IDEXX Laboratories, Inc. develops, manufactures, and distributes products and services primarily for the companion animal veterinary, livestock and poultry, dairy, and water testing markets worldwide. The company operates through CAG; Water Quality Products; LPD; and Other segments. It provides point-of-care veterinary diagnostic products, including instruments, consumables, and rapid assay test kits; veterinary reference laboratory diagnostic and consulting services; practice management and diagnostic imaging systems and services for veterinarians; and health monitoring, biological materials testing, and laboratory animal diagnostic instruments and services for biomedical research community. The company also offers diagnostic and health-monitoring products for livestock, poultry, and dairy; products that test water for various microbiological contaminants; and point-of-care electrolytes and blood gas analyzers and SARS-CoV-2 RT-PCR that are used in the human point-of-care medical diagnostics market; in-clinic chemistry, blood and urine chemistry, hematology, and SediVue Dx analyzers; SNAP rapid assays test kits. In addition, it provides Colilert, Colilert-18, and Colisure tests, which detect the presence of total coliforms and E. coli in water; Enterolert, Pseudalert, Filta-Max and Filta-Max xpress, Legiolert, and Quanti-Tray products; veterinary software and services for independent veterinary clinics and corporate groups. The company markets its products through marketing, customer service, sales, and technical service groups, as well as through independent distributors and other resellers. IDEXX Laboratories, Inc. was incorporated in 1983 and is headquartered in Westbrook, Maine.

IDEXX Laboratories, Inc.

Initial Statement of Beneficial Ownership

Insider	Title	Date	Shares	% Owned	Market Value
Jonathan J. Mazelsky	President, CEO & Director Show All	2025-09-04	82.4K	0.103246%	53.0M
Brian P. McKeon	Former Executive VP & Special Advisor Show All	2025-02-19	49.6K	0.062115%	22.5M
Nimrata Khatra Hunt	Executive Vice President of Global Strategy & Commercial Show All	2025-11-10	21.3K	0.026686%	15.2M
Michael Erickson	Executive VP and GM of Point of Care Diagnostics & Telemedicine Show All	2025-08-14	11.3K	0.014135%	7.3M
Sophie V. Vandebroek	Independent Director Show All	2025-05-13	8.7K	0.010885%	4.4M
Michael J. Lane
Sharon E. Underberg
Andrew Emerson
Daniel M. Junius
Michael P. Johnson
Michael Schreck
M. Anne Szostak
Martin Alderson Smith	—
George J. Fennell
Sam A. Samad
Total			204.9K	0.256577%	121.4M