512 filings
Page 3 of 26
DEFA14A
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14 Apr 22
Additional proxy soliciting materials
3:51pm
8-K
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16 Mar 22
Amendments to Articles of Incorporation or Bylaws
2:41pm
8-K
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23 Feb 22
Clean Harbors Announces Fourth-Quarter and Full-Year 2021 Financial Results
8:52am
8-K
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3 Nov 21
Clean Harbors Announces Third-Quarter 2021 Financial Results
8:55am
8-K
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12 Oct 21
Entry into a Material Definitive Agreement
1:53pm
8-K
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10 Sep 21
Clean Harbors Appoints Marcy Reed to Board of Directors
1:07pm
8-K
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4 Aug 21
Clean Harbors to Acquire HydroChemPSC for $1.25 Billion
8:42am
8-K
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4 Aug 21
Clean Harbors Announces Second-Quarter 2021 Financial Results
8:34am
8-K
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3 Jun 21
Departure of Directors or Certain Officers
12:00am
8-K
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5 May 21
Full Year 2020 by Quarter and Full Year 2019 Unaudited Segment Information
8:30am
8-K
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5 May 21
Clean Harbors Announces First-Quarter 2021 Financial Results
8:05am
DEFA14A
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28 Apr 21
Additional proxy soliciting materials
3:33pm
8-K
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6 Apr 21
Amendments to Articles of Incorporation or Bylaws
3:39pm