Summary
Updated Aug 31, 2026
Eric W. Gerstenberg is CO-CEO of CLEAN HARBORS INC (CLH). 11 SEC Form 4 filings on record going back to 2024, most recently on 18 August 2026. Most recent open-market trade: sold $803K of CLH on 18 August 2026. Lifetime open-market sales: $5.13M.
Recent Transactions
15Every recent SEC Form 4 transaction Eric W. Gerstenberg has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Eric W. Gerstenberg go back to 2024: 11 primary Form 4 filings, an average of 3.7 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 Eric W. Gerstenberg 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
- 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
- Marcy L. Reed - $241K 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 Eric W. Gerstenberg?
Eric W. Gerstenberg is a corporate insider, tracked as CO-CEO of CLEAN HARBORS INC (CLH). InsiderAlpha holds 11 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Eric W. Gerstenberg submitted recently?
3 primary Form 4 filings in the last 90 days, covering 1 company.
Has Eric W. Gerstenberg been buying or selling stock?
Recorded transactions: 0 open-market purchases and 5 open-market sales ($5.13M) across all tracked filings.
Where can I see all of Eric W. Gerstenberg'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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