[SCHEDULE 13G/A] ATI INC SEC Filing

Rhea-AI Filing Summary

BlackRock, Inc. reported beneficial ownership of 13,891,604 shares of ATI Inc. common stock, representing 10.1% of the class as of the event date 09/30/2025. The filing shows BlackRock has sole voting power over 13,436,277 shares and sole dispositive power over 13,891,604 shares. The Schedule 13G/A states these securities are held in the ordinary course of business and not for the purpose of changing or influencing control of ATI. The filing was signed by Spencer Fleming, Managing Director, on 10/03/2025, and references Exhibit 24 (Power of Attorney) and Exhibit 99 (Item 7).

Positive

• 13,891,604 shares disclosed shows transparency in significant ownership
• 10.1% position filed under Schedule 13G indicates a passive, non-control intent

Negative

• No negative items explicitly disclosed in the filing

Insights

Institutional Ownership Analyst

BlackRock holds a significant 10.1% passive stake in ATI through 13.89M shares.

The Schedule 13G/A discloses that BlackRock beneficially owns 13,891,604 shares, representing 10.1% of ATI's common stock as of 09/30/2025. The filing classifies the position as held in the ordinary course of business and not intended to influence control.

This is a material disclosure for investors because a >5% passive stake must be reported and can affect shareholder composition and voting dynamics, though the filer explicitly disclaims intent to change control.

Corporate Governance Specialist

Voting and dispositive power are largely held solely by BlackRock.

BlackRock reports sole voting power for 13,436,277 shares and sole dispositive power for 13,891,604 shares, with no shared voting or dispositive power disclosed.

That concentration of authority means BlackRock can unilaterally vote the majority of its disclosed stake; however, the certification affirms the position is not held to influence control, which is consistent with a Schedule 13G filing rather than a 13D.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 6)

ATI INC

(Name of Issuer)

Common Stock

(Title of Class of Securities)

01741R102

(CUSIP Number)

09/30/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 01741R102

1

Names of Reporting Persons

BlackRock, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 13,436,277.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 13,891,604.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

13,891,604.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

10.1 %

12

Type of Reporting Person (See Instructions)

HC, HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: ATI INC
(b)	Address of issuer's principal executive offices: 2021 MCKINNEY AVENUE, DALLAS, TEXAS, 75201
Item 2.
(a)	Name of person filing: BlackRock, Inc. In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release.
(b)	Address or principal business office or, if none, residence: BlackRock, Inc., 50 Hudson Yards New York, NY 10001
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 01741R102
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 13,891,604
(b)	Percent of class: 10.1%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 13,436,277
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 13,891,604
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Various persons have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of the common stock of ATI INC. No one person's interest in the common stock of ATI INC is more than five percent of the total outstanding common shares.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

BlackRock, Inc.

Signature:	Spencer Fleming
Name/Title:	Managing Director
Date:	10/03/2025

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7

FAQ

What stake does BlackRock report in ATI (ATI)?

BlackRock reports beneficial ownership of 13,891,604 shares, or 10.1% of ATI common stock as of 09/30/2025.

How many shares does BlackRock have sole voting power over?

BlackRock reports sole voting power over 13,436,277 shares of ATI common stock.

Was BlackRock's filing a Schedule 13G or 13D for ATI?

The filing is a Schedule 13G/A, indicating the position is reported as passive and not intended to change or influence control.

Who signed the ATI Schedule 13G/A on behalf of BlackRock?

The filing was signed by Spencer Fleming, Managing Director, on 10/03/2025.

Does the filing identify any shared voting or dispositive power?

No; the filing shows 0 shared voting power and 0 shared dispositive power.