Helion, a fusion energy startup backed by Sam Altman, has raised $465 million to develop a fusion power plant for Microsoft. The funding round was announced this week and aims to accelerate Helion’s efforts to commercialize fusion energy as a clean power source. Microsoft will be the first customer for the plant, marking a key step in Helion’s growth.
The funding round was led by existing investors and included participation from Microsoft, which is both a strategic partner and customer. Helion plans to use the capital to build its first commercial fusion power plant, leveraging its proprietary technology to generate carbon-free electricity. The company’s CEO highlighted the importance of this milestone in demonstrating fusion’s viability at scale.
Fusion energy has long been pursued as a potential solution to climate change by providing abundant, clean power without the radioactive waste of fission reactors. Helion’s raise is among the largest in the fusion startup sector, which has seen increased investor interest recently. The deal underscores growing corporate commitments to sustainable energy, with Microsoft aiming to power its operations with zero-carbon sources.
Helion’s next step is to construct and operate the fusion plant for Microsoft, expected to deliver megawatts of clean energy. The company disclosed that the project timeline targets initial operation within the next few years, setting a benchmark for fusion commercialization in the energy industry.