Astorg, a pan European private equity firm, has signed a definitive agreement to acquire New York-listed Thermo Fisher Scientific\u2019s microbiology business for approximately US$1.075bn, consisting of cash and a US$50m seller note.<\/p>\n
The microbiology business provides antimicrobial susceptibility testing and culture media solutions for clinical, pharmaceutical and food safety testing. It generated US$645m in revenue in 2025. Through the transaction, Thermo Fisher\u2019s microbiology business will become an independent, privately owned platform with approximately 2,400 employees, operating 13 manufacturing and R&D sites globally.<\/p>\n
\u201cThis investment reflects our strong conviction in microbiology diagnostics and exemplifies Astorg\u2019s approach to creative dealmaking, leveraging deep sector expertise to identify global assets, navigate complexity and translate it into a clear, executable growth strategy,\u201d said Judith Charpentier<\/a>, co-managing partner and head of Healthcare at Astorg.<\/p>\n Astorg will partner with management to scale the business\u2019 next phase of development, focusing on accelerating organic growth, executing M&A, and further strengthening operational capabilities.<\/p>\n \u201cWe are excited to build the next phase,\u201d said Olivier Lieven<\/a>, partner, and Paul Arhanchiague<\/a>, managing director at Astorg. \u201cWe see a wealth of opportunities for the business, across product innovation, commercial depth, and M&A.\u201d<\/p>\n For Thermo Fisher, the transaction reflects: \u201cour active management of the company and provides additional capital we can deploy to create shareholder value,\u201d said Marc Casper<\/a>, chairman and CEO. \u201cWe believe the microbiology business is an excellent fit within Astorg\u2019s portfolio.\u201d<\/p>\n Astorg was advised by Evercore and Moelis & Company (financial advisors), and Latham (legal advisor). Thermo Fisher management was advised by Perella Weinberg Partners and Wells Fargo (financial advisors) and Cravath, Swaine & Moore (legal advisor).<\/p>\n