X0202 SCHEDULE 13G 0002086595 XXXXXXXX LIVE Class A Ordinary Shares, par value $0.0001 per share 03/31/2026 0002087087 Black Spade Acquisition III Co G1154S103 Suite 2902, 29/F The Centrium, 60 Wyndham Street Central Hong Kong K3 00000 Rule 13d-1(d) Black Spade Sponsor LLC III E9 5120000.00 0.00 5120000.00 0.00 5120000.00 N 22.3 OO (1) As of March 31, 2026, the Reporting Person may be deemed to beneficially own 5,120,000 Class B Ordinary Shares of the Issuer, representing 22.3% of the total Class A and Class B Ordinary Shares issued and outstanding. The Class B Ordinary Shares are automatically convertible into Issuer's Class A Ordinary Shares at the time of the Issuer's initial business combination, or earlier at the option of the holder, on a one-for-one basis, subject to adjustment, as more fully described under the heading "Description of Securities - Founders Shares" in the Issuer's prospectus filed pursuant to Rule 424(b)(4) (File No. 333-290602). Black Spade Sponsor LLC III is the record holder of the shares reported herein. The three managers of the Reporting Person are Dennis Tam, Zoe Tse and Sammy Hsieh. Each manager has one vote, and the approval of two of the three managers is required to approve an action of the Reporting Person. Under the so-called "rule of three," if voting and dispositive decisions regarding an entity's securities are made by two or more individuals, and a voting and dispositive decision requires the approval of a majority of those individuals, then none of the individuals is deemed a beneficial owner of the entity's securities. This is the situation with regard to the Reporting Person. Based upon the foregoing analysis, no individual manager of the Reporting Person exercises voting or dispositive control over any of the securities held by the Reporting Person. Accordingly, none of them will be deemed to have or share beneficial ownership of such shares, and each of them disclaims beneficial ownership of such shares. Black Spade Acquisition III Co Suite 2902, 29/F, The Centrium, 60 Wyndham Street, Central Hong Kong 00000 Black Spade Sponsor LLC III Suite 2902, 29/F, The Centrium, 60 Wyndham Street, Central Hong Kong, 00000 Cayman Islands Y 5,120,000 22.3% 5,120,000 -0- 5,120,000 -0- Y Y Y Y Y Y Black Spade Sponsor LLC III /s/ Chi Wai Dennis Tam 08/25/2026