System1, Inc.

System1, Inc. (NYSE: SST) is a digital advertising technology company that completed its business combination with Trebia Acquisition Corp in January 2022, bringing the company into the public markets through a de-SPAC transaction. Trebia, which conducted its IPO in 2020, was sponsored by entities affiliated with Trasimene Capital Management and Cannae Holdings. System1 operates an omnichannel customer acquisition platform, connecting advertisers with consumers across search, social, and display channels. The company filed an 8-K with the Securities and Exchange Commission on July 24, 2026, continuing its post-merger disclosure cadence as an active public registrant. Sign up on SpacDesk for full filings, sponsor data, and analytics on SST and the broader SPAC universe.