When was GSE Systems founded?

GSE Systems was founded in 1971 and raised its 1st funding round 36 years after it was founded.

Where is GSE Systems located?

GSE Systems is headquartered in Baltimore, United States. It is registered at Columbia, Maryland.

How many employees does GSE Systems have?

As of Jul 31, 2026, the latest employee count at GSE Systems is 413.

Is GSE Systems a funded company?

GSE Systems is a funded company, having raised an undisclosed amount across 4 funding rounds to date. The company's 1st funding round was a $***** Post IPO round, raised on Jun 18, 2007.

When was the latest funding round of GSE Systems?

GSE Systems' latest funding was a $***** Conventional Debt round on May 11, 2018, with participation from 1 investor. Its primary sector is Nuclear Energy. In United States, the Nuclear Energy sector has seen $4.5B in funding in 2026 to date.

What is the annual revenue of GSE Systems?

Annual revenue of GSE Systems is between $10M and $50M as on Dec 31, 2023

Where does GSE Systems rank among its competitors?

GSE Systems ranks 7th amongst 343 active competitors, of which 22 are funded. It stands 8th in terms of total funding among its competitors. The most recent competitor to raise funding was Realta Fusion, which secured an undisclosed amount in Sep, 2026.

Who are the top competitors of GSE Systems?

GSE Systems' top competitors include Aalo Atomics, Fortum and Antares Industries. Among them, Realta Fusion secured the most recent funding round in September, 2026.

GSE Systems - 2026 Company Profile, Funding, Competitors & Financials

Company Details

GSE Systems provides simulation and training tools for nuclear power plants. Products include RELAP5 - HD - a reactor thermohydraulic solution which helps in debugging and real-time calculations, Jade - nuclear power plant simulation suite with fluid dynamics, electrical, logic & control systems, and SimExec - multi-user environment for model developers. Also offers tools for training in classrooms like VPanel and GWPR - generic nuclear simulators for the nuclear industry, VPanel and Envision simulators for the thermal industry, and Envision universal simulator for the petroleum industry.

Website: gses.com
Social
Email ID: *****@gses.com, *****@gses.com
Phone Number: +1 **********
Registered Address: Columbia, Maryland

Key Metrics

Founded Year

1971

Location

Baltimore, United States

Stage

Acquired

Latest Funding Round

Conventional Debt, May 11, 2018, $*****

Investors

NGP Energy Technology Partners & 1 more

Ranked

7^th among 343 active competitors

Annual Revenue

$10M - $50M as on Dec 31, 2023

Employee Count

413 as on Jul 31, 2026

Investment & Acquisitions

Iddeal Concepts & 5 more

Similar Companies

Aalo Atomics & 369 more

Exit Details

Acquired by Pelican Energy Partners (Aug 13, 2024)

View GSE Systems' full profile

GSE Systems is associated with 3 legal entities given below:

Legal Entity Name	Date of Incorporation	Revenue	Latest Employee Count	Reports
GSE SYSTEMS INC CIN: 944480 , United States, Active	Feb 13, 1996	$10M - $50M (As on Dec 31, 2023)	278 (As on Dec 31, 2022)	-
GSE SYSTEMS, INC. CIN: 521868008 , United States, Active	Dec 26, 999	-	192 (As on Dec 31, 2024)	-
GSE CORPORATION CO., LTD. CIN: 0755546000116 , Thailand, Active	Apr 11, 2003	-	-

GSE Systems got acquired by Pelican Energy Partners on Aug 13, 2024.

Click here to take a look at GSE Systems's acquisition in detail

GSE Systems has raised funding over 4 rounds. Its first funding round was on Jun 18, 2007. Its latest funding round was a Conventional Debt round on May 11, 2018 for $*****. 1 investor participated in its latest round. GSE Systems has 2 institutional investors.

Here is the list of recent funding rounds of GSE Systems:

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Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
May 11, 2018	2998187	Conventional Debt	4143070	6705328	5379430	7908810
Jan 04, 2017	1638226	Conventional Debt	4679180	5803625	6879849	Citizens Bank
Apr 20, 2012	7674744	Post IPO	1630879	4103511	9243864	NGP Energy Technology Partners

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GSE Systems' employee count trend

GSE Systems has 413 employees as of Jul 26. Here is GSE Systems's employee count trend over the years:

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Top competitors of GSE Systems include Aalo Atomics, Fortum and Antares Industries. Here is the list of Top 10 competitors of GSE Systems, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	Aalo Atomics 2023, Austin (United States), Series B	Manufacturer of mass produced nuclear reactors for data center power	$133M	Valor Equity Partners, Fifty Years & 23 others	67/100
2nd	Fortum 1998, Espoo (Finland), Public	Provider of clean energy solutions	-	Taaleri, Finnfund & 3 others	66/100
3rd	Antares Industries 2023, Los Angeles (United States), Series C	Provider of micro-sized nuclear reactors for remote off-grid	$479M	Caffeinated Capital, Paradigm & 17 others	64/100
4th	Realta Fusion 2021, Madison (United States), Series A	Developer of compact modular fusion systems for industrial heat applications	$45M	Future Ventures, Khosla Ventures & 9 others	63/100
5th	Framatome 1958, Courbevoie (France), Acquired	Manufacturer of nuclear reactor components and provider of engineering services for power plants	-	EDF, DOE & 3 others	57/100
6th	BHI Energy 1979, Weymouth (United States), Acquired	Developer of renewable energy and oil & gas projects	-	Summit Partners, Berkshire Partners & 3 others	57/100
7th	GSE Systems 1971, Baltimore (United States), Acquired	Simulation tools for nuclear power plants	-	NGP Energy Technology Partners, Citizens Bank	56/100
8th	Studsvik 2013, Nykoping (Sweden), Public	Offers solutions for nuclear energy sector	-	Briban Invest, Peter Gyllenhammar & 1 others	56/100
9th	Blue Energy 2023, Edinburgh (United Kingdom), Series B	Producer of nuclear energy	$425M	At One Ventures, Engine Ventures & 7 others	55/100
10th	Ansaldo Energia 1853, Genoa (Italy), Acquired	Power generation plants	-	CDP Equity, European Investment Bank & 3 others	55/100

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GSE Systems has not made any investments yet. GSE Systems has made 6 acquisitions.

Here is the list of latest three $acquisitions:

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Date of Investment/Acquisition	Type	Company Name	Founded Year	Location
Jan 19, 2026	Acquisition	Iddeal Concepts	2001	Crystal River (United States)
Feb 19, 2019	Acquisition	DP Engineering	1995	Fort Worth (United States)
May 14, 2018	Acquisition	True North Consulting	1999	Montrose (United States)