Welch John R.

Welch John R. is listed in filings as Director at Clean Harbors Inc. This profile follows SEC Form 4 activity through May 22, 2026, including sale activity. Recent filings connect the profile to Clean Harbors Inc (CLH). The current snapshot covers public activity from May 23, 2025 to May 22, 2026. Reported amounts are shown as $204.8K to $285.6K. The page organizes purchases, sales, issuer links, reported share activity, and filing evidence for review as public disclosure data.