Guillaume Mascotto

Guillaume Mascotto

Vice President, Head of ESG and Investment Stewardship


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Guillaume is vice president, head of ESG and Investment Stewardship for American Century Investments®.

Guillaume leads the firm's environmental, social and governance (ESG) investment research and stewardship effort. Using a proprietary analytical framework, his team integrates financially-material ESG factors into a team's investment process and conducts ESG research to augment the financially-driven research created by the firm's investment teams. Guillaume also manages the incorporation of ESG matters in the firm's proxy voting process and drives the development of new ESG-oriented products.

Prior to joining American Century Investments in 2017, Guillaume was a vice president, ESG credit research at Pacific Investment Management Company (PIMCO), where he was responsible for analyzing and integrating ESG risk factors into PIMCO's credit research process. Before joining PIMCO, he was a senior ESG analyst at MSCI. In this role, he conducted impact investment research and risk analysis on global utilities, midstream oil and gas and electrical equipment companies.

Guillaume earned a bachelor's degree and a master's degree in international affairs from the University of Quebec in Montreal. He also holds a master's degree in international business and economics from The Fletcher School at Tufts University.