David W. Heinzmann

Companies

• Gentherm IncorporatedBoard member Aug 13, 2020 to now¹
• LittelfuseBoard member Jan 4, 2017 to Aug 27, 2024²
• LittelfuseChief executive officer Jan 4, 2017 to Aug 27, 2024²
• LittelfusePresident Jan 4, 2017 to Aug 27, 2024²
• LittelfuseChief operating officer Jan 13, 2014 to Sep 1, 2016³
• Pulse ElectronicsBoard member Jun 16, 2014 to Jun 17, 2014⁴
• LittelfuseV.P. and G.M. Automotive Div. Mar 15, 2006 to Nov 20, 2013⁵

Holdings

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

Shares held

• Littelfuse LFUS59,654 shares⁶$22.9M at $384.26Aug 26, 2024
• Gentherm Incorporated THRM21,365 shares⁷$610.7K at $28.59May 14, 2026

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

Recent filings

• May 14, 2026Granted 4,292 shares of Gentherm Incorporated⁷
• May 8, 2025Granted 5,075 shares of Gentherm Incorporated⁸
• Aug 26, 2024Sold 1,342 shares at $275.05 of Littelfuse⁶
• Aug 26, 2024Sold 749 shares at $273.93 of Littelfuse⁶
• Aug 26, 2024Exercised options 2,091 shares at $192.59 of Littelfuse⁶
• Aug 23, 2024Sold 420 shares at $275.24 of Littelfuse⁹
• Aug 23, 2024Sold 5,913 shares at $274.67 of Littelfuse⁹
• Aug 23, 2024Sold 2,382 shares at $273.59 of Littelfuse⁹
• Aug 23, 2024Exercised options 8,715 shares at $192.59 of Littelfuse⁹
• Jul 31, 2024Sold 738 shares at $274.44 of Littelfuse¹⁰
• Jul 31, 2024Sold 3,048 shares at $273.80 of Littelfuse¹⁰
• Jul 31, 2024Exercised options 3,786 shares at $192.59 of Littelfuse¹⁰
• Jul 18, 2024Sold 11 shares at $273.00 of Littelfuse¹¹
• Jul 18, 2024Exercised options 11 shares at $192.59 of Littelfuse¹¹
• Jul 17, 2024Sold 300 shares at $273.17 of Littelfuse¹²
• Jul 17, 2024Exercised options 300 shares at $192.59 of Littelfuse¹²
• Jul 16, 2024Sold 819 shares at $275.29 of Littelfuse¹²
• Jul 16, 2024Sold 4,784 shares at $274.79 of Littelfuse¹²
• Jul 16, 2024Sold 2,555 shares at $273.42 of Littelfuse¹²
• Jul 16, 2024Exercised options 8,158 shares at $192.59 of Littelfuse¹²
• May 16, 2024Granted 2,662 shares of Gentherm Incorporated¹³
• Apr 28, 2024Shares withheld for tax 1,273 shares at $231.64 of Littelfuse¹⁴
• Apr 27, 2024Shares withheld for tax 1,434 shares at $231.64 of Littelfuse¹⁴
• Apr 25, 2024Granted 10,917 shares of Littelfuse¹⁵
• Apr 22, 2024Shares withheld for tax 712 shares at $228.84 of Littelfuse¹⁶