Highbridge exits Quantumsphere Acquisition Corp (QUMS) stake

Rhea-AI Filing Summary

Highbridge Capital Management filed an amended ownership report for Quantumsphere Acquisition Corp ordinary shares. The firm now reports beneficial ownership of 0 shares, representing 0% of the class as of December 31, 2025, with no sole or shared voting or dispositive power.

The filing notes that any securities referenced were acquired and held in the ordinary course of business and not for the purpose of changing or influencing control of the company.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Quantumsphere Acquisition Corp

(Name of Issuer)

Ordinary Shares, par value $0.0001 per share

(Title of Class of Securities)

G7387B106

(CUSIP Number)

12/31/2025

(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. G7387B106

1

Names of Reporting Persons

Highbridge 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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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)

0 %

12

Type of Reporting Person (See Instructions)

IA, OO

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Quantumsphere Acquisition Corp
(b)	Address of issuer's principal executive offices: 1185 Avenue of the Americas, Suite 304, New York, NY, 10036
Item 2.
(a)	Name of person filing: This statement is filed by Highbridge Capital Management, LLC ("Highbridge" or the "Reporting Person"), a Delaware limited liability company and the investment adviser to certain funds and accounts (the "Highbridge Funds"), with respect to the ordinary shares, par value $0.0001 per share ("Ordinary Shares"), of Quantumsphere Acquisition Corporation, a Cayman Islands exempted company, that were directly held by the Highbridge Funds.
(b)	Address or principal business office or, if none, residence: The address of the business office of the Reporting Person is 390 Madison Avenue, 28th Floor, New York, NY 10017.
(c)	Citizenship: Highbridge is a Delaware limited liability company.
(d)	Title of class of securities: Ordinary Shares, par value $0.0001 per share
(e)	CUSIP No.: G7387B106
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: The information required by Item 4(a) is set forth in Row 9 of the cover page for the Reporting Person and is incorporated herein by reference.
(b)	Percent of class: 0%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: The information required by Item 4(c)(i) is set forth in Row 5 of the cover page for the Reporting Person and is incorporated herein by reference.
	(ii) Shared power to vote or to direct the vote: The information required by Item 4(c)(ii) is set forth in Row 6 of the cover page for the Reporting Person and is incorporated herein by reference.
	(iii) Sole power to dispose or to direct the disposition of: The information required by Item 4(c)(iii) is set forth in Row 7 of the cover page for the Reporting Person and is incorporated herein by reference.
	(iv) Shared power to dispose or to direct the disposition of: The information required by Item 4(c)(iv) is set forth in Row 8 of the cover page for the Reporting Person and is incorporated herein by reference.
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 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.

Highbridge Capital Management, LLC

Signature:	/s/ Kirk Rule
Name/Title:	Kirk Rule, Executive Director
Date:	02/17/2026

FAQ

What did Highbridge report in its Schedule 13G/A for QUMS?

Highbridge Capital Management reported beneficial ownership of 0 ordinary shares of Quantumsphere Acquisition Corp, representing 0% of the class as of December 31, 2025, indicating it no longer holds a reportable stake.

Who is the reporting person in the Quantumsphere (QUMS) Schedule 13G/A?

The reporting person is Highbridge Capital Management, LLC, a Delaware limited liability company and investment adviser to certain funds and accounts that previously directly held Quantumsphere Acquisition Corp ordinary shares.

What percentage of Quantumsphere (QUMS) shares does Highbridge now own?

Highbridge reports owning 0% of Quantumsphere Acquisition Corp’s ordinary shares. The cover page shows an aggregate beneficial ownership amount of 0.00 shares and a percent of class of 0% as of December 31, 2025.

Does Highbridge still have voting power over Quantumsphere (QUMS) shares?

No. Highbridge reports 0.00 sole voting power and 0.00 shared voting power over Quantumsphere Acquisition Corp ordinary shares, along with 0.00 sole and shared dispositive power, confirming no remaining reportable control over the stock.

Why was this ownership statement for Quantumsphere (QUMS) filed?

The amended statement reflects that Highbridge now owns 5 percent or less of the class, specifically 0%, and confirms that any securities were acquired and held in the ordinary course of business, not to change or influence control of Quantumsphere Acquisition Corp.

Who signed the Highbridge Schedule 13G/A related to QUMS?

The filing was signed by Kirk Rule, Executive Director, on behalf of Highbridge Capital Management, LLC. The signature section certifies that the information provided is true, complete, and correct to the best of his knowledge and belief.