Quick Takeaways
- David W. Heinzmann has 2 issuer positions tracked on this page.
- Estimated disclosed ownership value: $16,864,365.
- Recent insider filing activity is available below.
- Info
- Insider Ownership
Insider Trading & Ownership of David W. Heinzmann
- Location
- Chicago, IL
- Summary
- The estimated net worth of David W. Heinzmann is at least $16,864,365 dollars as of 09 May 2025. David W. Heinzmann is the President & CEO, Director of LITTELFUSE INC /DE and owns shares of LITTELFUSE INC /DE (LFUS) stock worth about $16.41M. David W. Heinzmann is the Director of Gentherm Inc and owns shares of Gentherm Inc (THRM) stock worth about $456.5K.
- Signature
- /s/ Stephanie Swan, by Power of Attorney
- All Insider Reports
- All Insider Reports
Follow Filing Activity
Follow David W. Heinzmann and return when a new Insider Trading filing changes the record on this page.
This uses the existing product follow flow to surface future filing-backed changes without guessing what they mean.
What Changed
- Largest disclosed position: LITTELFUSE INC /DE ($16,407,833).
- Past-year value change for that position: .
Why This Matters
- This page translates Forms 3/4/5 into a quick ownership context before you inspect each transaction row.
- You can cross-check role, issuer, and filing chronology directly against the SEC source.
Source Evidence
Filed on Form 4
See Original Filing
Insider ownership context is sourced from SEC Forms 3, 4, and 5.
Ownership of David W. Heinzmann
| Symbol | Company | Relationship | Holdings Value | Past Year Net Change | Change % | Report Period |
|---|---|---|---|---|---|---|
| LFUS | LITTELFUSE INC /DE | President & CEO, Director | $16,407,833 | 26 Aug 2024 | ||
| THRM | Gentherm Inc | Director | $456,532 | 08 May 2025 |
Insider Transactions Reported by David W. Heinzmann:
| Sym | Company | Class | Transaction | % | Value $ | * Price $ | Shares | Shares After | Date | Ownership |
|---|
* An asterisk sign (*) next to the price indicates that the price is likely invalid.