SIDNEY B DEBOER

CIK 1170769 · Executive Chairman · last filed 2026-05-01

SIDNEY B DEBOER is an Executive Chairman who has filed 192 SEC Form 4 insider transactions across 1 company since 2007. The most recent filing, for LAD, was dated May 1, 2026. Across all open-market trades the lifetime net is −$159.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $11.1M 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.

Disclosed Exposure

$11.14M

Companies

1

Total Filings

192

Lifetime Open-Market Net

-$158.96M

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
LAD	Director	26,276	$423.81	$11.14M	-$158.96M	183	2026-05-01

Recent Filings

192 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
2026-05-01	LAD	Mixed	+657	-$16.8K	EDGAR
2026-03-04	LAD	Tax (F)	−54	-$15.1K	EDGAR
2025-11-04	LAD	Tax (F)	−79	-$24.8K	EDGAR
2025-08-01	LAD	Tax (F)	−79	-$22.8K	EDGAR
2025-05-16	LAD	Gift (G)	−5,000	$0	EDGAR
2025-05-14	LAD	Sell (S)	−5,000	-$1.43M	EDGAR
2025-05-01	LAD	Tax (F)	−79	-$23.1K	EDGAR
2025-04-24	LAD	Grant (A)	+672	$0	EDGAR
2025-03-04	LAD	Tax (F)	−86	-$29.6K	EDGAR
2024-09-16	LAD	Notice (144)	−5,000	-$1.39M	EDGAR

Showing 1–10 of 192

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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.