Summary
Updated Aug 30, 2026
John R. Welch files SEC Form 4 reports at CLEAN HARBORS INC (CLH). 2 SEC Form 4 filings on record, most recently on 22 May 2026. Most recent open-market trade: sold $205K of CLH on 20 February 2026. Lifetime open-market sales: $205K.
Recent Transactions
2Every recent SEC Form 4 transaction John R. Welch has reported, most recent first.
Trading Pattern
InsiderAlpha's records for John R. Welch go back to 2026: 2 primary Form 4 filings, an average of 2.0 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 John R. Welch 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.
- Alan S. McKim - $57.38M of CLH open-market activity in the last 12 months
- Eric W. Gerstenberg - $1.80M of CLH open-market activity in the last 12 months
- Brian P. Weber - $1.37M of CLH open-market activity in the last 12 months
- Sharon M. Gabriel - $999K of CLH open-market activity in the last 12 months
- Eric J. Dugas - $784K of CLH open-market activity in the last 12 months
- Andrea Robertson - $248K of CLH 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 John R. Welch?
John R. Welch is a corporate insider of CLEAN HARBORS INC (CLH). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
When did John R. Welch last file a Form 4?
The most recent primary Form 4 on record is dated 22 May 2026, one of 2 filings going back to 2026.
Has John R. Welch been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($205K) across all tracked filings.
Where can I see all of John R. Welch'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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