Wasatch Advisors increases CWST holding to 2.58M shares (CWST)

Rhea-AI Filing Summary

Wasatch Advisors amended its Schedule 13G filing to report beneficial ownership of 2,582,220 shares of Casella Waste Systems Inc. Class A common stock, representing 4.1% of the class. The filing shows sole voting power for 1,764,429 shares and sole dispositive power for 2,582,220 shares. The amendment is signed by Mike Yeates, CEO, dated 04/22/2026.

Key Figures

Beneficial ownership: 2,582,220 shares Percent of class: 4.1% Sole voting power: 1,764,429 shares +2 more

5 metrics

Beneficial ownership 2,582,220 shares Class A common stock

Percent of class 4.1% reported on Schedule 13G/A

Sole voting power 1,764,429 shares sole power to vote or to direct the vote

Sole dispositive power 2,582,220 shares sole power to dispose or direct disposition

Filing signature date 04/22/2026 signature by Mike Yeates, CEO

Key Terms

Schedule 13G/A, beneficially owned, sole dispositive power

3 terms

Schedule 13G/A regulatory

"Amendment No. 1) Casella Waste Systems Inc CL A"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

beneficially owned financial

"Amount beneficially owned: 2,582,220 (b) Percent of class: 4.1 %"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole dispositive power financial

"Sole power to dispose or to direct the disposition of: 2,582,220"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Casella Waste Systems Inc

(Name of Issuer)

CL A

(Title of Class of Securities)

147448104

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 147448104

1

Names of Reporting Persons

Wasatch Advisors LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,764,429.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 2,582,220.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,582,220.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.1 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Casella Waste Systems Inc
(b)	Address of issuer's principal executive offices: 25 Green Hill Road, Rutland, US-VT, 05701, US
Item 2.
(a)	Name of person filing: Wasatch Advisors LP
(b)	Address or principal business office or, if none, residence: 505 Wakara Way, 3rd Floor, Salt Lake City, 84108, United States
(c)	Citizenship: DELAWARE
(d)	Title of class of securities: CL A
(e)	CUSIP No.: 147448104
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 2,582,220
(b)	Percent of class: 4.1 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1,764,429
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 2,582,220
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Wasatch Advisors LP

Signature:	Mike Yeates
Name/Title:	CEO
Date:	04/22/2026

FAQ

What stake does Wasatch Advisors report in CWST?

Wasatch Advisors reports beneficial ownership of 2,582,220 shares (4.1%). The Schedule 13G/A shows this is Class A common stock with the percentage calculated on the relevant class; voting and dispositive power details are included in the filing.

How much voting power does Wasatch Advisors hold in CWST?

Wasatch Advisors has sole voting power over 1,764,429 shares. The filing also lists zero shared voting power and sole dispositive power for 2,582,220 shares, per the amendment signed 04/22/2026.

Does Wasatch Advisors control how CWST shares are sold?

The filing lists sole dispositive power for 2,582,220 shares, indicating control over disposition. The Schedule 13G/A format reports beneficial ownership and voting/dispositive powers as of the amendment filing.

Is Wasatch Advisors' 4.1% stake considered an activist position in CWST?

The filing classifies the holder as owning 5 percent or less of the class. Schedule 13G/A is typically used for passive investors; the filing does not state activist intent or any plans to influence management.

When was the Schedule 13G/A amendment signed for CWST?

The amendment was signed by Mike Yeates, CEO, on 04/22/2026. The filing identifies Wasatch Advisors as the reporting person and provides its Salt Lake City address and Delaware citizenship.