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Casella Waste Systems Inc

CWST
Exchange
Nasdaq
Industry
Refuse Systems
SEC CIK
0000911177

In the last 90 days, Casella Waste Systems Inc insiders filed 0 open-market purchases and 3 sales; 420 institutions reported holding it in 13F filings for Q2 2026, worth $7.49B in total; no superinvestor holds it.

Holders of 5% or more of CWST

Holders whose latest Schedule 13D or 13G filing reports 5% or more of Casella Waste Systems Inc, largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of CWST
HolderLatest formStakeChangeFirst filedLatest filingFiling
BlackRock, Inc.13G/A14.30%8.93M shares–Jan 8, 20261 filingJan 8, 2026SEC
Conestoga Capital Advisors, LLC13G/A5.51%3.43M shares–Jan 6, 20215 filingsJan 10, 2025SEC
Vanguard Portfolio Management LLC13G5.45%3.41M sharesNewApr 29, 20261 filingApr 29, 2026SEC
Vanguard Capital Management LLC13G5.23%3.28M sharesNewApr 29, 20261 filingApr 29, 2026SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

31 Schedule 13D and 13G filings on Casella Waste Systems Inc, newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on CWST
Filed (ET)FilerFormStakeChangeEvent dateFiling
Oct 9, 20262:55 PM ETWasatch Advisors Inc13G/A4.90%3.06M shares−0.70 ppfrom 5.60%Below 5%Sep 30, 2026SEC
Jul 9, 20261:51 PM ETWasatch Advisors Inc13G5.60%3.53M shares+1.50 ppfrom 4.10%Jun 30, 2026SEC
Apr 29, 20265:47 PM ETVanguard Capital Management LLC13G5.23%3.28M sharesNewMar 31, 2026SEC
Apr 29, 202612:32 PM ETVanguard Portfolio Management LLC13G5.45%3.41M sharesNewMar 31, 2026SEC
Apr 22, 20265:39 PM ETWasatch Advisors Inc13G/A4.10%2.58M shares−1.40 ppfrom 5.50%Below 5%Mar 31, 2026SEC
Mar 26, 20264:40 PM ETVanguard Group Inc13G/A0.00%0 shares−10.51 ppfrom 10.51%Below 5%Mar 13, 2026SEC
Jan 8, 20261:28 PM ETBlackRock, Inc.13G/A14.30%8.93M shares–Dec 31, 2025SEC
Jan 7, 20262:59 PM ETVanguard Group Inc13G/A10.51%6.57M shares–Dec 31, 2025SEC
Aug 14, 202512:43 PM ETWasatch Advisors Inc13G5.50%3.41M sharesNewJun 30, 2025SEC
Jan 10, 202511:25 AM ETConestoga Capital Advisors, LLC13G/A5.51%3.43M shares–Dec 31, 2024SEC
Nov 14, 2024William Blair Investment Management, LLC13G/AOld format–––SEC
Feb 13, 2024Vanguard Group Inc13G/AOld format–––SEC
Feb 12, 2024William Blair Investment Management, LLC13GOld format–New–SEC
Jan 26, 20244:23 PM ETBlackRock Inc.13G/AOld format–––SEC
Jan 5, 2024Conestoga Capital Advisors, LLC13G/AOld format–––SEC
Jul 10, 2023Earnest Partners LLC13G/AOld format–––SEC
Feb 14, 2023Earnest Partners LLC13G/AOld format–––SEC
Feb 9, 2023Vanguard Group Inc13G/AOld format–––SEC
Jan 31, 20235:52 PM ETBlackRock Inc.13G/AOld format–––SEC
Jan 18, 2023Conestoga Capital Advisors, LLC13G/AOld format–––SEC
Feb 11, 2022Earnest Partners LLC13G/AOld format–––SEC
Feb 9, 2022Vanguard Group Inc13G/AOld format–––SEC
Feb 1, 20225:08 PM ETBlackRock Inc.13G/AOld format–––SEC
Jan 26, 2022Wells Fargo & Company13G/AOld format–––SEC
Jan 10, 2022Conestoga Capital Advisors, LLC13G/AOld format–––SEC
Feb 16, 2021Earnest Partners LLC13G/AOld format–––SEC
Feb 12, 2021Wells Fargo & Company13G/AOld format–––SEC
Feb 10, 2021Vanguard Group Inc13GOld format–New–SEC
Feb 10, 2021Renaissance Technologies LLC13G/AOld format–––SEC
Jan 28, 20215:56 PM ETBlackRock Inc.13G/AOld format–––SEC
Jan 6, 2021Conestoga Capital Advisors, LLC13GOld format–New–SEC

Form 144: proposed insider sales

63 notices from officers, directors and other affiliates planning to sell Casella Waste Systems Inc shares, newest first.

Form 144 notices for CWST
Filed (ET)SellerShares to sellMarket valuePlanned saleBrokerFiling
Nov 9, 20263:27 PM ETHelgeson Bradford JohnOfficer195$19.2KNov 9, 2026Raymond James & Associates, Inc.SEC
Sep 3, 20265:53 PM ETMichael BurkeDirector1.10K$105.6KSep 3, 2026Goldman Sachs & Co. LLCSEC
Aug 26, 20264:42 PM ETMichael BurkeDirector1.10K$103.1KAug 26, 2026Goldman Sachs & Co. LLCSEC
Aug 14, 20265:08 PM ETDouglas CasellaDirector1.34K$121.8KAug 14, 2026Goldman Sachs & Co. LLCSEC
Aug 13, 20265:12 PM ETCasella Douglas ROfficer · Director1.84K$167.0KAug 13, 2026Raymond James and AssociatesSEC
Aug 13, 20264:37 PM ETDouglas CasellaDirector13.3K$1.21MAug 13, 2026Goldman Sachs & Co. LLCSEC
May 26, 20265:10 PM ETMichael BurkeDirector2.31K$200.8KMay 26, 2026Goldman Sachs & Co. LLCSEC
May 19, 20265:19 PM ETEdmond ColettaOfficer4.91K$425.6KMay 19, 2026Goldman Sachs & Co. LLCSEC
May 19, 20261:30 PM ETColetta EdmondOfficer7.59K$677.4KMay 19, 2026Raymond James & AssociatesSEC
Mar 16, 20264:50 PM ETColetta EdmondOfficer988$86.8KMar 16, 2026Raymond James & AssociatesSEC
Mar 16, 20264:45 PM ETJohn W. CasellaOfficer1.74K$153.1KMar 16, 2026Raymond James & Associates, Inc.SEC
Mar 16, 20264:08 PM ETHelgeson Bradford JohnOfficer405$35.5KMar 16, 2026Raymond James & AssociatesSEC
Mar 16, 20264:04 PM ETSteves SeanOfficer197$17.3KMar 16, 2026Raymond James & AssociatesSEC
Mar 16, 20263:58 PM ETDrohan KevinOfficer85$7.46KMar 16, 2026Raymond James & AssociatesSEC
Mar 16, 20263:45 PM ETSayward Shelley E.Officer362$31.8KMar 16, 2026Raymond James & AssociatesSEC
Mar 12, 20264:12 PM ETCasella John WOfficer963$86.7KMar 12, 2026RAYMOND JAMES & ASSOCIATES, INC.SEC
Mar 12, 20263:09 PM ETColetta EdmondOfficer377$33.8KMar 12, 2026RAYMOND JAMES & ASSOCIATES, INC.SEC
Mar 12, 20262:55 PM ETSteves SeanOfficer97$8.66KMar 12, 2026RAYMOND JAMES & ASSOCIATES, INC.SEC
Mar 12, 20261:39 PM ETSayward Shelley E.Officer129$11.5KMar 12, 2026RAYMOND JAMES & ASSOCIATES, INC.SEC
Mar 12, 20261:11 PM ETDrohan KevinOfficer55$4.88KMar 12, 2026Raymond James & AssociatesSEC
Feb 27, 20263:52 PM ETCasella John WOfficer6.90K$644.1KFeb 27, 2026Raymond James & AssociatesSEC
Feb 27, 20262:46 PM ETSayward Shelley E.Officer1.59K$147.8KFeb 27, 2026Raymond James & AssociatesSEC
Feb 27, 20262:41 PM ETSteves SeanOfficer1.20K$111.4KFeb 27, 2026Raymond James & AssociatesSEC
Feb 27, 20262:37 PM ETColetta EdmondOfficer4.00K$375.8KFeb 27, 2026Raymond James & AssociatesSEC
Feb 27, 20262:31 PM ETDrohan KevinOfficer675$62.5KFeb 27, 2026Raymond James & AssociatesSEC

Showing the latest 25. See the CWST notices from the last 12 months