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Offerings // Akari Therapeutics Plc

AKTX offering history

Every offering-related filing in Akari Therapeutics Plc’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 724 filings back to Apr 13, 2012.

Last executed offering
May 22, 2026
8-K — priced deal (shares or notes)
Last registration (announced)
Jul 10, 2026
S-3/A — capacity, not a sale
Executed, last 12 months
6
424B pricings + 8-K 3.02 sales
Registered, last 12 months
8
S-1/S-3/F-series registrations
DateFilingWhat it means
Jul 13, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jul 10, 2026S-3/A →REGISTEREDS-3/A registration — capacity to sell shares, not a sale yet
Jul 8, 2026S-3/A →REGISTEREDS-3/A registration — capacity to sell shares, not a sale yet
Jul 7, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jul 2, 2026S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Jun 26, 2026S-1/A →REGISTEREDS-1/A registration — capacity to sell shares, not a sale yet
May 22, 20268-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
May 21, 2026RW →WITHDRAWNRegistration withdrawn
May 8, 2026S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Apr 15, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jan 29, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jan 23, 2026S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Dec 17, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Dec 17, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Dec 5, 2025424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Dec 2, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Nov 17, 2025S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Oct 16, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Oct 16, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Aug 29, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Aug 29, 2025S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Jul 31, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jul 29, 2025S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
May 14, 2025424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
May 14, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
May 6, 2025S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Mar 3, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Nov 14, 20248-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Oct 11, 2024424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Oct 11, 2024EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Sep 16, 2024424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Sep 13, 2024EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Sep 6, 2024S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Jun 4, 20248-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Mar 11, 20248-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Jan 2, 20248-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Oct 27, 2023424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Oct 26, 2023EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Oct 23, 2023EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Oct 23, 2023EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
AKTX 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 AKTX workspace →
AKTX offering FAQ

When did AKTX last execute an offering?

Per SEC filings, Akari Therapeutics Plc's most recent priced offering document is a 8-K filed 2026-05-22. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did AKTX last announce or register an offering?

The most recent registration is a S-3/A filed 2026-07-10. 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.