Propeller

Propeller is a venture capital firm that invests in transformational leaders at the earliest stages of ocean-climate innovation in massive markets. Founded in 2022, Propeller operates with a $118 million Fund I, focusing on Pre-seed to Series A companies that are building climate-tech solutions connected to the ocean. The firm invests across three primary sectors: Industrials (including energy, shipping, transportation, subsea surveying, and inspection), Carbon (focusing on Marine Carbon Dioxide Removal through novel chemical, biological, and physical pathways, plus enabling technologies for sensing, monitoring, and modeling), and Organics (covering mariculture, marine ingredients, food, feed, and fertilizer innovations). Propeller's investment thesis centers on the ocean as a climate superhero, recognizing its role in storing anthropogenic carbon and its potential for scale, permanence, and additionality in climate solutions. The firm provides check sizes ranging from approximately $500K to $2M and can lead or follow investment rounds. Beyond capital, Propeller offers an Ocean MBA program to help early-stage teams sharpen their business models, learn from exited founders and seasoned investors, and accelerate their path to scale. The program takes place at The Engine in Cambridge, MA, and is designed for climate tech entrepreneurs building ocean-connected solutions. Propeller's portfolio includes companies working on robotics, automation, digitalization, and decarbonization technologies that create efficiencies in legacy and emerging industries subject to ocean-climate dynamics.