Sec Form 4 Filing - KORSH LES B @ PATTERSON COMPANIES, INC. - 2022-04-14

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person KORSH LES B 2. Issuer Name and Ticker or Trading Symbol PATTERSON COMPANIES, INC. [ PDCO] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Legal Officer (Last) (First) (Middle) 1031 MENDOTA HEIGHTS ROAD 3. Date of Earliest Transaction (MM/DD/YY) 04/14/2022 (Street) ST. PAUL, MN55120 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 04/14/2022 S( 1 ) 6,000 D $ 34.9598 77,486( 2 )( 3 ) D Common Stock 1,976( 4 ) I By ESOP

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Employee Stock Options( 5 ) $ 30.77 ( 6 ) 07/01/2031 Common Stock 17,339 17,339 D Employee Stock Options( 7 ) $ 23.57 ( 8 ) 07/14/2030 Common Stock 24,780 24,780 D Employee Stock Options( 9 ) $ 22.25 ( 10 ) 07/01/2029 Common Stock 33,784 33,784 D Employee Stock Options( 11 ) $ 22.48 07/01/2021 07/01/2028 Common Stock 14,179 14,179 D Employee Stock Options( 12 ) $ 47.51 07/01/2020 07/01/2027 Common Stock 11,845 11,845 D Employee Stock Options( 13 ) $ 48.47 07/01/2019 07/01/2026 Common Stock 10,379 10,379 D Employee Stock Options( 14 ) $ 56.66 ( 15 ) 07/01/2025 Common Stock 25,000 25,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other KORSH LES B 1031 MENDOTA HEIGHTS ROAD ST. PAUL, MN55120 Chief Legal Officer Signatures Les B. Korsh 04/18/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )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. ( 2 )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. ( 3 )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. ( 4 )Represents shares of common stock indirectly held by the Reporting Person's Employee Stock Ownership Plan (ESOP) account through May 21, 2021. ( 5 )Stock options granted pursuant to the Plan on 7/1/2021. ( 6 )Options are exercisable as follows: 33.3% on 7/1/2022, 33.3% on 7/1/2023 and 33.4% on 7/1/2024. ( 7 )Stock options granted pursuant to the Plan on 7/14/2020. ( 8 )Options are exercisable as follows: 33.3% on 7/14/2021, 33.3% on 7/14/2022 and 33.4% on 7/14/2023. ( 9 )Stock options granted pursuant to the Plan on 7/1/2019. ( 10 )Options are exercisable as follows: 33.3% on 7/1/2020, 33.3% on 7/1/2021 and 33.4% on 7/1/2022. ( 11 )Stock options granted pursuant to the Plan on 7/1/2018. ( 12 )Stock options granted pursuant to the Plan on 7/1/2017. ( 13 )Stock options granted pursuant to the Plan on 7/1/2016. ( 14 )Stock options granted pursuant to the Patterson Companies, Inc. Amended and Restated Equity Incentive Plan on 7/1/2015. ( 15 )Options are exercisable as follows: 25% on 7/1/2018, 25% on 7/1/2019 and 50% on 7/1/2020.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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