Stephen Petranek

Operating Partner
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Ocean Zero LLC

As the Operating Partner of Ocean Zero LLC, Petranek invests in young innovative companies that can make a breakthrough difference in decarbonizing shipping, ferries, fishing, and recreational boating on the world’s oceans, rivers, and lakes.


He also serves as Investment Advisor to a sister fund, Virya LLC, which supports ventures that have high initial impact and scalability to eliminate global greenhouse gas emissions and sequester CO2.

As a lifelong journalist with expertise in science and finance, Petranek has been the editor of The Washington Post Magazine, science editor at Life Magazine, and editor-in-chief of Discover Magazine, as well as editor-in-chief of the financial newsletter Breakthrough Technology Alert. He is a board member of five companies: one in Sweden, one in France, one in Germany, one in Canada, and one in the United States.

Stephen Petranek