System1, Inc.
SST- Exchange
- NYSE
- Industry
- Services-Computer Programming, Data Processing, Etc.
- SEC CIK
- 0001805833
No open-market purchases or sales by System1, Inc. insiders were filed in the last 90 days; 21 institutions reported holding it in 13F filings for Q2 2026, worth $1.38M in total; no superinvestor holds it.
Other share classesSSTPW
Holders of 5% or more of SST
Holders whose latest Schedule 13D or 13G filing reports 5% or more of System1, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Cannae Holdings, Inc. | 13D/A | 36.30%27.0M shares | – | Mar 25, 20251 filing | Mar 25, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
1 Schedule 13D or 13G filing on System1, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 25, 20257:30 PM ET | Cannae Holdings, Inc.and 1 other | 13D/A | 36.30%27.0M shares | – | Mar 11, 2025 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell System1, Inc. shares.
No Form 144 notices for System1, Inc. are on file.