Form 8-K

8-K — CASELLA WASTE SYSTEMS INC

Accession: 0000911177-26-000030

Filed: 2026-06-01

Period: 2026-06-01

CIK: 0000911177

SIC: 4953 (REFUSE SYSTEMS)

Item: Other Events

Documents

8-K — cwst-20260601.htm (Primary)

XML — IDEA: XBRL DOCUMENT (R1.htm)

8-K

8-K (Primary)

Filename: cwst-20260601.htm · Sequence: 1

cwst-20260601

0000911177false00009111772026-06-012026-06-01

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

__________________________________________

FORM 8-K

__________________________________________

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): June 1, 2026

__________________________________________

Casella Waste Systems, Inc.

(Exact Name of Registrant as Specified in Charter)

__________________________________________

Delaware 000-23211 03-0338873

(State or Other Jurisdiction

of Incorporation) (Commission

File Number) (IRS Employer

Identification No.)

25 Greens Hill Lane,

Rutland, Vermont 05701

(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code: (802) 775-0325

Not applicable

(Former Name or Former Address, if Changed Since Last Report)

__________________________________________

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading

Symbol(s) Name of each exchange

on which registered

Class A common stock, $0.01 par value per share CWST The Nasdaq Stock Market LLC

(Nasdaq Global Select Market)

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 8.01 Other Events.

On June 1, 2026, Casella Waste Systems, Inc. (the “Company”) closed the remarketing of $15.0 million aggregate principal amount of New York State Environmental Facilities Corporation (the “Issuer”) Solid Waste Disposal Revenue Bonds (Casella Waste Systems, Inc. Project) Series 2014R-2 (collectively, the “Bonds”). The Bonds were issued pursuant to an Indenture dated December 1, 2014 (the “Indenture”) by and between U.S. Bank National Association, as predecessor in interest to U.S. Bank Trust Company, National Association, as trustee (the “Trustee”) and the Issuer, and were drawn down on June 2, 2016. The Bonds have a final maturity date of December 1, 2044. On June 1, 2026, the Bonds were remarketed at an interest rate of 4.300% per annum for an interest rate period ending on June 1, 2036.

The proceeds of the offering of the Bonds were loaned to the Company to finance the purchase of assets for use in the Company’s or its subsidiaries’ operations in the State of New York, and to pay certain costs of issuance of the Bonds pursuant to a Loan Agreement, dated as of December 1, 2014, with the Issuer (the “Loan Agreement”). The Loan Agreement requires the Company to satisfy the obligation to pay amounts from time to time owing with respect to the Bonds issued by the Issuer.

The Bonds are guaranteed by all or substantially all of the subsidiaries of the Company pursuant to an Amended and Restated Guaranty Agreement dated as of June 1, 2016, jointly and severally by and among the guarantors party thereto and the Trustee, as joined, amended and supplemented, and as reaffirmed by a Reaffirmation of Guaranty executed by each guarantor dated June 1, 2026 (the “Guaranty”). Pursuant to the Guaranty, each guarantor will guarantee to the Trustee for the benefit of the owners and beneficial holders of the Bonds the full and prompt payment of (i) the principal of and redemption premium, if any, on the Bonds when and as the same become due; (ii) the interest on the Bonds when and as the same becomes due; (iii) the purchase price of the Bonds tendered or deemed tendered for purchase pursuant to the Indenture; and (iv) all loan payments and purchase price payments due or to become due from the Company under the Loan Agreement (collectively, the “Guaranteed Obligations”). The obligations of each guarantor under the Guaranty will, subject to the release provisions contained therein, remain in full force and effect until the entire principal payment of, redemption premium, if any, and interest on or purchase price of the Bonds has been paid or provided for according to the terms of the Indenture and all other Guaranteed Obligations have been paid and satisfied in full.

The Bonds were issued as tax-exempt bonds. If the Company does not comply with certain of its covenants under the Indenture, Loan Agreement or Tax Compliance Agreement dated December 1, 2014, as supplemented by that certain Supplement to Tax Compliance Agreement dated June 2, 2016 (collectively, the “Tax Certificate”), or if certain representations or warranties made by the Company in the Loan Agreement, Tax Certificate, or in certain related certificates of the Company are false, then the interest on the Bonds may become includable in gross income of the bondholders for federal income tax purposes, retroactively to the date of original issuance of such Bonds. If the Bonds are declared to be taxable or the Loan Agreement is determined to be invalid, the Indenture provides that the Bonds are subject to mandatory redemption at a redemption price equal to 100% of the principal amount thereof, without premium, plus accrued interest to the date of redemption.

SIGNATURE

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 hereunto duly authorized.

CASELLA WASTE SYSTEMS, INC.

Date: June 1, 2026 By: /s/ Bradford J. Helgeson

Bradford J. Helgeson

Executive Vice President and Chief Financial Officer

XML — IDEA: XBRL DOCUMENT

XML

Filename: R1.htm · Sequence: 6

v3.26.1

Cover Page Document

Jun. 01, 2026

Cover [Abstract]

Title of 12(b) Security

Class A common stock, $0.01 par value per share

Entity Address, Address Line One

25 Greens Hill Lane,

Entity Central Index Key

0000911177

Amendment Flag

false

Written Communications

false

Entity Emerging Growth Company

false

Document Type

8-K

Entity Incorporation, State or Country Code

Entity File Number

000-23211

Entity Tax Identification Number

03-0338873

Entity Address, Postal Zip Code

05701

Document Period End Date

Jun. 01, 2026

Entity Registrant Name

Casella Waste Systems, Inc.

Soliciting Material

false

Pre-commencement Tender Offer

false

Pre-commencement Issuer Tender Offer

false

City Area Code

802

Local Phone Number

775-0325

Entity Address, City or Town

Rutland,

Entity Address, State or Province

Trading Symbol

CWST

Security Exchange Name

NASDAQ

- Definition

Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.

+ References

No definition available.

+ Details

Name:

dei_AmendmentFlag

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Area code of city

+ References

No definition available.

+ Details

Name:

dei_CityAreaCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Cover page.

+ References

No definition available.

+ Details

Name:

dei_CoverAbstract

Namespace Prefix:

dei_

Data Type:

xbrli:stringItemType

Balance Type:

Period Type:

duration

- Definition

For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

+ References

No definition available.

+ Details

Name:

dei_DocumentPeriodEndDate

Namespace Prefix:

dei_

Data Type:

xbrli:dateItemType

Balance Type:

Period Type:

duration

- Definition

The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

+ References

No definition available.

+ Details

Name:

dei_DocumentType

Namespace Prefix:

dei_

Data Type:

dei:submissionTypeItemType

Balance Type:

Period Type:

duration

- Definition

Address Line 1 such as Attn, Building Name, Street Name

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine1

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the City or Town

+ References

No definition available.

+ Details

Name:

dei_EntityAddressCityOrTown

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Code for the postal or zip code

+ References

No definition available.

+ Details

Name:

dei_EntityAddressPostalZipCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the state or province.

+ References

No definition available.

+ Details

Name:

dei_EntityAddressStateOrProvince

Namespace Prefix:

dei_

Data Type:

dei:stateOrProvinceItemType

Balance Type:

Period Type:

duration

- Definition

A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityCentralIndexKey

Namespace Prefix:

dei_

Data Type:

dei:centralIndexKeyItemType

Balance Type:

Period Type:

duration

- Definition

Indicate if registrant meets the emerging growth company criteria.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityEmergingGrowthCompany

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

+ References

No definition available.

+ Details

Name:

dei_EntityFileNumber

Namespace Prefix:

dei_

Data Type:

dei:fileNumberItemType

Balance Type:

Period Type:

duration

- Definition

Two-character EDGAR code representing the state or country of incorporation.

+ References

No definition available.

+ Details

Name:

dei_EntityIncorporationStateCountryCode

Namespace Prefix:

dei_

Data Type:

dei:edgarStateCountryItemType

Balance Type:

Period Type:

duration

- Definition

The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityRegistrantName

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityTaxIdentificationNumber

Namespace Prefix:

dei_

Data Type:

dei:employerIdItemType

Balance Type:

Period Type:

duration

- Definition

Local phone number for entity.

+ References

No definition available.

+ Details

Name:

dei_LocalPhoneNumber

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 13e

-Subsection 4c

+ Details

Name:

dei_PreCommencementIssuerTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14d

-Subsection 2b

+ Details

Name:

dei_PreCommencementTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Title of a 12(b) registered security.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b

+ Details

Name:

dei_Security12bTitle

Namespace Prefix:

dei_

Data Type:

dei:securityTitleItemType

Balance Type:

Period Type:

duration

- Definition

Name of the Exchange on which a security is registered.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection d1-1

+ Details

Name:

dei_SecurityExchangeName

Namespace Prefix:

dei_

Data Type:

dei:edgarExchangeCodeItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14a

-Subsection 12

+ Details

Name:

dei_SolicitingMaterial

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Trading symbol of an instrument as listed on an exchange.

+ References

No definition available.

+ Details

Name:

dei_TradingSymbol

Namespace Prefix:

dei_

Data Type:

dei:tradingSymbolItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Securities Act

-Number 230

-Section 425

+ Details

Name:

dei_WrittenCommunications

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration