David Chairman

CIK 1971553 · SVP, R&D · last filed 2026-06-16

David Chairman is a SVP, R&D who has filed 20 SEC Form 4 insider transactions across 1 company since 2026. The most recent filing, for VLN.WS, was dated Jun 16, 2026. Across all open-market trades the lifetime net is −$50.3K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $3.2K 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

$3.2K

Companies

1

Total Filings

20

Lifetime Open-Market Net

-$50.3K

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
VLN.WS	SVP, R&D	403,968	$0.01	$3.2K	-$50.3K	7	2026-06-16

Recent Filings

20 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
2026-06-16	VLN.WS	Mixed	—	-$6.3K	EDGAR
2026-06-15	VLN	Notice (144)	−8,000	-$17.7K	EDGAR
2026-05-14	VLN.WS	Mixed	—	-$8.5K	EDGAR
2026-05-11	VLN.WS	Mixed	—	-$6.7K	EDGAR
2026-05-11	VLN	Notice (144)	−8,000	-$19.3K	EDGAR
2026-04-27	VLN.WS	Mixed	—	-$2.9K	EDGAR
2026-04-23	VLN.WS	Mixed	—	-$316	EDGAR
2026-04-23	VLN	Notice (144)	−4,000	-$6.0K	EDGAR
2026-04-20	VLN.WS	Mixed	—	-$1.5K	EDGAR
2026-04-16	VLN.WS	Mixed	—	-$3.4K	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.