PENTAIR plc — Director's Dealing 2018

May 4, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: PENTAIR plc (PNR)
CIK: 0000077360
Period of Report: 2018-05-02

Reporting Person: Peltz Matthew H. (Director)
Reporting Person: TRIAN FUND MANAGEMENT, L.P. (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-05-02	Common (Ordinary) Shares - Restricted Stock Units	A	2862	$0.00	Acquired	2862	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common (Ordinary) Shares	15411582	Indirect

Footnotes

F1: 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 share of Pentair plc common shares upon vesting.

F2: Trian Fund Management, L.P ("Trian Management") serves as the management company for Trian Partners, L.P., Trian Partners Master Fund, L.P., Trian Partners Parallel Fund I, L.P., Trian Partners Strategic Investment Fund II, L.P., Trian Partners Strategic Investment Fund-A, L.P., Trian Partners Strategic Investment Fund-N, L.P., Trian Partners Strategic Investment Fund-D, L.P., Trian Partners Fund (Sub)-G, L.P., Trian Partners Strategic Fund-G II, L.P., Trian Partners Strategic Fund-G III, L.P., Trian Partners Strategic Fund-K, L.P. and Trian Partners Strategic Fund-C, Ltd. (collectively, the "Trian Entities") and as such determines the investment and voting decisions of the Trian Entities with respect to the shares of the Issuer held by them.

F3: (FN 2, contd.) Mr. Peltz is a limited partner of certain affiliates of the Trian Entities and Trian Management and therefore may be deemed to have an indirect interest in the shares which they hold. The Reporting Persons disclaim beneficial ownership of such shares except to the extent of their respective pecuniary interests therein and this report shall not be deemed an admission that the Reporting Persons are the beneficial owner of such securities for purposes of Section 16 or for any other purpose. Mr. Peltz is a director of the Issuer.