Sec Form 4 Filing - SHIRLEY ERIC R @ PATTERSON COMPANIES, INC. - 2020-12-31

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

OMB APPROVAL OMB Number: 3235-0287 Expires: November 30, 2011 Estimated average burden hours per response... 0.5

1. Name and Address of Reporting Person SHIRLEY ERIC R 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) President-Patterson Dental (Last) (First) (Middle) 1031 MENDOTA HEIGHTS ROAD 3. Date of Earliest Transaction (MM/DD/YY) 12/31/2020 (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 12/31/2020 A( 1 ) 198 A $ 17.3655 51,643 ( 2 ) ( 3 ) ( 4 ) D Common Stock 248 ( 5 ) 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 ( 6 ) $ 23.57 ( 7 ) 07/14/2030 Common Stock 24,780 24,780 D Employee Stock Options ( 8 ) $ 22.25 ( 9 ) 07/01/2029 Common Stock 33,784 33,784 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other SHIRLEY ERIC R 1031 MENDOTA HEIGHTS ROAD ST. PAUL, MN55120 President-Patterson Dental Signatures Les B. Korsh, by Power of Attorney 01/05/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Shares acquired by Reporting Person pursuant to the Patterson Companies, Inc. Employee Stock Purchase Plan. ( 2 )Includes 26,607 Restricted Stock Units ("RSUs") granted to Reporting Person pursuant to the Patterson Companies, Inc. Amended and Restated 2015 Omnibus Incentive Plan ("Plan") on 2/4/2019 as an inducement award granted pursuant to the Plan. The RSUs will vest, assuming continued employment, 100% on 2/4/2022. ( 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 )Includes 9,829 RSUs awarded to Reporting Person on 7/1/2019 and 7/14/2020 pursuant to the Plan. The RSUs vest contingent upon continued employment as follows: 5,056 units vest on 7/1/2022 and 4,773 units vest on 7/14/2023. ( 5 )Represents shares of common stock indirectly held by the Report Person's Employee Stock Ownership Plan (ESOP) account through April 25, 2020. ( 6 )Stock options granted pursuant to the Plan on 7/14/2020. ( 7 )Options are exercisable as follows: 33.3% on 7/14/2021, 33.3% on 7/14/2022 and 33.4% on 7/14/2023. ( 8 )Stock options granted pursuant to the Plan on 7/1/2019. ( 9 )Options are exercisable as follows: 33.3% on 7/1/2020, 33.3% on 7/1/2021 and 33.4% on 7/1/2022.

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).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.