Exhibit 99.1 Neogen Announces Preliminary 1 Second-Quarter 2025 Results 1 Results presented in this release are preliminary and unaudited estimates based on information currently available to the Company. Such results could differ from the final amounts the Company reports in its Quarterly Report on Form 10-Q for the fiscal quarter ended November 30, 2024. The Company assumes no obligation, and does not intend, to update these estimates prior to filing its Form 10-Q. 2 Non-GAAP financial measures; see expla ...