West Street Infrastructure Partners III Acquires Synagro Technologies from EQT Infrastructure

Synagro Technologies Acquires New England Fertilizer Company (NEFCO)

November 29, 2023

Environmental Services

Synagro Technologies, Inc. has acquired New England Fertilizer Company (NEFCO), a Massachusetts-based biosolids management company, in a strategic transaction that expands Synagro's thermal-drying and beneficial-use capabilities. The deal adds five large facilities and several major municipal clients to Synagro's network, advancing its circular-economy offerings and capacity for biosolids beneficial use.

Goldman Sachs Asset Management Invests in Synthica Energy

August 7, 2023

Renewable Energy

Synthica Energy, an anaerobic digestion developer converting pre-consumer organic waste into renewable natural gas (RNG), closed a large equity investment from the Infrastructure Business within Goldman Sachs Asset Management. The capital will be used to scale Synthica's build-own-operate facilities and accelerate project development across several U.S. markets including Ohio, Texas, Georgia, Kentucky, and Louisiana.

EQT Infrastructure VI Agrees to Acquire Seven Seas Water Group from Morgan Stanley Infrastructure Partners

May 22, 2025

Utilities

EQT Infrastructure VI has agreed to acquire Seven Seas Water Group, a developer, owner and operator of water and wastewater treatment plants across the U.S., Caribbean and Latin America, from Morgan Stanley Infrastructure Partners. The deal will support Seven Seas’ growth and operational optimization under EQT’s ownership, leveraging EQT’s infrastructure expertise and digital capabilities to expand the Company’s Water-as-a-Service platform.

Concentric Equity Partners and Summer Street Capital Acquire Majority Stake in Frontier Waste Solutions

November 21, 2022

Environmental Services

Concentric Equity Partners and Summer Street Capital Partners led a global investment group that purchased a majority stake in Frontier Waste Solutions from Blue Sage Capital. The transaction recapitalizes Frontier to support continued geographic growth across Texas and capability expansion including further vertical integration and materials processing; Frontier's founders and managers remain significant owners.

Synagro Technologies Acquires LimeCorp, LTD

January 4, 2022

Environmental Services

Synagro Technologies, Inc. has acquired LimeCorp, LTD, an Ohio-based provider of lime-residual management and land-application services. The deal expands Synagro's biosolids and residuals capabilities in Ohio and broadens its industrial and municipal customer base in the region.

3i-backed Bioprocessing Platform Acquires Sani-Tech West, Inc.

July 28, 2020

Biotechnology

3i Group's single-use bioprocessing platform has acquired Sani-Tech West, Inc., a Camarillo, California-based manufacturer and distributor of single-use bioprocessing systems and components. The deal adds Sani-Tech's ~170 employees, cleanroom manufacturing footprint and product lines (bottles, caps, tubing, fittings and assemblies) to 3i's existing platform (including Cellon, Silicone Altimex and TBL), enhancing global manufacturing capacity, supply-chain assurance and product breadth for biopharma customers.