David W. Heinzmann
President & CEO at Littelfuse Inc.
Sits on 2 boards. Last updated September 28, 2026
Time on boards
- Boards served
- 2
- Current seats
- 2
- Board service
- 7 years
- Director since
- 2023
7 years of board service in total across 2 boards, counting each seat separately. Longest: Littelfuse Inc., 3 years.
Chief executive roles
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
-
Gentherm Inc May 8, 202599.0%
-
Littelfuse Inc. April 25, 202497.0%
-
Littelfuse Inc. April 27, 202397.5%
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| May 14, 2026 | Gentherm Inc | Grant or award | +4,292 | — | — |
| May 8, 2025 | Gentherm Inc | Grant or award | +5,075 | — | — |
| Aug 26, 2024 | Littelfuse Inc. | Option exercise | +2,091 | $192.59 | $402,706 |
| Aug 26, 2024 | Littelfuse Inc. | Open-market sale | −749 | $273.93 | $205,174 |
| Aug 26, 2024 | Littelfuse Inc. | Open-market sale | −1,342 | $275.05 | $369,117 |
| Aug 23, 2024 | Littelfuse Inc. | Option exercise | +8,715 | $192.59 | $1,678,422 |
| Aug 23, 2024 | Littelfuse Inc. | Open-market sale | −2,382 | $273.59 | $651,691 |
| Aug 23, 2024 | Littelfuse Inc. | Open-market sale | −5,913 | $274.67 | $1,624,124 |
| Aug 23, 2024 | Littelfuse Inc. | Open-market sale | −420 | $275.24 | $115,601 |
| Jul 31, 2024 | Littelfuse Inc. | Option exercise | +3,786 | $192.59 | $729,146 |
| Jul 31, 2024 | Littelfuse Inc. | Open-market sale | −3,048 | $273.80 | $834,542 |
| Jul 31, 2024 | Littelfuse Inc. | Open-market sale | −738 | $274.44 | $202,537 |
| Jul 18, 2024 | Littelfuse Inc. | Option exercise | +11 | $192.59 | $2,118 |
| Jul 18, 2024 | Littelfuse Inc. | Open-market sale | −11 | $273.00 | $3,003 |
| Jul 17, 2024 | Littelfuse Inc. | Option exercise | +300 | $192.59 | $57,777 |
Questions about David W. Heinzmann
What boards is David W. Heinzmann on?
David W. Heinzmann sits on the boards of Gentherm Inc and Littelfuse Inc.
What company is David W. Heinzmann the CEO of?
David W. Heinzmann is President & CEO of Littelfuse Inc.
How long has David W. Heinzmann served on boards?
Our records show at least 7 years of board service across 2 boards, the earliest from 2023.
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