X0303 4 2010-05-18 0 0000080172 NATIONAL PRESTO INDUSTRIES INC NPK 0001229197 COHEN MARYJO R 3925 N HASTINGS WAY EAU CLAIRE WI 54703 1 1 1 0 Chair of Board,President,CEO Common stock $1.00 par value 2010-05-18 4 A 0 915 0 A 331867 D Common stock $1.00 par value 2327 I 401(k) Plan Common stock $1.00 par value 1338712 I Voting trust Restricted stock award will vest on March 15, 2015 These shares represented by voting trust certificates issued under the Voting Trust Agreement dated December 4, 1989, of which reporting person is the trustee. The filing of this report shall not be construed as an admission by Ms. Cohen that, for the purpose of Section 16 of the Securities and Exchange Act of 1934, she is the beneficial owner of any securities referred to under the category of indirect ownership in this report or any prior report and any such beneficial ownership is expressly disclaimed. Norma L Jaenke 2010-05-19