The investment will accelerate growth of its EM-2 family of products which are transforming the way critical wireless sensor data is transmitted from submerged environments to networks above.

The funding round was led by Archangels, Par Equity, and Scottish Enterprise with additional investment from British Business Investment (BBI), Raptor Group, Deep Future, SeaAhead’s Blue Angel Network, and notable individual US investors.

This new investment enables CSignum to expand its global presence, accelerate product development and address the growing demand for reliable, real-time data transmission for underwater and underground applications.

CSignum’s EM-2 solutions represent a breakthrough in wireless communication technology, capable of reliably transmitting data, via patented electromagnetic field signalling (EMFS), through environments including water, ice, soil, rock and concrete to networks above the surface - an ability no other wireless method has successfully achieved to date. Key applications for EM-2 systems include water quality and environmental monitoring, wireless under-ship monitoring, and security applications for critical underwater infrastructure such as offshore wind turbines and oil and gas platforms.

The company also offers CSignum Cloud, providing data services to complement its wireless systems. The company’s dashboard and analytics are successfully deployed on several river water quality monitoring projects.

CSignum is working with customers in the UK, EU and US markets, to address growing environmental regulatory requirements. With upcoming deadlines for compliance, including large-scale real-time monitoring mandates under the AMP8 initiatives, the demand for innovative, wireless solutions presents a significant growth opportunity for CSignum and its EM-2 technology.

Jonathan Reeves CEO at CSignum said: “This investment reflects the growing recognition of the critical need for innovative communication solutions in the underwater IoT sector.

“The support from our investors will allow us to scale our operations, enhance our product offerings and help industries worldwide manage their resources more effectively. We are grateful for their trust and excited to shape the future of underwater communication.”

Dan McKiddie, investment manager at Archangels, said: “CSignum has developed a truly unique technological breakthrough which could be a game-changer for those industries reliant on securing reliable data from their underwater operations. We’re looking forward to supporting the management team in their efforts to scale the business and disrupt the global market for underwater communication.”

Claire Clamm, investment manager at Par Equity, said: “CSignum’s ability to deliver reliable and cost-effective communication solutions for challenging environments sets them apart in the market.

“This funding will accelerate their journey to becoming a global leader in underwater data transmission. We are excited to partner with them as they expand their reach and capabilities.”

Founded in 2020, CSignum is led by CEO Jonathan Reeves and plans to add additional staff in the UK, USA, and EU over the next year as it continues to scale its operations.

The underwater communications market is expected to double in size from $5.1 billion (c. £3.8bn) in 2024 to $10.2bn (c. £7.6bn) by 2032.

The funding will be directed toward expanding the company’s engineering team, advancing its product portfolio and strengthening its market presence to meet the increasing demands for efficient, real-time monitoring solutions.