CLEAN HARBORS INC

Q: Jun 30 2026

Q: Mar 31 2026

FY: Dec 31 2025

Q: Sep 30 2025

Q: Jun 30 2025

Q: Mar 31 2025

FY: Dec 31 2024

Q: Sep 30 2024

Q: Jun 30 2024

Q: Mar 31 2024

FY: Dec 31 2023

Q: Sep 30 2023

Q: Jun 30 2023

Q: Mar 31 2023

FY: Dec 31 2022

Q: Sep 30 2022

Q: Jun 30 2022

Q: Mar 31 2022

FY: Dec 31 2021

Q: Sep 30 2021

Entry into a Material Definitive Agreement

Other Events

Other Events

Results of Operations and Financial Condition

Submission of Matters to a Vote of Security Holders

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Other Events

Results of Operations and Financial Condition

Results of Operations and Financial Condition

Results of Operations and Financial Condition

Entry into a Material Definitive Agreement

Other Events

Results of Operations and Financial Condition

Submission of Matters to a Vote of Security Holders

Results of Operations and Financial Condition

Results of Operations and Financial Condition

Results of Operations and Financial Condition

Entry into a Material Definitive Agreement

5.02,7.01,9.01

2.02,9.01

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Registration statement under Securities Act of 1933

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Registration statement under Securities Act of 1933

Prospectus Supplement for Delayed or Continuous Offering

Automatic Shelf Registration

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933 (amendment)

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Preliminary Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

GERSTENBERG ERIC W

GERSTENBERG ERIC W

GERSTENBERG ERIC W

Dugas Eric J.

Dugas Eric J.

Dugas Eric J.

GERSTENBERG ERIC W

GERSTENBERG ERIC W

GERSTENBERG ERIC W

Battles Michael Louis

CURTIS GEORGE L

FMR LLC

Robertson Andrea

Robertson Andrea

MCKIM ALAN S

Weber Brian P

MCKIM ALAN S

Gabriel Sharon M.

GERSTENBERG ERIC W

Dugas Eric J.

Annual Report Scanned (Paper)

Annual Report Scanned (Paper)

Annual Report Scanned (Paper)

Annual Report Scanned (Paper)

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Annual Report Scanned (Paper)

Annual Report Scanned (Paper)

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC