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Offerings // ADC Therapeutics SA

ADCT offering history

Every offering-related filing in ADC Therapeutics SA’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 434 filings back to Jun 27, 2019.

Last executed offering
Feb 23, 2026
8-K — priced deal (shares or notes)
Last registration (announced)
Mar 10, 2026
S-3 — capacity, not a sale
Executed, last 12 months
2
424B pricings + 8-K 3.02 sales
Registered, last 12 months
3
S-1/S-3/F-series registrations
DateFilingWhat it means
Apr 15, 2026424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Mar 16, 2026424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Mar 16, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Mar 10, 2026S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Feb 23, 20268-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Dec 12, 2025424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Dec 12, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Dec 9, 2025S-3/A →REGISTEREDS-3/A registration — capacity to sell shares, not a sale yet
Nov 10, 2025S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Oct 14, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Jul 10, 2025424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Jul 9, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jun 30, 2025S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Jun 12, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Aug 13, 2024EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Aug 6, 2024S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
May 7, 2024424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
May 6, 2024424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Mar 15, 2024424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Mar 15, 2024424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Mar 14, 2024EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Mar 14, 2024EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Mar 14, 2024EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Mar 24, 2023EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Mar 20, 2023EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Mar 15, 2023F-3 →REGISTEREDF-3 registration — capacity to sell shares, not a sale yet
Feb 2, 2023FWP →MARKETINGFree-writing prospectus — offering being marketed
Feb 2, 2023FWP →MARKETINGFree-writing prospectus — offering being marketed
Feb 2, 2023424B7 →UPDATEResale prospectus — existing holders registering to sell
Sep 16, 2022424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Sep 16, 2022424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Sep 16, 2022EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Sep 16, 2022EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Sep 6, 2022F-3 →REGISTEREDF-3 registration — capacity to sell shares, not a sale yet
Sep 6, 2022F-3 →REGISTEREDF-3 registration — capacity to sell shares, not a sale yet
Jun 4, 2021F-3ASR →REGISTEREDAutomatic shelf registration — effective immediately (large filers)
Jun 1, 2021F-3ASR →REGISTEREDAutomatic shelf registration — effective immediately (large filers)
Sep 25, 2020424B4 →EXECUTEDFinal prospectus — offering priced (typical for IPOs and marketed share deals)
Sep 23, 2020EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Sep 21, 2020F-1 →REGISTEREDF-1 registration — capacity to sell shares, not a sale yet
ADCT 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 ADCT workspace →
ADCT offering FAQ

When did ADCT last execute an offering?

Per SEC filings, ADC Therapeutics SA's most recent priced offering document is a 8-K filed 2026-02-23. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did ADCT last announce or register an offering?

The most recent registration is a S-3 filed 2026-03-10. 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.