Summary
Updated Aug 31, 2026
John Michael Custer files SEC Form 4 reports at WATSCO INC (WSO). 1 SEC Form 4 filing on record, dated 10 June 2025. Most recent open-market trade: sold $986K of WSO on 10 June 2025. Lifetime open-market sales: $986K.
Recent Transactions
1Every recent SEC Form 4 transaction John Michael Custer has reported, most recent first.
Trading Pattern
InsiderAlpha's records for John Michael Custer go back to 2025: 1 primary Form 4 filing, an average of 0.5 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 have reported open-market trades at the same companies as John Michael Custer. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Barry S. Logan - $5.59M of WSO open-market activity on record
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is John Michael Custer?
John Michael Custer is a corporate insider of WATSCO INC (WSO). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did John Michael Custer last file a Form 4?
The only primary Form 4 on record is dated 10 June 2025.
Has John Michael Custer been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($986K) across all tracked filings.
Where can I see all of John Michael Custer'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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