Cannae Holdings, Inc. - 05 Nov 2025 SCHEDULE 13D/A Report for System1, Inc. Class A common stock, par value $0.0001 per share (SST)

Filing manager: Cannae Holdings, Inc.
Reporting owner: Cannae Holdings, Inc.
Security: System1, Inc. Class A common stock, par value $0.0001 per share
Beneficially owned shares: 2,701,279 shares
Large-stake signal: Form
SCHEDULE 13D/A
Active or control-oriented beneficial ownership filing.
Ownership
33%
Beneficial ownership of this reported class.
Shares
2,701,279 shares
Shares beneficially owned as disclosed.
Event date
05 Nov 2025
Date tied to the ownership event or amendment.
Accepted by SEC
12 Nov 2025
EDGAR acceptance date.
How to read this large-stake filing
Schedule 13D/G filings focus on beneficial ownership stakes, not a full portfolio.
Compare this filing with the holder history and issuer page before treating the percentage as a current position.
Use amendments to understand whether the disclosed stake increased, decreased, or changed reporting status.
Class ownership: 33%
Symbol: SST
Shares outstanding: 8,136,383 shares
SEC form: SCHEDULE 13D/A
Accepted by SEC: 12 Nov 2025, 19:26:06 UTC
Event date: 05 Nov 2025
Prior SEC filing: 25 Mar 2025
Next SEC filing: 02 Dec 2025
Source filing: View source filing

Key filing fact

Cannae Holdings, Inc. disclosed 33% ownership in System1, Inc. Class A common stock, par value $0.0001 per share (SST) on 05 Nov 2025.

Key facts

Cannae Holdings, Inc. filed SCHEDULE 13D/A for System1, Inc. Class A common stock, par value $0.0001 per share (SST).
Disclosed ownership: 33%.
Date of event: 05 Nov 2025.

This page turns one Schedule 13D/G filing into a quick large-stake read before the raw reporting-person rows.
Use the linked SEC filing as the source of truth for ownership percentages, shares, and reporting-party details.

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

Reporting persons

Names, ownership percentages, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.

Name	Ownership	Shares owned	Sole voting power	Shared voting power	Signature	Title	CIK
Cannae Holdings, Inc.	33%	2,701,279	0	2,701,279	Cannae Holdings, Inc.	Bryan D. Coy, Chief Financial Officer	0001704720
Cannae Holdings, LLC	33%	2,701,279	0	2,701,279	Cannae Holdings, LLC	Bryan D. Coy, Managing Director and Chief Financial Officer	0001546148

CIK / CUSIP context first

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