When was TerraPower founded?

TerraPower was founded in 2006 and raised its 1st funding round 2 years after it was founded.

Where is TerraPower located?

TerraPower is headquartered in Bellevue, United States. It is registered at Bellevue, Washington.

How many employees does TerraPower have?

As of Jun 30, 2026, the latest employee count at TerraPower is 1049.

Is TerraPower a funded company?

TerraPower is a funded company, having raised a total of $1.52B across 8 funding rounds to date. The company's 1st funding round was a $***** Angel round, raised on Jan 31, 2008.

When was the latest funding round of TerraPower?

TerraPower's latest funding was a $***** Series D round on Jun 18, 2025, with participation from 2 investors.

Where does TerraPower rank among its competitors?

TerraPower ranks 2nd amongst 77 active competitors, of which 27 are funded. It stands 2nd 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 TerraPower?

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

TerraPower - 2026 Company Profile, Team, Funding & Competitors

TerraPower is a series D company based in Bellevue (United States), founded in 2006 by Bill Gates. It operates as a Designer of nuclear reactors. TerraPower has raised $1.52B in funding from ArcelorMittal and SK. The company has 77 active competitors, including 27 funded and 5 that have exited. Its top competitors include companies like Newcleo, NuScale Power and X Energy.

Company Details

Designer of nuclear reactors. The portfolio includes IV traveling wave reactor (TWR) that offers a safe and economic form of low-carbon energy that meets baseload demand for electricity. The company is also investigating a molten salt reactor(MSR) as an alternative technology.

Website: www.terrapower.com/
Social
Registered Address: Bellevue, Washington

Key Metrics

Founded Year

2006

Location

Bellevue, United States

Stage

Series D

Total Funding

$1.52B in 8 rounds

Latest Funding Round

Series D, Jun 18, 2025, $*****

Investors

ArcelorMittal & 10 more

Ranked

2^nd among 77 active competitors

Employee Count

1,049 as on Jun 30, 2026

Similar Companies

ARC & 3 more

View TerraPower's full profile

TerraPower is associated with 6 legal entities given below:

Legal Entity Name	Date of Incorporation	Revenue	Latest Employee Count	Documents
TERA Power s.r.o. CIN: 08118043 , Czech Republic, Active	Apr 25, 2019	-	-
Terrapower, Llc CIN: 32085990482 , United States, Active		-	-	-
TARA Energy s.r.o. CIN: 04677421 , Czech Republic, Active	Dec 29, 2015	-	-
Terra Energy s.r.o. CIN: 24259012 , Czech Republic, Active	Aug 15, 2012	-	-
TERRAONE s.r.o. CIN: 04465954 , Czech Republic, Active	Oct 08, 2015	-	-
Terrapower, Llc CIN: 263743526 , United States, Active	Dec 26, 999	-	648 (As on Dec 31, 2024)	-

TerraPower has raised a total funding of $1.52B over 8 rounds. Its first funding round was on Jan 31, 2008. Its latest funding round was a Series D round on Jun 18, 2025 for $*****. 2 investors participated in its latest round. TerraPower has 11 institutional investors.

Here is the list of recent funding rounds of TerraPower:

Filter this list

Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Jun 18, 2025	3268668	Series D	8626167	9387978	7091290	2371889
Nov 03, 2022	3938611	Series C	7752326	7729278	2455480	SK & 1 more
Aug 15, 2022	1933667	Series C	7165583	1056429	SK	6809238

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View details of TerraPower's funding rounds and investors

The founders of TerraPower is Bill Gates.

Here are the details of TerraPower's key team members:

Bill Gates: Founder of TerraPower and founder of 13 other companies, including Microsoft 365 Copilot, Cascade Investment and Breakthrough Energy. They are also an angel investor in 47 startups.

View details of TerraPower's Founder profiles and Board Members

TerraPower's employee count trend

TerraPower has 1,049 employees as of Jun 26. Here is TerraPower's employee count trend over the years:

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Top competitors of TerraPower include Newcleo, NuScale Power and X Energy. Here is the list of Top 10 competitors of TerraPower, 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	CRV, ArcelorMittal & 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 small modular reactor	$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	52/100