Home

Robert D Short III

CIK 1495444 · Chief Scientist · last filed 2025-07-11

Robert D Short III is a Chief Scientist who has filed 45 SEC Form 4 insider transactions across 1 company since 2011. The most recent filing shows the insider had shares withheld for taxes covering $617 of VHC on Jul 11, 2025. Across all open-market trades the lifetime net is −$7.1M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $495.9K across reported positions. 64 SEC filings were submitted jointly with VirnetX Holding Corp.

"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

$495.9K

Companies

1

Total Filings

45

Lifetime Open-Market Net

-$7.14M

Filer Profile

Reported Address
308 DORLA COURT
SUITE 206
ZEPHYR COVE, NV 89448
Related Filers
VirnetX Holding Corp — 64 joint filings, latest 2025-07-11
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
VHC Chief Scientist 43,126 $11.50 $495.9K -$7.14M 45 2025-07-11

Recent Filings

45 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
2025-07-11 VHC Tax (F) −50 -$617 EDGAR
2025-06-25 VHC Tax (F) −8 -$64 EDGAR
2024-11-14 VHC Grant (A) +30,000 $0 EDGAR
2023-07-07 VHC Grant (A) +28,150 $0 EDGAR
2022-06-14 VHC Grant (A) +13,336 $0 EDGAR
2022-04-11 VHC Tax (F) −3,533 -$17.0K EDGAR
2021-06-16 VHC Grant (A) +13,333 $0 EDGAR
2020-06-23 VHC Tax (F) −5,552 -$38.0K EDGAR
2020-06-05 VHC Grant (A) +13,333 $0 EDGAR
2020-03-23 VHC Grant (A) — $0 EDGAR
Showing 1–10 of 45
Page 1 of 5
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.