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CSignum

West Lothian · 7 known investors

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CSignum develops electromagnetic field-based communication and sensing solutions for underwater, underground, and IoT applications. The company serves industries including oil and gas exploration, manufacturing, medical, and solar sectors.

Deep TechEnergyIoT

Founders & leadership

Board

JC
Jarett CarsonBoard director
RS
Rabindra SoniBoard director
RM
Richard Michael Edward HopkinsBoard director
EL
Ewan Lindsey MclellanBoard director
JR
Jonathan ReevesBoard director

Investors · 7

Archangelslisted by ArchangelsEdinburgh

How we know: tech.eu · open dataset · 5k.vc investor directory · Not right? Tell us

Deep Futurelisted by Deep FutureSeattlevia Pablos Holman · inferred

How we know: Deep Future's portfolio page · tech.eu · the VCSheet dataset · open dataset · 5k.vc investor directory · Not right? Tell us

Raptor Grouplisted by Raptor GroupMiami Beachvia James J. Pallotta · inferred

How we know: tech.eu · Not right? Tell us

Scottish EnterprisereportedGlasgow

How we know: tech.eu · Not right? Tell us

Also in the syndicate · 2

British Business Investment (BBI)SeaAhead’s Blue Angel Network

Funding

SEC filings, press & company announcements

$760.5K disclosed across 1 of 4 rounds · 2024–2026

▶$760.5KraisedSep 2026 · 17 investors · Other Technology
Rule 506(b)
Officers, directors & promoters on the filing
  • Jarett CarsonDirector
  • Richard Michael Edward HopkinsDirector
  • Ewan Lindsey MclellanDirector
  • Jonathan ReevesDirector
  • Rabindra SoniDirector
Offering amount
$760.5K
Amount sold
$760.5K
First sale
Aug 2026
Incorporated
Other, United Kingdom
Federal exemptions
06b
Full filing on SEC EDGAR ↗

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.

In the news

Edinburgh-based CSignum raises over €6.9 million to scale underwater wireless communication technology | EU-Startupseu-startups.com · Apr 2025CSignum Raises £6M in Series A Fundingfinsmes.com · Apr 2025CSignum Secures £1 Million of Funding to Transform Underwater and Underground Sensor Networking - CSignumcsignum.com · Mar 2024

Frequently asked questions

What does CSignum do?
CSignum develops electromagnetic field-based communication and sensing solutions for underwater, underground, and IoT applications. The company serves industries including oil and gas exploration, manufacturing, medical, and solar sectors.
Who are CSignum's investors?
CSignum's investors include Bessemer Venture Partners, Archangels, Deep Future, Raptor Group, Scottish Enterprise.
How much funding has CSignum raised?
CSignum has disclosed $760.5K raised across 1 of its 4 known rounds.
Where is CSignum headquartered?
CSignum is headquartered in West Lothian.