Sec Form 4 Filing - Chiu Adrian C @ PENTAIR plc - 2022-02-21

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 Chiu Adrian C 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) EVP CHRO Chief Transform. Off (Last) (First) (Middle) 5500 WAYZATA BLVD., SUITE 900 3. Date of Earliest Transaction (MM/DD/YY) 02/21/2022 (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 02/21/2022 A( 1 ) 1,178 A $ 0 3,386.6816( 2 )( 3 ) D Common Shares 02/22/2022 F( 4 ) 466 D $ 56.37 2,920.6816( 2 )( 3 ) D Common Shares - Restricted Stock Units 10,848.801( 3 ) D Common Shares - ESOP 406.208( 3 ) I Plan Agent

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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Chiu Adrian C 5500 WAYZATA BLVD., SUITE 900 GOLDEN VALLEY, MN55416 EVP CHRO Chief Transform. Off Signatures /s/ John K. Wilson, Attorney-in-Fact for Adrian C. Chiu 02/23/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Reflects the settlement of performance share units in shares earned for the performance period ended December 31, 2021. The Compensation Committee certified the achievement of the performance goals on February 21, 2022. ( 2 )End-of-period holdings include monthly purchases under the ESPP in exempt transactions pursuant to Rule 16b-3(c). ( 3 )End-of-period holdings include shares acquired under a dividend reinvestment plan in exempt transactions not required to be reported pursuant to Section 16(a). ( 4 )Shares surrendered to pay taxes applicable to settlement of performance share units.

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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