Fathom Fund

Fathom Fund is a venture capital firm established in 2023 and located in Houston, Texas. The firm specializes in investing in deep-tech startups, focusing on sectors such as material science, electronics, energy transition, and aerospace. As a Registered Investment Adviser, Fathom Fund is dedicated to identifying and supporting innovative companies that are poised to advance technology and drive significant industry change.

Eric Bielke

Co-Founder and Managing Partner

3 past transactions

Resource Chemical

Venture Round in 2025
ReSource Chemical is a company based in Berkeley, California, focused on developing high-performance plastics derived from carbon dioxide. The company utilizes a proprietary bio-based platform to create chemicals that enable the production of environmentally friendly plastics with superior physical properties compared to traditional fossil fuel-based plastics. By converting CO2 into these innovative materials, ReSource Chemical aims to provide sustainable alternatives that do not contribute to environmental pollution.

ElectraLith

Series A in 2025
ElectraLith specializes in the development of direct lithium extraction and refining technology aimed at enhancing the efficiency and sustainability of lithium production. The company's innovative approach utilizes electricity to extract and refine lithium, which allows for cost reductions for both brine and hard rock producers. This technology enables clients to achieve more economical lithium production from various feedstocks worldwide, thereby supporting the growing demand for lithium in energy storage and electric vehicle applications.

Xscape Photonics

Series A in 2024
Xscape Photonics specializes in the development of photonic chips aimed at enhancing bandwidth connections within high-performance computing systems and data centers. By leveraging photonics technology, the company focuses on creating scalable, high-bandwidth solutions that are both energy-efficient and cost-effective. These chips facilitate improved connectivity among computing elements, significantly reducing power consumption while increasing the speed and efficiency of communications. Xscape Photonics' innovations support the advancement of applications in artificial intelligence, machine learning, and simulation hardware, positioning the company as a key player in the evolution of next-generation computing infrastructure.
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