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First Light Fusion

Energy · Yarnton, United Kingdom · Founded 2011

Inspired by the only natural example of inertial confinement on Earth, First Light Fusion is developing a practical pathway to fusion energy using the simplest machine possible MoreLess

First Light Fusion is a groundbreaking startup that operates in the energy sector, specifically focusing on fusion power. Their unique approach, known as projectile fusion, aims to provide a simpler, more energy-efficient solution to fusion power. This technology has been proven through a world-first result, demonstrating fusion with a projectile for the first time.

The company's mission is to create the simplest machine possible to solve the problem of fusion power. They aim to develop a technology that can scale and fit with existing power plant engineering. Their unique target designs, consisting of an amplifier and a fuel capsule, are the key to their technology. The amplifier increases the pressure of the projectile impact and creates convergence, focusing shockwaves onto the fuel capsule.

To test their target designs, First Light Fusion uses two-stage gas guns. However, to achieve higher velocities, they rely on electromagnetic launch, similar to a railgun, achieved with their pulsed power machines. Their research is supported by simulation tools that allow for rapid design optimization, and they place a strong emphasis on verification and validation.

Their power plant concept uses a liquid first wall, with pure natural lithium as the working fluid. This approach can be built with existing nuclear technology and avoids some of the significant engineering challenges of fusion, like neutron damage and producing enough tritium.

In terms of their business model, First Light Fusion is a research and development company. They make money by developing and potentially licensing or selling their technology to larger energy companies or governments interested in cleaner, more efficient power sources.

Keywords: Fusion Power, Energy Efficiency, Projectile Fusion, Power Plant Engineering, Target Design, Electromagnetic Launch, Pulsed Power Machines, Design Optimization, Liquid First Wall, Nuclear Technology.

Company overview

First Light Fusion company information

The essential company record, classifications and operating signals in one place.

Status
Operational
Founded
2011
Headquarters
Yarnton, United Kingdom
Employees
82
Open positions
3
Dealroom signal
70.1
client focusb2btechnologyDeep Techsub industryClean Energybusiness modelManufacturingsectorSpinoutsectorSustainable Development GoalssectorNuclear FusionsectorClimate TechsectorNovel EnergysectorHard TechsectorNIF defense security and resiliencesectorNIF energysectorNIF Energy Security and Climate ChangesectorDT and LS

Valuation & funding

First Light Fusion funding history

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
LATE VCOther financing Apr 2026 $34M $225M IP Group · Hostplus · UK Atomic Energy Authority · East X Ventures
SERIES COther financing Feb 2022 $45M $180M IP Group · Tencent · Hostplus · Bravos Capital
SECONDARYOther financing Jun 2021 $0 Salica Investments
LATE VCOther financing Dec 2020 $25M $100M IP Group · Hostplus · Oxford Science Enterprises
LATE VCOther financing Nov 2017 Oxford Science Enterprises
LATE VCOther financing Sep 2015 IP Group
SERIES BOther financing Oct 2013 Parkwalk Advisors
FundingOther financing Jul 2011 IP Group · Parkwalk Advisors
SPINOUTOther financing Mar 2011 Oxford University Innovation · University of Oxford
Showing 9 recorded eventsUnlock the complete deal history →

Financials

Revenue, earnings and profit over time

Reported history and available estimates. Estimated years are marked “E”; sparse fields are left blank rather than inferred.

YearRevenueGrowthEBITDAMargin
2026 $5K 0% −$19M -413760.1%
2025 $5K 0% −$19M -413760.1%
2024 $5K +2207.1% −$19M -413760.1%
2023 $197 -99.9% −$19M -9545885.8%
2022 $275K +1.5% −$12M -4518.8%
2021 $271K −$12M -4518.7%
Company filings, research estimates and Dealroom dataOpen the full financial model →

Growth signals

First Light Fusion website traffic

Latest recorded traffic for First Light Fusion is 7K monthly website visits, up 4.5% over the last three months. First Light Fusion's team declined 4.7% over the past year.

Latest monthly visits7K 3-month web change+4.5% 1-year team growth-4.7%
Monthly website visits77 observations · Oct 2019–Jul 2026
Hover or focus a point to see its exact monthly valueCompare with peers →

Comparisons

First Light Fusion compared with similar companies

Dealroom’s weighted taxonomy model identifies the closest operating peers. Company identity and context stay open; selected comparison metrics preview what is available in the platform.

Showing 8 of the closest matchesCompare every metric →

Talent graph

First Light Fusion's talent

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Team profiled 12 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 6 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Investors

11 investors on First Light Fusion's cap table

Sourced from Dealroom's funding and investor records. Investor profile links are shown where available.

Series A 1 investor entered at this stage
Parkwalk Advisors
Series B+ 8 investors entered at this stage
IP Group
Oxford Science Enterprises
Hostplus
Salica Investments
Tencent
Bravos Capital
UK Atomic Energy Authority
East X Ventures
Other known 2 additional known investors
Oxford University Innovation
University of Oxford

Global footprint

Where First Light Fusion has talent and traffic

Workforce by country
3 countries with
team presence
🇬🇧 United Kingdom96.4%
🇩🇪 Germany1.8%
🇨🇭 Switzerland1.8%
3 countries shown

In the news

Latest news about First Light Fusion

Recent press, funding announcements, and product moves mentioning First Light Fusion — open to read from the original sources.

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Market sentiment

What the market is saying about First Light Fusion

An AI-synthesized read of the highest-engagement posts about First Light Fusion on X over the past 7 days. We rank by likes & retweets, ignore corporate channels, and surface the themes that broke out from real people.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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