Union Square Ventures

Founded in 2003, Union Square Ventures is a venture capital firm based in New York. It specializes in early to late-stage investments in internet-focused companies, with a focus on web services creating large networks and innovative use of information technology across industries like media, marketing, fintech, climate tech, and healthcare.

Mona Alsubaei

Analyst

Hanel Baveja

Analyst

Brad Burnham

Partner

John Buttrick

Partner

Grace Carney

Analyst

Nick Grossman

General Partner

Rebecca Kaden

General Partner

Matt Mandel

Analyst

Hannah Murdoch

Analyst

Nikhil Raman

Analyst

Andy Weissman

Partner

Fred Wilson

Partner

Past deals in Nuclear Energy

Radiant

Series C in 2024
Radiant is a clean energy startup based in Los Angeles, California, that specializes in the development of portable nuclear microreactors. Founded in 2019, the company aims to provide an alternative to fossil fuels for both military and commercial applications. Its flagship product, the Kaleidos microreactor, is designed to fit within a shipping container, allowing for transportation by air, ship, and road. This innovative microreactor serves as a zero-emissions power source, making it particularly suitable for remote locations and critical applications where traditional diesel generators are typically used.

Transmutex

Series A in 2024
Transmutex is a Swiss company founded in 2019 that specializes in innovative nuclear technology aimed at significantly reducing existing nuclear waste. The company leverages advanced techniques, including particle accelerators, to transmute long-lived nuclear waste into less harmful materials while simultaneously generating carbon-free energy. This energy can be reintegrated into the power grid or utilized for green hydrogen production. Comprising a diverse team of physicists, computer scientists, and environmentalists, Transmutex is pioneering a new approach to nuclear energy that offers scalable, carbon-free solutions without the typical challenges associated with conventional nuclear power plants.

Radiant

Series A in 2022
Radiant is a clean energy startup based in Los Angeles, California, that specializes in the development of portable nuclear microreactors. Founded in 2019, the company aims to provide an alternative to fossil fuels for both military and commercial applications. Its flagship product, the Kaleidos microreactor, is designed to fit within a shipping container, allowing for transportation by air, ship, and road. This innovative microreactor serves as a zero-emissions power source, making it particularly suitable for remote locations and critical applications where traditional diesel generators are typically used.

Transmutex

Series A in 2021
Transmutex is a Swiss company founded in 2019 that specializes in innovative nuclear technology aimed at significantly reducing existing nuclear waste. The company leverages advanced techniques, including particle accelerators, to transmute long-lived nuclear waste into less harmful materials while simultaneously generating carbon-free energy. This energy can be reintegrated into the power grid or utilized for green hydrogen production. Comprising a diverse team of physicists, computer scientists, and environmentalists, Transmutex is pioneering a new approach to nuclear energy that offers scalable, carbon-free solutions without the typical challenges associated with conventional nuclear power plants.
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