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Stonbury

Specialist contractor delivering sustainable water infrastructure

Overview

Stonbury is a specialist contractor in the water industry that designs, supplies, and delivers water infrastructure and environmental solutions for water utilities and public sector clients. It uses direct delivery, managing projects in-house from start to finish, to ensure high quality and efficiency while applying sustainable and low-carbon practices. What sets Stonbury apart is its combination of in-house project control, a clear focus on sustainability and environmental responsibility, a track record of awards and certifications, and a commitment to an inclusive, continuously trained workforce. The company's goal is to help provide clean, safe drinking water by delivering reliable, sustainable solutions and reducing the industry’s carbon footprint.

Significant Headcount Growth

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About Stonbury

Simplify's Rating
Why Stonbury is rated
B-
Rated B on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Industrial & ManufacturingGovernment & Public SectorEnergy

Company Size

201-500

Company Stage

N/A

Total Funding

N/A

Headquarters

Luton, United Kingdom

Founded

1983

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Simplify Jobs

Simplify's take

What believers are saying

  • Revenue rose 74% to £78 million since December 2022.
  • October and November 2026 deals added Thompsons Group and MTS, bringing 80 employees.
  • The September 2026 LDC and Federated Hermes round funds expansion and acquisitions.

What critics are saying

  • Thirty-seven customer frameworks tie growth to UK utility procurement cycles.
  • Integration of Thompsons Group and MTS distracts management through 2027.
  • Failed integrations and debt pressure trap LDC with a fragmented contractor.

What makes Stonbury unique

  • Stonbury combines water, wastewater, environment, and MEICA services under one contractor.
  • Its direct-delivery model keeps specialist crews in-house across 10 locations.
  • LDC and Federated Hermes back a buy-and-build platform, not a single-project shop.

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Benefits

  • Paid Vacation
  • Health Insurance
  • Gym Membership
  • Dental Insurance
  • Employee Discounts
  • Parental Leave
  • Life Insurance
  • Disability Insurance
  • Commuter Benefits
  • Training Programs

Growth & Insights and Company News

6 month growth

15%

1 year growth

15%

2 year growth

15%
Insider Media
Nov 4th, 2026
LDC-backed Stonbury makes second acquisition in a fortnight to expand engineering services

Stonbury, a Bedfordshire-based water and environmental sustainability specialist, has made its second acquisition in two weeks. The company is backed by private equity firm LDC. The deal aims to broaden Stonbury's service offering and expand its engineering capabilities.

LDC
Nov 4th, 2026
LDC-backed Stonbury expands engineering capabilities with acquisition of MTS.

LDC-backed Stonbury expands engineering capabilities with acquisition of MTS. 4 Nov 2026 Stonbury, the leading UK water and environmental sustainability specialist, has acquired MEICA Technical Services (MTS) to further diversify its service offering, bring 30 skilled employees into the business and further broaden its UK footprint. The transaction marks the second acquisition Stonbury has completed in two weeks, following the acquisition of arboricultural and environmental services specialist, Thompsons Group. Headquartered in Bedfordshire, Stonbury delivers innovative, low-carbon solutions to maintain, repair and refurbish critical water assets - from drinking water provision to wastewater treatment. The business also delivers nature-based solutions including river restoration and natural flood management. Since December 2022, private equity investor LDC has supported Stonbury's expansion across wastewater, environment and technology services. The acquisition of MTS represents the latest step in the business' ongoing buy and build strategy and follows a new round of investment from LDC and new minority co-investor Federated Hermes in September 2026. MTS is an Oxford-based specialist delivering turnkey solutions for Mechanical, Electrical, Instrumentation, Control, and Automation (MEICA) projects nationwide, with a primary focus on electrical solutions. They provide end-to-end services including design, engineering, installation, testing and commissioning for the water and utilities sectors. The acquisition strengthens Stonbury's capability to deliver integrated environmental solutions to its customers. All employees, including MTS co-founders Steve and Clare Stone, will remain with Stonbury and are committed to supporting its continuing growth journey. Colin Perry-Davis, CEO of Stonbury, said: "MTS is a business we've admired for some time and we're excited to welcome Steve, Clare and their talented team to Stonbury. They have built an outstanding reputation for technical excellence and client service and we're looking forward to combining our strengths to support customers across an even wider range of water and environmental infrastructure projects." Their extensive MEICA engineering expertise will further diversify its offering and their strong client relationships across sectors will further strengthen its market position." Colin Perry-Davis, CEO Stonbury Steve Stone, Managing Director at MTS, added: "From our first conversations, it was clear that MTS and Stonbury share a commitment to technical excellence and sustainable solutions, and Stonbury's scale and resources will create new opportunities for our team. We're looking forward to contributing our expertise to a business that's reshaping how the UK manages its critical water and environmental infrastructure." David Bains, Partner and Head of East Midlands and East of England at LDC, added: "Stonbury has evolved significantly over the last few years, expanding its capabilities and range of services. The addition of MTS further strengthens its customer proposition, bringing highly complementary engineering expertise and enhancing the group's ability to support complex infrastructure projects across the water sector. We're pleased to support Colin and the team as they continue to build a more diversified business." Stonbury and LDC were advised by Provantage Corporate Finance, Howes Percival and RSM UK Consulting, MTS was advised by RWK Goodman, Watersheds and The Academy Partnership.

The Business Desk
Oct 20th, 2026
LDC-backed Stonbury snaps up Derbyshire environmental specialist.

LDC-backed Stonbury snaps up Derbyshire environmental specialist. October 21 2026 LDC-backed water and environmental specialist Stonbury has acquired Derbyshire-based Thompsons Group as it steps up its buy-and-build strategy. The deal brings 50 employees into Stonbury and expands the Bedfordshire-headquartered company's capabilities into arboriculture and environmental services. It follows a new round of investment in Stonbury from private equity firm LDC, alongside new minority co-investor Federated Hermes. Financial terms of the acquisition have not been disclosed. Thompsons Group provides commercial... You can carry on reading TheBusinessDesk.com for free, but you have reached the maximum number of pages an unregistered user can view. To register for an account, click here or login below...

PE Hub
Sep 30th, 2026
LDC reinvests in UK water specialist Stonbury, with Federated Hermes co-investing.

LDC reinvests in UK water specialist Stonbury, with Federated Hermes co-investing. Bedfordshire-based Stonbury maintains and repairs water assets, and its revenue has risen 74 percent to £78 million since 2022. 49 minutes ago

Insider Media
Sep 30th, 2026
Water specialist Stonbury secures fresh investment from LDC

Stonbury, a water and environmental sustainability specialist, has secured additional investment from private equity firm LDC. The funding round was led by David Bains, who was named Insider's East Midlands Dealmaker of the Year. The investment marks a continuation of LDC's support for the company, though specific financial details were not disclosed. Stonbury operates in the water sector, focusing on environmental sustainability solutions.

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