Sec Form 4 Filing - Sarcevic Ademir @ PENTAIR plc - 2019-01-02

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 Sarcevic Ademir 2. Issuer Name and Ticker or Trading Symbol PENTAIR plc [ PNR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) SVP & Chief Accounting Officer (Last) (First) (Middle) 5500 WAYZATA BLVD., SUITE 800 3. Date of Earliest Transaction (MM/DD/YY) 01/02/2019 (Street) GOLDEN VALLEY, MN55416 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 Shares - Restricted Stock Units 01/02/2019 A( 1 ) 1,754 A $ 0 8,791.145 ( 2 ) ( 3 ) D Common Shares 01/02/2019 F( 4 ) 733 D $ 37.77 1,287 ( 2 ) D Common Shares 01/03/2019 S( 5 ) 1,287 D $ 37.61 0 D Common Shares 226.504 ( 6 ) ( 3 ) 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 Option (right to buy) $ 37.77 01/02/2019 A( 7 ) 7,732 ( 8 ) 01/02/2029 Common Shares 7,732 $ 0 7,732 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Sarcevic Ademir 5500 WAYZATA BLVD., SUITE 800 GOLDEN VALLEY, MN55416 SVP & Chief Accounting Officer Signatures /s/ John K. Wilson, Attorney-in-Fact for Ademir Sarcevic 01/04/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Restricted stock units granted pursuant to and subject to a vesting condition of the Pentair plc 2012 Stock and Incentive Plan. Each restricted stock unit represents a right to receive one Pentair plc share upon vesting. ( 2 )End-of-period holdings reflect the vesting of restricted stock units that were previously reported. ( 3 )End-of-period holdings include shares acquired under a dividend reinvestment plan in exempt transaction not required to be reported pursuant to Section 16(a). ( 4 )Shares surrendered to pay taxes applicable to vesting of restricted stock units. ( 5 )The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2018. ( 6 )Since the date of the reporting person's last ownership report, the reporting person transferred 232.7157 common shares held by the ESOP to his ex-spouse pursuant to a domestic relations order. The reporting person no longer reports as beneficially owned any securities owned by his ex-spouse. ( 7 )Employee stock option granted under the Pentair plc 2012 Stock and Incentive Plan. ( 8 )One-third of the stock options become exercisable on the first, second and third anniversary of the grant.

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).

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