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DONALD R DIXON

CIK 1045434 · last filed 2026-06-16

DONALD R DIXON is a corporate insider who has filed 36 SEC Form 4 insider transactions across 4 companies since 2010. The most recent filing, for AMPX.WS, was dated Jun 16, 2026. Across all open-market trades the lifetime net is −$18.2M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $17.6M 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

$17.58M

Companies

4

Total Filings

36

Lifetime Open-Market Net

-$18.21M

Filer Profile

Reported Address
400 S EL CAMINO REAL SUITE 1050
SAN MATEO, CA 94402
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
AMPX.WS Director 639,459 $3.20 $2.05M -$2.54M 6 2026-06-16
IronNet, Inc. (IRNT.WS) Delisted Director 2,341,004 $0.01 $16.4K $0 4 2022-07-14
QLYS Director 90,495 $171.65 $15.53M -$15.66M 16 2018-06-20
XRS Corp (XATA) Delisted Director 12,500 — — $0 4 2012-02-10

Recent Filings

36 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
2026-06-16 AMPX.WS Mixed −74,577 -$1.46M EDGAR
2026-06-11 AMPX.WS Sell (S) −40,000 -$765.2K EDGAR
2026-06-08 AMPX Notice (144) −125,000 -$2.36M EDGAR
2026-05-28 AMPX.WS Sell (S) −17,895 -$320.3K EDGAR
2026-05-26 AMPX Notice (144) −17,895 -$315.8K EDGAR
2025-06-17 AMPX.WS Grant (A) +44,444 $0 EDGAR
2024-06-07 AMPX.WS Grant (A) +125,000 $0 EDGAR
2023-06-12 AMPX.WS Grant (A) +17,895 $0 EDGAR
2022-09-16 — Grant (A) — $0
2022-07-14 IronNet, Inc. (IRNT.WS) Delisted Grant (A) +76,174 $0 EDGAR
Showing 1–10 of 36
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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.