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Form 8-K

sec.gov

8-K — Quantumsphere Acquisition Corp

Accession: 0001829126-26-009623

Filed: 2026-09-02

Period: 2026-09-01

CIK: 0002070900

SIC: 6770 (BLANK CHECKS)

Item: Termination of a Material Definitive Agreement

Item: Financial Statements and Exhibits

Documents

8-K — quantumsphereacq_8k.htm (Primary)

EX-10.1 — EXHIBIT 10.1 (quantumsphereacq_ex10-1.htm)

EX-99.1 — EXHIBIT 99.1 (quantumsphereacq_ex99-1.htm)

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): September 1, 2026

Quantumsphere Acquisition Corporation

(Exact name of registrant as specified in its charter)

Cayman Islands

001-42787

00-0000000N/A

(State or other jurisdiction

of incorporation)

(Commission

File Number)

(IRS Employer

Identification No.)

1185 Avenue of the Americas, Suite 349

New York, NY

10036

(Address of principal executive offices)

(Zip Code)

Registrant’s telephone number, including area code: (212) 574-4425

1185 Avenue of the Americas, Suite 304, New York, NY 10036

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation to the registrant under any of the following provisions:

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol(s)

Name of exchange on which registered

Units, each consisting of one ordinary share and one right

QUMSU

The Nasdaq Stock Market LLC

Ordinary shares, par value $0.0001 per share

QUMS

The Nasdaq Stock Market LLC

Rights, each right entitling the holder to receive one-seventh of one ordinary share

QUMSR

The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 1.02

Termination of a Material Definitive Agreement

As previously disclosed, on October 3, 2025, Quantumsphere

Acquisition Corporation (the “Company”) entered into an Agreement and Plan of Merger (the “Merger Agreement”)

with Omnivate Global Ltd., SACH Pte. Ltd. (“SACH”), QUMS Pubco Ltd. and SACH Merge Sub Ltd.

On September 1, 2026, the Company, QUMS Pubco

Ltd. and SACH Merge Sub Ltd. (collectively, the “Purchaser Parties”) delivered written notice to SACH terminating the Merger

Agreement pursuant to Section 13.2(a) thereof (the “Termination Notice”). Prior to delivering the Termination Notice, the

Purchaser Parties had delivered notice to SACH on July 14, 2026 regarding certain matters under the Merger Agreement and providing the

applicable thirty-day period contemplated by the Merger Agreement to address such matters. Following the expiration of such period, the

Purchaser Parties elected to terminate the Merger Agreement in accordance with its terms. Accordingly, the transactions contemplated by

the Merger Agreement will not be consummated. The Purchaser Parties reserved all rights and remedies available under the Merger Agreement

and applicable law.

The foregoing description is qualified in its

entirety by reference to the Merger Agreement, previously filed as Exhibit 2.1 to the Company’s Current Report on Form 8-K filed

on October 9, 2025, and the Termination Notice, filed as Exhibit 10.1 hereto, each of which is incorporated herein by reference.

Item 9.01

Financial Statements and Exhibits

Exhibit No.

Description

10.1

Termination Notice, dated September 1, 2026

99.1

Press Release

104

Cover Page Interactive Data File (embedded within the Inline XBRL document)

1

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

QUANTUMSPHERE ACQUISITION CORPORATION

By:

/s/ Ping Zhang

Name:

Ping Zhang

Title:

Chief Executive Officer

Date: September 1, 2026

2

EX-10.1 — EXHIBIT 10.1

EX-10.1

Filename: quantumsphereacq_ex10-1.htm · Sequence: 2

Exhibit

10.1

Quantumsphere

Acquisition Corporation

September 1,

2026

Via

email

SACH

Pte. Ltd.

Attn:

Jonathan Zhang

Email:

jonathan@omnivate.co

cc:

KPMG Law Firm

Attn:

Lawrence Ong, Executive Consultant

Email:

lawrenceong@kpmg.com.tw

Re:

Termination of Agreement

and Plan of Merger dated October 3, 2025

Dear

Mr. Zhang:

This

letter will serve as notice that each of Quantumsphere Acquisition Corporation, QUMS Pubco Ltd., and SACH Merge Sub Ltd. (the “Purchaser

Parties”) hereby terminate the Agreement and Plan of Merger dated October 3, 2025 (the “Merger Agreement”) pursuant

to Section 13.2(a) of the Merger Agreement. Following the Notice of Default given to SACH Pte. Ltd. (the “Company”)

on July 14, 2026, the Company has failed to cure the defaults under the Merger Agreement identified therein within the requisite

thirty (30) day period. The Purchaser Parties reserve all rights to seek recovery of damages, costs, expenses, and to seek other legal

and equitable relief available under the Merger Agreement and applicable law.

Quantumsphere

Acquisition Corporation

By:

/s/ Ping Zhang

Ping Zhang

Chief Executive Officer

EX-99.1 — EXHIBIT 99.1

EX-99.1

Filename: quantumsphereacq_ex99-1.htm · Sequence: 3

Exhibit 99.1

Quantumsphere

Acquisition Corporation Announces Termination of the Agreement and Plan of Merger with SACH Pte.Ltd.

NEW YORK, September 1, 2026 – Quantumsphere Acquisition Corporation (Nasdaq: QUMS) (the “Company”) announced today that the Company, QUMS Pubco Ltd. and SACH Merge Sub Ltd. (collectively, the “Purchaser Parties”) have terminated the Agreement and Plan of Merger, dated October 3, 2025 (the “Merger Agreement”), with Omnivate Global Ltd. and SACH Pte. Ltd. (“SACH”).

On September 1, 2026, the Purchaser Parties delivered written notice to SACH terminating the Merger Agreement pursuant to Section 13.2(a)

thereof. Prior to delivering the Termination Notice, the Purchaser Parties had delivered notice to SACH on July 14, 2026 regarding certain

matters under the Merger Agreement and providing the applicable thirty-day period contemplated by the Merger Agreement to address such

matters. Following the expiration of such period, the Purchaser Parties elected to terminate the Merger Agreement in accordance with its

terms. Accordingly, the transactions contemplated by the Merger Agreement will not be consummated. The Purchaser Parties have reserved

all rights and remedies available under the Merger Agreement and applicable law.

The Company intends to continue evaluating opportunities to complete an initial business combination.

About Quantumsphere Acquisition Corporation

Quantumsphere Acquisition Corporation is a blank check company formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses. The Company’s efforts to identify a prospective target business will not be limited to a particular industry or geographic region.

Forward-Looking Statements

This press release includes forward-looking statements that involve risks and uncertainties. Forward-looking statements are statements that are not historical facts. Such forward-looking statements are subject to risks and uncertainties, which could cause actual results to differ from the forward-looking statements. The Company expressly disclaims any obligation or undertaking to publicly release any updates or revisions to any forward-looking statements contained herein to reflect any change in the Company’s expectations with respect thereto or any change in events, conditions or circumstances on which any statement is based, except as required by applicable law.

Contact

Ping Zhang

Chief Executive Officer

Email: pzhang@quantumsphere.com

Tel: (212) 574-4425

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