Home

David Vander Ploeg

CIK 1432894 · EVP/CFO · last filed 2026-08-13

David Vander Ploeg is an EVP/CFO who has filed 30 SEC Form 4 insider transactions across 3 companies since 2008. The most recent filing shows the insider sold $115.1K of KNX on Aug 13, 2026. Across all open-market trades the lifetime net is −$202.0K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $2.6M 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.

Loading insider history…
Disclosed Exposure

$2.61M

Companies

3

Total Filings

30

Lifetime Open-Market Net

-$202.0K

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
KNX Director 37,404 $69.74 $2.61M -$245.2K 14 2026-08-13
Knight-Swift Transportation Holdings Inc. (SWFT) Delisted Director 18,616 — — $0 6 2017-05-25
SCHOOL SPECIALTY INC (SCHS) Delisted EVP / CFO 18,958 — — $43.1K 9 2012-07-10

Recent Filings

30 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
2026-08-13 KNX Sell (S) −2,200 -$115.1K EDGAR
2026-05-13 KNX Grant (A) +2,504 $150.0K EDGAR
2025-12-02 KNX Gift (G) −3,604 $0 EDGAR
2025-05-14 KNX Grant (A) +2,823 $130.0K EDGAR
2024-11-14 KNX Mixed −3,500 -$28.6K EDGAR
2024-05-15 KNX Grant (A) +2,627 $130.0K EDGAR
2023-12-28 KNX Gift (G) −2,000 $0 EDGAR
2023-05-18 KNX Grant (A) +2,403 $132.5K EDGAR
2022-05-18 KNX Grant (A) +2,578 $125.0K EDGAR
2021-05-20 KNX Grant (A) +2,155 $105.0K EDGAR
Showing 1–10 of 30
Page 1 of 3
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.