[Form 4] ATI Inc. Insider Trading Activity

Rhea-AI Filing Summary

ATI Inc. (ATI) – Form 4 insider transaction: Executive Chairman Robert S. Wetherbee disclosed the sale of exactly 50,000 common shares on 08/05/2025 under a pre-arranged Rule 10b5-1 trading plan dated 12/12/2025 (estate / tax planning purpose). The shares were split into three market sales:

• 40,777 sh @ weighted avg $74.48 (range $73.87–$74.86)
• 7,220 sh @ weighted avg $75.30 (range $74.87–$75.86)
• 2,003 sh @ weighted avg $76.10 (range $75.87–$76.33)

After the transactions, Wetherbee’s direct ownership fell from 356,538.3409 to 306,538.3409 shares, maintaining a substantial equity stake. No derivative security activity was reported. Filing made by attorney-in-fact on 08/06/2025.

Positive

• 10b5-1 plan indicates sales were pre-arranged, reducing potential perception of opportunistic trading.
• Executive Chairman retains over 306k shares, sustaining meaningful ownership alignment with investors.

Negative

• Insider sale of 50,000 shares may be interpreted as reduced confidence or need for liquidity.
• Total insider ownership decreased by roughly 14% (50k/356.5k), a noticeable drop in stake.

Insights

Senior Equity Analyst

TL;DR: Chairman sold 50k ATI shares (~14% of holding) via 10b5-1; modest governance negative but not thesis-changing.

The filing documents a sizeable, but not massive, disposition by ATI’s Executive Chairman. The sale is pre-scheduled under Rule 10b5-1, mitigating concerns over informational timing. Post-sale, Wetherbee still controls >300k shares, aligning him with shareholders. No accompanying negative news or option exercises appear. For a company with ~129 m shares outstanding, the transaction is immaterial to float but can be a soft signal of insider sentiment. Impact viewed as slightly negative because it reduces insider ownership, yet limited in scale and executed transparently.

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^*

WETHERBEE ROBERT S

(Last) (First) (Middle)

2021 MCKINNEY AVENUE

SUITE 1100

(Street)

DALLAS TX 75201

(City) (State) (Zip)

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)
	Executive Chairman

3. Date of Earliest Transaction (Month/Day/Year)
08/05/2025

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

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

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

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	08/05/2025		S		40,777(1)	D	$74.48(2)	315,761.3409	D
Common Stock, par value $0.10 per share	08/05/2025		S		7,220(1)	D	$75.3(3)	308,541.3409	D
Common Stock, par value $0.10 per share	08/05/2025		S		2,003(1)	D	$76.1(4)	306,538.3409	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 December 12, 2025, 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 $73.87 to to $74.86. 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 $74.87 to to $75.86. 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 $75.87 to to $76.33. 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 Robert S. Wetherbee	08/06/2025
	** 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.

FAQ

How many ATI shares did Robert S. Wetherbee sell on 08/05/2025?

He sold a total of 50,000 common shares across three separate market transactions.

At what prices were the ATI shares sold?

Weighted average prices were $74.48, $75.30, and $76.10; each bucket was executed within the detailed price ranges shown in the filing.

Does the insider still own ATI stock after these sales?

Yes. Following the transactions, Wetherbee continues to hold 306,538.3409 shares directly.

Were the transactions executed under a Rule 10b5-1 plan?

Yes. The filing states the sales were made under a 10b5-1 Trading Plan dated 12/12/2025 for tax and estate planning purposes.

Is there any derivative security activity reported?

No. Table II shows no derivative securities acquired or disposed of during the reporting period.