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JEFFREY W DUNN

CIK 1035986 · Chairman, President & CEO · last filed 2026-06-08

JEFFREY W DUNN is a Chairman, President & CEO who has filed 89 SEC Form 4 insider transactions across 1 company since 2019. The most recent filing, for SIBN, was dated Aug 3, 2026. Across all open-market trades the lifetime net is −$28.9M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $1.9M 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

$1.91M

Companies

1

Total Filings

89

Lifetime Open-Market Net

-$28.88M

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
SIBN Director 101,187 $18.84 $1.91M -$28.88M 83 2026-06-08

Recent Filings

89 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
2026-08-03 SIBN Notice (144) −80,000 -$1.42M EDGAR
2026-06-08 SIBN Mixed +7,382 -$54.5K EDGAR
2026-05-05 SIBN Sell (S) −337 -$4.4K EDGAR
2026-02-04 SIBN Sell (S) −337 -$5.5K EDGAR
2026-01-12 SIBN Sell (S) −20,000 -$425.5K EDGAR
2026-01-08 SIBN Notice (144) −60,000 -$1.28M EDGAR
2025-12-11 SIBN Mixed −18,759 -$381.2K EDGAR
2025-12-08 SIBN Notice (144) −20,000 -$393.6K EDGAR
2025-11-13 SIBN Mixed — -$1.17M EDGAR
2025-11-12 SIBN Notice (144) −80,000 -$1.25M EDGAR
Showing 1–10 of 89
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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.