Material Agreement (Form 8-K)

On December 18, 2025, Northern Technologies International Corporation ("NTIC") and JPMorgan Chase Bank, N.A. ("JPM") entered into a Note Modification Agreement pursuant to which NTIC and JPM modified that certain Line of Credit Note dated as of July 8, 2025 in the principal amount of $10.0 million issued by NTIC to JPM to change the maturity date from January 5, 2026 to February 5, 2027. All other material terms of the Line of Credit Note remain the same.

The foregoing represents only a summary of the material terms of the Note Modification Agreement, does not purport to be complete and is qualified in its entirety by reference to the complete text of the Note Modification Agreement, which is filed as Exhibit 10.1 to this Current Report on Form 8-K, and is incorporated by reference herein.