PENTAIR plc — Director's Dealing 2010

Jan 7, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: PENTAIR INC (PNR)
CIK: 0000077360
Period of Report: 2010-01-04

Reporting Person: MERRIMAN RONALD (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-01-04	Common Stock - Restricted Stock Units	A	1379	$0.00	Acquired	1379	Direct
2010-01-04	Common Stock	M	1207.843	$0.00	Acquired	11453.951	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-01-04	Nonqualified Stock Option (right to buy)	$33.38	A	6140	Acquired	2020-01-04	Common Stock (6140)	Direct
2010-01-04	Phantom Stock Units (Deferred Compensation)	$1.00	M	1207.843	Disposed		Common Stock (1207.843)	Indirect

Footnotes

F1: Restricted stock units granted pursuant to and subject to a vesting condition of the Pentair, Inc. 2008 Omnibus Stock Incentive Plan, as Amended. Each restricted stock unit represents a right to receive one share of Pentair, Inc. common stock upon vesting. Vested shares of Pentair, Inc. common stock will be delivered to the reporting person in accordance with their irrevocable deferral election.

F2: 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).

F3: Nonqualified stock option granted under the Pentair, Inc. 2008 Omnibus Stock Incentive Plan, as Amended.

F4: One-third of the stock options become exercisable on the first, second, and third anniversary of the grant.

F5: Phantom stock units convert into common stock on a one-for-one basis.

F6: Settlement of phantom stock units in accordance with reporting person's irrevocable election.