As of November 6, 2026, Transocean Ltd is a publicly traded company (NYSE: RIG). The largest holder reporting an active stake on Schedule 13D is Frederik W. Mohn, at 8.8%. No bankruptcy or receivership appears in its SEC Form 8-K filings (Schedule 13D/A, February 11, 2026).
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Is Transocean Ltd a real, registered company?
- Transocean Ltd files with the SEC under CIK 1451505 (its SEC filings).
- Its shares are listed under the ticker RIG on NYSE (SEC company record).
- Incorporated in V8; business address in Steinhausen, V8, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under Transocean Ltd in our court records and SEC 8-K records (as of 2026-11-06).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Frederik W. Mohn (filed 2026-02-11).
Who are Transocean Ltd's owners and officers?
Transocean Ltd: business address in Steinhausen, V8; industry Drilling Oil & Gas Wells (Schedule 13G/A, 2026-03-27).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-03-27 | The Vanguard Group | 0% |
| Schedule 13D/A, 2026-02-11 | Frederik W. Mohn | 8.8% |
| Schedule 13D/A, 2025-09-30 | Frederik W. Mohn | 10.1% |
| Schedule 13G/A, 2025-08-14 | Primecap Management Co/Ca/ | 1.49% |
Questions about who owns Transocean Ltd
Who owns Transocean Ltd?
On this page, one holder's latest ownership filing reports 5% or more of Transocean Ltd: Frederik W. Mohn (8.8%, Schedule 13D/A, filed 2026-02-11).
When did Frederik W. Mohn buy into Transocean Ltd?
The filings give report dates, not purchase dates. The earliest filing from Frederik W. Mohn on this page is the Schedule 13D/A, filed 2025-09-30, reporting 10.1%; its latest, Schedule 13D/A filed 2026-02-11, reports 8.8%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 4 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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What They Do, And How The Money Works
Who Runs It, And How To Reach Them
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Which insiders own Transocean Ltd shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , a director: 96,653,798 shares (8.7% of shares outstanding), 78,904 held directly and 96,574,894 indirectly (Form 4, 2026-05-27).
- Perestroika, a director: 96,574,894 shares (8.6% of shares outstanding), held indirectly through By Perestroika (Cyprus) Ltd. (Form 4, 2025-11-25).
- Perestroika (Cyprus) Ltd, a director: 96,574,894 shares (8.6% of shares outstanding) (Form 4, 2025-11-25).
- , the chairman and a director: 2,614,548 shares (0.23% of shares outstanding) (Form 4, 2026-03-03).
- , the chief executive and president: 1,600,884 shares (0.14% of shares outstanding) (Form 4, 2026-05-05).
Shares outstanding: 1,116,921,983 as of 2026-10-27, from the company's latest SEC cover page.
How much has Transocean Ltd raised?
No fundraising or offering filing from Transocean Ltd is on file with us.
Keep reading
More on Transocean Ltd and the records around it.
Transocean Ltd elsewhere on the record
- 5%+ stake filings Mar 2026
Companies that share a holder
- PRIMECAP MANAGEMENT CO/CA/ also filed stake reports on 24 other companies: Xencor Inc (Nov 2026), GRAIL, Inc. (Nov 2026), MARKETAXESS HOLDINGS INC (Nov 2026)
- The Vanguard Group also filed stake reports on 2384 other companies: BellRing Brands, Inc. (Sep 2026), CAL-MAINE FOODS INC (Sep 2026), FTAI Aviation Ltd. (Sep 2026)
Related pages
Filings, cases and notices link to their records. A not-found line names the records searched; it is not proof of absence.
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