Table of Contents As filed with the U.S. Securities and Exchange Commission on December 4, 2025 Registration No. 333-290602 TO FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Black Spade Acquisition III Co (Exact Name of Registrant as Specified in Its Charter) UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT NO. 1 (Address, including zip code, and telephone number, including area code, of registrant's principal executive offices) Cogency Global Inc. 122 East ...

Financial Performance - Total operating revenues increased by 10.8% to $1.232 billion in 1Q'25, compared to $1.112 billion in 1Q'24[17] - Gaming revenue increased by 12.2% to $1.024 billion in 1Q'25, compared to $913 million in 1Q'24[17] - Non-gaming revenue increased by 4.4% to $208 million in 1Q'25, compared to $199 million in 1Q'24[17] - Net income increased significantly by 4944.9% to $28 million in 1Q'25, compared to $1 million in 1Q'24[17] - Adjusted Property EBITDA increased by 14.1% to $341 million in 1Q'25, compared to $299 million in 1Q'24[17] Performance by Property - City of Dreams Macau's Adjusted EBITDA increased by 27.5% to $196 million in 1Q'25, compared to $154 million in 1Q'24[17] - Studio City's Adjusted EBITDA increased by 10.7% to $97 million in 1Q'25, compared to $88 million in 1Q'24[17] - Altira recorded a negative Adjusted EBITDA of $1 million in 1Q'25, compared to a positive $1 million in 1Q'24, a decrease of 148.3%[17] - City of Dreams Manila's Adjusted EBITDA decreased by 20.6% to $30 million in 1Q'25, compared to $38 million in 1Q'24[17] - City of Dreams Mediterranean and Other's Adjusted EBITDA increased by 10.2% to $12 million in 1Q'25, compared to $11 million in 1Q'24[17] Shareholder Returns - Approximately $4.1 billion has been returned to shareholders from 2016 to 2025 YTD in the form of dividends and share repurchases[45, 46, 47] - From January 1, 2025, to May 7, 2025, Melco repurchased 32.3 million ADSs for approximately $165 million[47]

Financial Performance - Total operating revenues increased by 10.8% to $1.232 billion in 1Q'25, compared to $1.112 billion in 1Q'24[17] - Gaming revenue increased by 12.2% to $1.024 billion in 1Q'25, compared to $913 million in 1Q'24[17] - Non-gaming revenue increased by 4.4% to $208 million in 1Q'25, compared to $199 million in 1Q'24[17] - Net income increased significantly to $28 million in 1Q'25, a 4944.9% change from $1 million in 1Q'24[17] - Adjusted Property EBITDA increased by 14.1% to $341 million in 1Q'25, compared to $299 million in 1Q'24[17] - Adjusted EBITDA increased by 10.2% to $313 million in 1Q'25, compared to $284 million in 1Q'24[17] Property-Specific Performance - City of Dreams Macau's Adjusted EBITDA increased by 27.5% to $196 million in 1Q'25, compared to $154 million in 1Q'24[17] - Studio City's Adjusted EBITDA increased by 10.7% to $97 million in 1Q'25, compared to $88 million in 1Q'24[17] - Altira recorded a negative Adjusted EBITDA of $1 million in 1Q'25, compared to a positive $1 million in 1Q'24, a -148.3% change[17] - City of Dreams Manila's Adjusted EBITDA decreased by 20.6% to $30 million in 1Q'25, compared to $38 million in 1Q'24[17] - City of Dreams Mediterranean and Other's Adjusted EBITDA increased by 10.2% to $12 million in 1Q'25, compared to $11 million in 1Q'24[17] Shareholder Returns - Approximately $4.1 billion has been returned to shareholders from 2016 to 2025 YTD through dividends and share repurchases[46] - From January 1, 2025 to May 7, 2025, Melco repurchased 32.3 million ADSs at an aggregate purchase price of approximately $165 million[47] - The company has remaining authority to repurchase up to approximately $223 million of ordinary shares[47]