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 Aug 31, 2026, the latest employee count at TerraPower is 1078.

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 93 active competitors, of which 32 are funded. It stands 2nd in terms of total funding among its competitors. The most recent competitor to raise funding was Valar Atomics, which secured $1B in Aug, 2026.

Who are the top competitors of TerraPower?

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

TerraPower - 2026 Company Profile, Team, Funding & Competitors

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 93 active competitors

Employee Count

1,078 as on Aug 31, 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
Terra Energy s.r.o. CIN: 24259012 , Czech Republic, Active	Aug 15, 2012	-	-
TERA Power s.r.o. CIN: 08118043 , Czech Republic, Active	Apr 25, 2019	-	-
TARA Energy s.r.o. CIN: 04677421 , Czech Republic, Active	Dec 29, 2015	-	-
TERRAONE s.r.o. CIN: 04465954 , Czech Republic, Active	Oct 08, 2015	-	-
Terrapower, Llc CIN: 32085990482 , United States, Active		-	-	-
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	8544360	Series D	1582276	4157238	5539811	9379062
Nov 03, 2022	7125774	Series C	6267447	1669010	6856218	SK & 1 more
Aug 15, 2022	2668282	Series C	5287165	6986461	SK	7347299

Access funding benchmarks and valuations. Sign up today!

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 1,078 employees as of Aug 26. Here is TerraPower's employee count trend over the years:

Uncover TerraPower's growth story! Sign up today!

Access Tracxn on any website

Our Google Chrome extension lets you view company details while browsing their websites

Install Tracxn Extension

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	67/100
2nd	TerraPower 2006, Bellevue (United States), Series D	Designer of nuclear reactors	$1.52B	ArcelorMittal, NVentures & 9 others	60/100
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 & 25 others	63/100
5th	Radiant Nuclear 2019, Los Angeles (United States), Series D	Provider of portable nuclear microreactor solutions	$518M	Union Square Ventures, DCVC & 27 others	60/100
6th	Terrestrial Energy 2013, Charlotte (United States), Series D	Developer of modular molten salt reactors for industrial heat generation	$118M	ARPA-E, Varana Capital & 3 others	59/100
7th	Westinghouse Electric 1886, United States, Acquired	Provider of advanced nuclear reactor technology and specialized energy services	-	ARPA-E, Apollo Investment Corporation & 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	Valar Atomics 2023, El Segundo (United States), Series B	Manufacturer of nuclear fission reactors	$1.49B	Riot, Sequoia Capital & 21 others	53/100