AUNA stake cut to 4.99% by Texas pension

Teacher Retirement System of Texas filed an amended Schedule 13G reporting its passive ownership in AUNA S.A..

Rhea-AI Filing Summary

Teacher Retirement System of Texas filed an amended Schedule 13G reporting its passive ownership in AUNA S.A.. As of the close of business on April 14, 2026, it beneficially owned 1,504,140 Class A Ordinary Shares, with a par value of $0.01 per share. This position represents 4.99% of AUNA’s Class A Ordinary Shares outstanding, based on 30,095,388 shares outstanding as of December 31, 2025, as reported in AUNA’s Form 20-F. The fund reports sole voting and dispositive power over all 1,504,140 shares and no shared voting or dispositive power, and notes that it now holds 5 percent or less of this class.

Key Figures

Shares beneficially owned: 1,504,140 shares Percent of class owned: 4.99% Shares outstanding: 30,095,388 shares +2 more

5 metrics

Shares beneficially owned 1,504,140 shares Class A Ordinary Shares owned by Teacher Retirement System of Texas as of April 14, 2026

Percent of class owned 4.99% Portion of AUNA Class A Ordinary Shares beneficially owned by Teacher Retirement System of Texas

Shares outstanding 30,095,388 shares AUNA Class A Ordinary Shares outstanding as of December 31, 2025, per Form 20-F

Sole voting power 1,504,140 shares Shares over which Teacher Retirement System of Texas has sole voting power

Sole dispositive power 1,504,140 shares Shares over which Teacher Retirement System of Texas has sole dispositive power

Key Terms

beneficially owned, sole voting power, sole dispositive power, Ownership of 5 percent or less of a class, +1 more

5 terms

beneficially owned financial

"As of the close of business on April 14, 2026, Teacher Retirement System of Texas owned 1,504,140 shares"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole voting power financial

"Sole Voting Power 1,504,140.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

sole dispositive power financial

"Sole Dispositive Power 1,504,140.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

Ownership of 5 percent or less of a class financial

"Item 5. | Ownership of 5 Percent or Less of a Class."

Class A Ordinary Shares financial

"Title of class of securities: Class A Ordinary Shares, $0.01 par value per share"

Class A ordinary shares are a type of ownership stake in a company that typically grants voting rights to shareholders, allowing them to have a say in important company decisions. They often come with priority in receiving dividends or profits, making them attractive to investors seeking influence and potential income. These shares help distinguish different levels of ownership and rights within a company's stock structure.

FAQ

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

What percentage of AUNA (AUNA) does Teacher Retirement System of Texas own?

Teacher Retirement System of Texas reported beneficial ownership of 4.99% of AUNA’s Class A Ordinary Shares. This is based on 30,095,388 shares outstanding as of December 31, 2025, as disclosed in AUNA’s Form 20-F.

How many AUNA (AUNA) shares are held by Teacher Retirement System of Texas?

Teacher Retirement System of Texas reported owning 1,504,140 Class A Ordinary Shares of AUNA S.A. as of the close of business on April 14, 2026, all of which carry sole voting and dispositive power according to the filing.

Does Teacher Retirement System of Texas share voting power over its AUNA (AUNA) shares?

No. The filing states sole voting power over 1,504,140 shares and shared voting power of 0 shares. It also reports sole dispositive power over 1,504,140 shares and no shared dispositive power.

What is the total number of AUNA (AUNA) Class A shares outstanding used for the 4.99% calculation?

The 4.99% ownership was calculated using 30,095,388 Class A Ordinary Shares outstanding as of December 31, 2025, a figure reported by AUNA S.A. in its Form 20-F filed on April 22, 2026.

What does “Ownership of 5 percent or less” mean in the AUNA (AUNA) Schedule 13G/A?

The filing includes an item stating ownership of 5 percent or less of a class, indicating that Teacher Retirement System of Texas’ reported stake in AUNA S.A.’s Class A Ordinary Shares is below the 5% threshold as of April 14, 2026.

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

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Available on EDGAR 08/12/2026 - 01:51 PM Accepted by SEC EDGAR 08/12/2026 - 01:51 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

AUNA S.A.

(Name of Issuer)

Class A Ordinary Shares, $0.01 par value per share

(Title of Class of Securities)

L0415A103

(CUSIP Number)

04/14/2026

(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)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): L0415A103

1

Names of Reporting Persons

TEACHER RETIREMENT SYSTEM OF TEXAS

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

TEXAS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,504,140.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,504,140.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,504,140.00

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)

4.9 %

12

Type of Reporting Person (See Instructions)

EP

SCHEDULE 13G

Item 1.
(a)	Name of issuer: AUNA S.A.
(b)	Address of issuer's principal executive offices: 6, RUE JEAN MONNET, GRAND DUCHY OF LUXEMBOURG, LUXEMBOURG, L-2180
Item 2.
(a)	Name of person filing: Teacher Retirement System of Texas
(b)	Address or principal business office or, if none, residence: 4655 Mueller Blvd, Austin TX 78723
(c)	Citizenship: United States
(d)	Title of class of securities: Class A Ordinary Shares, $0.01 par value per share
(e)	CUSIP No.: L0415A103
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: As of the close of business on April 14, 2026, Teacher Retirement System of Texas owned 1,504,140 shares of the Issuer's Class A Ordinary Shares par value $0.01 per share (the Ordinary Shares).
(b)	Percent of class: As of the close of business on April 14, 2026, Teacher Retirement System of Texas may be deemed to have beneficially owned 1,504,140 shares of the Issuer's Class A Ordinary Shares or 4.99% of the Issuer's Class A Ordinary Shares outstanding, which percentage was calculated based on 30,095,388 shares of the Issuer's Class A Ordinary Shares outstanding as of, December 31, 2025 as reported in the Issuer's Form 20-F as filed with the SEC on April 22, 2026.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1,504,140
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 1,504,140
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
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.

TEACHER RETIREMENT SYSTEM OF TEXAS

Signature:	Christopher Bowlin
Name/Title:	Director
Date:	08/12/2026