Sec Form 4 Filing - BAKER KELLY A @ PATTERSON COMPANIES, INC. - 2017-10-10

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 BAKER KELLY A 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) CHRO (Last) (First) (Middle) 1031 MENDOTA HEIGHTS ROAD 3. Date of Earliest Transaction (MM/DD/YY) 10/10/2017 (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 10/10/2017 A( 1 ) 105 A $ 32.8525 16,298 ( 2 ) D

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 Option ( 3 ) $ 47.51 07/01/2020 07/01/2027 Common Stock 11,148 11,148 D Employee Stock Option ( 4 ) $ 48.47 07/01/2019 07/01/2026 Common Stock 10,379 10,379 D Employee Stock Option ( 5 ) $ 49.52 ( 6 ) 02/01/2026 Common Stock 25,000 25,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other BAKER KELLY A 1031 MENDOTA HEIGHTS ROAD ST. PAUL, MN55120 CHRO Signatures Les B. Korsh, by Power of Attorney 10/11/2017 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents shares acquired by Reporting Person pursuant to the Patterson Companies, Inc. Employee Stock Purchase Plan. ( 2 )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. ( 3 )Stock option granted pursuant to the Patterson Companies, Inc. 2015 Omnibus Incentive Plan on 7/1/2017. ( 4 )Stock option granted pursuant to the Patterson Companies, Inc. 2015 Omnibus Incentive Plan on 7/1/2016. ( 5 )Stock option granted pursuant to the Patterson Companies, Inc. 2015 Omnibus Incentive Plan on 2/1/2016. ( 6 )This stock option becomes exercisable as follows: 25% on 2/1/2019, 25% on 2/1/2020 and 50% on 2/1/2021.

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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