Sean Thomas Willson

CIK 2048274 · Senior Vice President & CAO · last filed 2026-08-24

Sean Thomas Willson is a Senior Vice President & CAO who has filed 13 SEC Form 4 insider transactions across 2 companies since 2025. The most recent filing shows the insider sold $19.9K of VMRK on Aug 24, 2026. Across all open-market trades the lifetime net is −$91.3K, making them a net seller over the disclosed history.

"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

Companies

Total Filings

Lifetime Open-Market Net

-$91.3K

Charts

Trading activity, where the exposure sits, and each trade against the stock price.

Filer Profile

Reported Address

4040 WILSON BLVD.
SUITE 1000
ARLINGTON, VA 22203

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
VMRK	Senior Vice President & CAO	17,988	—	—	-$36.0K	2	2026-08-24
AVALONBAY COMMUNITIES INC (AVB) Delisted	Senior Vice President	0	$184.06	$0	-$55.3K	7	2026-08-17

Recent Filings

13 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
2026-08-24	VMRK	Sell (S)	−300	-$19.9K	EDGAR
2026-08-21	EQR	Notice (144)	−300	-$19.9K	EDGAR
2026-08-19	EQR	Notice (144)	−250	-$16.1K	EDGAR
2026-08-19	VMRK	Mixed	+5,796	-$16.1K	EDGAR
2026-08-17	AVALONBAY COMMUNITIES INC (AVB) Delisted	Mixed	−4,472	$0	EDGAR
2026-03-03	AVALONBAY COMMUNITIES INC (AVB) Delisted	Tax (F)	−249	-$44.1K	EDGAR
2026-03-02	AVALONBAY COMMUNITIES INC (AVB) Delisted	Grant (A)	+963	$0	EDGAR
2025-12-03	AVALONBAY COMMUNITIES INC (AVB) Delisted	Sell (S)	−150	-$27.0K	EDGAR
2025-12-02	AVALONBAY COMMUNITIES INC (AVB) Delisted	Notice (144)	−150	-$27.0K	EDGAR
2025-08-11	AVALONBAY COMMUNITIES INC (AVB) Delisted	Sell (S)	−150	-$28.2K	EDGAR

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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.