System1 SST Institutional Ownership

Ownership Summary

System1, Inc. (NYSE:SST) showed up in the 13F filings of 25 institutional investors as of March 2026.

• Their combined ownership stood at 10.2% of outstanding shares in March 2026, down from 10.4% in December 2025.
• They increased total shares held in System1 by 11.43% from last quarter, and the number of investors in SST decreased 55.36% annually.
• Among the 25 funds, 10 bought more System1 shares, 6 sold down, and 9 held their ground.
• Institutional investors collectively held 826.92K shares in System1 as of March 2026, up by 84.79K shares quarter on quarter, and down 2.66Mn shares year over year.
• Cannae Holdings, Inc. is the top holder of System1 as of March 31, 2026, with 356.8K shares representing 4.41% of outstanding stock.
• The biggest buyers of System1 for the quarter ending March 2026 included VANGUARD CAPITAL MANAGEMENT LLC (37.13K), NINE MASTS CAPITAL Ltd (18.55K), GEODE CAPITAL MANAGEMENT, LLC (9.48K), VANGUARD FIDUCIARY TRUST CO (9.14K), Tower Research Capital LLC (TRC) (6.34K).
• Leading sellers of System1 shares for the quarter ending March 2026 were MILLENNIUM MANAGEMENT LLC (2.83K), GROUP ONE TRADING LLC (440), RENAISSANCE TECHNOLOGIES LLC (300), Royal Bank Of Canada (69), Bank Of America Corp /De/ (27).
• According to Business Quant data, leading holders of SST for March 2026 are Cannae Holdings, Inc. (356.8K), Bank Of America Corp /De/ (161.52K), Cerity Partners LLC (116.84K), VANGUARD CAPITAL MANAGEMENT LLC (37.13K), MILLENNIUM MANAGEMENT LLC (32.62K), BlackRock, Inc. (24.25K), GEODE CAPITAL MANAGEMENT, LLC (23.84K), NINE MASTS CAPITAL Ltd (18.55K), RENAISSANCE TECHNOLOGIES LLC (18.32K), State Street Corp (11.5K).