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Offerings // Addex Therapeutics Ltd.

ADXN offering history

Every offering-related filing in Addex Therapeutics Ltd.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 279 filings back to Sep 24, 2019.

Last executed offering
Dec 10, 2025
424B5 — priced deal (shares or notes)
Last registration (announced)
Nov 19, 2025
F-3 — capacity, not a sale
Executed, last 12 months
1
424B pricings + 8-K 3.02 sales
Registered, last 12 months
1
S-1/S-3/F-series registrations
DateFilingWhat it means
Dec 10, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Dec 5, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Nov 19, 2025F-3 →REGISTEREDF-3 registration — capacity to sell shares, not a sale yet
Apr 24, 2024424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Apr 22, 2024EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jan 30, 2024424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Nov 30, 2023424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Nov 29, 2023EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Oct 23, 2023424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Aug 11, 2023424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Aug 10, 2023EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jun 2, 2023424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Jun 2, 2023EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jun 1, 2023F-1/A →REGISTEREDF-1/A registration — capacity to sell shares, not a sale yet
May 11, 2023F-1/A →REGISTEREDF-1/A registration — capacity to sell shares, not a sale yet
May 3, 2023F-1 →REGISTEREDF-1 registration — capacity to sell shares, not a sale yet
Apr 4, 2023424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Nov 22, 2022424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Nov 16, 2022424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Aug 30, 2022424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Aug 29, 2022EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Aug 29, 2022EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Aug 19, 2022F-1 →REGISTEREDF-1 registration — capacity to sell shares, not a sale yet
Jul 26, 2022424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jul 20, 2022424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Apr 19, 2022EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Apr 4, 2022EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jan 19, 2022424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Jan 18, 2022EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jan 7, 2022F-1 →REGISTEREDF-1 registration — capacity to sell shares, not a sale yet
Dec 20, 2021424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jun 30, 2021424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Apr 13, 2021EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Apr 7, 2021F-3 →REGISTEREDF-3 registration — capacity to sell shares, not a sale yet
Jan 8, 2021424B4 →EXECUTEDFinal prospectus — offering priced (typical for IPOs and marketed share deals)
Jan 6, 2021F-1/A →REGISTEREDF-1/A registration — capacity to sell shares, not a sale yet
Jan 6, 2021EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Dec 14, 2020F-1 →REGISTEREDF-1 registration — capacity to sell shares, not a sale yet
Jan 28, 2020424B4 →EXECUTEDFinal prospectus — offering priced (typical for IPOs and marketed share deals)
Jan 27, 2020EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
ADXN 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 ADXN workspace →
ADXN offering FAQ

When did ADXN last execute an offering?

Per SEC filings, Addex Therapeutics Ltd.'s most recent priced offering document is a 424B5 filed 2025-12-10. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did ADXN last announce or register an offering?

The most recent registration is a F-3 filed 2025-11-19. 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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