JEFFREY W DUNN
CIK 1035986 · Chairman, President & CEO · last filed 2026-08-05
"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.
Loading insider history…
Disclosed Exposure
$2.20M
Companies
1
Total Filings
90
Lifetime Open-Market Net
-$29.25M
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 | 117,130 | $18.80 | $2.20M | -$29.25M | 84 | 2026-08-05 |
Recent Filings · Page 7 of 9
90 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 |
|---|---|---|---|---|---|
| 2021-05-07 | SIBN | Mixed | −24,900 | -$1.24M | EDGAR |
| 2021-04-20 | SIBN | Sell (S) | −2,112 | -$71.1K | EDGAR |
| 2021-04-07 | SIBN | Sell (S) | −40,000 | -$1.22M | EDGAR |
| 2021-03-08 | SIBN | Sell (S) | −40,000 | -$1.15M | EDGAR |
| 2021-02-18 | SIBN | Sell (S) | −3,507 | -$108.9K | EDGAR |
| 2021-02-09 | SIBN | Sell (S) | −40,000 | -$1.30M | EDGAR |
| 2021-01-21 | SIBN | Sell (S) | −3,268 | -$94.8K | EDGAR |
| 2021-01-07 | SIBN | Mixed | +86,000 | -$1.15M | EDGAR |
| 2020-12-09 | SIBN | Sell (S) | −40,000 | -$971.4K | EDGAR |
| 2020-11-18 | SIBN | Sell (S) | −4,493 | -$107.0K | 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.