NTIC insider filings
NORTHERN TECHNOLOGIES INTERNATIONAL CORP — 50 most recent insider filings (SEC Forms 3/4/5) from EDGAR, normalized by FilingPulse. Latest filing: 2026-09-09. Screen NTIC transaction legs live →
Insider transaction summary — last 90 days
2026-07-10 to 2026-10-08, from the filings listed below: 12 insider filings (Forms 3/4/5). Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 3 legs across 2 filings by 2 insiders — 28,072 shares, $224,571 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 19.
- Largest priced transaction: sale of 16,070 shares @ $8.00 ($128,507) by LYNCH G PATRICK, filed 2026-07-31.
By insider — same window
Open-market purchase/sale legs on non-derivative securities, grouped by the filing's reporting owner(s); joint filings appear once. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Insider | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|
| LYNCH G PATRICK — President and CEO, Director, 10% owner | 2 | — | 2 legs · 16,072 sh · $128,523 | 3 |
| NIGON RICHARD — Director | 2 | — | 1 leg · 12,000 sh · $96,048 | 3 |
| Calderon Nancy E. — Director | 1 | — | — | 5 |
| Ramdas Gautam — President and CEO | 1 | — | — | 2 |
| Kemp Sarah E. — Director | 1 | — | — | 1 |
| Lee Sunggyu — Director | 1 | — | — | 1 |
| Narayan Ramani — Director | 1 | — | — | 1 |
| Pinho Cristina Lucia Duarte — Director | 1 | — | — | 1 |
| WOLSFELD MATTHEW C — CFO and Corporate Secretary | 1 | — | — | 1 |
| von Falkenhausen Konstantin — Director | 1 | — | — | 1 |
Recent insider filings — NORTHERN TECHNOLOGIES INTERNATIONAL CORP
| Filed | Form | Insider | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-09 | 4 | Ramdas Gautam — President and CEO | Grant/award (A): 43,805 @ $0 · Grant/award (A): 15,278 (derivative) @ $0 | EDGAR |
| 2026-09-04 | 4 | LYNCH G PATRICK — President and CEO, Director, 10% owner | Grant/award (A): 40,257 (derivative) @ $0 | EDGAR |
| 2026-09-03 | 4 | von Falkenhausen Konstantin — Director | Grant/award (A): 15,044 (derivative) @ $0 | EDGAR |
| 2026-09-03 | 4 | NIGON RICHARD — Director | Grant/award (A): 7,426 @ $0 | EDGAR |
| 2026-09-03 | 4 | WOLSFELD MATTHEW C — CFO and Corporate Secretary | Grant/award (A): 29,755 (derivative) @ $0 | EDGAR |
| 2026-09-03 | 4 | Pinho Cristina Lucia Duarte — Director | Grant/award (A): 6,188 @ $0 | EDGAR |
| 2026-09-03 | 4 | Lee Sunggyu — Director | Grant/award (A): 6,188 @ $0 | EDGAR |
| 2026-09-03 | 4 | Kemp Sarah E. — Director | Grant/award (A): 6,188 @ $0 | EDGAR |
| 2026-09-03 | 4 | Narayan Ramani — Director | Grant/award (A): 15,044 (derivative) @ $0 | EDGAR |
| 2026-09-03 | 4 | Calderon Nancy E. — Director | Code (L): 2.52 @ $8.12 · Code (L): 2.70 @ $8.12 · Code (L): 2.37 @ $8.66 · Code (L): 2.53 @ $8.66 · Grant/award (A): 6,188 @ $0 | EDGAR |
| 2026-07-31 | 4 | LYNCH G PATRICK — President and CEO, Director, 10% owner | Option exercise (M): 16,072 @ $6.70 · Sale (S): 2 @ $8.10 · Sale (S): 16,070 @ $8.00 · Option exercise (M): 16,072 (derivative) @ $0 | EDGAR |
| 2026-07-21 | 4 | NIGON RICHARD — Director | Option exercise (M): 12,000 @ $6.70 · Sale (S): 12,000 @ $8.00 · Option exercise (M): 12,000 (derivative) @ $0 | EDGAR |
| 2026-07-02 | 4 | WOLSFELD MATTHEW C — CFO and Corporate Secretary | Option exercise (M): 11,879 @ $6.70 · Tax withholding (F): 9,169 @ $8.68 · Option exercise (M): 11,879 (derivative) @ $0 | EDGAR |
| 2025-09-03 | 4 | Pinho Cristina Lucia Duarte — Director | Grant/award (A): 6,739 @ $0 | EDGAR |
| 2025-09-03 | 4 | Kemp Sarah E. — Director | Grant/award (A): 6,739 @ $0 | EDGAR |
| 2025-09-03 | 4 | Calderon Nancy E. — Director | Code (L): 5.42 @ $13.29 · Code (L): 11.38 @ $13.29 · Code (L): 6.43 @ $11.26 · Code (L): 13.50 @ $11.26 · Code (L): 2.78 @ $7.35 · Code (L): 2.97 @ $7.35 · +3 more | EDGAR |
| 2025-09-03 | 4 | von Falkenhausen Konstantin — Director | Grant/award (A): 16,287 (derivative) @ $0 | EDGAR |
| 2025-09-03 | 4 | Narayan Ramani — Director | Grant/award (A): 16,287 (derivative) @ $0 | EDGAR |
| 2025-09-03 | 4 | Lee Sunggyu — Director | Grant/award (A): 16,287 (derivative) @ $0 | EDGAR |
| 2025-09-03 | 4 | WOLSFELD MATTHEW C — CFO and Corporate Secretary | Grant/award (A): 32,559 (derivative) @ $0 | EDGAR |
| 2025-09-03 | 4 | LYNCH G PATRICK — President and CEO, Director, 10% owner | Grant/award (A): 44,051 (derivative) @ $0 | EDGAR |
| 2025-09-03 | 4 | NIGON RICHARD — Director | Grant/award (A): 8,086 @ $0 | EDGAR |
| 2025-07-28 | 4 | NIGON RICHARD — Director | Option exercise (M): 12,000 @ $7.43 · Tax withholding (F): 10,873 @ $8.20 · Option exercise (M): 12,000 (derivative) @ $0 | EDGAR |
| 2025-05-06 | 4 | von Falkenhausen Konstantin — Director | Purchase (P): 1,100 @ $7.23 | EDGAR |
| 2025-04-28 | 4 | Calderon Nancy E. — Director | Purchase (P): 1,000 @ $7.45 | EDGAR |
| 2024-09-04 | 4 | Pinho Cristina Lucia Duarte — Director | Grant/award (A): 3,771 @ $0 | EDGAR |
| 2024-09-04 | 4 | Kemp Sarah E. — Director | Grant/award (A): 3,771 @ $0 | EDGAR |
| 2024-09-04 | 4 | Calderon Nancy E. — Director | Code (L): 5.88 @ $12.01 · Code (L): 11.18 @ $13.25 · Code (L): 5.21 @ $13.63 · Code (L): 11.06 @ $13.47 · Code (L): 3.96 @ $18.04 · Code (L): 12.66 @ $11.83 · +3 more | EDGAR |
| 2024-09-04 | 4 | von Falkenhausen Konstantin — Director | Grant/award (A): 9,843 (derivative) @ $0 | EDGAR |
| 2024-09-04 | 4 | Narayan Ramani — Director | Grant/award (A): 9,843 (derivative) @ $0 | EDGAR |
| 2024-09-04 | 4 | Lee Sunggyu — Director | Grant/award (A): 9,843 (derivative) @ $0 | EDGAR |
| 2024-09-04 | 4 | WOLSFELD MATTHEW C — CFO and Corporate Secretary | Grant/award (A): 33,156 (derivative) @ $0 | EDGAR |
| 2024-09-04 | 4 | LYNCH G PATRICK — President & CEO, Director, 10% owner | Grant/award (A): 44,858 (derivative) @ $0 | EDGAR |
| 2024-09-04 | 4 | NIGON RICHARD — Director | Grant/award (A): 11,811 (derivative) @ $0 | EDGAR |
| 2024-08-29 | 4 | LYNCH G PATRICK — President and CEO, Director, 10% owner | Option exercise (M): 10,488 @ $10.05 · Tax withholding (F): 7,710 @ $13.67 · Option exercise (M): 10,488 (derivative) @ $0 | EDGAR |
| 2024-08-02 | 4 | NIGON RICHARD — Director | Option exercise (M): 12,000 @ $10.05 · Tax withholding (F): 7,665 @ $13.11 · Option exercise (M): 12,000 (derivative) @ $0 | EDGAR |
| 2024-08-01 | 4 | von Falkenhausen Konstantin — Director | Option exercise (M): 8,000 @ $10.05 · Tax withholding (F): 6,081 @ $13.22 · Option exercise (M): 8,000 (derivative) @ $0 | EDGAR |
| 2024-07-17 | 4 | WOLSFELD MATTHEW C — CFO and Corporate Secretary | Option exercise (M): 7,752 @ $10.05 · Option exercise (M): 7,752 (derivative) @ $0 | EDGAR |
| 2024-04-24 | 4 | Kemp Sarah E. — Director | Purchase (P): 1,275 @ $15.70 | EDGAR |
| 2023-09-06 | 4 | Pinho Cristina Lucia Duarte — Director | Grant/award (A): 9,921 (derivative) @ $0 | EDGAR |
| 2023-09-06 | 4 | Kemp Sarah E. — Director | Grant/award (A): 9,921 (derivative) @ $0 | EDGAR |
| 2023-09-06 | 4 | Calderon Nancy E. — Director | Code (L): 11.18 @ $12.96 · Code (L): 13.72 @ $13.17 · Code (L): 15.71 @ $11.56 · Code (L): 13.98 @ $13.07 · Grant/award (A): 9,921 (derivative) @ $0 | EDGAR |
| 2023-09-06 | 4 | von Falkenhausen Konstantin — Director | Grant/award (A): 9,921 (derivative) @ $0 | EDGAR |
| 2023-09-06 | 4 | Narayan Ramani — Director | Grant/award (A): 9,921 (derivative) @ $0 | EDGAR |
| 2023-09-06 | 4 | Lee Sunggyu — Director | Grant/award (A): 9,921 (derivative) @ $0 | EDGAR |
| 2023-09-06 | 4 | WOLSFELD MATTHEW C — CFO and Corporate Secretary | Grant/award (A): 33,543 (derivative) @ $0 | EDGAR |
| 2023-09-06 | 4 | LYNCH G PATRICK — President & CEO, Director | Grant/award (A): 45,381 (derivative) @ $0 | EDGAR |
| 2023-09-06 | 4 | NIGON RICHARD — Director | Grant/award (A): 11,905 (derivative) @ $0 | EDGAR |
| 2023-08-28 | 4 | von Falkenhausen Konstantin — Director | Option exercise (M): 8,000 @ $7.35 · Option exercise (M): 8,000 (derivative) @ $0 | EDGAR |
| 2023-08-21 | 4 | Lee Sunggyu — Director | Option exercise (M): 8,000 @ $7.35 · Tax withholding (F): 4,681 @ $12.56 · Option exercise (M): 8,000 (derivative) @ $0 | EDGAR |
Recent 8-K events — NORTHERN TECHNOLOGIES INTERNATIONAL CORP
| Filed | Form | Items reported | Source |
|---|---|---|---|
| 2026-09-22 | 8-K | 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers | EDGAR |
| 2026-09-08 | 8-K | 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-07-09 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-04-24 | 8-K | 8.01 — Other Events | EDGAR |
| 2026-04-09 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-01-16 | 8-K | 5.07 — Submission of Matters to a Vote of Security Holders | EDGAR |
| 2026-01-08 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-12-19 | 8-K | 1.01 — Entry into a Material Definitive Agreement 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-11-18 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-07-11 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
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