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Jonathan Mazelsky

President, Chief Executive Officer & Director, Idexx Laboratories

Search every verified Jonathan Mazelsky interview, podcast appearance, and on-the-record quote — each transcript cross-checked by AI and human review to confirm speaker identity. Jonathan Mazelsky, president and CEO of IDEXX Laboratories, participated in the company’s quarterly earnings calls from the first quarter of 2025 through the first quarter of 2026. During these calls, he discussed the company’s financial performance and outlook, including raising full-year revenue and EPS guidance in each quarter. In the first quarter of 2026, Mazelsky noted that this would be his final earnings call as CEO before transitioning to executive chair, and he stated that he remains “incredibly optimistic about the future of Idex.” He highlighted the launch of the IDEX Cancer DX panel, which he described as a “major evolution” in diagnostics, and noted that over 2,500 practices had ordered the test by the second quarter of 2025. Mazelsky also discussed the InView DX platform, including its ear cytology and blood morphology capabilities, and expressed excitement about the planned addition of fine-needle aspiration (FNA) testing for lumps and bumps. Mazelsky addressed industry trends, including a decline in clinical visits, which he attributed to macroeconomic pressures and consumer trade-offs, particularly in wellness visits. He stated that the company had seen “green shoots” in non-wellness visits and that diagnostic frequency and utilization continued to expand. Regarding tariffs, Mazelsky said the company was “relatively well positioned” with 65% of consolidated revenues in the U.S. and less than 1% from China, but acknowledged the company was “not immune” to a “highly dynamic tariff environment.” He also noted that the estimated pet population remained elevated compared to 2019, which he said supported “strong tailwinds” to the business.

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