Director Burke sells 2,305 Casella (NASDAQ: CWST) shares in open-market trade

Rhea-AI Filing Summary

CASELLA WASTE SYSTEMS INC director Michael K. Burke sold shares in an open-market transaction. On May 26, 2026, he sold 2,305 shares of Class A Common Stock at a weighted average price of $87.56 per share, in multiple trades between $87.45 and $87.69. After this sale, he directly holds 14,048 shares of the company.

Insider Trade Summary

Net Seller: 2,305 shares ($201,826)

Net Sell 1 txn

Insider BURKE MICHAEL K

Role null

Sold 2,305 shs ($202K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	2,305	$87.56	$202K

Holdings After Transaction: Class A Common Stock — 14,048 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 2,305 shares Weighted average sale price: $87.56 per share Post-transaction holdings: 14,048 shares +2 more

5 metrics

Shares sold 2,305 shares Open-market sale on May 26, 2026

Weighted average sale price $87.56 per share Class A Common Stock sale

Post-transaction holdings 14,048 shares Shares directly owned after sale

Sale price range low $87.45 per share Lowest price among multiple trades

Sale price range high $87.69 per share Highest price among multiple trades

Key Terms

open-market sale, Class A Common Stock, weighted average sales price, transaction code "S"

4 terms

open-market sale financial

"transaction_action: "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Class A Common Stock financial

"security_title: "Class A Common Stock""

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

weighted average sales price financial

"Represents the weighted average sales price for shares sold in multiple transactions"

transaction code "S" regulatory

"transaction_code_description: "Sale in open market or private transaction""

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

BURKE MICHAEL K

(Last) (First) (Middle)

C/O CASELLA WASTE SYSTEMS, INC.

25 GREENS HILL LANE

(Street)

RUTLAND VERMONT 05701

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
CASELLA WASTE SYSTEMS INC [ CWST ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/26/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	05/26/2026		S		2,305	D	$87.56(1)	14,048	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents the weighted average sales price for shares sold in multiple transactions, ranging from $87.45 to $87.69. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

Remarks:

	/s/ Shelley E. Sayward, Attorney in Fact for Michael K. Burke	05/27/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did CWST director Michael K. Burke report?

Michael K. Burke reported an open-market sale of 2,305 shares of Casella Waste Systems Class A Common Stock. The transaction occurred on May 26, 2026, and was disclosed as a routine Form 4 insider trading report for a company director.

At what price did Michael K. Burke sell his CWST shares?

Burke sold 2,305 CWST shares at a weighted average price of $87.56 per share. The Form 4 notes individual trades were executed in a price range from $87.45 to $87.69, with detailed trade breakdowns available upon request to the issuer or the SEC staff.

How many CWST shares does Michael K. Burke hold after the reported sale?

Following the May 26, 2026 sale, Burke directly holds 14,048 shares of Casella Waste Systems Class A Common Stock. This post-transaction balance is disclosed in the Form 4 as the total number of shares beneficially owned after completing the open-market sale.

Was the CWST insider transaction a buy or a sell?

The transaction was a sell. The Form 4 lists transaction code “S,” indicating an open-market or private sale, and classifies the direction as a sale of 2,305 shares of Casella Waste Systems Class A Common Stock by director Michael K. Burke.

What does the weighted average price disclosure mean in this CWST Form 4?

The weighted average price of $87.56 means the 2,305 shares were sold in multiple trades between $87.45 and $87.69. The issuer or reporting person will provide the exact number of shares sold at each price level to the SEC staff or security holders upon request.