SEC Form 4 · Updated Daily
NTIC
— NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| LYNCH PHILIP M | Reporting Owner | 911,668 | 2006-07-25 | J |
| INTER ALIA HOLDING CO | 10%+ Owner | 602,284 | 2011-09-12 | S |
| Lynch Juliane I | Officer | 602,284 | 2011-09-12 | S |
| WOLSFELD MATTHEW C | Officer | 180,135 | 2026-07-01 | M |
| KUBIK DONALD A | Director | 132,286 | 2008-10-31 | A |
| LYNCH G PATRICK | Director | 121,356 | 2026-07-29 | M |
| Ramdas Gautam | Officer | 118,932.41 | 2026-09-04 | A |
| Narayan Ramani | Director | 106,763 | 2022-09-29 | M |
| Keong Koh Soo | Director | 101,095 | 2021-07-07 | M |
| NIGON RICHARD | Director | 54,574 | 2026-09-01 | A |
| Kemp Sarah E. | Director | 22,458.373 | 2026-09-01 | A |
| Calderon Nancy E. | Director | 20,939.544 | 2026-09-01 | A |
| von Falkenhausen Konstantin | Director | 18,219 | 2025-05-06 | P |
| Pinho Cristina Lucia Duarte | Director | 16,698 | 2026-09-01 | A |
| Lee Sunggyu | Director | 9,507 | 2026-09-01 | A |
| CHENU PIERRE | Director | 4,500 | 2013-11-26 | S |
| Mayers Mark M | Director | 2,000 | 2007-09-01 | A |
| Rosenbaum Barry | Director | 2,000 | 2007-09-01 | A |
| Kallmeyer Vera | Director | 2,000 | 2006-09-01 | A |
| Coulombe Jean-Guy | Director | 2,000 | 2006-09-01 | A |
| DALAL VINEET | Officer | 2,000 | 2006-07-25 | A |
| Haglund Brian James | Officer | 1,589.26 | 2026-09-04 | — |
| Colwell Barbara D. | Director | 1,500 | 2015-04-28 | P |
| STONE MARK J | Director | 0 | 2012-08-10 | S |
| Frank Tilman Bernhard | Director | 0 | 2008-05-02 | — |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-04 | Haglund Brian James | — | — | — | 1,589.26 |
| 2026-09-04 | Ramdas Gautam | — | — | — | 75,127.41 |
| 2026-09-04 | Ramdas Gautam | Grant / award (derivative) | 15,278 | $0.00 | 15,278 |
| 2026-09-04 | Ramdas Gautam | Grant / award | 43,805 | $0.00 | 118,932.41 |
| 2026-09-01 | LYNCH G PATRICK | Grant / award (derivative) | 40,257 | $0.00 | 40,257 |
| 2026-09-01 | Calderon Nancy E. | Grant / award | 6,188 | $0.00 | 20,939.544 |
| 2026-09-01 | Narayan Ramani | Grant / award (derivative) | 15,044 | $0.00 | 15,044 |
| 2026-09-01 | von Falkenhausen Konstantin | Grant / award (derivative) | 15,044 | $0.00 | 15,044 |
| 2026-09-01 | Pinho Cristina Lucia Duarte | Grant / award | 6,188 | $0.00 | 16,698 |
| 2026-09-01 | Kemp Sarah E. | Grant / award | 6,188 | $0.00 | 22,458.373 |
| 2026-09-01 | Lee Sunggyu | Grant / award | 6,188 | $0.00 | 9,507 |
| 2026-09-01 | NIGON RICHARD | Grant / award | 7,426 | $0.00 | 54,574 |
| 2026-09-01 | WOLSFELD MATTHEW C | Grant / award (derivative) | 29,755 | $0.00 | 29,755 |
| 2026-07-30 | LYNCH G PATRICK | Open-market sale | 16,070 | $8.00 | 105,284 |
| 2026-07-29 | LYNCH G PATRICK | Option exercise (derivative) | 16,072 | $0.00 | 0 |
| 2026-07-29 | LYNCH G PATRICK | Open-market sale | 2 | $8.10 | 121,354 |
| 2026-07-29 | LYNCH G PATRICK | Option exercise | 16,072 | $6.70 | 121,356 |
| 2026-07-20 | NIGON RICHARD | Option exercise (derivative) | 12,000 | $0.00 | 0 |
| 2026-07-20 | NIGON RICHARD | Open-market sale | 12,000 | $8.00 | 47,148 |
| 2026-07-20 | NIGON RICHARD | Option exercise | 12,000 | $6.70 | 59,148 |
| 2026-07-01 | WOLSFELD MATTHEW C | Option exercise (derivative) | 11,879 | $0.00 | 0 |
| 2026-07-01 | WOLSFELD MATTHEW C | Tax withholding | 9,169 | $8.68 | 170,966 |
| 2026-07-01 | WOLSFELD MATTHEW C | Option exercise | 11,879 | $6.70 | 180,135 |
| 2026-02-11 | Calderon Nancy E. | L | 2.533 | $8.66 | 14,751.544 |
| 2026-02-11 | Calderon Nancy E. | L | 2.365 | $8.66 | 14,749.011 |
| 2025-11-12 | Calderon Nancy E. | L | 2.698 | $8.12 | 14,746.646 |
| 2025-11-12 | Calderon Nancy E. | L | 2.521 | $8.12 | 14,743.948 |
| 2025-09-01 | Calderon Nancy E. | Grant / award | 6,739 | $0.00 | 14,741.427 |
| 2025-09-01 | Pinho Cristina Lucia Duarte | Grant / award | 6,739 | $0.00 | 10,510 |
| 2025-09-01 | Kemp Sarah E. | Grant / award | 6,739 | $0.00 | 16,270.373 |
| 2025-09-01 | NIGON RICHARD | Grant / award | 8,086 | $0.00 | 47,148 |
| 2025-09-01 | Narayan Ramani | Grant / award (derivative) | 16,287 | $0.00 | 16,287 |
| 2025-09-01 | Lee Sunggyu | Grant / award (derivative) | 16,287 | $0.00 | 16,287 |
| 2025-09-01 | von Falkenhausen Konstantin | Grant / award (derivative) | 16,287 | $0.00 | 16,287 |
| 2025-09-01 | LYNCH G PATRICK | Grant / award (derivative) | 44,051 | $0.00 | 44,051 |
| 2025-09-01 | WOLSFELD MATTHEW C | Grant / award (derivative) | 32,559 | $0.00 | 32,559 |
| 2025-08-13 | Calderon Nancy E. | L | 2.834 | $7.72 | 8,002.427 |
| 2025-08-13 | Calderon Nancy E. | L | 2.648 | $7.72 | 7,999.593 |
| 2025-07-24 | NIGON RICHARD | Option exercise (derivative) | 12,000 | $0.00 | 0 |
| 2025-07-24 | NIGON RICHARD | Tax withholding | 10,873 | $8.20 | 39,062 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.