Wallingford, Oxfordshire, February 9th 2026 – Vesta Software Group (“Vesta”), is pleased to announce the acquisition of Pollution Monitors Ltd. (“Pollution Monitors”), a UK market leader in the design, supply, installation, and servicing of gas detection and environmental monitoring systems.
Founded in 1986 as a family-run enterprise, Pollution Monitors has established itself as the premier provider of Hydrogen Sulphide and odour monitoring systems for Waste Water and Sewage Treatment Plants. Over the last decade, the company has successfully expanded into other critical sectors, becoming the preferred gas detection partner for laboratories associated with major universities and research establishments.
“We are delighted to welcome Pollution Monitors to the Vesta family,” said Richard Clancy, Group CEO of Vesta Software Group. “Their long-standing reputation as a leader in environmental monitoring and gas detection, particularly within the water and academic sectors, makes them an excellent addition to our portfolio. We look forward to supporting the team as they continue to deliver critical solutions to their diverse client base and preserving the legacy they have built.”
“The buy and hold for life business principles adopted along with their shared vision for strong customer service were key factors in the shareholders’ decision to partner with Vesta. With the trading activities, staff and company name unchanged, the strong foundations created over the past 40 years, coupled with Vesta’s portfolio of companies, will enable us to go from strength to strength”, stated Peter Holbrow, former owner of Pollution Monitors.
Harsha Ramanan, Portfolio Director at Vesta Software Group, welcomed the acquisition, stating: “Pollution Monitors is a trusted partner to world-class educational institutions, alongside their leading position in the waste water sector. We are excited to work with Peter Holbrow & his strong team to support their continued growth and success.”
About Pollution Monitors Ltd
Pollution Monitors Ltd is a specialist in environmental monitoring solutions. Originally focused on Hydrogen Sulphide and odour monitoring for the waste water industry, the company has diversified to become a key supplier of gas detection systems for the academic and research sectors, serving clients such as Imperial College London, UCL, University of Oxford, University of Cambridge and King’s College London. Additionally, the company supplies systems for pharmaceutical plants, semiconductor plants, underground car parks, boiler rooms, and the MOD.
About Vesta Software Group Ltd
Vesta Software Group Ltd. acquires, manages, and builds software companies. Our companies provide mission-critical enterprise and industry-specific software solutions. Vesta Software Group is a division of Constellation Software Inc. (CSI), the world’s largest investor and operator of vertical market software companies. CSI has a market capitalisation of around CA$56 billion, revenues of over US$10 billion, operating in 100+ countries and serving thousands of customers.
