee	ATI	Common Stock, par value $0.10 per share	Options Exercise				362,644	186,538	05 Jan 2026	Direct
Robert S. Wetherbee	ATI	Performance Stock Unit	Options Exercise	-50%			-64,103	64,102	05 Jan 2026	Direct
Michael B. Miller	ATI	Common Stock, par value $0.10 per share	Tax liability	-4.44%			-374	8,052	05 Jan 2026	Direct
Michael B. Miller	ATI	Common Stock, par value $0.10 per share	Award	11.3%			854	8,426	05 Jan 2026	Direct
Kimberly A. Fields	ATI	Common Stock, par value $0.10 per share	Tax liability	-22.2%			-78,251	274,927	05 Jan 2026	Direct
Kimberly A. Fields	ATI	Common Stock, par value $0.10 per share	Options Exercise	45.8%			98,620	313,798	05 Jan 2026	Direct
Kimberly A. Fields	ATI	Common Stock, par value $0.10 per share	Award	36.1%			94,726	357,143	05 Jan 2026	Direct
Kimberly A. Fields	ATI	Performance Stock Unit	Options Exercise	-50%			-35,898	35,897	05 Jan 2026	Direct
Timothy J. Harris	ATI	Common Stock, par value $0.10 per share	Tax liability	-28%			-54,560	140,511	05 Jan 2026	Direct
Timothy J. Harris	ATI	Common Stock, par value $0.10 per share	Options Exercise	69.8%			70,442	171,429	05 Jan 2026	Direct
Timothy J. Harris	ATI	Common Stock, par value $0.10 per share	Award	35.6%			48,995	186,829	05 Jan 2026	Direct
Timothy J. Harris	ATI	Performance Stock Unit	Options Exercise	-50%			-25,641	25,641	05 Jan 2026	Direct
Vaishali S. Bhatia	ATI	Common Stock, par value $0.10 per share	Tax liability	-3.04%			-1,944	61,929	05 Jan 2026	Direct
Vaishali S. Bhatia	ATI	Common Stock, par value $0.10 per share	Award	5.19%			3,152	63,873	05 Jan 2026	Direct
Robert S. Wetherbee	ATI	Common Stock, par value $0.10 per share	Sale	5.12%	$679,474	$110.34	6,158	126,518	18 Dec 2025	Direct
Robert S. Wetherbee	ATI	Common Stock, par value $0.10 per share	Sale	-28.9%	$5,897,039	$109.48	-53,862	132,676	18 Dec 2025	Direct
Kimberly A. Fields	ATI	Performance Stock Unit	Award				34,188	34,188	05 Dec 2025	Direct
Vaishali S. Bhatia	ATI	Performance Stock Unit	Award				6,837	6,837	05 Dec 2025	Direct
Timothy J. Harris	ATI	Performance Stock Unit	Award				6,837	6,837	05 Dec 2025	Direct
Michael B. Miller	ATI	Performance Stock Unit	Award				1,709	1,709	05 Dec 2025	Direct
Timothy J. Harris	ATI	Common Stock, par value $0.10 per share	Sale	-9.68%	$1,031,851	$97.88	-10,542	98,310	25 Nov 2025	Direct
Tina K. Busch	ATI	Common Stock, par value $0.10 per share	Sale	-10.9%	$242,289	$93.26	-2,598	21,274	21 Nov 2025	Direct
Leroy M. Ball Jr.	ATI	Common Stock, par value $0.10 per share	Gift	-0.54%			-185	34,182	19 Nov 2025	Direct
Jean Lydon-Rodgers	ATI	Common Stock, par value $0.10 per share	Award				631	631	19 Nov 2025	Direct
Elizabeth H. Lund	ATI	Common Stock, par value $0.10 per share	Award				631	631	19 Nov 2025	Direct
Robert S. Wetherbee	ATI	Common Stock, par value $0.10 per share	Sale	-19.6%	$5,900,155	$98.34	-60,000	246,538	18 Nov 2025	Direct
Timothy J. Harris	ATI	Common Stock, par value $0.10 per share	Sale	-8.83%	$1,030,691	$97.77	-10,542	108,852	18 Nov 2025	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.