X0203 0000876661 NEW YORK STOCK EXCHANGE LLC 0001859686 SilverBox Corp III 001-41632

1250 S CAPITAL OF TEXAS HIGHWAY BUILDING Austin TX TEXAS 78746

Class A Common Stock; Units, each consisting of one Class A Common Stock and one-third of one redeemable warrant; Redeemable warrants, each whole warrant exercisable for one share of Class A Common Stock at an exercise price of $11.50 17 CFR 240.12d2-2(a)(1) Daniel Contrastano Manager, Market Watch & Proxy Compliance 2024-11-15