| SC 13G/A | 2019-02-14 | CANYON CAPITAL ADVISORS LLC | Transocean Ltd. | 10 | 12.0% | EDGAR |
| SC 13G/A | 2019-02-12 | VANGUARD GROUP INC | Transocean Ltd. | 48,849,557 | 8.0% | EDGAR |
| SC 13G/A | 2019-02-08 | PRIMECAP MANAGEMENT CO/CA/ | Transocean Ltd. | 33,891,839 | 5.6% | EDGAR |
| SC 13G/A | 2019-01-11 | BlackRock Inc. | Transocean Ltd. | 46,560,580 | 10.1% | EDGAR |
| SC 13G/A | 2019-01-10 | BlackRock Inc. | Transocean Ltd. | 46,560,579 | 10.1% | EDGAR |
| SC 13G | 2018-12-12 | Asia Research & Capital Management Ltd | Transocean Ltd. | 27,231,054 | 4.4% | EDGAR |
| SC 13D/A | 2018-09-04 | Perestroika | Transocean Ltd. | 67,740,289 | - | EDGAR |
| SC 13G | 2018-08-07 | PRIMECAP MANAGEMENT CO/CA/ | Transocean Ltd. | 24,761,545 | 5.4% | EDGAR |
| SC 13D/A | 2018-07-03 | Perestroika | Transocean Ltd. | 67,740,289 | - | EDGAR |
| SC 13D/A | 2018-06-18 | Perestroika | Transocean Ltd. | 67,740,289 | - | EDGAR |
| SC 13G/A | 2018-02-13 | STATE STREET CORP | Transocean Ltd. | - | 3.3% | EDGAR |
| SC 13G/A | 2018-02-08 | VANGUARD GROUP INC | Transocean Ltd. | 33,344,970 | 8.5% | EDGAR |
| SC 13G | 2018-02-08 | Asia Research & Capital Management Ltd | Transocean Ltd. | 47,996,841 | 9.8% | EDGAR |
| SC 13D | 2018-02-05 | Perestroika | Transocean Ltd. | 65,740,289 | - | EDGAR |
| SC 13G/A | 2018-01-30 | BlackRock Inc. | Transocean Ltd. | 35,420,304 | 9.1% | EDGAR |
| SC 13G/A | 2017-02-10 | VANGUARD GROUP INC | Transocean Ltd. | 39,971,930 | 10.3% | EDGAR |
| SC 13G | 2017-02-10 | STATE STREET CORP | Transocean Ltd. | - | 5.1% | EDGAR |
| SC 13G | 2017-01-30 | BlackRock Inc. | Transocean Ltd. | 22,962,443 | 5.9% | EDGAR |
| SC 13D/A | 2016-09-28 | ICAHN CARL C | Transocean Ltd. | 1,095,579 | 0.3% | EDGAR |
| SC 13G/A | 2016-04-08 | BlackRock Inc. | Transocean Ltd. | 13,028,545 | 3.6% | EDGAR |