X0306 4 2012-09-14 0 0000788920 PRO DEX INC PDEX 0001478067 Swenson Nicholas John 3033 EXCELSIOR BOULEVARD, SUITE 560 MINNEAPOLIS MN 55416 0 0 1 0 Common Stock 2012-09-14 4 L 0 3362 1.698 A 41874 I By AO Partners I, LP Common Stock 2012-09-18 4 L 0 300 1.69 A 42174 I By AO Partners I, LP Common Stock 2012-09-20 4 L 0 386 1.69 A 42560 I By AO Partners I, LP Common Stock 2012-10-01 4 P 0 2384 1.795 A 44944 I By AO Partners I, LP Common Stock 172271 I By Glenhurst Co. Common Stock 257506 D The price in Column 4 is a weighted average price. The prices actually paid ranged from $1.69 to $1.70. 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 purchased at each price within the range for all transactions reported in this Form 4 utilizing an average weighted price. The price in Column 4 is a weighted average price. The prices actually paid ranged from $1.72 to $1.89. 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 purchased at each price within the range for all transactions reported in this Form 4 utilizing an average weighted price. /s/ Nicholas J. Swenson 2012-10-03