SilverBox Corp IV (Nasdaq: SBXD) is a blank-check company sponsored by SilverBox Capital, the Dallas-based investment firm behind the SilverBox SPAC franchise. The vehicle, which went public in the energy and industrials sector, is currently in active business-combination proceedings, as evidenced by a Form 425 filed with the SEC on May 12, 2026 under accession number 0001104659-26-059396. Form 425 filings are prospectus-related communications submitted in connection with a proposed merger or acquisition transaction. SilverBox Capital has previously sponsored multiple SPAC vehicles targeting opportunities in the energy transition and industrial services spaces. For complete filing history, deal timeline, and target-company data on SBXD, sign up for full access at SpacDesk.