Offerings // CONSTELLIUM SE

CSTM offering history

Every offering-related filing in CONSTELLIUM SE’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 507 filings back to Dec 3, 2012.

Last executed offering

Nov 2, 2017

424B5 — priced deal (shares or notes)

Last registration (announced)

Jun 24, 2026

S-3ASR — capacity, not a sale

Executed, last 12 months

424B pricings + 8-K 3.02 sales

Registered, last 12 months

S-1/S-3/F-series registrations

Date	Filing		What it means
Jun 24, 2026	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Mar 20, 2024	F-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Nov 13, 2020	F-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Oct 23, 2019	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Oct 23, 2019	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Nov 2, 2017	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Oct 31, 2017	FWP →	MARKETING	Free-writing prospectus — offering being marketed
Oct 30, 2017	F-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Oct 30, 2017	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Sep 20, 2016	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Sep 20, 2016	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Sep 13, 2016	F-3/A →	REGISTERED	F-3/A registration — capacity to sell shares, not a sale yet
May 13, 2016	F-3 →	REGISTERED	F-3 registration — capacity to sell shares, not a sale yet
Mar 7, 2014	424B4 →	EXECUTED	Final prospectus — offering priced (typical for IPOs and marketed share deals)
Feb 7, 2014	424B4 →	EXECUTED	Final prospectus — offering priced (typical for IPOs and marketed share deals)
Feb 5, 2014	FWP →	MARKETING	Free-writing prospectus — offering being marketed
Feb 5, 2014	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Feb 4, 2014	F-1/A →	REGISTERED	F-1/A registration — capacity to sell shares, not a sale yet
Jan 27, 2014	F-1 →	REGISTERED	F-1 registration — capacity to sell shares, not a sale yet
Dec 12, 2013	424B4 →	EXECUTED	Final prospectus — offering priced (typical for IPOs and marketed share deals)
Dec 11, 2013	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Dec 10, 2013	F-1/A →	REGISTERED	F-1/A registration — capacity to sell shares, not a sale yet
Dec 6, 2013	F-1 →	REGISTERED	F-1 registration — capacity to sell shares, not a sale yet
Nov 8, 2013	424B4 →	EXECUTED	Final prospectus — offering priced (typical for IPOs and marketed share deals)
Nov 6, 2013	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Nov 4, 2013	F-1/A →	REGISTERED	F-1/A registration — capacity to sell shares, not a sale yet
Oct 23, 2013	F-1 →	REGISTERED	F-1 registration — capacity to sell shares, not a sale yet
May 23, 2013	424B4 →	EXECUTED	Final prospectus — offering priced (typical for IPOs and marketed share deals)
May 22, 2013	F-1/A →	REGISTERED	F-1/A registration — capacity to sell shares, not a sale yet
May 22, 2013	F-1/A →	REGISTERED	F-1/A registration — capacity to sell shares, not a sale yet
May 22, 2013	FWP →	MARKETING	Free-writing prospectus — offering being marketed
May 22, 2013	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
May 21, 2013	F-1/A →	REGISTERED	F-1/A registration — capacity to sell shares, not a sale yet
May 17, 2013	F-1/A →	REGISTERED	F-1/A registration — capacity to sell shares, not a sale yet
May 14, 2013	F-1/A →	REGISTERED	F-1/A registration — capacity to sell shares, not a sale yet
May 13, 2013	F-1 →	REGISTERED	F-1 registration — capacity to sell shares, not a sale yet

CSTM offering-related filings from SEC EDGAR, newest first (capped at 40). Each links to the original document.

Two honest limits. (1) A 424B takedown can price shares or notes — EDGAR’s metadata doesn’t say which, so open the document: large investment-grade filers use these mostly for bond deals (no dilution), small-caps mostly for shares. (2) At-the-market (ATM) programs sell shares gradually and individual sales are not separately filed — the visible footprint is the enabling shelf and its 424B5; actual ATM share counts surface later in the 10-Q/10-K share count. Educational information from public filings, not investment advice.

Is a shelf active now? →Do they need money? →Red flags →Full CSTM workspace →

CSTM offering FAQ

When did CSTM last execute an offering?

Per SEC filings, CONSTELLIUM SE's most recent priced offering document is a 424B5 filed 2017-11-02. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did CSTM last announce or register an offering?

The most recent registration is a S-3ASR filed 2026-06-24. A registration is capacity to sell shares — not a sale.

Does an offering always mean dilution?

Registered direct offerings and shelf takedowns issue new shares and dilute existing holders. Resale registrations (424B3/B7) let existing holders sell and do not create new shares. Secondary sales by insiders also do not dilute. Each row here is labeled with what it is.

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