The 2025 ARPA-E Energy Innovation Summit showcased a diverse range of energy solutions, from laser-based steel production to geologic hydrogen research. Limelight Steel presented a forward-thinking approach using lasers to create steel from iron ore, significantly cutting greenhouse gas emissions in the process. MIT researchers demonstrated how rocks could potentially be used to produce fuels like hydrogen, with spinout company Addis Energy commercializing the innovative research. Niron Magnetics attracted attention with their iron nitride magnets, offering a sustainable alternative to rare earth magnets, as seen in their electric guitar demo. Meanwhile, Natron's sodium-ion batteries emerged as a cost-effective and eco-friendly choice for data centers, providing stable power supply without relying on scarce materials. The event highlighted a positive outlook on the future of energy innovation and sustainability.