WOLSFELD MATTHEW C (CIK 1258563) reported 2 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-07-02). Recent activity: Buy NTIC (11,879 shares), Sell NTIC (9,169 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-02 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP (NTIC) | CFO and Corporate Secretary | Buy | 11,879 | $79,589 |
| 2026-07-02 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP (NTIC) | CFO and Corporate Secretary | Sell | 9,169 | $79,587 |
Source: SEC Form 4 filings · as of 2026-07-02