X0304 4/A 2012-01-13 2012-01-19 0 0000788920 PRO DEX INC PDEX 0001478067 Swenson Nicholas John 3033 EXCELSIOR BOULEVARD, SUITE 560 MINNEAPOLIS MN 55416 0 0 1 0 Common Stock 2012-01-13 4 P 0 1145 2.493 A 1145 I By AO Partners I, LP Common Stock 257506 D Common Stock 172271 I By Glenhurst Co. The Form 4 filed on January 19, 2012, which this Form 4/A amends, reported the shares were purchased by the reporting person directly. The shares were actually purchased by AO Partners I, LP. This error was also reported on four Form 4s filed by the reporting person after the original Form 4. Shares are held by AO Partners I, LP, a limited partnership of which AO Partners, LLC is the general partner. The reporting person is the sole owner of AO Partners, LLC. Nicholas J. Swenson 2012-03-06