X0306 4 2022-07-01 0 0000891024 PATTERSON COMPANIES, INC. PDCO 0001652545 KORSH LES B 1031 MENDOTA HEIGHTS ROAD ST. PAUL MN 55120 0 1 0 0 Chief Legal Officer Common Stock 2022-07-01 4 F 0 4156 30.59 D 73330 D Common Stock 2022-07-01 4 F 0 1896 30.59 D 71434 D Common Stock 2022-07-01 4 A 0 4904 30.59 A 76338 D Common Stock 2028 I By ESOP Employee Stock Options 30.59 2022-07-01 4 A 0 16892 30.59 A 2032-07-01 Common Stock 16892 16892 D Employee Stock Options 30.77 2031-07-01 Common Stock 17339 17339 D Employee Stock Options 23.57 2030-07-14 Common Stock 24780 24780 D Employee Stock Options 22.25 2029-07-01 Common Stock 33784 33784 D Employee Stock Options 22.48 2021-07-01 2028-07-01 Common Stock 14179 14179 D Employee Stock Options 47.51 2020-07-01 2027-07-01 Common Stock 11845 11845 D Employee Stock Options 48.47 2019-07-01 2026-07-01 Common Stock 10379 10379 D Employee Stock Options 56.66 2025-07-01 Common Stock 25000 25000 D On July 1, 2022, the restricted stock unit ("RSU") equivalents vested per the Patterson Companies, Inc. Amended and Restated 2015 Omnibus Incentive Plan ("Plan) and were paid out in common stock. The Company withheld shares to satisfy the tax liability associated with the vesting. Includes an aggregate of 16,637 RSUs awarded on 7/1/2017, 7/1/2018, 7/1/2019, 7/14/2020 and 7/1/2021 to Reporting Person pursuant to the Plan. The RSUs vest contingent upon continued employment as follows: 7,938 units vest on 7/1/2022, 2,436 units vest on 7/1/2023, 4,773 units vest on 7/14/2023 and 1,490 units vest on 7/1/2024. Represents shares of common stock withheld to satisfy a portion of tax liability upon the lapse of restrictions on RSUs issued pursuant to the Plan. Includes an aggregate of 8,699 RSUs awarded on 7/1/2018, 7/1/2019, 7/14/2020 and 7/1/2021 to Reporting Person pursuant to the Plan. The RSUs vest contingent upon employment as follows: 2,436 units vest 7/1/2023, 4,773 units vest 7/14/2023 and 1,490 units vest 7/1/2024. Represents RSUs awarded on 7/1/2022 to Reporting Person pursuant to the Plan. The RSUs awarded vest, assuming continued employment, 33.3% on 7/1/2023, 33.3% on 7/1/2024 and 33.4% on 7/1/2025. Represents shares of common stock indirectly held by the Reporting Person's Employee Stock Ownership Plan (ESOP) account through April 29, 2022. Stock options granted pursuant to the Plan on 7/1/2022. Options are exercisable as follows: 33.3% on 7/1/2023, 33.3% on 7/1/2024 and 33.4% on 7/1/2025. 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. Stock options granted pursuant to the Plan on 7/1/2017. Stock options granted pursuant to the Plan on 7/1/2016. Stock options granted pursuant to the Patterson Companies, Inc. Amended and Restated Equity Incentive Plan on 7/1/2015. Options are exercisable as follows: 25% on 7/1/2018, 25% on 7/1/2019 and 50% on 7/1/2020. Les B. Korsh 2022-07-06