AQR Reports 8.48% Stake in GigCapital9

GigCapital9 Corp. reports that AQR Capital Management, LLC and related entities beneficially own 2,178,000 shares of Class A ordinary shares, representing 8.48% of the class as of 03/31/2026.

Rhea-AI Filing Summary

GigCapital9 Corp. reports that AQR Capital Management, LLC and related entities beneficially own 2,178,000 shares of Class A ordinary shares, representing 8.48% of the class as of 03/31/2026. The filing shows shared voting and dispositive power of 2,178,000 shares across AQR entities.

The Schedule 13G identifies AQR Capital Management Holdings, LLC, AQR Capital Management, LLC and AQR Arbitrage, LLC as the reporting persons and states organizational details and address information. Signature blocks show the form was signed on 05/13/2026.

Insights

Institutional Ownership Specialist

AQR holds an 8.48% passive stake in GigCapital9 as of 03/31/2026.

The Schedule 13G reports 2,178,000 shares beneficially owned and lists shared voting and dispositive power among AQR entities. This indicates aggregated institutional ownership reported under passive ownership rules rather than an active acquisition statement.

Cash‑flow treatment is not stated and timing of any future transactions is not disclosed; subsequent filings would show changes in position.

Compliance & Filing Analyst

Filing appears to be a routine institutional disclosure under Schedule 13G.

The report names three reporting entities, notes AQR Capital Management, LLC is a subsidiary of AQR Capital Management Holdings, LLC, and that AQR Arbitrage, LLC is controlled by AQR Capital Management, LLC. The filing provides CUSIP G3865B114.

Investors can track ownership changes through future Schedule 13 filings; the form itself contains no transaction or proceeds information.

Key Figures

Beneficially owned shares: 2,178,000 shares Percent of class: 8.48% CUSIP: G3865B114 +1 more

4 metrics

Beneficially owned shares 2,178,000 shares Amount beneficially owned reported on Schedule 13G

Percent of class 8.48% Percent of Class A ordinary shares as reported, as of 03/31/2026

CUSIP G3865B114 Identifier for Class A ordinary share in the filing

Report signature date 05/13/2026 Date the Schedule 13G was signed by authorized signatory

Key Terms

Schedule 13G, Beneficially owned, Shared dispositive power, CUSIP

4 terms

Schedule 13G regulatory

"Item 1. (a) Name of issuer: GigCapital9 Corp."

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

Beneficially owned financial

"Item 4. (a) Amount beneficially owned: 2,178,000 Units representing 2,178,000 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.

Shared dispositive power regulatory

"Shared Dispositive Power 2,178,000.00"

CUSIP technical

"CUSIP Number(s): G3865B114"

A CUSIP is a nine-character alphanumeric code that uniquely identifies a U.S. or Canadian financial security—such as a stock, bond, or fund share—like a Social Security number for an investment. It matters to investors because brokers, exchanges and record-keepers use the CUSIP to match trades, track ownership, settle transactions and pull accurate records, reducing errors and ensuring money and securities go to the right place.

FAQ

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

What stake does AQR report in GigCapital9 (GIX)?

AQR reports 2,178,000 shares of Class A ordinary shares, equal to 8.48% of the class as of 03/31/2026. The Schedule 13G lists shared voting and dispositive power across AQR entities.

Which AQR entities filed the Schedule 13G for GIX?

The filing lists AQR Capital Management, LLC, AQR Capital Management Holdings, LLC, and AQR Arbitrage, LLC as reporting persons, with a principal address at One Greenwich Plaza, Suite 130 in Greenwich, Connecticut.

Does the Schedule 13G show AQR has sole voting or dispositive power?

No. The filing shows 0 shares of sole voting or sole dispositive power and 2,178,000 shares of shared voting and shared dispositive power across the AQR entities.

When was the Schedule 13G signed for GigCapital9?

The signature blocks indicate the report was signed by an authorized signatory, Henry Parkin, on 05/13/2026, while the ownership position is stated as of 03/31/2026.

What CUSIP is used in the filing for GigCapital9?

The Schedule 13G references CUSIP G3865B114 for the Class A ordinary share, par value $0.0001 per share, as stated in the form.

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

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Accepted by SEC EDGAR 05/13/2026 - 10:35 AM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

GigCapital9 Corp.

(Name of Issuer)

Class A ordinary share, par value $0.0001 per share

(Title of Class of Securities)

G3865B114

(CUSIP Number)

03/31/2026

(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): G3865B114

1

Names of Reporting Persons

AQR Capital Management, LLC

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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,178,000.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,178,000.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,178,000.00

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)

8.48 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

CUSIP Number(s): G3865B114

1

Names of Reporting Persons

AQR Capital Management Holdings, LLC

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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,178,000.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,178,000.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,178,000.00

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)

8.48 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP Number(s): G3865B114

1

Names of Reporting Persons

AQR Arbitrage, LLC

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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,178,000.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,178,000.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,178,000.00

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)

8.48 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: GigCapital9 Corp.
(b)	Address of issuer's principal executive offices: 1731 EMBARCADERO RD., SUITE 200, PALO ALTO, CALIFORNIA 94303
Item 2.
(a)	Name of person filing: AQR Capital Management, LLC AQR Capital Management Holdings, LLC AQR Arbitrage, LLC
(b)	Address or principal business office or, if none, residence: ONE GREENWICH PLAZA SUITE 130 Greenwich, Connecticut 06830
(c)	Citizenship: AQR Capital Management, LLC - UNITED STATES AQR Capital Management Holdings, LLC - UNITED STATES AQR Arbitrage, LLC - UNITED STATES
(d)	Title of class of securities: Class A ordinary share, par value $0.0001 per share
(e)	CUSIP Number(s): G3865B114
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: 2,178,000 *Units representing 2,178,000 shares of Class A ordinary shares, par value $0.0001 per share
(b)	Percent of class: 8.48 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: AQR Capital Management, LLC - 0 AQR Capital Management Holdings, LLC - 0 AQR Arbitrage, LLC - 0
	(ii) Shared power to vote or to direct the vote: AQR Capital Management, LLC - 2,178,000 AQR Capital Management Holdings, LLC - 2,178,000 AQR Arbitrage, LLC - 2,178,000
	(iii) Sole power to dispose or to direct the disposition of: AQR Capital Management, LLC - 0 AQR Capital Management Holdings, LLC - 0 AQR Arbitrage, LLC - 0
	(iv) Shared power to dispose or to direct the disposition of: AQR Capital Management, LLC - 2,178,000 AQR Capital Management Holdings, LLC - 2,178,000 AQR Arbitrage, LLC - 2,178,000
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
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.
	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 Item 2(a) above.
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.

AQR Capital Management, LLC

Signature:	Henry Parkin
Name/Title:	Authorized Signatory
Date:	05/13/2026

AQR Capital Management Holdings, LLC

Signature:	Henry Parkin
Name/Title:	Authorized Signatory
Date:	05/13/2026

AQR Arbitrage, LLC

Signature:	Henry Parkin
Name/Title:	Authorized Signatory
Date:	05/13/2026

Exhibit Information

AQR Capital Management Holdings, LLC, AQR Capital Management, LLC, and AQR Arbitrage, LLC hereby agree that this Schedule 13G is filed on behalf of each of the parties. AQR Capital Management, LLC is a wholly owned subsidiary of AQR Capital Management Holdings, LLC. AQR Arbitrage, LLC is deemed to be controlled by AQR Capital Management, LLC.