9 insiders reported 33 Form 4 transactions for NORTHERN TECHNOLOGIES INTERNATIONAL CORP (NTIC) over the past 18 months (most recent 2026-09-09). Recent activity: Ramdas Gautam (President and CEO) Buy 43,805 shares, NIGON RICHARD (Director) Buy 7,426 shares, Lee Sunggyu (Director) Buy 6,188 shares, Calderon Nancy E. (Director) Buy 3 shares, Kemp Sarah E. (Director) Buy 6,188 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-09 | Ramdas Gautam | President and CEO | Buy | 43,805 | $0 |
| 2026-09-03 | NIGON RICHARD | Director | Buy | 7,426 | $0 |
| 2026-09-03 | Lee Sunggyu | Director | Buy | 6,188 | $0 |
| 2026-09-03 | Calderon Nancy E. | Director | Buy | 3 | $20 |
| 2026-09-03 | Kemp Sarah E. | Director | Buy | 6,188 | $0 |
| 2026-09-03 | Pinho Cristina Lucia Duarte | Director | Buy | 6,188 | $0 |
| 2026-09-03 | Calderon Nancy E. | Director | Buy | 3 | $22 |
| 2026-09-03 | Calderon Nancy E. | Director | Buy | 2 | $20 |
| 2026-09-03 | Calderon Nancy E. | Director | Buy | 3 | $22 |
| 2026-09-03 | Calderon Nancy E. | Director | Buy | 6,188 | $0 |
| 2026-07-31 | LYNCH G PATRICK | President and CEO | Sell | 16,070 | $128,507 |
| 2026-07-31 | LYNCH G PATRICK | President and CEO | Sell | 2 | $16 |
| 2026-07-31 | LYNCH G PATRICK | President and CEO | Buy | 16,072 | $107,682 |
| 2026-07-21 | NIGON RICHARD | Director | Buy | 12,000 | $80,400 |
| 2026-07-21 | NIGON RICHARD | Director | Sell | 12,000 | $96,048 |
| 2026-07-02 | WOLSFELD MATTHEW C | CFO and Corporate Secretary | Buy | 11,879 | $79,589 |
| 2026-07-02 | WOLSFELD MATTHEW C | CFO and Corporate Secretary | Sell | 9,169 | $79,587 |
| 2025-09-03 | Calderon Nancy E. | Director | Buy | 5 | $72 |
| 2025-09-03 | Calderon Nancy E. | Director | Buy | 3 | $22 |
| 2025-09-03 | Calderon Nancy E. | Director | Buy | 6 | $72 |
| 2025-09-03 | Calderon Nancy E. | Director | Buy | 14 | $152 |
| 2025-09-03 | Calderon Nancy E. | Director | Buy | 3 | $20 |
| 2025-09-03 | Calderon Nancy E. | Director | Buy | 3 | $22 |
| 2025-09-03 | Calderon Nancy E. | Director | Buy | 3 | $20 |
| 2025-09-03 | Calderon Nancy E. | Director | Buy | 11 | $151 |
Source: SEC Form 4 filings · as of 2026-09-09