# Fusion Power Startup Helion Valued at $15.5B in $465M Funding Round

> **Platform:** [SPIDITS AI](https://spidits.com/) — Real-Time AI News & Market Intelligence  
> **Published:** 2026-06-05T12:00:00.000Z  
> **Category:** FUNDING  
> **Impact Score:** 180/100  
> **Primary Source:** [SiliconANGLE](https://siliconangle.com/2026/06/05/fusion-power-startup-helion-valued-15-5b-465m-funding-round)  
> **Canonical Citation:** [https://spidits.com/timeline/fusion-power-startup-helion-valued-at-15-5b-in-465m-funding-round](https://spidits.com/timeline/fusion-power-startup-helion-valued-at-15-5b-in-465m-funding-round)

## Executive Summary
Fusion power startup Helion Energy Inc. has closed a $465 million funding round led by Thrive Capital. The Series G deal also included contributions from SoftBank Vision Fund 2, Lightspeed and more than a half-dozen others.

## Referenced Coverage & Sources
- **[TechCrunch Startups](https://techcrunch.com/2026/06/04/helion-the-sam-altman-backed-fusion-startup-raises-465m-to-build-a-power-plant-for-microsoft)**: Helion, the Sam Altman-backed fusion startup, raises $465M to build a power plant for Microsoft — _Fusion startup Helion is racing to complete a power plant for Microsoft by 2028. A fresh infusion of cash should help with that._
- **[SiliconANGLE](https://siliconangle.com/2026/06/05/fusion-power-startup-helion-valued-15-5b-465m-funding-round)**: Fusion power startup Helion valued at $15.5B in $465M funding round — _Fusion power startup Helion Energy Inc. has closed a $465 million funding round led by Thrive Capital. The Series G deal also included contributions from SoftBank Vision Fund 2, Lightspeed and more than a half-dozen others. Helion stated in its Thursday funding announcement that it's now valued..._

---
*Synthesized by SPIDITS AI Market Intelligence Desk. Track live AI news, model releases, and funding: [https://spidits.com](https://spidits.com)*