Nat Bullard's Halcyon nets $10.8M for energy data service by Halcyon Oct 27, 2025 6:33:30 PM Share: facebook-f icon linkedin-in icon X Twitter icon envelope icon Axios · April 18, 2024 · Alan Neuhauser Halcyon, a startup co-founded by longtime energy expert Nat Bullard, raised a $10.8 million seed round for an AI-powered search service, the startup tells Axios.
Fresh intel from state utility regulatory filings By Halcyon Oct 29, 2025 7:42:42 PM Latitude Media · July 3, 2025 · Shayle Kann Read more
Meet the companies using AI to reinvent the energy business By Halcyon Oct 27, 2025 6:25:01 PM Fortune · July 23, 2025 · Alexandra Sternlicht Read more