EX-32.1
Published on March 6, 2026
EXHIBIT 32.1
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
In connection with the Annual Report of Black Spade Acquisition III Co (the “Company”) on Form 10-K for the fiscal year ended December 31, 2025, as filed with the Securities and Exchange Commission (the “Report”), I, Dennis Tam, Executive Chairman of the Board and Co-Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:
1. | The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and |
2. | The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. |
Dated: March 6, 2026
| /s/ Dennis Tam |
| Dennis Tam |
| Executive Chairman of the Board and Co-Chief Executive Officer |
| (Principal Executive Officer) |