PENTAIR plc — Director's Dealing 2010

Mar 1, 2010

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: PENTAIR INC (PNR)
CIK: 0000077360
Period of Report: 2010-02-23

Reporting Person: LAGESON ANGELA D (Sr. Vice President, Secretary)

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	4451.898	Direct
Common Stock - ESOP	657.0985	Indirect
Common Stock - Restricted Stock Units	1986	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Employee Stock Option (right to buy)	$41.12	2015-03-01	Common Stock (7863)		Direct
Employee Stock Option (right to buy)	$41.17	2016-03-01	Common Stock (5793)		Direct
Employee Stock Option (right to buy)	$31.56	2017-03-01	Common Stock (6431)		Direct
Employee Stock Option (right to buy)	$32.40	2018-03-03	Common Stock (5597)		Direct
Employee Stock Option (right to buy)	$19.13	2019-03-03	Common Stock (9629)		Direct

Footnotes

F1: Amount of securities beneficially owned includes 4,399 restricted shares that remain subject to a vesting condition; and 52.898 shares acquired under a dividend reinvestment plan.

F2: 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.

F3: One-third of the stock options become exercisable on the first, second, and third anniversary of the grant.

F4: Employee stock option granted under the Pentair, Inc. Omnibus Stock Incentive Plan.

F5: Employee stock option granted under the Pentair, Inc. 2008 Omnibus Stock Incentive Plan, as Amended.