PETER J GUNDERMANN
CIK 1182854 · PRESIDENT/CEO · last filed 2026-06-17
"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
$11.89M
Companies
2
Total Filings
116
Lifetime Open-Market Net
-$3.64M
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 6 of 12
116 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 |
|---|---|---|---|---|---|
| 2018-10-16 | ATRO | Other (J) | +74,073 | $0 | EDGAR |
| 2018-08-07 | ATRO | Mixed | −47,322 | -$2.13M | EDGAR |
| 2018-04-24 | ATRO | Sell (S) | −2,000 | -$77.6K | EDGAR |
| 2018-04-17 | ATRO | Sell (S) | −2,000 | -$72.8K | EDGAR |
| 2018-04-10 | ATRO | Sell (S) | −2,000 | -$72.7K | EDGAR |
| 2018-04-04 | ATRO | Sell (S) | −2,000 | -$73.3K | EDGAR |
| 2018-03-27 | ATRO | Sell (S) | −2,000 | -$72.2K | EDGAR |
| 2018-03-20 | ATRO | Sell (S) | −2,000 | -$77.8K | EDGAR |
| 2018-03-13 | ATRO | Sell (S) | −2,000 | -$81.2K | EDGAR |
| 2018-03-05 | ATRO | Mixed | −2,000 | -$79.3K | 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.