Summary
Updated Aug 31, 2026
Robert M. Buck is CEO of QXO Insulation, LLC (BLD). 5 SEC Form 4 filings on record going back to 2025, most recently on 1 July 2026. Most recent open-market trade: sold $2.09M of BLD on 10 November 2025. Lifetime open-market sales: $5.14M.
Recent Transactions
9Every recent SEC Form 4 transaction Robert M. Buck has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Robert M. Buck go back to 2025: 5 primary Form 4 filings, an average of 2.5 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 Robert M. Buck 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.
- Luis Francisco Machado - $450K of BLD open-market activity in the last 12 months
- Robyn L. Bradbury - $263K of CNM open-market activity in the last 12 months
- James D. Hope - $195K of CNM open-market activity in the last 12 months
- Ernesto Bautista III - $56K of BLD 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 Robert M. Buck?
Robert M. Buck is a corporate insider, tracked as CEO of QXO Insulation, LLC (BLD). InsiderAlpha holds 5 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Robert M. Buck submitted recently?
2 primary Form 4 filings in the last 90 days, covering 2 companies.
Has Robert M. Buck been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($5.14M) across all tracked filings.
Where can I see all of Robert M. Buck'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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