Global nuclear energy investment has already doubled 2019 levels, with capital flowing into reactors, fuel, enrichment, and next-generation startups at a pace few analysts had anticipated. According to the latest data from the International Atomic Energy Agency (IAEA), annual spending reached approximately $75 billion in 2024, up from an average of $50 billion recorded between 2017 and 2023. The IEA puts the figure even higher: investment has surpassed $80 billion, with nearly 80 gigawatts of new capacity currently under construction.
The growth extends well beyond large construction sites. Venture capital investment in next-generation nuclear fission startups hit $3.5 billion in 2025, more than double the previous record set in 2022, according to PitchBook data. Two recent moves capture the mood of the sector: Newcleo raised nearly $250 million through a Nasdaq listing, while Westinghouse is approaching an IPO valued at over $50 billion. These are concrete signals, not mere aspirations.
Three distinct forces are driving this momentum. The first is data center demand for clean, reliable baseload power — small modular reactors, or SMRs, are natural candidates to meet it. The second is the pressure of climate targets: nearly 40 countries have signed a pledge to triple global nuclear capacity by 2050. The third is energy security, a factor that has brought nuclear back to the top of government agendas after years on the sidelines. The IEA estimates that in 2024 alone, final investment decisions were taken on more than 8 gigawatts of new nuclear capacity.
China leads the rankings in absolute terms, with $17.7 billion invested in 2024. The country operates 55 reactors and has 23 more under construction — the most aggressive expansion program in the world. But geographic interest is broadening: Africa, largely absent from the nuclear landscape until recently, is advancing new projects. The Philippines is seeking nuclear energy partnerships with Singapore. Australia is debating the repeal of its legislative ban on civil nuclear power. Kenya is actively working toward its first plant. The map of nuclear energy is being redrawn.
To triple global capacity from the current 403 gigawatts to 1,446 gigawatts by 2050, the World Nuclear Association estimates a total requirement of $6 trillion — roughly $250 billion per year in investment. That is a large number. But the data already shows a trajectory consistent with that target: an agreement between the World Bank and the IAEA signed in June 2025 opened the door to new blended finance and risk-sharing mechanisms. According to the International Monetary Fund, nuclear investment multipliers are six times higher than those of fossil fuels and three times those of renewables in the near term. Capital follows returns.
