X0306 4 2021-11-15 0000794172 MERIDIAN BIOSCIENCE INC VIVO 0001201184 WELTZIEN LOURDES 3471 RIVER HILLS DRIVE CINCINNATI OH 45244 1 EVP, Life Science Common Stock 2021-11-15 4 J 0 32709 D 54928 D Common Stock 2021-11-15 4 A 0 32709 A 87637 D Restricted share units granted pursuant to 2012 Stock Incentive Plan rescinded by the Issuer. Restricted share units granted pursuant to 2021 Omnibus Award Plan scheduled to vest as follows: (i) 20,534 on November 15, 2022; and (ii) 12,175 on November 15, 2023. /s/ Bryan T. Baldasare as Attorney-in-Fact for Lourdes G. Weltzien 2021-11-16