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Black Spade Acquisition III Co

For the period ended Jun 30, 2026. Filed Aug 11, 2026.

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About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Jun 30, 2026 · Filed Aug 11, 2026

BIII$10.11-0.1%Stored close · as of Nov 6, 2026
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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM****10-Q

(MARK ONE)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarter ended****June 30, 2026

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

**Commission file number:**001-43039

BLACK SPADE ACQUISITION III CO

(Exact Name of Registrant as Specified in Its Charter)

​​​
Cayman Islands​ ​ ​N/A
(State or other jurisdiction ofincorporation or organization)(I.R.S. EmployerIdentification No.)
​​ · ​
Suite 2902, 29/F, The Centrium, 60 Wyndham Street,Central, Hong Kong​ ​ ​00000
(Address of Principal Executive Offices)​(Zip Code)

Registrant’s telephone number, including area code:**+852 **3955 1316

Not Applicable

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

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

​​​​​
Title of each class​ ​ ​Trading Symbol(s)​ ​ ​Name of each exchange on which registered
Class A ordinary shares, $0.0001 par value, included as part of the unitsBIIIThe New York Stock Exchange
Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50, included as part of the unitsBIIIWThe New York Stock Exchange
Units, each consisting of one Class A ordinary share and one-third of one redeemable warrantBIIIUThe New York Stock Exchange

Check whether the issuer (1) filed all reports required to be filed by Section 13 or 15(d) of the Exchange Act during the past 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See definitions of “large accelerated filer”, “accelerated filer”, “smaller reporting company”, and “emerging growth company” in Rule 12b-2 of the Exchange Act.

​
Large accelerated filer☐​Accelerated filer☐
Non-accelerated filer☒​Smaller reporting company☒
​​​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.☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes☒ No☐

As of August 10, 2026, there were 17,250,000 Class A ordinary shares, $0.0001 par value and 5,750,000 Class B ordinary shares, $0.0001 par value, issued and outstanding.

FORM 10-Q FOR THE QUARTER ENDED JUNE 30, 2026

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.