Quanterix Corporation announced that its Board of Directors has appointed Everett Cunningham as the Company's next President and a member of the Board, effective January 19, 2026. On January 8, 2026, Masoud Toloue, Ph.D., President of Quanterix Corporation entered into a separation agreement and release with the Company (the ?Separation Agreement?), pursuant to which his employment as President and Chief Executive Officer of the Company has ended and he has resigned as a member of the Board of Directors (the ?Board?), both effective as of January 19, 2026. Following Mr. Cunningham?s start date, Dr. Toloue will remain available to the Company in an advisory capacity to support continuity and help ensure a smooth leadership transition.

Contemporaneous with Mr. Cunningham?s appointment, Bill Donnelly, Executive Chair of the Board, will transition to his prior role as non-executive Chair of the Board. Everett Cunningham, age 58, has served as Chief Commercial Officer of Illumina Inc. since June 2024. Prior to Illumina, he was Chief Commercial Officer of Exact Sciences Corporation from 2021 to 2024, overseeing global marketing, sales, and customer service functions.

Before joining Exact Sciences, Mr. Cunningham served as President & Chief Executive Officer of GE Healthcare?s U.S. & Canada region from 2019 to 2021. Earlier, he served as Senior Vice President, Commercial at Quest Diagnostics Inc. where he was responsible for global sales, marketing, and commercial operations from 2012 to 2019. And prior to that, from 1991 to 2012, Mr. Cunningham held a range of senior leadership positions at Pfizer Inc. including Regional President, Established Products for Asia Pacific, Senior Director of Worldwide Learning and Development, Senior Director of Business Operations, Vice President Sales for U.S. Pharmaceuticals, and Vice President of Global Corporate Human Resources.

Mr. Cunningham currently serves on the boards of Arvinas Inc. and Visby Medical. At Arvinas, he is a member of the Compensation and Audit committees. Mr. Cunningham holds a bachelor?s degree in economics from Northwestern University.