X0306 4 2021-07-01 0 0000891024 PATTERSON COMPANIES, INC. PDCO 0001591945 Frohning Andrea L. 1031 MENDOTA HEIGHTS ROAD ST. PAUL MN 55120 0 1 0 0 Chief Human Resources Officer Common Stock 2021-07-01 4 F 0 155 30.77 D 37090 D Common Stock 2021-07-01 4 A 0 4469 30.77 A 41559 D Common Stock 1070 I By ESOP Employee Stock Options 30.77 2021-07-01 4 A 0 17339 30.77 A 2031-07-01 Common Stock 17339 17339 D Employee Stock Options 23.57 2030-07-14 Common Stock 22026 22026 D Employee Stock Options 22.25 2029-07-01 Common Stock 30030 30030 D Employee Stock Options 22.48 2021-07-01 2028-07-01 Common Stock 10009 10009 D Represents shares of common stock withheld for payment of taxes incurred upon the lapse of restrictions on restricted stock units ("RSUs") issued pursuant to the Patterson Companies, Inc. Amended and Restated 2015 Omnibus Incentive Plan ("Plan"). Includes an aggregate of 10,072 RSUs awarded on 7/1/2018, 7/1/2019 and 7/14/2020 to Reporting Person pursuant to the Plan. The RSUs vest contingent upon continued employment as follows: 5,161 units vest 7/1/2022, 668 units vest 7/1/2023 and 4,243 units vest 7/14/2023. Includes 12,810 RSU equivalents attributable to the July 1, 2020 determination by the Compensation Committee that the performance criteria for the period of April 27, 2019 through April 25, 2020 applicable to non-derivative performance units issued on July 1, 2019 had been satisfied. Subject to continued employment of the Reporting Person through July 1, 2022, the restricted stock unit equivalents will automatically convert into shares of common stock. Represents RSUs awarded on 7/1/2021 to Reporting Person pursuant to the Plan. The RSUs awarded vest, assuming continued employment, 33.3% on 7/1/2022, 33.3% on 7/1/2023 and 33.4% on 7/1/2024. Represents shares of common stock indirectly held by Reporting Person's Employee Stock Ownership Plan ("ESOP") account through May 21, 2021. Stock options granted pursuant to the Plan on 7/1/2021. Options are exercisable as follows: 33.3% on 7/1/2022, 33.3% on 7/1/2023 and 33.4% on 7/1/2024. Stock options granted pursuant to the Plan on 7/14/2020. Options are exercisable as follows: 33.3% on 7/14/2021, 33.3% on 7/14/2022 and 33.4% on 7/14/2023. Stock options granted pursuant to the Plan on 7/1/2019. Options are exercisable as follows: 33.3% on 7/1/2020, 33.3% on 7/1/2021 and 33.4% on 7/1/2022. Stock options granted pursuant to the Plan on 7/1/2018. Les B. Korsh, by Power of Attorney 2021-07-06