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
$28.59M
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 4 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 |
|---|---|---|---|---|---|
| 2021-04-29 | LFUS | Tax (F) | −996 | -$274.2K | EDGAR |
| 2021-04-28 | LFUS | Tax (F) | −1,123 | -$313.1K | EDGAR |
| 2021-04-27 | LFUS | Mixed | −6,759 | -$1.89M | EDGAR |
| 2021-04-26 | LFUS | Grant (A) | +6,499 | $0 | EDGAR |
| 2020-11-13 | LFUS | Sell (S) | −5,000 | -$1.10M | EDGAR |
| 2020-11-05 | LFUS | Mixed | — | -$1.99M | EDGAR |
| 2020-08-13 | THRM | Grant (A) | +4,067 | $0 | EDGAR |
| 2020-04-30 | LFUS | Tax (F) | −951 | -$135.9K | EDGAR |
| 2020-04-28 | LFUS | Tax (F) | −2,120 | -$293.5K | EDGAR |
| 2020-04-27 | LFUS | Grant (A) | +12,028 | $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.