Exhibit 99.1 IDEXX Announces First Quarter Results May 5, 2026 Page 2 of 17 IDEXX Laboratories Announces First Quarter Results WESTBROOK, Maine, May 5, 2026— IDEXX Laboratories, Inc. (NASDAQ: IDXX), a global leader in pet healthcare innovation, today announced first quarter results. First Quarter Results The Company reports revenues of $1,141 million for the first quarter of 2026, an increase of 14% as reported and 11% organic, driven by Companion Animal Group ("CAG") growth of 15% as reported and 12% organ ...