Offerings // ASTROTECH Corp

ASTC offering history

Every offering-related filing in ASTROTECH Corp’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 1,000 filings back to Nov 7, 2003.

Last executed offering

Aug 19, 2026

424B5 — priced deal (shares or notes)

Last registration (announced)

Jun 30, 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 19, 2026	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Aug 19, 2026	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jul 7, 2026	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Jun 30, 2026	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Jun 3, 2026	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jan 30, 2026	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Jan 28, 2026	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Jun 16, 2023	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Sep 8, 2021	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Apr 12, 2021	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Apr 9, 2021	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Apr 8, 2021	FWP →	MARKETING	Free-writing prospectus — offering being marketed
Apr 7, 2021	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Apr 7, 2021	FWP →	MARKETING	Free-writing prospectus — offering being marketed
Mar 15, 2021	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Mar 3, 2021	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Feb 16, 2021	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Feb 12, 2021	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Dec 18, 2020	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Oct 30, 2020	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Oct 22, 2020	424B4 →	EXECUTED	Final prospectus — offering priced (typical for IPOs and marketed share deals)
Oct 21, 2020	S-1MEF →	REGISTERED	S-1MEF registration — capacity to sell shares, not a sale yet
Oct 21, 2020	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Sep 30, 2020	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
Sep 14, 2020	FWP →	MARKETING	Free-writing prospectus — offering being marketed
Sep 9, 2020	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
Aug 26, 2020	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Jul 6, 2020	S-1 →	REGISTERED	S-1 registration — capacity to sell shares, not a sale yet
Mar 30, 2020	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Mar 26, 2020	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Mar 26, 2020	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Mar 25, 2020	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Feb 18, 2020	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Sep 11, 2019	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Apr 23, 2019	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Nov 9, 2018	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Nov 8, 2018	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Oct 24, 2018	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Oct 12, 2018	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Aug 20, 2018	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin

ASTC 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 ASTC workspace →

ASTC offering FAQ

When did ASTC last execute an offering?

Per SEC filings, ASTROTECH Corp's most recent priced offering document is a 424B5 filed 2026-08-19. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did ASTC last announce or register an offering?

The most recent registration is a S-3 filed 2026-06-30. 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.