SESAMm, a leading provider of AI-powered ESG and reputational risk data, is pleased to announce that Flexstone Partners, a global private equity investment manager and advisor, has selected SESAMm’s platform to strengthen its pre-investment screening and portfolio monitoring processes.
With approximately €10 billion in assets under management, Flexstone Partners invests globally across all private asset classes, including private equity, mezzanine, and infrastructure, through primary and secondary investments in funds, as well as direct co-investments in buyout & growth capital transactions. As a signatory of the UN-supported Principles for Responsible Investment (UN PRI) and an affiliate of Natixis Investment Managers, the firm integrates ESG considerations across its strategies and throughout the investment lifecycle.
As part of its investment process, Flexstone Partners systematically screens potential and existing holdings for controversies and reputational risks. The firm will now leverage SESAMm’s AI-powered ESG and reputational risk data to identify issues such as human rights violations, corruption, and environmental breaches, even among non-listed firms.
“This collaboration marks another milestone in our work with Natixis Investment Managers’ affiliates,” said Sylvain Forté, CEO and co-founder of SESAMm. “Flexstone stands out for its rigorous and forward-looking approach to ESG integration. We’re proud to support their teams with AI-powered insights that help strengthen due diligence and portfolio monitoring across their global investments.”
With SESAMm, users gain real-time visibility into ESG and reputational risks across millions of public and private companies worldwide. The platform leverages multilingual large language models to analyze content from over 4 million sources in 100+ languages, providing fully auditable data and early detection of potential red flags, empowering investment teams to strengthen both due diligence and ongoing portfolio monitoring.
“SESAMm’s controversy insights demonstrated both speed and quality, and the platform appears to integrate smoothly into our existing due diligence and monitoring processes. While we have not yet fully deployed the tool, we see strong potential for enhancing ESG risk identification and mitigation,” said Samira Boussem, Managing Director, Global Head of Sustainability Investment at Flexstone Partners. “We expect that it will bring a new level of efficiency to our analysis.”
About Flexstone Partners
Flexstone Partners ("Flexstone") 6 is an affiliate of Natixis Investment Managers, one of the largest asset managers in the world with over $1,427 billion in assets under management. The company manages $10.6 billion in assets 7and offers institutional investors worldwide tailored investment and advisory services in private equity. Flexstone's strategies in co-investment and the secondary market primarily focus on small and mid-cap segments, growth equity, and emerging managers in the United States, Europe, and Asia. With over 56 experts based in New York, Paris, Geneva, and Singapore, Flexstone’s international team addresses the needs of its clients around the globe. Composed of a team of specialists with complementary profiles, Flexstone has in-depth market knowledge and unique expertise in private equity. It is present in the most promising markets across North America, Europe, and Asia. For more information: www.flexstonepartners.com
About SESAMm
SESAMm is a global leader in controversy data, leveraging advanced large language models and generative AI to uncover ESG, reputational, and supplier risks in seconds. Our AI-powered platform surfaces real-time insights, even in low-disclosure markets, on millions of companies and infrastructure projects, supporting more informed decisions, enhanced due diligence, and regulatory alignment at scale. We work with leading firms, including Carlyle, Warburg, Natixis, RBI, Sustainable Fitch, Oddo, and others. SESAMm has raised $50M from renowned investors and operates across four continents. Learn more at www.sesamm.com
SESAMm’s AI Technology Reveals ESG Insights
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