When was Terrestrial Energy founded?

Terrestrial Energy was founded in 2013 and raised its 1st funding round 1 year after it was founded.

Where is Terrestrial Energy located?

Terrestrial Energy is headquartered in Charlotte, United States. It is registered at D5 Culham Science Centre, Abingdon, Oxfordshire, United Kingdom, OX14 3DB.

Who is the current CEO of Terrestrial Energy?

Simon Irish of Terrestrial Energy.

Which legal entities is Terrestrial Energy associated with?

Terrestrial Energy is associated with Terrestrial Energy Limited.

How many employees does Terrestrial Energy have?

As of Jun 30, 2026, the latest employee count at Terrestrial Energy is 99.

Is Terrestrial Energy a funded company?

Terrestrial Energy is a funded company, having raised a total of $118M across 20 funding rounds to date. The company's 1st funding round was a $***** Seed round, raised on Mar 31, 2014.

When was the latest funding round of Terrestrial Energy?

Terrestrial Energy's latest funding was a $***** Series D round on Mar 19, 2026, with participation from 0 investor.

Where does Terrestrial Energy rank among its competitors?

Terrestrial Energy ranks 6th amongst 80 active competitors, of which 28 are funded. It stands 6th in terms of total funding among its competitors. The most recent competitor to raise funding was Terrestrial Energy, which secured $85.3K in Mar, 2026.

Who are the top competitors of Terrestrial Energy?

Terrestrial Energy's top competitors include Newcleo, TerraPower and NuScale Power. Among them, Terrestrial Energy secured the most recent funding round in March, 2026.

Terrestrial Energy - 2026 Company Profile, Team, Funding, Competitors & Financials

Company Details

Developer of modular molten salt reactors for industrial heat generation. This technology utilizes liquid fuel to provide high temperature thermal energy for industrial processes and electricity production. By replacing pressurized water systems with molten salt cooling, the design achieves higher thermal efficiency and operational safety. The modular architecture facilitates rapid construction and deployment to replace fossil fuel combustion in heavy industry. These systems produce carbon-free heat and power without emitting pollutants. The approach leverages established fission research to provide a scalable alternative for global energy needs.

Website: terrestrialenergy.com
Social
Email ID: *****@terrestrialenergy.com
Phone Number: +1 **********
Registered Address: D5 Culham Science Centre, Abingdon, Oxfordshire, United Kingdom, OX14 3DB

Key Metrics

Founded Year

2013

Location

Charlotte, United States

Stage

Series D

Total Funding

$118M in 20 rounds

Latest Funding Round

Series D, Mar 19, 2026, $*****

Investors

Sustainable Development Technology Canada & 4 more

Ranked

6^th among 80 active competitors

Employee Count

99 as on Jun 30, 2026

Similar Companies

Valar Atomics & 27 more

View Terrestrial Energy's full profile

Terrestrial Energy is associated with 1 legal entity given below:

Legal Entity Name	Date of Incorporation	Revenue	Latest Employee Count	Documents
Terrestrial Energy Limited CIN: 10127503 , Germany, Active		-	-

Terrestrial Energy has raised a total funding of $118M over 20 rounds. Its first funding round was on Mar 31, 2014. Terrestrial Energy has 5 institutional investors.

Here is the list of recent funding rounds of Terrestrial Energy:

Filter this list

Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Mar 19, 2026	5374418	Series D	9732128	1007518	3127731	4177737
Jul 31, 2025	6723797	Grant (prize money)	1156260	9285532	3423148	OSTI
Jul 01, 2025	4359576	Series D	5724371	6335864	7093897	4402800

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View details of Terrestrial Energy's funding rounds and investors

The founders of Terrestrial Energy is Chris Popoff. Simon Irish is the CEO of Terrestrial Energy.

Here are the details of Terrestrial Energy's key team members:

Chris Popoff: Former Co-Founder of Terrestrial Energy.
Contact Info: 1 email address
Simon Irish: CEO of Terrestrial Energy. They serve on the board of 1 company.
Contact Info: 1 email address

Terrestrial Energy's Board of Directors

Terrestrial Energy's board has 1 active member. Simon Irish is part of team.

Here is the list of Terrestrial Energy's board of directors:

Name	Type	Representing	Status	Duration
ewcjxuc	Team	-	Current	4y 5m

View details of Terrestrial Energy's Founder profiles and Board Members

Terrestrial Energy's employee count trend

Terrestrial Energy has 99 employees as of Jun 26. Here is Terrestrial Energy's employee count trend over the years:

Employee count trend for Terrestrial Energy

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Top competitors of Terrestrial Energy include Newcleo, TerraPower and NuScale Power. Here is the list of Top 10 competitors of Terrestrial Energy, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	Newcleo 2021, Paris (France), Series B	Provider of advanced nuclear energy technologies, focused on designing, building, and operating small modular lead-cooled fast reactors	$843M	Exor, Club degli Investitori & 73 others	70/100
2nd	TerraPower 2006, Bellevue (United States), Series D	Designer of nuclear reactors	$1.52B	ArcelorMittal, SK & 9 others	66/100
3rd	NuScale Power 2007, Portland (United States), Acquired	Developer of micro nuclear power plants	$198M	Doosan Enerbility, IBK Securities & 7 others	63/100
4th	X Energy 2010, Greenbelt (United States), Public	Developer of small modular & high temperature gas cooled nuclear reactor	$1.53B	Jane Street, C5 Capital & 23 others	63/100
5th	Radiant Nuclear 2019, Los Angeles (United States), Series D	Developer of portable nuclear microreactors designed to replace diesel generators	$518M	Andreessen Horowitz, Draper & 27 others	60/100
6th	Terrestrial Energy 2013, Charlotte (United States), Series D	Developer of modular molten salt reactors for industrial heat generation	$118M	Sustainable Development Technology Canada, ARPA-E ... & 3 others	59/100
7th	Westinghouse Electric 1886, United States, Acquired	Developer of small modular reactor	-	Defense.gov, ARPA-E & 6 others	58/100
8th	USNC 2011, Seattle (United States), Series B	Manufacturer of micro modular reactors	$47.4M	Hyundai Engineering & Construction, OSTI & 1 others	54/100
9th	Jimmy 2021, Levallois Perret (France), Series A	Operator of thermal generators providing decarbonized heat to industrial clients	$17.3M	Eren Groupe, Otium Capital & 4 others	54/100
10th	Blykalla 2013, Stockholm (Sweden), Series C	Developer and producer of advanced small modular reactors	$73M	Norrsken Foundation, Oklo & 14 others	53/100