Highest-materiality recent filing
Clean Harbors shareholders re-elect all Class I directors, approve say-on-pay and auditor
Four Class I directors re-elected with overwhelming support; highest vote for Shelley Stewart Jr. (48.3M for, 316K withheld).
Founder Alan S. McKim to retire as Executive Chairman and CTO of Clean Harbors
Founder, Executive Chairman & CTO Alan S. McKim retiring from Board and officer role upon appointment of new Chair, expected summer 2026.
Clean Harbors acquires Terra Nova Solutions for $225M all-cash
$225M all-cash acquisition of Terra Nova, a regional hazardous waste provider with 5 sites in the Carolinas.
Clean Harbors Q1 revenue record $1.46B; raises FY2026 EBITDA and FCF guidance
Net income $63.2M ($1.19 diluted EPS) vs $58.7M ($1.09) in Q1 2025; revenue up 2% to $1.46B.
Clean Harbors Q4 2025 Revenue $1.5B, Net Income $86.6M; Announces $350M Buyback, $130M Acquisition
Q4 2025 revenue $1.50B (+5% YoY), full-year record $6.03B (+2% YoY).
Revenue $1.55B flat YoY; net income $118.8M ($2.21 EPS vs $2.12); adj. EBITDA $320.2M (+6%), margin 20.7% (up 100 bps).
Issued $745M of 5.750% senior notes due 2033; interest payable semi-annually starting April 15, 2026.
Clean Harbors prices $745M senior notes at 5.750% due 2033 for refinancing
Offering reduced from $845M to $745M; $100M shift to new secured term loan facility.
Clean Harbors Q2 2025: Revenue $1.55B flat, Adj EBITDA record $336.2M, reaffirms FY guidance
Net income $126.9M ($2.36 EPS) vs $133.3M ($2.46 EPS) a year ago.
All five director nominees elected with >46M votes for each; broker non-votes of 2,113,318.
On May 19, 2026, Alan S. McKim, serving in the capacities of Executive Chairman of the Board of Directors (the “Board”) and Chief Technology Officer, notified the Board of his intention to retire from the Board and his role as Chief Technology Officer, effective upon the Board’s appointment of a new Chairman.
Max materiality 0.80 · Median 0.71 · Most common event earnings