Offerings // Autolus Therapeutics plc

AUTL offering history

Every offering-related filing in Autolus Therapeutics plc’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 329 filings back to Feb 9, 2018.

Last executed offering

Aug 3, 2026

8-K — priced deal (shares or notes)

Last registration (announced)

Apr 13, 2026

S-3 — 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
Aug 3, 2026	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
May 5, 2026	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
May 5, 2026	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Apr 13, 2026	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Apr 13, 2026	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Jan 26, 2026	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Jan 12, 2026	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Dec 2, 2025	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Nov 12, 2025	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Aug 12, 2025	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Jun 30, 2025	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
May 30, 2025	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
May 15, 2025	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
May 15, 2025	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
May 8, 2025	S-1 →	REGISTERED	S-1 registration — capacity to sell shares, not a sale yet
Mar 21, 2025	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Mar 28, 2024	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Feb 9, 2024	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Feb 8, 2024	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Feb 8, 2024	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Dec 12, 2022	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Dec 8, 2022	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
May 18, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
May 17, 2022	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
May 4, 2022	F-3 →	REGISTERED	F-3 registration — capacity to sell shares, not a sale yet
May 3, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Apr 28, 2022	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Apr 15, 2022	F-3 →	REGISTERED	F-3 registration — capacity to sell shares, not a sale yet
Aug 19, 2021	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Aug 18, 2021	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Aug 5, 2021	F-3 →	REGISTERED	F-3 registration — capacity to sell shares, not a sale yet
Feb 11, 2021	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Feb 8, 2021	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Sep 18, 2020	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jan 24, 2020	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jan 22, 2020	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jul 24, 2019	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jul 24, 2019	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Jul 17, 2019	F-3 →	REGISTERED	F-3 registration — capacity to sell shares, not a sale yet
Apr 11, 2019	424B4 →	EXECUTED	Final prospectus — offering priced (typical for IPOs and marketed share deals)

AUTL 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 AUTL workspace →

AUTL offering FAQ

When did AUTL last execute an offering?

Per SEC filings, Autolus Therapeutics plc's most recent priced offering document is a 8-K filed 2026-08-03. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did AUTL last announce or register an offering?

The most recent registration is a S-3 filed 2026-04-13. 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.