Company · CIK 0000875582 · SIC 3470 — Coating, Engraving & Allied Services · Nasdaq
NORTHERN TECHNOLOGIES INTERNATIONAL CORP · NTIC
Insider activity reported against this company. All insider holders · On EDGAR ↗
Reported at this company — common stock
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 4, 2026 AForm 4 → | Sep 9, 9:36 pm EDT | Gautam RamdasPresident and CEO | 43,805 | — | — | 118,932 | — | |
| Sep 1, 2026 AForm 4 → | Sep 3, 4:26 pm EDT | Richard NigonDirector | 7,426 | — | — | 54,574 | — | |
| Sep 1, 2026 AForm 4 → | Sep 3, 4:23 pm EDT | Sunggyu LeeDirector | 6,188 | — | — | 9,507 | — | |
| Sep 1, 2026 AForm 4 → | Sep 3, 4:19 pm EDT | Sarah E. KempDirector | 6,188 | — | — | 22,458 | — | |
| Sep 1, 2026 AForm 4 → | Sep 3, 4:14 pm EDT | Cristina Lucia Duarte PinhoDirector | 6,188 | — | — | 16,698 | — | |
| Jul 29, 2026 SForm 4 → | Jul 31, 4:34 pm EDT | G Patrick LynchPresident and CEO, Director, 10% Owner | 16,072 | $8.00 | $128,523 | 105,284 | −13.2% | |
| Jul 29, 2026 MForm 4 → | Jul 31, 4:34 pm EDT | G Patrick LynchPresident and CEO, Director, 10% Owner | 16,072 | $6.70 | $107,682 | 121,356 | — | |
| Jul 20, 2026 SForm 4 → | Jul 21, 4:28 pm EDT | Richard NigonDirector | 12,000 | $8.00 | $96,048 | 47,148 | −20.3% | |
| Jul 20, 2026 MForm 4 → | Jul 21, 4:28 pm EDT | Richard NigonDirector | 12,000 | $6.70 | $80,400 | 59,148 | — | |
| Jul 1, 2026 FMForm 4 → | Jul 2, 4:44 pm EDT | Matthew C WolsfeldCFO and Corporate Secretary | 21,048 | $7.56 | $159,176 | 170,966 | — | |
| Nov 12, 2025 ALForm 4 → | Sep 3, 2026, 4:01 pm EDT | Nancy E. CalderonDirector | 6,198 | $8.38 | $85 | 20,940 | — | late |
| Sep 7, 2017 MForm 4 → | Sep 8, 5:33 pm EDT | Richard NigonDirector | 1,500 | $10.25 | $15,375 | 15,300 | — | plan? |
| Aug 31, 2017 MForm 4 → | Sep 5, 5:18 pm EDT | Ramani NarayanDirector | 4,000 | $10.25 | $41,000 | 19,500 | — | plan? |
| Aug 23, 2017 MForm 4 → | Aug 24, 4:50 pm EDT | Koh Soo KeongDirector | 4,000 | $10.25 | $41,000 | 16,666 | — | plan? |
| Apr 27, 2017 MForm 4 → | May 1, 4:17 pm EDT | Richard NigonDirector | 4,000 | $10.25 | $41,000 | 13,800 | — | plan? |
| Aug 17, 2015 MForm 4 → | Aug 18, 4:43 pm EDT | Ramani NarayanDirector | 4,000 | $9.76 | $39,040 | 15,500 | — | plan? |
| Aug 17, 2015 FMForm 4 → | Aug 18, 4:31 pm EDT | Richard NigonDirector | 6,477 | $12.05 | $78,078 | 9,800 | — | plan? |
| Jul 24, 2015 PForm 4 → | Jul 28, 4:25 pm EDT | Konstantin von FalkenhausenDirector | 600 | $17.02 | $10,212 | 600 | — | plan? |
| Jul 3, 2015 MForm 4 → | Jul 6, 4:32 pm EDT | Koh Soo KeongDirector | 4,000 | $9.76 | $39,040 | 12,666 | — | plan? |
| Apr 28, 2015 PForm 4 → | Apr 29, 4:29 pm EDT | Barbara D. ColwellDirector | 1,000 | $17.38 | $17,379 | 1,500 | +200% | plan? |
| Jan 15, 2015 FMForm 4 → | Jan 16, 4:55 pm EST | Richard NigonDirector | 3,389 | $14.04 | $47,588 | 8,277 | — | plan? |
Reported at this company — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 4, 2026 AForm 4 → | Sep 9, 9:36 pm EDT | Gautam RamdasPresident and CEO | 15,278 | — | — | 15,278 | — | |
| Sep 1, 2026 AForm 4 → | Sep 4, 7:54 am EDT | G Patrick LynchPresident and CEO, Director, 10% Owner | 40,257 | — | — | 40,257 | — | late |
| Sep 1, 2026 AForm 4 → | Sep 3, 9:58 pm EDT | Matthew C WolsfeldCFO and Corporate Secretary | 29,755 | — | — | 29,755 | — | |
| Sep 1, 2026 AForm 4 → | Sep 3, 4:10 pm EDT | Konstantin von FalkenhausenDirector | 15,044 | — | — | 15,044 | — | |
| Sep 1, 2026 AForm 4 → | Sep 3, 4:07 pm EDT | Ramani NarayanDirector | 15,044 | — | — | 15,044 | — | |
| Jul 29, 2026 MForm 4 → | Jul 31, 4:34 pm EDT | G Patrick LynchPresident and CEO, Director, 10% Owner | 16,072 | — | — | 0 | — | |
| Jul 20, 2026 MForm 4 → | Jul 21, 4:28 pm EDT | Richard NigonDirector | 12,000 | — | — | 0 | — | |
| Jul 1, 2026 MForm 4 → | Jul 2, 4:44 pm EDT | Matthew C WolsfeldCFO and Corporate Secretary | 11,879 | — | — | 0 | — | |
| Sep 1, 2018 AForm 4 → | Sep 5, 5:32 pm EDT | Matthew C WolsfeldCFO and Corporate Secretary | 10,198 | — | — | 10,198 | — | |
| Sep 1, 2018 AForm 4 → | Sep 5, 5:23 pm EDT | G Patrick LynchPresident and CEO, Director, 10% Owner | 13,798 | — | — | 13,798 | — | |
| Sep 1, 2018 AForm 4 → | Sep 5, 5:12 pm EDT | Barbara D. ColwellDirector | 2,773 | — | — | 2,773 | — | |
| Sep 1, 2018 AForm 4 → | Sep 5, 5:05 pm EDT | Konstantin von FalkenhausenDirector | 2,773 | — | — | 2,773 | — | |
| Sep 1, 2018 AForm 4 → | Sep 5, 4:56 pm EDT | Ramani NarayanDirector | 2,773 | — | — | 2,773 | — | |
| Sep 1, 2018 AForm 4 → | Sep 5, 4:47 pm EDT | Koh Soo KeongDirector | 2,773 | — | — | 2,773 | — | |
| Sep 1, 2018 AForm 4 → | Sep 5, 4:35 pm EDT | Richard NigonDirector | 3,328 | — | — | 3,328 | — | |
| Sep 7, 2017 MForm 4 → | Sep 8, 5:33 pm EDT | Richard NigonDirector | 1,500 | $10.25 | $15,375 | 0 | — | |
| Sep 1, 2017 AForm 4 → | Sep 5, 5:49 pm EDT | Matthew C WolsfeldCFO and Corporate Secretary | 4,325 | — | — | 4,325 | — | |
| Sep 1, 2017 AForm 4 → | Sep 5, 5:37 pm EDT | G Patrick LynchPresident and CEO, Director, 10% Owner | 5,852 | — | — | 5,852 | — | |
| Sep 1, 2017 AForm 4 → | Sep 5, 5:06 pm EDT | Koh Soo KeongDirector | 4,000 | — | — | 4,000 | — | |
| Sep 1, 2017 AForm 4 → | Sep 5, 4:58 pm EDT | Richard NigonDirector | 6,000 | — | — | 4,000 | — | |
| Sep 1, 2017 AForm 4 → | Sep 5, 4:44 pm EDT | Barbara D. ColwellDirector | 4,000 | — | — | 4,000 | — | |
| Sep 1, 2017 AForm 4 → | Sep 5, 4:35 pm EDT | Konstantin von FalkenhausenDirector | 4,000 | — | — | 4,000 | — | |
| Aug 31, 2017 AMForm 4 → | Sep 5, 5:18 pm EDT | Ramani NarayanDirector | 8,000 | $10.25 | $41,000 | 4,000 | — | |
| Aug 23, 2017 MForm 4 → | Aug 24, 4:50 pm EDT | Koh Soo KeongDirector | 4,000 | $10.25 | $41,000 | 0 | — | |
| Apr 27, 2017 MForm 4 → | May 1, 4:17 pm EDT | Richard NigonDirector | 4,000 | $10.25 | $41,000 | 0 | — | |
| Sep 1, 2016 AForm 4 → | Sep 6, 5:44 pm EDT | Matthew C WolsfeldCFO and Corporate Secretary | 5,940 | — | — | 5,940 | — | |
| Sep 1, 2016 AForm 4 → | Sep 6, 5:32 pm EDT | G Patrick LynchPresident and CEO, Director, 10% Owner | 8,036 | — | — | 8,036 | — | |
| Sep 1, 2016 AForm 4 → | Sep 6, 5:16 pm EDT | Barbara D. ColwellDirector | 4,000 | — | — | 4,000 | — | |
| Sep 1, 2016 AForm 4 → | Sep 6, 5:09 pm EDT | Konstantin von FalkenhausenDirector | 4,000 | — | — | 4,000 | — | |
| Sep 1, 2016 AForm 4 → | Sep 6, 4:53 pm EDT | Ramani NarayanDirector | 4,000 | — | — | 4,000 | — | |
| Sep 1, 2016 AForm 4 → | Sep 6, 4:43 pm EDT | Koh Soo KeongDirector | 4,000 | — | — | 4,000 | — | |
| Sep 1, 2016 AForm 4 → | Sep 6, 4:34 pm EDT | Richard NigonDirector | 6,000 | — | — | 4,000 | — | |
| Sep 1, 2015 AForm 4 → | Sep 3, 5:50 pm EDT | Matthew C WolsfeldCFO and Corporate Secretary | 5,386 | — | — | 5,386 | — | |
| Sep 1, 2015 AForm 4 → | Sep 3, 5:37 pm EDT | G Patrick LynchPresident and CEO, Director, 10% Owner | 7,287 | — | — | 7,287 | — | |
| Sep 1, 2015 AForm 4 → | Sep 3, 5:24 pm EDT | Barbara D. ColwellDirector | 4,000 | — | — | 4,000 | — | |
| Sep 1, 2015 AForm 4 → | Sep 3, 5:17 pm EDT | Konstantin von FalkenhausenDirector | 4,000 | — | — | 4,000 | — | |
| Sep 1, 2015 AForm 4 → | Sep 3, 5:07 pm EDT | Ramani NarayanDirector | 4,000 | — | — | 4,000 | — | |
| Sep 1, 2015 AForm 4 → | Sep 3, 5:00 pm EDT | Koh Soo KeongDirector | 4,000 | — | — | 4,000 | — | |
| Sep 1, 2015 AForm 4 → | Sep 3, 4:51 pm EDT | Richard NigonDirector | 6,000 | — | — | 4,000 | — | |
| Aug 17, 2015 MForm 4 → | Aug 18, 4:43 pm EDT | Ramani NarayanDirector | 4,000 | $9.76 | $39,040 | 0 | — | |
| Aug 17, 2015 MForm 4 → | Aug 18, 4:31 pm EDT | Richard NigonDirector | 4,000 | $9.76 | $39,040 | 0 | — | |
| Jul 3, 2015 MForm 4 → | Jul 6, 4:32 pm EDT | Koh Soo KeongDirector | 4,000 | $9.76 | $39,040 | 0 | — | |
| Jan 15, 2015 MForm 4 → | Jan 16, 4:55 pm EST | Richard NigonDirector | 2,333 | — | — | 0 | — |