Vander Ploeg David

Director at Knight-Swift Transportation Holdings Inc. · on record since Dec 14, 2010
Director at KNIGHT TRANSPORTATION INC · on record since May 13, 2026
EVP/CFO at SCHOOL SPECIALTY INC · on record since Jun 13, 2013

Insider trading activity of Vander Ploeg David

Transactions on record: 44; since May 7, 2008

Open-market buys: 3; $43.1K

Open-market sells: 3; $245.2K

Companies traded: 3; last filing Aug 13, 2026

Figures computed from official regulatory filings — .

Companies where Vander Ploeg David has traded

Knight-Swift Transportation Holdings Inc.8 tx · $215.1K · Aug 13, 2026
KNIGHT TRANSPORTATION INC16 tx · $937.6K · May 13, 2026
SCHOOL SPECIALTY INC20 tx · $1.7M · Jun 13, 2013

Track record of Vander Ploeg David

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of Vander Ploeg David

Co-insiders of Vander Ploeg David

Brown Glenn FKnight-Swift Transportation Holdings Inc. +1
Cardenas Jose AKnight-Swift Transportation Holdings Inc. +1
Dove ReidKnight-Swift Transportation Holdings Inc. +1
DOZER RICHARD HKnight-Swift Transportation Holdings Inc. +1
Dragash Mickey RKnight-Swift Transportation Holdings Inc. +1
Flanagan Cary MKnight-Swift Transportation Holdings Inc. +1
Guin Timothy WKnight-Swift Transportation Holdings Inc. +1
Henkels VirginiaKnight-Swift Transportation Holdings Inc. +1
Killebrew Chad EKnight-Swift Transportation Holdings Inc. +1
KNIGHT GARY JKnight-Swift Transportation Holdings Inc. +1
Moyes MichaelKnight-Swift Transportation Holdings Inc. +1
Nester Lyndee MoyesKnight-Swift Transportation Holdings Inc. +1
Runnels Kenneth CKnight-Swift Transportation Holdings Inc. +1
Van Kirk Steven RichardKnight-Swift Transportation Holdings Inc. +1
Admiralty Advisors LLCSCHOOL SPECIALTY INC
Alexander Brian PatrickKnight-Swift Transportation Holdings Inc.
Baehler Kevin LSCHOOL SPECIALTY INC
BLISS DONALD AKNIGHT TRANSPORTATION INC

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Src
Knight-Swift Transportation Holdings Inc.Listing on record	Aug 13, 2026	Sell	-2,200	52.33 USD	$115.1K	SEC
KNIGHT TRANSPORTATION INCListing unverified	May 13, 2026	Award	2,504	59.90 USD	$150K	SEC
KNIGHT TRANSPORTATION INCListing unverified	Dec 2, 2025	Gift	-3,604	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
KNIGHT TRANSPORTATION INCListing unverified	May 14, 2025	Award	2,823	46.05 USD	$130K	SEC
KNIGHT TRANSPORTATION INCListing unverified	Nov 14, 2024	Gift	-3,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
KNIGHT TRANSPORTATION INCListing unverified	Nov 14, 2024	Sell	-500	57.10 USD	$28.6K	SEC
KNIGHT TRANSPORTATION INCListing unverified	May 15, 2024	Award	2,627	49.48 USD	$130K	SEC
KNIGHT TRANSPORTATION INCListing unverified	Dec 28, 2023	Gift	-2,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
KNIGHT TRANSPORTATION INCListing unverified	May 18, 2023	Award	2,403	55.12 USD	$132.5K	SEC
KNIGHT TRANSPORTATION INCListing unverified	May 18, 2022	Award	2,578	48.47 USD	$125K	SEC
KNIGHT TRANSPORTATION INCListing unverified	May 20, 2021	Award	2,155	48.72 USD	$105K	SEC
KNIGHT TRANSPORTATION INCListing unverified	May 20, 2020	Award	2,419	—	n/a (No price was disclosed in the filing)	SEC
KNIGHT TRANSPORTATION INCListing unverified	Nov 1, 2019	ExerciseD (derivative)	-2,880	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
KNIGHT TRANSPORTATION INCListing unverified	Nov 1, 2019	Sell	-2,760	36.77 USD	$101.5K	SEC
KNIGHT TRANSPORTATION INCListing unverified	Nov 1, 2019	Exercise	2,880	12.23 USD	$35.2K	SEC
KNIGHT TRANSPORTATION INCListing unverified	May 31, 2019	Award	2,854	—	n/a (No price was disclosed in the filing)	SEC
KNIGHT TRANSPORTATION INCListing unverified	Jun 4, 2018	Award	2,458	—	n/a (No price was disclosed in the filing)	SEC
Knight-Swift Transportation Holdings Inc.Listing on record	May 25, 2017	Award	4,168	23.99 USD	$100K	SEC
Knight-Swift Transportation Holdings Inc.Listing on record	May 26, 2016	Award	6,447	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Knight-Swift Transportation Holdings Inc.Listing on record	May 12, 2015	Award	3,532	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Knight-Swift Transportation Holdings Inc.Listing on record	May 28, 2014	Award	3,833	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
SCHOOL SPECIALTY INCListing on record	Jun 13, 2013	OtherD (derivative)	-30,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
SCHOOL SPECIALTY INCListing on record	Jun 13, 2013	OtherD (derivative)	-21,400	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
SCHOOL SPECIALTY INCListing on record	Jun 13, 2013	OtherD (derivative)	-25,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
SCHOOL SPECIALTY INCListing on record	Jun 13, 2013	Other	-48,958	—	n/a (No price was disclosed in the filing)	SEC

Company	Filed	Type	Qty	Price	Value · USD	Src
Knight-Swift Transportation Holdings Inc.Listing on record	Aug 13, 2026	Sell	-2,200	52.33 USD	$115.1K	SEC
KNIGHT TRANSPORTATION INCListing unverified	May 13, 2026	Award	2,504	59.90 USD	$150K	SEC
KNIGHT TRANSPORTATION INCListing unverified	Dec 2, 2025	Gift	-3,604	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
KNIGHT TRANSPORTATION INCListing unverified	May 14, 2025	Award	2,823	46.05 USD	$130K	SEC
KNIGHT TRANSPORTATION INCListing unverified	Nov 14, 2024	Gift	-3,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
KNIGHT TRANSPORTATION INCListing unverified	Nov 14, 2024	Sell	-500	57.10 USD	$28.6K	SEC
KNIGHT TRANSPORTATION INCListing unverified	May 15, 2024	Award	2,627	49.48 USD	$130K	SEC
KNIGHT TRANSPORTATION INCListing unverified	Dec 28, 2023	Gift	-2,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
KNIGHT TRANSPORTATION INCListing unverified	May 18, 2023	Award	2,403	55.12 USD	$132.5K	SEC
KNIGHT TRANSPORTATION INCListing unverified	May 18, 2022	Award	2,578	48.47 USD	$125K	SEC
KNIGHT TRANSPORTATION INCListing unverified	May 20, 2021	Award	2,155	48.72 USD	$105K	SEC
KNIGHT TRANSPORTATION INCListing unverified	May 20, 2020	Award	2,419	—	n/a (No price was disclosed in the filing)	SEC
KNIGHT TRANSPORTATION INCListing unverified	Nov 1, 2019	ExerciseD (derivative)	-2,880	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
KNIGHT TRANSPORTATION INCListing unverified	Nov 1, 2019	Sell	-2,760	36.77 USD	$101.5K	SEC
KNIGHT TRANSPORTATION INCListing unverified	Nov 1, 2019	Exercise	2,880	12.23 USD	$35.2K	SEC
KNIGHT TRANSPORTATION INCListing unverified	May 31, 2019	Award	2,854	—	n/a (No price was disclosed in the filing)	SEC
KNIGHT TRANSPORTATION INCListing unverified	Jun 4, 2018	Award	2,458	—	n/a (No price was disclosed in the filing)	SEC
Knight-Swift Transportation Holdings Inc.Listing on record	May 25, 2017	Award	4,168	23.99 USD	$100K	SEC
Knight-Swift Transportation Holdings Inc.Listing on record	May 26, 2016	Award	6,447	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Knight-Swift Transportation Holdings Inc.Listing on record	May 12, 2015	Award	3,532	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Knight-Swift Transportation Holdings Inc.Listing on record	May 28, 2014	Award	3,833	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
SCHOOL SPECIALTY INCListing on record	Jun 13, 2013	OtherD (derivative)	-30,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
SCHOOL SPECIALTY INCListing on record	Jun 13, 2013	OtherD (derivative)	-21,400	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
SCHOOL SPECIALTY INCListing on record	Jun 13, 2013	OtherD (derivative)	-25,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
SCHOOL SPECIALTY INCListing on record	Jun 13, 2013	Other	-48,958	—	n/a (No price was disclosed in the filing)	SEC