Transocean Ltd.
RIG- Exchange
- NYSE
- Industry
- Drilling Oil & Gas Wells
- SEC CIK
- 0001451505
In the last 90 days, Transocean Ltd. insiders filed 1 open-market purchase and 0 sales; 539 institutions reported holding it in 13F filings for Q2 2026, worth $4.88B in total; superinvestors Pabrai Investment Funds and Elliott Investment Management hold it.
Holders of 5% or more of RIG
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Transocean Ltd., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Mohn Frederik Wilhelm | 13D/A | 8.80%96.9M shares | −1.30 ppfrom 10.10% | Sep 30, 20252 filings | Feb 11, 2026 | SEC |
| BlackRock, Inc. | 13G/A | 6.40%56.1M shares | – | Apr 23, 20251 filing | Apr 23, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
7 Schedule 13D and 13G filings on Transocean Ltd., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 27, 20261:36 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Feb 11, 20269:25 PM ET | Mohn Frederik Wilhelmand 2 others | 13D/A | 8.80%96.9M shares | −1.30 ppfrom 10.10% | Feb 9, 2026 | SEC |
| Sep 30, 20259:38 PM ET | Mohn Frederik Wilhelmand 2 others | 13D/A | 10.10%95.4M shares | – | Sep 30, 2025 | SEC |
| Aug 14, 20251:11 PM ET | Primecap Management Co | 13G/A | 1.49%13.1M shares | –Below 5% | Jun 30, 2025 | SEC |
| Apr 23, 20257:39 PM ET | BlackRock, Inc. | 13G/A | 6.40%56.1M shares | – | Mar 31, 2025 | SEC |
| Feb 13, 20254:53 PM ET | Capital World Investors | 13G/A | 4.60%40.2M shares | −0.90 ppfrom 5.50%Below 5% | Dec 31, 2024 | SEC |
| Nov 13, 202412:42 PM ET | Capital World Investors | 13G | 5.50%48.3M shares | New | Sep 30, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Transocean Ltd. shares.
No Form 144 notices for Transocean Ltd. are on file.