| 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 | 2025-05-06 | 0001562252 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | NTIC | Common Stock | Purchase | $7.95K | +1.1K | +6.43% | $7.23 | 18.2K | May 6, 2025 | Direct |