| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| von Falkenhausen Konstantin | Director | C/O NORTHERN TECHNOLOGIES INT'L CORP., 4201 WOODLAND ROAD, PO BOX 69, CIRCLE PINES | /s/Matthew C Wolsfeld Attorney-in-fact | 06 May 2025 | 0001562252 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | NTIC | Common Stock | Purchase | $7,953 | +1,100 | +6.4% | $7.23 | 18,219 | 06 May 2025 | Direct |