Offerings // ASPEN AEROGELS INC

ASPN offering history

Every offering-related filing in ASPEN AEROGELS INC’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 867 filings back to Feb 5, 2002.

Last executed offering

Oct 22, 2024

424B5 — priced deal (shares or notes)

Last registration (announced)

Oct 21, 2024

S-3ASR — 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
Oct 22, 2024	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Oct 21, 2024	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Oct 21, 2024	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
May 10, 2024	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
May 2, 2024	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Dec 21, 2023	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Apr 21, 2023	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Nov 30, 2022	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Nov 29, 2022	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jun 29, 2022	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jun 29, 2022	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
May 13, 2022	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
May 4, 2022	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Mar 16, 2022	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Feb 17, 2022	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Sep 24, 2021	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Sep 20, 2021	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Sep 10, 2021	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Jun 30, 2021	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Apr 23, 2021	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Mar 15, 2021	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Nov 5, 2020	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Feb 13, 2020	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Feb 12, 2020	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Sep 18, 2018	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Aug 31, 2018	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Nov 21, 2017	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Nov 20, 2017	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Nov 8, 2017	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Jun 16, 2014	424B4 →	EXECUTED	Final prospectus — offering priced (typical for IPOs and marketed share deals)
Jun 13, 2014	FWP →	MARKETING	Free-writing prospectus — offering being marketed
Jun 12, 2014	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
Jun 12, 2014	FWP →	MARKETING	Free-writing prospectus — offering being marketed
Jun 12, 2014	S-1MEF →	REGISTERED	S-1MEF registration — capacity to sell shares, not a sale yet
Jun 12, 2014	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Jun 10, 2014	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
Jun 10, 2014	FWP →	MARKETING	Free-writing prospectus — offering being marketed
Jun 2, 2014	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
May 22, 2014	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
May 14, 2014	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet

ASPN 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 ASPN workspace →

ASPN offering FAQ

When did ASPN last execute an offering?

Per SEC filings, ASPEN AEROGELS INC's most recent priced offering document is a 424B5 filed 2024-10-22. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did ASPN last announce or register an offering?

The most recent registration is a S-3ASR filed 2024-10-21. 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.