Transforming Transmission
Viridon is an independent transmission utility. We deliver high-voltage infrastructure to meet America’s growing need for affordable, reliable, clean energy.
$ B
in partnership-enabled projects since 2025What sets us apart
Experience
Our team deploys their decades of experience in developing and operating large-scale transmission projects across North America.
Partnership
We are collaborative to our core, working with utilities, regulators, and stakeholders to deliver for customers.
Agility
We are utility grade yet nimble, marked by hands-on leadership, flexibility, innovation, and speed.
Integrity
We say what we do and we do what we say, honoring commitments and staying accountable throughout the project lifecycle.
Projects
Humboldt
Location: California (CAISO)
Details: Combined 416 miles of single-circuit 500 kV transmission line and the New Humboldt 500/115kV substation.
Background: CalGrid, a Viridon subsidiary, was selected by CAISO in 2025 to finance, construct, own, operate, and maintain two transmission projects in Northern California: New Humboldt–Collinsville and New Humboldt–Fern Road. Currently under development and planned for completion in 2034, the Humboldt projects will enhance the state’s high-voltage transmission backbone, improving regional reliability while facilitating the integration of renewable energy.
Path 15
Location : California (CAISO)
Details: 84-mile, single-circuit 500 kV transmission line.
Background: Viridon acquired the Path 15 Project, which links Northern and Southern California and is a vital component of the state’s energy infrastructure. It was developed through a unique public-private partnership with the Western Area Power Administration, which owns and maintains the line.
Wisconsin Southeast
Location: Wisconsin (MISO)
Details: 106 miles of 345 kV lines and four 345 kV substations.
Background: Viridon Midcontinent, a Viridon subsidiary, was selected by MISO in 2026 to develop the Wisconsin Southeast Competitive Transmission (WISE) project. The WISE project is designed to strengthen reliability and address long-term system needs in southeastern Wisconsin.
Where we operate
Built to scale nationally
Viridon is qualified to develop new transmission projects nationwide. Our team has deep experience across all regional power systems, applying market-specific insight while maintaining a consistent, repeatable approach to project delivery.
Partners
Partnered with industry leaders
News & Insights
Viridon is proudly sponsored by funds affiliated with Blackstone Inc. (NYSE: BX), one of the world’s leading alternative asset managers. Blackstone’s long-term capital and infrastructure experience supports our ability to develop, finance, own and operate even the largest and most complex transmission assets.
