Summary
Updated Aug 31, 2026
William C. Stone is Chairman of the Board & CEO of SS&C Technologies Holdings Inc (SSNC). 8 SEC Form 4 filings on record going back to 2024, most recently on 3 March 2026. Most recent open-market trade: sold $10.20M of SSNC on 11 December 2024. Lifetime open-market sales: $29.14M.
Recent Transactions
11Every recent SEC Form 4 transaction William C. Stone has reported, most recent first.
Trading Pattern
InsiderAlpha's records for William C. Stone go back to 2024: 8 primary Form 4 filings, an average of 2.7 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies William C. Stone files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Normand A. Boulanger - $12.88M of SSNC open-market activity in the last 12 months
- Michael Jay Zamkow - $400K of SSNC open-market activity in the last 12 months
- Jonathan E. Michael - $183K of SSNC open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is William C. Stone?
William C. Stone is a corporate insider, tracked as Chairman of the Board & CEO of SS&C Technologies Holdings Inc (SSNC). InsiderAlpha holds 8 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did William C. Stone last file a Form 4?
The most recent primary Form 4 on record is dated 3 March 2026, one of 8 filings going back to 2024.
Has William C. Stone been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($29.14M) across all tracked filings.
Where can I see all of William C. Stone's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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