Offerings // Transocean Ltd.

RIG offering history

Every offering-related filing in Transocean Ltd.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 1,006 filings back to Feb 16, 2016.

Last executed offering

May 26, 2026

8-K — priced deal (shares or notes)

Last registration (announced)

Jul 1, 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
May 26, 2026	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Sep 26, 2025	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Sep 24, 2025	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Aug 19, 2025	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Aug 11, 2025	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Jul 22, 2025	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Jul 7, 2025	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Jun 20, 2025	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Jun 3, 2025	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Jul 1, 2024	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Jun 28, 2024	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Jun 28, 2024	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Mar 6, 2024	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Oct 10, 2023	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Sep 29, 2023	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Sep 14, 2023	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Sep 1, 2023	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Apr 10, 2023	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Sep 30, 2022	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Sep 13, 2022	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Aug 5, 2022	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Mar 16, 2022	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Jun 14, 2021	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Jun 14, 2021	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Apr 7, 2021	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Feb 26, 2021	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Sep 4, 2020	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Aug 14, 2020	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
May 11, 2020	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Oct 16, 2018	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Oct 16, 2018	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Jul 11, 2018	424B7 →	UPDATE	Resale prospectus — existing holders registering to sell
Mar 8, 2018	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Feb 21, 2018	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Feb 20, 2018	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Feb 6, 2018	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Feb 6, 2018	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Jan 30, 2018	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Dec 26, 2017	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Dec 22, 2017	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin

RIG 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 RIG workspace →

RIG offering FAQ

When did RIG last execute an offering?

Per SEC filings, Transocean Ltd.'s most recent priced offering document is a 8-K filed 2026-05-26. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did RIG last announce or register an offering?

The most recent registration is a S-3ASR filed 2024-07-01. 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.