| 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 | 03 Sep 2025 | 0001562252 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| holding | NTIC | Common Stock | 18,219 | 01 Sep 2025 | Direct |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | NTIC | Stock Option (right to buy) | Award | $0 | +16,287 | $0.000000 | 16,287 | 01 Sep 2025 | Common Stock | 16,287 | $7.42 | Direct |