Isabelle Boccon-Gibod

CIK 2092744 · last filed 2026-02-27

Isabelle Boccon-Gibod is a corporate insider who has filed 2 SEC Form 4 insider transactions across 1 company since 2026. The most recent filing shows the insider sold $257.7K of CSTM on Feb 27, 2026. Across all open-market trades the lifetime net is −$257.7K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $677.1K 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

$677.1K

Companies

1

Total Filings

2

Lifetime Open-Market Net

-$257.7K

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
CSTM	Director	23,000	$29.44	$677.1K	-$257.7K	1	2026-02-27

Recent Filings

2 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
2026-02-27	CSTM	Sell (S)	−10,000	-$257.7K	EDGAR
2026-02-25	CSTM	Notice (144)	−10,000	-$257.7K	EDGAR

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.