CSignum secures £2.6m to accelerate underwater and through-ground monitoring of critical infrastructure
West Lothian-based CSignum, a leading provider of wireless communications from beneath the surface of water, ice and ground, has completed a £2.6m funding round to accelerate commercial deployment of its EM2 product portfolio across multiple markets and applications, including water-quality monitoring.
The investment supports CSignum’s mission to become an enabler of AI in the physical world, extending reliable data communications to underwater and below-ground environments.
Archangels, PXN Ventures, Scottish Enterprise, British Business Bank and a group of US-based angel investors have provided additional investment, reflecting their continued confidence in CSignum's technology and momentum in multiple markets.
Funding will be used to support commercial expansion and manufacturing scale-up. Since completing a £6m investment with the existing investor group in April 2025, CSignum has moved from pilot projects into volume deployments with multiple UK water utilities and international customers.
Growth in sales has been underpinned by the UK Section 82 (AMP8) Act requiring continuous water-quality measurements at combined storm overflows (CSOs) and at sewage-discharge points. CSignum now has deployments with several UK water-utility companies.
The company is exploring other strategic opportunities for its wireless-through-water and through-ground comms technology, and is enabling new sensing capabilities in a ‘smart buoy’ project in the Gulf of Mexico. The company has also completed successful pilots with two major US water-quality monitoring organisations and is supporting through-ground sensing for a large-scale, critical infrastructure project in Asia.
It has announced the appointment of John Nicholls as chief executive, succeeding Jonathan Reeves, who will transition to the role of chief strategy officer. John brings broad experience as both chief executive and chief commercial officer in international sales growth, fundraising, M&A and strategic partnerships across a wide range of market sectors including photonics, quantum technologies, space, semiconductors and EV infrastructure.
John said: "I’m excited to be joining CSignum at this pivotal moment in its journey. The team has built a differentiated technology and strong customer relationships across diverse market sectors, and my focus now is turning that potential into large-scale deployments.
“More broadly, CSignum exists to close the communications gap between inaccessible parts of the physical world and the digital and AI systems that increasingly depend on them. This investment lets us do exactly that, faster."
Pictured: John Nicholls
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