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

August 6, 2026

Date of Report (Date of earliest event reported)

Pono Capital Four, Inc.

(Exact Name of Registrant as Specified in its Charter)

Cayman Islands		001-43191		N/A
(State or other jurisdiction of incorporation)		(Commission File Number)		(I.R.S. Employer Identification No.)

Suite 210, 2nd Floor Windward III, Regatta Office Park, PO Box 500

Grand Cayman, Cayman Islands

(Address of Principal Executive Offices)

Registrant’s telephone number, including area code: (206) 923-9234

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, each consisting of one Class A ordinary share and one right to receive one-fifth of one Class A ordinary share	PONOU	The Nasdaq Stock Market LLC
Class A ordinary shares, par value $0.0001 per share	PONO	The Nasdaq Stock Market LLC
Share rights, to receive one-fifth of one Class A ordinary share	PONOR	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 7.01. Regulation FD Disclosure.

On August 6, 2026, Pono Capital Four, Inc. issued a press release announcing it had entered into a Merger Agreement with Blackstar Orbital Technologies Corporation. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01. Financial Statements and Exhibits.

Exhibit No.		Description

99.1		Press Release dated August 6, 2026

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.

Dated: August 6, 2026

	PONO CAPITAL FOUR, INC.

	By:	/s/ Dustin Shindo
	Name:	Dustin Shindo
	Title:	Chief Executive Officer