CASELLA WASTE SYSTEMS INC

For the period ended Sep 30, 2026. Filed Nov 9, 2026.

About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 30, 2026 · Filed Nov 9, 2026

CWST$99.02+0.8%Stored close · as of Nov 9, 2026

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Contents

Item 6. EXHIBITS

ExhibitNo.	Description
10.1 +	Employment Agreement between Casella Waste Systems, Inc. and Damian A. Ribar dated as of July 20, 2026 (incorporated herein by reference to Exhibit 10.2 to the quarterly report on Form 10-Q of Casella as filed on August 7, 2026 (file no. 000-23211)).
31.1 +	Certification of Principal Executive Officer, pursuant to Section 302 of the Sarbanes – Oxley Act of 2002.
31.2 +	Certification of Principal Financial Officer, pursuant to Section 302 of the Sarbanes – Oxley Act of 2002.
32.1 ++	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes- Oxley Act of 2002.
32.2 ++	Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes- Oxley Act of 2002.
101.INS	The instance document does not appear in the interactive data file because its XBRL tags are embedded within the inline XBRL document.
101.SCH +	Inline XBRL Taxonomy Extension Schema Document.
101.CAL +	Inline XBRL Taxonomy Calculation Linkbase Document.
101.LAB +	Inline XBRL Taxonomy Label Linkbase Document.
101.PRE +	Inline XBRL Taxonomy Presentation Linkbase Document.
101.DEF +	Inline XBRL Taxonomy Extension Definition Linkbase Document.
104	Cover Page Interactive Data File (formatted as inline XBRL with applicable taxonomy extension information contained in Exhibits 101.)

+	Filed Herewith
++	Furnished Herewith

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Casella Waste Systems, Inc.
Date: November 9, 2026	By: /s/ Kevin Drohan
	Kevin Drohan
	Vice President and Chief Accounting Officer
	(Principal Accounting Officer)
Date: November 9, 2026	By: /s/ Bradford J. Helgeson
	Bradford J. Helgeson
	Executive Vice President and Chief Financial Officer
	(Principal Financial Officer)

ContentsView on SEC.gov

The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.