Matthew C. Wolsfeld

Companies

• NORTHERN TECHNOLOGIES INTERNATIONAL CORPChief financial officer Jul 27, 2006 to now¹

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• NTNORTHERN TECHNOLOGIES INTERNATIONAL CORP NTIC170,966 shares²$1.3M at $7.70Sep 3, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Jul 1, 2026Shares withheld for tax 9,169 shares at $8.68 of NORTHERN TECHNOLOGIES INTERNATIONAL CORP³
• Jul 1, 2026Exercised options 11,879 shares at $6.70 of NORTHERN TECHNOLOGIES INTERNATIONAL CORP³
• Jul 15, 2024Exercised options 7,752 shares at $10.05 of NORTHERN TECHNOLOGIES INTERNATIONAL CORP⁴
• Jul 11, 2023Exercised options 8,582 shares at $7.35 of NORTHERN TECHNOLOGIES INTERNATIONAL CORP⁵
• Oct 4, 2022Shares withheld for tax 10,086 shares at $13.83 of NORTHERN TECHNOLOGIES INTERNATIONAL CORP⁶
• Oct 4, 2022Exercised options 27,218 shares at $5.13 of NORTHERN TECHNOLOGIES INTERNATIONAL CORP⁶