Macquarie Asset Management Acquires Majority Stake in Southern Water

Macquarie Asset Management-Led Consortium to Acquire Majority Stake in SI Solutions

September 10, 2026

Engineering Services

Macquarie Asset Management, alongside co-investors including UniSuper, agreed to acquire a majority stake in SI Solutions from MidOcean Partners. SI provides engineering, testing, inspection, and software solutions for critical infrastructure operators; the transaction is expected to close in Fall 2026, subject to regulatory approvals and customary closing conditions.

Macquarie Asset Management Leads Up to £1.2bn Equity Support Package for Southern Water

July 1, 2025

Utilities

A consortium led by Macquarie Asset Management has committed an initial £655 million of binding equity to Southern Water, with intent to provide up to a further £545 million by December 2025 (totaling up to £1.2 billion). The equity injection will fund Southern Water's 2025–2030 investment programme and help reduce legacy holding debt to improve the company's financial resilience.

Macquarie Asset Management Acquires Remaining 20% of National Gas

July 26, 2024

Energy

Macquarie Asset Management, via a consortium of its managed equity and funds, has exercised its option to acquire the remaining 20% equity stake in National Gas from National Grid, giving the consortium 100% ownership. The move secures full control to support National Gas’s operation of the UK gas transmission network and accelerate future initiatives such as hydrogen network development and other decarbonisation projects.

Macquarie Asset Management-led consortium to acquire further 20% stake in National Gas

July 19, 2023

Energy

A consortium led by Macquarie Asset Management has agreed to acquire an additional 20% equity interest in National Gas from National Grid, taking the consortium's total ownership to 80%. The deal, on equivalent terms to the original January 2023 transaction, is subject to regulatory clearance and is expected to complete in the second half of 2023; the consortium also holds an option to acquire the remaining 20% between May and July 2024.

Macquarie Asset Management Recapitalizes Coastal Waste & Recycling

June 20, 2023

Environmental Services

A fund managed by Macquarie Asset Management has completed the recapitalization of Coastal Waste & Recycling and become the company's majority owner. Coastal, a vertically integrated solid waste and recycling operator headquartered in Boca Raton, Florida, will continue to be led by CEO Brendon Pantano while prior investors Summer Street Capital Partners and Concentric Equity Partners exit and retain a minority stake alongside management.

Macquarie Asset Management Acquires Beauparc Utilities

June 1, 2021

Environmental Services

Macquarie Asset Management, via Macquarie European Infrastructure Fund 6, has agreed to acquire Beauparc Utilities from founder Eamon Waters and Blackstone Tactical Opportunities Fund. Beauparc is a leading waste-to-resource and recycling business operating across Ireland, the UK and the Netherlands, with more than 2,300 employees and a portfolio of about 40 waste facilities; Macquarie intends to invest to grow its circular-economy capabilities.