Offerings // HORNBECK OFFSHORE SERVICES, INC.

HOS offering history

Every offering-related filing in HORNBECK OFFSHORE SERVICES, INC.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 1,001 filings back to Dec 12, 2011.

Last executed offering

Sep 1, 2026

8-K — priced deal (shares or notes)

Last registration (announced)

Sep 15, 2026

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
Sep 15, 2026	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Sep 1, 2026	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Jul 31, 2026	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Jul 31, 2026	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Oct 28, 2025	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Oct 28, 2022	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Aug 13, 2020	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Aug 12, 2020	FWP →	MARKETING	Free-writing prospectus — offering being marketed
Aug 11, 2020	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Oct 25, 2019	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Mar 15, 2018	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Mar 14, 2018	FWP →	MARKETING	Free-writing prospectus — offering being marketed
Mar 13, 2018	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jan 5, 2017	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jan 4, 2017	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Oct 27, 2016	FWP →	MARKETING	Free-writing prospectus — offering being marketed
Oct 27, 2016	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Oct 26, 2016	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Oct 26, 2016	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Aug 11, 2016	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Apr 25, 2016	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Apr 18, 2016	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Apr 7, 2016	S-3/A →	REGISTERED	S-3/A registration — capacity to sell shares, not a sale yet
Mar 11, 2016	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Mar 5, 2015	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Mar 7, 2012	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Mar 7, 2012	FWP →	MARKETING	Free-writing prospectus — offering being marketed
Mar 7, 2012	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Mar 6, 2012	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)

HOS 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 HOS workspace →

HOS offering FAQ

When did HOS last execute an offering?

Per SEC filings, HORNBECK OFFSHORE SERVICES, INC.'s most recent priced offering document is a 8-K filed 2026-09-01. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did HOS last announce or register an offering?

The most recent registration is a S-3ASR filed 2026-09-15. 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.

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