CASELLA WASTE SYSTEMS INC

For the period ended Jun 30, 2026. Filed Aug 7, 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.

Jun 30, 2026 · Filed Aug 7, 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 +	Offer Letter between Casella Waste Systems, Inc. and Damian A. Ribar dated as of June 27, 2026.
10.2 +	Employment Agreement between Casella Waste Systems, Inc. and Damian A. Ribar dated as of July 20, 2026.
10.3	Master Lease No. 68105 (Co-Lessee) dated April 20, 2026 by and between Huntington National Bank and Casella Waste Systems, Inc. (incorporated herein by reference to Exhibit 10.1 to the current report on Form 8-K of Casella as filed on April 22, 2026 (file no. 000-23211)).
10.4	Addendum to Master Lease Agreement No. 68105 (Co-Lessee) dated April 20, 2026 by and among Huntington National Bank, Casella Waste Systems, Inc., and the subsidiaries of Casella Waste Systems, Inc. party thereto (incorporated herein by reference to Exhibit 10.2 to the current report on Form 8-K of Casella as filed on April 22, 2026 (file no. 000-23211)).
10.5	Interim Agreement No. 1 dated April 20, 2026 by and among Huntington National Bank, Casella Waste Systems, Inc. and the subsidiaries of Casella Waste Systems, Inc. party thereto (incorporated herein by reference to Exhibit 10.3 to the current report on Form 8-K of Casella as filed on April 22, 2026 (file no. 000-23211)).
10.6	Form of Performance-Based Stock Unit Agreement under Amended and Restated 2016 Incentive Plan (employee with employee contract) adopted April 2026 (incorporated herein by reference to Exhibit 10.7 to the quarterly report on Form 10-Q of Casella as filed on May 1, 2026 (file no. 000-23211)).
10.7	Form of Performance-Based Stock Unit Agreement under Amended and Restated 2016 Incentive Plan (employee with no employee contract) adopted April 2026 (incorporated herein by reference to Exhibit 10.8 to the quarterly report on Form 10-Q of Casella as filed on May 1, 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.)

*	Submitted Electronically Herewith. Attached as Exhibit 101 to this report are the following formatted in inline XBRL (Extensible Business Reporting Language): (i) Consolidated Balance Sheets as of June 30, 2026 and December 31, 2025, (ii) Consolidated Statements of Operations for the three and six months ended June 30, 2026 and 2025, (iii) Consolidated Statements of Comprehensive Income (Loss) for the three and six months ended June 30, 2026 and 2025, (iv) Consolidated Statements of Stockholders’ Equity for the three and six months ended June 30, 2026 and 2025, (v) Consolidated Statements of Cash Flows for the six months ended June 30, 2026 and 2025, and (vi) Notes to Consolidated Financial Statements.
+	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: August 7, 2026	By: /s/ Kevin Drohan
	Kevin Drohan
	Vice President and Chief Accounting Officer
	(Principal Accounting Officer)
Date: August 7, 2026	By: /s/ Bradford J. Helgeson
	Bradford J. Helgeson
	Executive Vice President and Chief Financial Officer
	(Principal Financial Officer)

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