X0508 4 2026-03-11 0000080172 NATIONAL PRESTO INDUSTRIES INC NPK 0001229255 LIEBLE RANDY F 3925 N HASTINGS WAY EAU CLAIRE WI 54703 1 1 Common stock $1.00 par value 2026-03-11 4 S 0 2417 143.97 D 5222 D Common stock $1.00 par value 599 I Lieble Family Trust DTD 7/19/2018 Common stock $1.00 par value 978 I IRA The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 10, 2025. /s/ Ann Werner by Power of Attorney 2026-03-11