# CSignum

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/csignum

- Industry: Telecoms
- Headquarters: Bathgate, UK
- Website: www.csignum.com
- Total disclosed funding: $12M
- Latest round: Series A (Sep 15, 2026)
- Investors on record: 7

## About

Founded in 2020 in UK, CSignum Ltd. focuses on advanced wireless communication technologies. As of October 2026, Jonathan Reeves is the CEO of the company. In September 2026, CSignum Ltd. raised GBP 2.6 million in series A extension funding from Archangels Investors Limited, PXN Group, Scottish Enterprise, and British Business Bank. This round was a larger part of GBP 9.04 million series A funding.

CSignum specializes in advanced wireless communication technologies, primarily through its proprietary EM-2 platform, which utilizes low frequency electromagnetic fields for data transmission. This innovative solution enables seamless communication across various environments, including underwater and underground applications, transmitting data from the seabed to the shore, from ship hulls to decks, and through rock and soil. The technology effectively addresses limitations of acoustic systems, enhancing data transfer reliability. CSignum caters to diverse sectors such as environmental monitoring, aquaculture, hydropower, and defense, targeting clients involved in critical infrastructure and Internet of Underwater Things (IoUT) applications globally, including North America, Europe, and parts of Asia.

CSignum operates a B2B business model, structuring its revenue streams through partnerships and direct sales of its EM-2 solutions and related services. The company engages clients across multiple industries, offering tailored solutions for underwater data collection and monitoring. Revenue is generated through the sale of these flagship products, with clients typically entering into service agreements that include ongoing support and maintenance. This transaction structure allows for both one-time purchases and subscription-based services, facilitating long-term relationships with clients who require consistent updates and enhancements, with specific pricing plans defined in negotiated contracts.

The company plans to use the September 2026 funding to expand commercially, increase manufacturing capacity, and deploy its EM2 wireless communication products.

## Funding rounds

- Series A, Sep 15, 2026, $3.5M — Archangels Investors Limited, PXN Group, Scottish Enterprise, British Business Bank
- Series A, Apr 15, 2025, $8.4M — Archangels Investors Limited, PXN Group, British Business Bank, Raptor Capital Management, Scottish Enterprise, SeaAhead, Deep Future

## Investors

- Archangels Investors Limited — Series A
- PXN Group (https://capitalatlas.ai/funds/pxn-group) — Series A
- British Business Bank (https://capitalatlas.ai/funds/british-business-bank) — Series A
- Raptor Capital Management (https://capitalatlas.ai/funds/raptor-capital-management) — Series A
- Scottish Enterprise (https://capitalatlas.ai/funds/scottish-enterprise) — Series A
- SeaAhead (https://capitalatlas.ai/funds/seaahead) — Series A
- Deep Future (https://capitalatlas.ai/funds/deep-future) — Series A