Third Sphere

Third Sphere is a New York-based early-stage venture capital firm dedicated to investing in climate technology companies. Founded in 2022, the firm distinguishes itself by focusing on rapid, scalable climate action, aiming to generate both significant environmental impact and strong financial returns. Their investment thesis centers on identifying and supporting innovative solutions across various sectors of climate tech, from energy and carbon solutions to sustainable materials and industrial decarbonization, aligning with their mission to accelerate the transition to a sustainable economy.

The firm primarily targets companies in the pre-seed to Series A stages, providing crucial capital during the foundational phases of a startup's growth. Third Sphere is currently deploying capital from its second fund, Third Sphere Fund II, which closed at $150 million. This follows their successful inaugural fund, Third Sphere Fund I, which raised $75 million in 2022. These fund sizes underscore their commitment and capacity to be a significant player in the climate tech investment landscape, enabling them to back a substantial number of promising ventures.

Third Sphere's typical initial check sizes range from $500,000 to $5 million, indicating their flexibility to support a diverse range of early-stage ventures, from nascent concepts requiring initial seed capital to more developed startups raising Series A rounds. Since its inception, the firm has rapidly built a robust portfolio, comprising over 30 companies. This extensive portfolio reflects their proactive approach to identifying and backing promising climate solutions that align with their dual mandate of impact and returns, fostering groundbreaking technologies and business models.