David W Heinzmann
CIK 1279765 · President & CEO · last filed 2026-05-15
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
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Disclosed Exposure
$28.63M
Companies
2
Total Filings
92
Lifetime Open-Market Net
-$37.70M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Recent Filings · Page 3 of 10
92 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2023-04-25 | LFUS | Tax (F) | −2,736 | -$672.2K | EDGAR |
| 2023-02-16 | LFUS | Mixed | — | -$2.73M | EDGAR |
| 2022-06-06 | THRM | Grant (A) | +1,700 | $0 | EDGAR |
| 2022-05-02 | LFUS | Grant (A) | +8,619 | $0 | EDGAR |
| 2022-04-28 | LFUS | Tax (F) | −1,123 | -$252.0K | EDGAR |
| 2022-04-26 | LFUS | Tax (F) | −2,736 | -$633.4K | EDGAR |
| 2021-11-18 | LFUS | Mixed | — | -$868.1K | EDGAR |
| 2021-11-16 | LFUS | Mixed | — | -$2.62M | EDGAR |
| 2021-10-22 | LFUS | Sell (S) | −9,867 | -$2.90M | EDGAR |
| 2021-05-24 | THRM | Grant (A) | +1,422 | $0 | EDGAR |
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.