Summary
Updated Aug 31, 2026
H. Clifford Buster III is CEO of Tempur Sealy of SOMNIGROUP INTERNATIONAL INC. (SGI). 3 SEC Form 4 filings on record going back to 2025, most recently on 2 March 2026. Most recent open-market trade: sold $5.69M of SGI on 19 August 2025. Lifetime open-market sales: $7.15M.
Recent Transactions
4Every recent SEC Form 4 transaction H. Clifford Buster III has reported, most recent first.
Trading Pattern
InsiderAlpha's records for H. Clifford Buster III go back to 2025: 3 primary Form 4 filings, an average of 1.5 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 H. Clifford Buster III 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.
- Simon Dyer - $2.99M of SGI open-market activity in the last 12 months
- Scott L. Thompson - $1.89M of SGI open-market activity in the last 12 months
- Cathy R. Gates - $522K of SGI open-market activity in the last 12 months
- Steven H. Rusing - $446K of SGI 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 H. Clifford Buster III?
H. Clifford Buster III is a corporate insider, tracked as CEO of Tempur Sealy of SOMNIGROUP INTERNATIONAL INC. (SGI). InsiderAlpha holds 3 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did H. Clifford Buster III last file a Form 4?
The most recent primary Form 4 on record is dated 2 March 2026, one of 3 filings going back to 2025.
Has H. Clifford Buster III been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($7.15M) across all tracked filings.
Where can I see all of H. Clifford Buster III'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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