ATI CEO sells 40,000 shares under 10b5-1 plan

ATI Inc. director and Chair, President and CEO Kimberly A. Fields reported open-market sales of a total of 40,000 shares of common stock on July 7, 2026.

Rhea-AI Filing Summary

ATI Inc. director and Chair, President and CEO Kimberly A. Fields reported open-market sales of a total of 40,000 shares of common stock on July 7, 2026. The transactions were executed under a Rule 10b5-1 Trading Plan entered into on February 5, 2026 for personal tax and estate planning purposes.

The shares were sold in ten tranches at weighted average prices, with individual trades occurring in ranges from $178.71 to $185.02 per share. All reported sales involve directly held common stock and reflect a pre-planned, systematic disposition rather than a discretionary one-time trade.

Insider Trade Summary 10b5-1

Net Seller: 40,000 shares

Net Sell 10 txns

Insider Fields Kimberly A

Role Chair, President and CEO

Sold 40,000 shs ($7.32M)

Type	Security	Shares	Price	Value
Sale	Common Stock, par value $0.10 per share	2,000	$179.25	$359K
Sale	Common Stock, par value $0.10 per share	2,000	$180.00	$360K
Sale	Common Stock, par value $0.10 per share	200	$180.85	$36K
Sale	Common Stock, par value $0.10 per share	2,200	$181.36	$399K
Sale	Common Stock, par value $0.10 per share	11,826	$182.66	$2.16M
Sale	Common Stock, par value $0.10 per share	15,908	$183.50	$2.92M
Sale	Common Stock, par value $0.10 per share	4,878	$184.34	$899K
Sale	Common Stock, par value $0.10 per share	388	$185.10	$72K
Sale	Common Stock, par value $0.10 per share	200	$186.36	$37K
Sale	Common Stock, par value $0.10 per share	400	$187.50	$75K

Holdings After Transaction: Common Stock, par value $0.10 per share — 157,321 shares (Direct)

Footnotes (8)

1. F1. Shares sold pursuant to a 10b5-1 Trading Plan dated February 5, 2026, entered into for personal tax and estate planning purposes.
2. F2. The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $178.71 to $179.70. The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the U.S. Securities and Exchange Commission (the "SEC"), upon request, full information regarding the number of shares sold at each specific price within the range reported.
3. F3. The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $179.77 to $180.39. The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the SEC, upon request, full information regarding the number of shares sold at each specific price within the range reported.
4. F4. The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $180.83 to $181.87. The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the SEC, upon request, full information regarding the number of shares sold at each specific price within the range reported.
5. F5. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $181.01 to $181.95. The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the SEC, upon request, full information regarding the number of shares sold at each specific price within the range reported.
6. F6. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $182.06 to $183.01. The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the SEC, upon request, full information regarding the number of shares sold at each specific price within the range reported.
7. F7. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $183.07 to 184.06. The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the SEC, upon request, full information regarding the number of shares sold at each specific price within the range reported.
8. F8. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $184.07 to 185.02. The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the SEC, upon request, full information regarding the number of shares sold at each specific price within the range reported.

Key Figures

Shares sold: 40,000 shares Number of sale transactions: 10 transactions Lowest sale price range: $178.71–$179.70 per share +3 more

6 metrics

Shares sold 40,000 shares Total ATI common stock sold by CEO on July 7, 2026

Number of sale transactions 10 transactions Open-market sales of ATI common stock on July 7, 2026

Lowest sale price range $178.71–$179.70 per share Price range for one weighted-average tranche of ATI share sales

Highest sale price range $184.07–$185.02 per share Price range for a reported weighted-average tranche of sales

Trading plan date February 5, 2026 Date of Rule 10b5-1 Trading Plan covering these ATI sales

Transaction code S (sale) Code for non-derivative open-market or private sale of stock

Key Terms

Rule 10b5-1 Trading Plan, weighted average price, open-market sale, personal tax and estate planning purposes

4 terms

Rule 10b5-1 Trading Plan regulatory

"Shares sold pursuant to a 10b5-1 Trading Plan dated February 5, 2026, entered into for personal tax and estate planning purposes."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted average price financial

"The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $178.71 to $179.70."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

open-market sale financial

"transaction_action": "open-market sale","transaction_code_description": "Sale in open market or private transaction""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

personal tax and estate planning purposes financial

"entered into for personal tax and estate planning purposes."

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did ATI (ATI) disclose for Kimberly A. Fields?

ATI reported that Chair, President and CEO Kimberly A. Fields sold 40,000 shares of ATI common stock. The sales were open-market transactions executed on July 7, 2026, spread across ten separate tranches at different weighted average prices.

At what prices did Kimberly A. Fields sell ATI (ATI) shares?

Kimberly A. Fields’ ATI share sales occurred at weighted average prices within ranges from $178.71 to $185.02 per share. Each Form 4 line reflects a weighted average price for multiple trades executed within the stated price range.

How many ATI (ATI) shares did Kimberly A. Fields sell in total?

The Form 4 shows that Kimberly A. Fields sold a total of 40,000 shares of ATI common stock. These were reported as ten separate open-market sale transactions, each with its own share amount and weighted average sale price.

Was the ATI (ATI) insider sale by Kimberly A. Fields pre-planned?

Yes. The filing states the shares were sold under a Rule 10b5-1 Trading Plan dated February 5, 2026. Such plans schedule trades in advance, indicating these sales were part of a systematic program rather than spontaneous market timing.

Why did Kimberly A. Fields set up the ATI (ATI) trading plan?

The footnote explains the Rule 10b5-1 Trading Plan was entered into for personal tax and estate planning purposes. This indicates the primary motivation disclosed for the scheduled share sales is personal financial planning rather than company-specific developments.

What type of security did Kimberly A. Fields sell in ATI (ATI)?

All reported transactions involve ATI Inc. common stock with par value $0.10 per share. There were no derivative exercises reported; the filing lists only non-derivative open-market sales of directly held common shares.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 07/09/2026 - 04:33 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Fields Kimberly A

(Last) (First) (Middle)

C/O ATI INC.

2021 MCKINNEY AVE., SUITE 1100

(Street)

DALLAS TEXAS 75201

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ATI INC [ ATI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chair, President and CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/08/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.10 per share	07/07/2026		S		2,000(1)	D	$179.25(2)	195,321	D
Common Stock, par value $0.10 per share	07/07/2026		S		2,000(1)	D	$180(3)	193,321	D
Common Stock, par value $0.10 per share	07/07/2026		S		200(1)	D	$180.85(4)	193,121	D
Common Stock, par value $0.10 per share	07/07/2026		S		2,200(1)	D	$181.36(5)	190,921	D
Common Stock, par value $0.10 per share	07/07/2026		S		11,826(1)	D	$182.66(6)	179,095	D
Common Stock, par value $0.10 per share	07/07/2026		S		15,908(1)	D	$183.5(7)	163,187	D
Common Stock, par value $0.10 per share	07/07/2026		S		4,878(1)	D	$184.34(8)	158,309	D
Common Stock, par value $0.10 per share	07/07/2026		S		388	D	$185.1	157,921	D
Common Stock, par value $0.10 per share	07/07/2026		S		200	D	$186.36	157,721	D
Common Stock, par value $0.10 per share	07/07/2026		S		400	D	$187.5	157,321	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Shares sold pursuant to a 10b5-1 Trading Plan dated February 5, 2026, entered into for personal tax and estate planning purposes.

2. The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $178.71 to $179.70. The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the U.S. Securities and Exchange Commission (the "SEC"), upon request, full information regarding the number of shares sold at each specific price within the range reported.

3. The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $179.77 to $180.39. The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the SEC, upon request, full information regarding the number of shares sold at each specific price within the range reported.

4. The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $180.83 to $181.87. The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the SEC, upon request, full information regarding the number of shares sold at each specific price within the range reported.

5. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $181.01 to $181.95. The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the SEC, upon request, full information regarding the number of shares sold at each specific price within the range reported.

6. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $182.06 to $183.01. The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the SEC, upon request, full information regarding the number of shares sold at each specific price within the range reported.

7. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $183.07 to 184.06. The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the SEC, upon request, full information regarding the number of shares sold at each specific price within the range reported.

8. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $184.07 to 185.02. The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the SEC, upon request, full information regarding the number of shares sold at each specific price within the range reported.

	/s/ Amanda J. Skov, Attorney-in-Fact for Kimberly A. Fields	07/09/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)