Insider Transactions Reported by 10 Insiders of NORTHERN TECHNOLOGIES INTERNATIONAL CORP

Symbol
NTIC on Nasdaq
Location
Circle Pines, MN

Insiders trading volume in the past year

NORTHERN TECHNOLOGIES INTERNATIONAL CORP executives and other stock owners filed with the SEC include:

Name Relationship Holdings Value Past Year Net Change Change % Report Date
G. PATRICK LYNCH President and CEO, Director, 10%+ Owner $9,696,858 01 Sep 2025
MATTHEW C. WOLSFELD CFO and Corporate Secretary $1,246,776 01 Sep 2025
Ramani Narayan Director $791,113 01 Sep 2025
Koh Soo Keong Director $743,048 07 Jul 2021
RICHARD NIGON Director $349,366 01 Sep 2025
Konstantin von Falkenhausen Director $135,002 +$7,953 +6.3% 01 Sep 2025
Sarah E. Kemp Director $120,563 01 Sep 2025
Nancy E. Calderon Director $109,233 +$7,452 +7.3% 01 Sep 2025
Cristina Lucia Duarte Pinho Director $77,879 01 Sep 2025
Sunggyu Lee Director $24,593 01 Sep 2025

Recent Insider Transactions by Companies or Individuals for NORTHERN TECHNOLOGIES INTERNATIONAL CORP

Insider Symbol Class Transaction % Value $ * Price $ Shares Shares Owned Date Ownership
MATTHEW C. WOLSFELD NTIC Stock Option (right to buy) Award 32,559 32,559 01 Sep 2025 Direct
G. PATRICK LYNCH NTIC Stock Option (right to buy) Award 44,051 44,051 01 Sep 2025 Direct
Konstantin von Falkenhausen NTIC Stock Option (right to buy) Award 16,287 16,287 01 Sep 2025 Direct
Sunggyu Lee NTIC Stock Option (right to buy) Award 16,287 16,287 01 Sep 2025 Direct
Ramani Narayan NTIC Stock Option (right to buy) Award 16,287 16,287 01 Sep 2025 Direct
RICHARD NIGON NTIC Common Stock Award 20.7% 8,086 47,148 01 Sep 2025 Direct
Sarah E. Kemp NTIC Common Stock Award 70.7% 6,739 16,270 01 Sep 2025 Direct
Cristina Lucia Duarte Pinho NTIC Common Stock Award 178.7% 6,739 10,510 01 Sep 2025 Direct
Nancy E. Calderon NTIC Common Stock Award 84.2% 6,739 14,741 01 Sep 2025 Direct
Nancy E. Calderon NTIC Common Stock Small acquisition under Rule 16a-6 0.07% 5.48 8,002 13 Aug 2025 Direct
RICHARD NIGON NTIC Common Stock Tax liability -21.8% -10,873 39,062 24 Jul 2025 Direct
RICHARD NIGON NTIC Common Stock Options Exercise 31.6% 12,000 49,935 24 Jul 2025 Direct
RICHARD NIGON NTIC Stock Option (right to buy) Options Exercise -100% -12,000 0 24 Jul 2025 Direct
Nancy E. Calderon NTIC Common Stock Small acquisition under Rule 16a-6 0.07% 5.75 7,997 14 May 2025 Direct
Konstantin von Falkenhausen NTIC Common Stock Purchase 6.43% $7,953 $7.23 1,100 18,219 06 May 2025 Direct
Nancy E. Calderon NTIC Common Stock Purchase 14.4% $7,452 $7.45 1,000 7,954 25 Apr 2025 Direct
Nancy E. Calderon NTIC Common Stock Small acquisition under Rule 16a-6 0.25% 19.93 7,991 12 Feb 2025 Direct
Nancy E. Calderon NTIC Common Stock Small acquisition under Rule 16a-6 0.21% 16.8 7,971 13 Nov 2024 Direct
Konstantin von Falkenhausen NTIC Stock Option (right to buy) Award 9,843 9,843 01 Sep 2024 Direct
MATTHEW C. WOLSFELD NTIC Stock Option (right to buy) Award 33,156 33,156 01 Sep 2024 Direct
Cristina Lucia Duarte Pinho NTIC Common Stock Award 3,771 3,771 01 Sep 2024 Direct
Sunggyu Lee NTIC Stock Option (right to buy) Award 9,843 9,843 01 Sep 2024 Direct
Ramani Narayan NTIC Stock Option (right to buy) Award 9,843 9,843 01 Sep 2024 Direct
Nancy E. Calderon NTIC Common Stock Award 118.5% 3,771 6,954 01 Sep 2024 Direct
G. PATRICK LYNCH NTIC Stock Option (right to buy) Award 44,858 44,858 01 Sep 2024 Direct
RICHARD NIGON NTIC Stock Option (right to buy) Award 11,811 11,811 01 Sep 2024 Direct
Sarah E. Kemp NTIC Common Stock Award 65.5% 3,771 9,531 01 Sep 2024 Direct
G. PATRICK LYNCH NTIC Common Stock Tax liability -6.82% -7,710 105,284 26 Aug 2024 Direct
G. PATRICK LYNCH NTIC Common Stock Options Exercise 10.2% 10,488 112,994 26 Aug 2024 Direct
G. PATRICK LYNCH NTIC Stock Option (right to buy) Options Exercise -100% -10,488 0 26 Aug 2024 Direct
Nancy E. Calderon NTIC Common Stock Small acquisition under Rule 16a-6 0.54% 17.25 3,183 14 Aug 2024 Direct
RICHARD NIGON NTIC Common Stock Tax liability -16.8% -7,665 37,935 01 Aug 2024 Direct
RICHARD NIGON NTIC Common Stock Options Exercise 35.7% 12,000 45,600 01 Aug 2024 Direct
RICHARD NIGON NTIC Stock Option (right to buy) Options Exercise -100% -12,000 0 01 Aug 2024 Direct
Konstantin von Falkenhausen NTIC Common Stock Tax liability -26.2% -6,081 17,119 31 Jul 2024 Direct
Konstantin von Falkenhausen NTIC Common Stock Options Exercise 52.6% 8,000 23,200 31 Jul 2024 Direct
Konstantin von Falkenhausen NTIC Stock Option (right to buy) Options Exercise -100% -8,000 0 31 Jul 2024 Direct
Matthew C. Wolsfeld NTIC Common Stock Options Exercise 4.83% 7,752 168,149 15 Jul 2024 Direct
Matthew C. Wolsfeld NTIC Stock Option (right to buy) Options Exercise -100% -7,752 0 15 Jul 2024 Direct
Nancy E. Calderon NTIC Common Stock Small acquisition under Rule 16a-6 0.53% 16.62 3,166 15 May 2024 Direct
Sarah E. Kemp NTIC Common Stock Purchase 28.4% $20,018 $15.70 1,275 5,760 23 Apr 2024 Direct
Nancy E. Calderon NTIC Common Stock Small acquisition under Rule 16a-6 0.52% 16.27 3,150 14 Feb 2024 Direct
Nancy E. Calderon NTIC Common Stock Small acquisition under Rule 16a-6 0.55% 17.06 3,133 16 Nov 2023 Direct
Cristina Lucia Duarte Pinho NTIC Stock Option (right to buy) Award 9,921 9,921 01 Sep 2023 Direct
Sarah E. Kemp NTIC Stock Option (right to buy) Award 9,921 9,921 01 Sep 2023 Direct
Nancy E. Calderon NTIC Stock Option (right to buy) Award 9,921 9,921 01 Sep 2023 Direct
Konstantin von Falkenhausen NTIC Stock Option (right to buy) Award 9,921 9,921 01 Sep 2023 Direct
Ramani Narayan NTIC Stock Option (right to buy) Award 9,921 9,921 01 Sep 2023 Direct
Sunggyu Lee NTIC Stock Option (right to buy) Award 9,921 9,921 01 Sep 2023 Direct
Matthew C Wolsfeld NTIC Stock Option (right to buy) Award 33,543 33,543 01 Sep 2023 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.