X0306 4 2017-10-10 0 0000891024 PATTERSON COMPANIES, INC. PDCO 0001665282 BAKER KELLY A 1031 MENDOTA HEIGHTS ROAD ST. PAUL MN 55120 0 1 0 0 CHRO Common Stock 2017-10-10 4 A 0 105 32.8525 A 16298 D Employee Stock Option 47.51 2020-07-01 2027-07-01 Common Stock 11148 11148 D Employee Stock Option 48.47 2019-07-01 2026-07-01 Common Stock 10379 10379 D Employee Stock Option 49.52 2026-02-01 Common Stock 25000 25000 D Represents shares acquired by Reporting Person pursuant to the Patterson Companies, Inc. Employee Stock Purchase Plan. Includes 10,693 Restricted Stock Units ("RSUs") awarded on 2/1/2016 and 7/1/2016 to Reporting Person pursuant to the Patterson Companies, Inc. 2015 Omnibus Incentive Plan. Each RSU represents a right, contingent upon continued employment, to receive one share of common stock. The 2/1/2016 award vests as follows: 4,645 shares vest 2/1/2018 and 4,644 shares vest 2/1/2019. The 7/1/2016 award vests as follows: 351 shares vest each year 7/1/2018 through 7/1/2021. Stock option granted pursuant to the Patterson Companies, Inc. 2015 Omnibus Incentive Plan on 7/1/2017. Stock option granted pursuant to the Patterson Companies, Inc. 2015 Omnibus Incentive Plan on 7/1/2016. Stock option granted pursuant to the Patterson Companies, Inc. 2015 Omnibus Incentive Plan on 2/1/2016. This stock option becomes exercisable as follows: 25% on 2/1/2019, 25% on 2/1/2020 and 50% on 2/1/2021. Les B. Korsh, by Power of Attorney 2017-10-11