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BCS

Notice of Proposed Sale · 144

Casella Waste Systems, Inc.

CWSTNASDAQEQUITYCurrent

Notice of Proposed Sale

Filed Aug 14, 2026Accepted Aug 14, 2026, 5:08 PM EDTFiling CIK 911177Accession 0001958244-26-000510
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Structured filing — 144

primary_doc.xml

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Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.

Proposed-sale notice

Issuer
Casella Waste Systems, Inc.
Issuer CIK
0000911177
SEC file number
000-23211
Phone
1-802-775-0325
Person for whose account securities are to be sold
Douglas Casella
Relationships to issuer
Director
Street
25 Greens Hill Lane
City
Rutland
State / country code
VT
Postal code
05701

Securities proposed for sale

Securities proposed for sale · 1 reported row
SecurityProposed unitsAggregate market valueUnits outstandingApproximate sale dateExchangeBroker / market maker
Common1,343121,836.9662,651,84608/14/2026NASDGoldman Sachs & Co. LLC

Broker / market maker — proposed row 1, entry 1

Name
Goldman Sachs & Co. LLC
Street
200 West Street
City
New York
State / country code
NY
Postal code
10282

Acquisition of securities to be sold

Acquisition of securities to be sold · 1 reported row
SecurityAcquiredNature of acquisitionAcquired fromAmount acquiredGift transactionPayment dateNature of payment
Common10/28/1997Acquired from issuer in private transactionIssuer1,343N10/28/1997None

Sales reported in the preceding three months

Sales reported in the preceding three months · 1 reported row
SellerSecuritySale dateAmount soldGross proceeds
Douglas CasellaCommon08/13/202613,3191,212,661.97

Seller — prior-sale row 1, entry 1

Name
Douglas Casella
Street
25 Greens Hill Lane
City
Rutland
State / country code
VT
Postal code
05701

Prior-sale reporting

Nothing to report for the preceding three months
N

Notice signature

Notice date
08/14/2026
Signed
Goldman Sachs & Co. LLC on behalf of Douglas Casella

Company context

Current securities

Recent company filings

  1. SCHEDULE 13G/A - filed by WASATCH ADVISORS LP regarding CASELLA WASTE SYSTEMS INCOct 9, 2026
  2. Regulation FD DisclosureOct 1, 2026
  3. 144 filingSep 3, 2026
  4. 4 filingSep 3, 2026
  5. 144 filingAug 26, 2026

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