X0304 4 2012-01-03 0 0000077360 PENTAIR INC PNR 0001197608 GLENN T MICHAEL 5500 WAYZATA BLVD., SUITE 800 GOLDEN VALLEY MN 55416 1 0 0 0 Common Stock - Restricted Stock Units 2012-01-03 4 A 0 1700 0 A 2936 D Common Stock - Deferral Plan 1317.154 I Plan Agent Nonqualified Stock Option (right to buy) 34.12 2012-01-03 4 A 0 6332 0 A 2013-01-03 2022-01-03 Common Stock 6332 6332 D Restricted stock units granted pursuant to and subject to a vesting condition of the Pentair, Inc. 2008 Omnibus Stock Incentive Plan, as Amended and Restated. 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. End-of-period holdings reflect the vesting of restricted stock units that were previously reported. Shares of Pentair, Inc. common stock will be delivered to the reporting person in accordance with their irrevocable deferral election. 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). Nonqualified stock option granted under the Pentair, Inc. 2008 Omnibus Stock Incentive Plan, as Amended and Restated. One-third of the stock options become exercisable on the first, second, and third anniversary of the grant. /s/ John K. Wilson, Attorney-in-Fact for T. Michael Glenn 2012-01-05