Filings (90d)
0
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies John T. Preston 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 in CLH purchases and sales in the last 12 months
- Eric W. Gerstenberg - $1.80M in CLH purchases and sales in the last 12 months
- Brian P. Weber - $1.37M in CLH purchases and sales in the last 12 months
- Sharon M. Gabriel - $999K in CLH purchases and sales in the last 12 months
- Eric J. Dugas - $784K in CLH purchases and sales in the last 12 months
- Andrea Robertson - $248K in CLH purchases and sales in the last 12 months
More insiders (A-Z)
Browse nearby insider profiles in alphabetical order.
Frequently asked questions
Who is John T. Preston?
John T. Preston is a corporate insider of CLEAN HARBORS INC (CLH). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
When did John T. Preston last file a Form 4?
The only primary Form 4 on record is dated 22 May 2026.
