X0306 4 2012-09-28 0 0000077360 PENTAIR INC PNR 0001189049 HOGAN RANDALL J 5500 WAYZATA BLVD., SUITE 800 GOLDEN VALLEY MN 55416 1 1 0 0 Chairman & Chief Exec. Officer Common Shares 2012-09-28 4 M 0 3600 35.99 A 33202 D Common Shares 2012-09-28 4 S 0 3600 45.00 D 29602 D Common Shares 2012-10-01 4 M 0 55300 35.99 A 84902 D Common Shares 2012-10-01 4 S 0 55300 44.06 D 29602 D Employee Stock Option (right to buy) 35.99 2012-09-28 4 M 0 3600 0 D 2007-11-05 2013-01-02 Common Shares 3600 55300 D Employee Stock Option (right to buy) 35.99 2012-10-01 4 M 0 55300 0 D 2007-11-05 2013-01-02 Common Shares 55300 0 D The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 30, 2012. The price in Column 4 is a weighted average price. The prices actually received ranged from $43.89 to $44.52. The reporting person has provided to the issuer, and will provide to any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range for all transactions reported in this Form 4 utilizing an average weighted price. Reload stock option becomes exercisable upon grant and expires on the same date as the original option grant. Issuer Name and Ticker Symbol: Pentair Ltd. [PNR] /s/ John K. Wilson, Attorney-in-Fact for Randall J. Hogan 2012-10-02