UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 8-K

Current Report

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

March 30, 2026

Date of Report (Date of earliest event reported)

A SPAC III Acquisition Corp.

(Exact Name of Registrant as Specified in its Charter)

British Virgin Islands 001-42401 n/a
(State or other jurisdiction
of incorporation)
(Commission File Number) (I.R.S. Employer
Identification No.)
The Sun’s Group Center
29th Floor, 200 Gloucester Road
Wan Chai
Hong Kong
n/a
(Address of Principal Executive Offices) (Zip Code)

Registrant’s telephone number, including area code: +1 702 287 9776

N/A

(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 of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act
☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act
☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act
☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act

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

Title of each class Trading Symbol(s) Name of each exchange on which registered
Units ASPCU The Nasdaq Stock Market LLC
Class A ordinary shares, no par value ASPC The Nasdaq Stock Market LLC
Rights ASPCR 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 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

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 8.01. Other Events.

On March 30, 2026, A SPAC III Acquisition Corp. made available to holders of its Class A ordinary shares its PFIC Annual Statement for fiscal year 2025, which is attached as Exhibit 99.1 to this Current Report on Form 8-K.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit No. Description
99.1 A SPAC III Acquisition Corp PFIC Annual Statement — Class A.
104 Cover Page Interactive Data File (embedded within the Inline XBRL document).

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SIGNATURE

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.

A SPAC III ACQUISITION CORP.
Dated: March 30, 2026 By: /s/ Claudius Tsang
Name: Claudius Tsang
Title: Chief Executive Officer and
Chief Financial Officer

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