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David A. Dunbar

CIK 1595316 · President/CEO/Chairman · last filed 2026-09-01

David A. Dunbar is a President/CEO/Chairman who has filed 82 SEC Form 4 insider transactions across 2 companies since 2014. The most recent filing shows the insider sold $3.8M of SXI on Sep 1, 2026. Across all open-market trades the lifetime net is −$26.4M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $26.4M across reported positions.

"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

$26.39M

Companies

2

Total Filings

82

Lifetime Open-Market Net

-$26.43M

Filer Profile

Reported Address
11 KEEWAYDIN DRIVE
SUITE 300
SALEM, NH 03079
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

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.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
SXI President/CEO/Chairman 87,278 $261.21 $22.80M -$26.43M 60 2026-09-01
WTS Director 10,256 $350.66 $3.60M $0 13 2026-08-04

Recent Filings

82 filings
Insider 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
2026-09-01 SXI Sell (S) −13,000 -$3.78M EDGAR
2026-08-31 SXI Notice (144) −13,000 -$3.86M EDGAR
2026-08-25 SXI Mixed +9,876 -$1.91M EDGAR
2026-08-04 WTS Grant (A) +456 $0 EDGAR
2026-03-18 WTS Gift (G) +9,800 $0 EDGAR
2026-03-12 WTS Gift (G) −9,800 $0 EDGAR
2026-02-18 SXI Sell (S) −15,000 -$3.84M EDGAR
2026-02-17 SXI Notice (144) −15,000 -$3.91M EDGAR
2025-10-17 SXI Sell (S) −18,000 -$4.23M EDGAR
2025-10-15 SXI Notice (144) −18,000 -$4.23M EDGAR
Showing 1–10 of 82
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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.