X0306 4 2022-04-14 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 2022-04-14 4 S 0 6000 34.9598 D 77486 D Common Stock 1976 I By ESOP 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 The transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 Plan adopted by the Reporting Person on December 8, 2021. 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. Includes 14,410 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 RSU equivalents will automatically convert into shares of common stock. Represents shares of common stock indirectly held by the 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. 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 2022-04-18