X0609 4 2026-09-09 0 0000788920 PRO DEX INC PDEX 0001431777 Charlton Alisha false C/O 2361 MCGAW AVENUE IRVINE CA 92614 0 1 0 0 Chief Financial Officer 0 Common Stock 2026-09-09 4 S 0 1500 61.05 D 22670 D Common Stock 2026-09-09 4 S 0 800 61.76 D 21870 D The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $60.59 to $61.41, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form. The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $61.674 to $61.92, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (2) to this Form. /s/ Alisha Charlton 2026-09-10