Realta Fusion has announced a $9.5 million growth capital facility provided by Silicon Valley Bank (SVB). This debt financing marks the company's latest funding round as it continues to advance its compact, scalable fusion technology.
The growth capital facility follows Realta Fusion's Series A round of $36 million announced in May 2025, which was led by WARF Ventures and Khosla Ventures. To date, the company has raised over $54 million in total funding across its investment and nondilutive financing rounds.
Realta Fusion is developing linear magnetic mirror machines that utilize high-temperature superconducting (HTS) magnets. The company spun out from research at the University of Wisconsin-Madison and is focused on serving industrial heat and power markets.
The company's fusion experiment, WHAM (Wisconsin HTS Axisymmetric Mirror), is located at the University of Wisconsin-Madison, and is jointly operated and funded by both organizations. WHAM utilizes high-temperature superconductor coils in a magnetic mirror configuration and generates a magnetic field of 17 tesla. This is the highest magnetic field of any steady-state fusion energy experiment to date.
Beyond its core research, Realta Fusion has also received substantial nondilutive funding from the U.S. Department of Energy's Fusion Energy Sciences program through the INFUSE initiative, supporting research in advanced spectroscopy, magnetohydrodynamic forces, neutral beam injection, and diagnostic capabilities.
The continued funding reflects investor confidence in Realta Fusion's approach and progress toward commercialization.
