BlackRock (NYSE: BLK) reports 14.3% Casella Waste Systems ownership stake

Rhea-AI Filing Summary

BlackRock, Inc. filed an amended Schedule 13G reporting passive ownership of Casella Waste Systems Inc. Class A stock as of 12/31/2025. BlackRock reports beneficial ownership of 8,928,731 shares, representing 14.3% of this share class, with sole voting power over 8,804,258 shares and sole dispositive power over the full 8,928,731 shares. The filing notes that these holdings reflect certain BlackRock business units and that iShares Core S&P Small-Cap ETF alone holds more than five percent of Casella’s outstanding common stock. BlackRock certifies the position is held in the ordinary course of business and not for the purpose of changing or influencing control of Casella.

Insights

Institutional ownership and governance analyst

BlackRock reports a sizeable, passive 14.3% stake in Casella Waste Systems.

BlackRock, Inc. discloses beneficial ownership of 8,928,731 Casella Waste Systems Class A shares, equal to 14.3% of the class as of 12/31/2025. It holds sole voting power over 8,804,258 shares and sole dispositive power over the full amount, indicating centralized decision-making authority within the reporting business units.

The filing is made on a Schedule 13G basis, and BlackRock certifies the position is held in the ordinary course of business and not with the purpose or effect of changing or influencing control. The disclosure highlights that certain business units are aggregated for reporting, while others are disaggregated, and that iShares Core S&P Small-Cap ETF alone holds more than five percent of Casella’s common stock.

This indicates significant index or fund-based institutional ownership in Casella Waste Systems, with voting and sale decisions concentrated at BlackRock’s reporting units. Future company communications and proxy materials may show how this large passive holder votes its shares on key matters at or after 12/31/2025.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 14)

CASELLA WASTE SYSTEMS INC

(Name of Issuer)

Class A Stock

(Title of Class of Securities)

147448104

(CUSIP Number)

12/31/2025

(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)

SCHEDULE 13G

CUSIP No. 147448104

1

Names of Reporting Persons

BlackRock, Inc.

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 8,804,258.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 8,928,731.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

8,928,731.00

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)

14.3 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: CASELLA WASTE SYSTEMS INC
(b)	Address of issuer's principal executive offices: 25 GREENS HILL ROAD RUTLAND VT 05701
Item 2.
(a)	Name of person filing: BlackRock, Inc. In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release.
(b)	Address or principal business office or, if none, residence: BlackRock, Inc., 50 Hudson Yards New York, NY 10001
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Class A Stock
(e)	CUSIP No.: 147448104
Item 4.	Ownership
(a)	Amount beneficially owned: 8928731
(b)	Percent of class: 14.3 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 8804258
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 8928731
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The interest of 1 such person, iShares Core S&P Small-Cap ETF, in the common stock of CASELLA WASTE SYSTEMS INC is more than five percent of the total outstanding common stock.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99
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.

BlackRock, Inc.

Signature:	Spencer Fleming
Name/Title:	Managing Director
Date:	01/08/2026

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7

FAQ

How many Casella Waste Systems shares does BlackRock (BLK) report owning?

BlackRock reports beneficial ownership of 8,928,731 shares of Casella Waste Systems Inc. Class A stock. It has sole voting power over 8,804,258 of those shares and sole dispositive power over all 8,928,731 shares.

What percentage of Casella Waste Systems’ Class A stock does BlackRock (BLK) hold?

BlackRock states that its 8,928,731 Casella Waste Systems Class A shares represent 14.3% of that class as of the 12/31/2025 event date.

Is BlackRock’s Casella Waste Systems position reported as passive or active?

BlackRock certifies that the Casella Waste Systems securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of the issuer, consistent with a Schedule 13G passive ownership filing.

Which BlackRock entity holds more than 5% of Casella Waste Systems stock?

The filing notes that iShares Core S&P Small-Cap ETF has an interest in Casella Waste Systems common stock that is more than five percent of the total outstanding common stock.

What is the date of the ownership event reported by BlackRock for Casella Waste Systems?

The Schedule 13G/A identifies 12/31/2025 as the Date of Event that requires the ownership reporting for Casella Waste Systems Inc.

Who signed the BlackRock (BLK) Schedule 13G/A related to Casella Waste Systems?

The statement is signed by Spencer Fleming, identified as a Managing Director, certifying that the information in the filing is true, complete, and correct.