Fine Structure Ventures

Fine Structure Venture is a venture capital fund affiliated with FMR LLC, the parent company of Fidelity Investments. The firm specializes in early-stage investments, targeting disruptive innovations in science and technology. By focusing on groundbreaking advancements, Fine Structure Venture aims to support and nurture companies that have the potential to transform their industries.

Shyam Kamadolli

Managing Director

Josué J. L

Senior Associate

Past deals in Electrical Equipment

VEIR

Series B in 2025
VEIR is a company focused on innovative electricity transmission solutions using high-temperature superconductors. It has developed a unique passive evaporative cryogenic cooling technology that significantly enhances cooling efficiency, delivering twenty times the cooling power per kilogram of nitrogen flow compared to traditional mechanical methods. By utilizing commercial superconducting tape, VEIR's technology enables power delivery at transmission levels without resistive losses. This advancement allows clients to streamline permitting processes and supports the economical establishment of electric transmission lines across distribution-scale infrastructure.

VEIR

Series A in 2023
VEIR is a company focused on innovative electricity transmission solutions using high-temperature superconductors. It has developed a unique passive evaporative cryogenic cooling technology that significantly enhances cooling efficiency, delivering twenty times the cooling power per kilogram of nitrogen flow compared to traditional mechanical methods. By utilizing commercial superconducting tape, VEIR's technology enables power delivery at transmission levels without resistive losses. This advancement allows clients to streamline permitting processes and supports the economical establishment of electric transmission lines across distribution-scale infrastructure.

Mainspring

Series E in 2022
Mainspring Energy, Inc. is a technology company based in Menlo Park, California, that specializes in developing linear generator technology for low carbon, dispatchable energy solutions. Founded in 2010 by three Stanford engineers, the company focuses on creating advanced prototypes that convert fuel into electricity through a unique, low-temperature reaction of air and fuel. This innovative approach allows Mainspring to offer generators that provide affordable, reliable electricity while significantly reducing carbon emissions compared to traditional electric grids. The company's mission is to address climate change and enhance energy accessibility, contributing to the development of net-zero carbon energy systems for the future.

Mainspring

Series E in 2022
Mainspring Energy, Inc. is a technology company based in Menlo Park, California, that specializes in developing linear generator technology for low carbon, dispatchable energy solutions. Founded in 2010 by three Stanford engineers, the company focuses on creating advanced prototypes that convert fuel into electricity through a unique, low-temperature reaction of air and fuel. This innovative approach allows Mainspring to offer generators that provide affordable, reliable electricity while significantly reducing carbon emissions compared to traditional electric grids. The company's mission is to address climate change and enhance energy accessibility, contributing to the development of net-zero carbon energy systems for the future.
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