Casella Waste Systems Acquires Star Waste Systems (Boston-area)

Casella Waste Systems Acquires Mountain State Waste

July 14, 2025

Environmental Services

Casella Waste Systems is acquiring Mountain State Waste to expand Casella’s operations into additional regions of West Virginia, Ohio, and Kentucky and to strengthen its existing footprint in Pennsylvania. The deal is expected to close in the fourth quarter pending regulatory approvals and is expected to generate approximately $30 million of annualized revenues.

Casella Waste Systems Acquires Royal Carting and Welsh Sanitation

September 9, 2024

Environmental Services

Casella Waste Systems, Inc. has entered into a definitive agreement to acquire Royal Carting and Welsh Sanitation, including related real estate assets. The transaction (expected to close in Q4 subject to customary conditions) adds two collection operations and two transfer stations in New York's Hudson Valley and western Connecticut, and is expected to generate over $90 million in annualized revenues while expanding Casella's regional footprint.

Casella Waste Systems Acquires Assets of Consolidated Waste Services (Twin Bridges)

June 9, 2023

Environmental Services

Casella Waste Systems, Inc. signed an asset purchase agreement to acquire the assets of Consolidated Waste Services, LLC (dba Twin Bridges) for approximately $219 million in cash. The deal includes two collection operations, a transfer station, a materials recovery facility (MRF) and other properties, and is expected to generate about $70 million of annualized revenue and close by Q4 2023.

Casella Waste Systems Acquires Select Solid Waste Operations from GFL Environmental for $525M

April 24, 2023

Environmental Services

Casella Waste Systems agreed to acquire collection, transfer and recycling operations in Pennsylvania, Delaware and Maryland from GFL Environmental Inc. for $525 million. The assets include nine hauling operations, one transfer station and one material recovery facility with approximately $185 million of annualized revenues (and an expected ~$43 million of EBITDA), and the deal is intended to expand Casella's Mid‑Atlantic footprint and provide a platform for future growth; closing was expected by Q3 2023 subject to customary conditions.

Clairvest (with Ironwood) Invests in Star Waste Systems (Boston Carting Services)

July 1, 2022

Environmental Services

Clairvest Group Inc., through Clairvest Equity Partners VI, made an equity investment to acquire a majority interest in Star Waste Systems (dba Boston Carting Services). Ironwood Capital, an existing investor, participated in the transaction/recapitalization. The deal will support Star Waste’s growth in the Greater Boston market and expand its waste collection and materials-recovery capabilities.

Casella Waste Systems Acquires Willimantic Waste Paper Co., Inc.

July 26, 2021

Environmental Services

Casella Waste Systems, Inc. (NASDAQ: CWST) acquired Willimantic Waste Paper Co., Inc., a Connecticut-based residential, commercial and roll-off collection and recycling operator, on July 26, 2021. The acquisition expands Casella's footprint into eastern Connecticut and adds a rail-served C&D processing/waste transfer facility and single-stream recycling operations, representing roughly $62 million of annualized revenues.