Transocean Ltd
Ownership
Ownership Structure
Who owns Transocean Ltd (RIG)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 82.7% of the shares are freely tradable; institutional investors hold 85.8%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 7.91 | 88,371,248 | +0.3 | 03/31/2026 |
| Dimensional Fund Advisors, Inc. | 4.57 | 51,009,878 | +4.5 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 4.20 | 46,862,730 | +0.0 | 03/31/2026 |
| Two Sigma Investments LLC | 4.14 | 46,205,304 | -0.6 | 06/30/2026 |
| Vanguard Capital Management, LLC | 3.96 | 44,272,423 | +0.0 | 03/31/2026 |
| D. E. Shaw & Co LP | 3.74 | 41,793,600 | +6.4 | 06/30/2026 |
| Slate Path Capital LP | 3.34 | 37,266,300 | +24.0 | 06/30/2026 |
| Capital World Investors | 2.77 | 30,973,850 | +4.7 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.86 | 31,969,914 | +0.4 | 07/31/2026 |
| Avantis US Small Cap Value ETF | 2.25 | 25,117,107 | +0.1 | 08/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.