Transocean Ltd. (RIG) Ownership
RIG ownership summary
as of October 18, 2026- Institutions
- 95.9% of shares outstanding
- Insiders
- 9.24% of shares outstanding
- Shares outstanding
- 1.12B
- Float
- 923.6M shares available to trade
- Short interest
- 29.41% 299.0M shares short
- Days to cover
- 6.83 short interest up 12.8% vs prior month
- Institutions 95.93%
- Insiders 9.24%
RIG top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 8.23% | 91.9M | $516.6M | +3.6M (+4.0%) | June 30, 2026 |
| 2 | Dimensional Fund Advisors, Inc. | 4.57% | 51.0M | $286.7M | +2.2M (+4.5%) | June 30, 2026 |
| 3 | Vanguard Portfolio Management, LLC | 4.41% | 49.3M | $277.0M | +2.4M (+5.2%) | June 30, 2026 |
| 4 | Two Sigma Investments LLC | 4.14% | 46.2M | $259.7M | −258,432 (−0.6%) | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 4.05% | 45.2M | $254.0M | +928,171 (+2.1%) | June 30, 2026 |
| 6 | D. E. Shaw & Co LP | 3.74% | 41.8M | $234.9M | +2.5M (+6.4%) | June 30, 2026 |
| 7 | Slate Path Capital LP | 3.34% | 37.3M | $209.4M | +7.2M (+24.0%) | June 30, 2026 |
| 8 | Capital World Investors | 2.77% | 31.0M | $174.1M | +1.4M (+4.7%) | June 30, 2026 |
| 9 | Geode Capital Management, LLC | 2.56% | 28.6M | $160.5M | +5.1M (+21.7%) | June 30, 2026 |
| 10 | State Street Corp | 2.43% | 27.1M | $152.6M | +2.2M (+8.7%) | June 30, 2026 |
| 11 | Morgan Stanley - Brokerage Accounts | 2.39% | 26.7M | $150.0M | +5.0M (+23.0%) | June 30, 2026 |
| 12 | UBS Group AG | 2.36% | 26.4M | $148.2M | +20.3M (+335.7%) | June 30, 2026 |
| 13 | American Century Companies Inc | 2.05% | 22.9M | $128.9M | +179,954 (+0.8%) | June 30, 2026 |
| 14 | Dalal Street LLC | 1.83% | 20.4M | $114.6M | +5,987 (+0.0%) | June 30, 2026 |
| 15 | Van Eck Associates Corporation | 1.77% | 19.8M | $111.2M | −1.3M (−6.4%) | June 30, 2026 |
| 16 | Pilgrim Global Advisors Llc | 1.56% | 17.4M | $97.7M | −6.5M (−27.3%) | June 30, 2026 |
| 17 | The Goldman Sachs Group Inc | 1.50% | 16.8M | $94.4M | +3.9M (+30.2%) | June 30, 2026 |
| 18 | Elliott Investment Management LP | 1.40% | 15.6M | $87.8M | — | June 30, 2026 |
| 19 | Assenagon Asset Management SA | 1.37% | 15.3M | $86.1M | +15.3M (0.0%) | June 30, 2026 |
| 20 | VOLORIDGE INVESTMENT MANAGEMENT, LLC | 1.32% | 14.8M | $83.1M | −1.7M (−10.6%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 15 holders added 72.2M shares and 4 cut 9.9M.
RIG top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.86% | 31.9M | $179.4M | −48,301 (−0.2%) | August 31, 2026 |
| 2 | American Funds SMALLCAP World A | 2.75% | 30.7M | $172.4M | +8.0M (+35.3%) | September 30, 2026 |
| 3 | Avantis US Small Cap Value ETF | 2.37% | 26.5M | $149.0M | +50,064 (+0.2%) | September 30, 2026 |
| 4 | iShares Russell 2000 ETF | 2.29% | 25.5M | $143.6M | −294,464 (−1.1%) | September 30, 2026 |
| 5 | Vanguard Small Cap Index | 2.02% | 22.6M | $127.1M | −520,208 (−2.2%) | September 30, 2026 |
| 6 | VanEck Oil Services ETF | 1.45% | 16.2M | $91.2M | — | September 30, 2026 |
| 7 | DFA US Small Cap Value I | 1.17% | 13.1M | $73.7M | — | August 31, 2026 |
| 8 | Vanguard MStar Small Cap Growth Indx Inv | 1.13% | 12.6M | $70.8M | −673,488 (−5.1%) | September 30, 2026 |
| 9 | Fidelity Small Cap Index | 0.97% | 10.8M | $60.7M | +88,682 (+0.8%) | July 31, 2026 |
| 10 | BlackRock Systematic Multi-Strat Instl | 0.90% | 10.0M | $56.3M | +2.7M (+37.1%) | July 31, 2026 |
| 11 | iShares Russell 2000 Value ETF | 0.83% | 9.3M | $52.0M | +14,034 (+0.2%) | September 30, 2026 |
| 12 | American Funds New Economy A | 0.62% | 7.0M | $39.2M | — | September 30, 2026 |
| 13 | DFA US Targeted Value I | 0.61% | 6.8M | $38.1M | — | August 31, 2026 |
| 14 | Fidelity World A-Dis-EUR | 0.58% | 6.5M | $36.7M | +5,963 (+0.1%) | August 31, 2026 |
| 15 | Dimensional US Targeted Value ETF | 0.53% | 5.9M | $33.1M | +1,346 (+0.0%) | September 30, 2026 |
| 16 | Vanguard Russell 2000 ETF | 0.51% | 5.7M | $32.3M | +64,712 (+1.1%) | September 30, 2026 |
| 17 | Dimensional US Small Cap Value ETF | 0.49% | 5.5M | $30.9M | +2,344 (+0.0%) | September 24, 2026 |
| 18 | Diamond Hill Large Cap Inv | 0.49% | 5.4M | $30.5M | — | September 30, 2026 |
| 19 | Vanguard Energy ETF | 0.48% | 5.4M | $30.4M | −23,874 (−0.4%) | September 30, 2026 |
| 20 | Schwab US Small-Cap ETF™ | 0.48% | 5.3M | $30.1M | +3,618 (+0.1%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
RIG insider transactions
latest 16| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-04 | Roderick James Mackenzie | Sell | $6.36 | 78,370 | $498,433 |
| 2026-01-27 | Keelan Adamson | Sell | $5.00 | 58,687 | $293,435 |
| 2026-01-26 | Keelan Adamson | Sell | $5.00 | 22,846 | $114,230 |
| 2025-12-05 | Keelan Adamson | Sell | $4.50 | 57,968 | $260,856 |
| 2025-12-04 | Keelan Adamson | Sell | $4.50 | 8,469 | $38,110 |
| 2025-12-03 | Roderick James Mackenzie | Sell | $4.48 | 35,000 | $156,800 |
| 2025-11-26 | Jeremy D Thigpen | Sell | $4.32 | 500,000 | $2.2M |
| 2025-11-26 | Robert Thaddeus Vayda | Sell | $4.29 | 30,000 | $128,700 |
| 2025-11-24 | Frederik Wilhelm Mohn | Buy | $4.02 | 1,500,000 | $6.0M |
| 2025-11-24 | Perestroika | Buy | $4.02 | 1,500,000 | $6.0M |
| 2025-10-31 | Roderick James Mackenzie | Sell | $3.86 | 53,769 | $207,548 |
| 2025-10-24 | Keelan Adamson | Sell | $4.00 | 40,942 | $163,768 |
| 2025-09-26 | (Cyprus) Ltd Perestroika | Buy | $3.05 | 4,000,000 | $12.2M |
| 2025-09-26 | Frederik Wilhelm Mohn | Buy | $3.05 | 4,000,000 | $12.2M |
| 2025-05-12 | Roderick James Mackenzie | Sell | $2.78 | 22,000 | $61,160 |
| 2025-04-30 | Vanessa C L Chang | Buy | $2.14 | 10,000 | $21,400 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
RIG shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns RIG
Institutional investors own 95.9% of Transocean's shares and insiders 9.24%. The largest holder is BlackRock Inc with 8.23% of the shares (91.9M), as of June 30, 2026. Among the top 20 institutions, 15 added shares and 4 reduced their stake in the latest filings. Short interest is 29.41% of the float, or 6.83 days of average trading volume. The share count rose 165.2% since 2014.
Related: RIG analyst forecast, RIG key metrics. See the RIG stock overview for the latest quote and news.
RIG ownership FAQ
Who owns the most Transocean stock?
The largest shareholders of Transocean are BlackRock Inc (8.23%), Dimensional Fund Advisors, Inc. (4.57%), Vanguard Portfolio Management, LLC (4.41%), Two Sigma Investments LLC (4.14%), Vanguard Capital Management, LLC (4.05%).
What percentage of Transocean is owned by institutions?
Institutions hold 95.9% of Transocean's shares outstanding; insiders hold 9.24%.
Which funds own Transocean?
The largest fund holders of Transocean are Vanguard MStar Total Stk Mkt Idx Invest (2.86%), American Funds SMALLCAP World A (2.75%), Avantis US Small Cap Value ETF (2.37%), iShares Russell 2000 ETF (2.29%), Vanguard Small Cap Index (2.02%).
What is Transocean's short interest?
299.0M shares of Transocean were sold short, 29.41% of the float; at the average daily volume it would take 6.83 days to cover.
Are insiders buying or selling Transocean?
Of the latest 16 reported insider transactions in Transocean (since April 30, 2025), 5 were purchases and 11 were sales.
How many shares of Transocean are outstanding?
Transocean has 1.12B shares outstanding, of which 923.6M are in the public float.