X0303 4 2011-03-02 0 0000875582 NORTHERN TECHNOLOGIES INTERNATIONAL CORP ntic 0000928321 INTER ALIA HOLDING CO 0 0 1 0 0001451176 Lynch Juliane I 23205 MERCANTILE ROAD BEACHWOOD OH 44122 0 1 0 0 President Common Stock 2011-03-02 4 S 0 1000 16 D 615668 D Common Stock 2011-03-03 4 S 0 2500 15.96 D 613168 D Common Stock 2011-03-04 4 S 0 1500 16 D 611668 D These shares were sold pursuant to a 10b5-1(c) sales plan effective May 25, 2010. These shares are held directly by Inter Alia Holding Company. Juliane I. Lynch, President of Inter Alia Holding Company, does not hold any shares directly. Mrs. J. I. Lynch disclaims beneficial ownership of the shares held by Inter Alia Holding Company, except to the extent of her pecuniary interest therein. /s/ G. Patrick Lynch - Officer 2011-03-07