Latest Period
Q1 2026
Security Snapshot
Transocean Ltd. - Shares, $0.10 par value (RIG) Institutional Ownership
CUSIP: H8817H100
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
533
Shares (Excl. Options)
900,190,376
Price
$6.63
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- Security type / class
- Equity / Shares, $0.10 par value
- Symbol
- RIG on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 900,190,376
- Total 13F value
- $5,965,713,803
- Portfolio coverage rank
- 0.01%
- Share change
- +127,950,809
- Value change
- +$942,213,753
- Number of holders
- 533
- Shares outstanding
- 1,101,344,330
- SEC-reported price per share
- $6.55
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
2 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- RIG - Transocean Ltd. - Shares, $0.10 par value is tracked under CUSIP H8817H100.
- 533 institutions reported positions in Q1 2026.
- 4 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 465 to 533 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $3,187,776,719 to $5,965,713,803.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 533 institutions filings for Q1 2026.
Security key
H8817H100
Latest holder period
Q1 2026
13F holders
533
13D/G owners
4
CIK / CUSIP context first
Open Q1 2026 holders
RIG full holder history
Transocean Ltd. SEC filings
Transocean Ltd. company facts
Transocean Ltd. insider transactions
Transocean Ltd. 13D/G history
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP H8817H100:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
4
Security
RIG
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Mohn Frederik Wilhelm | 8.8% | -13% | $400,272,583 | +$6,195,000 | 96,918,301 | +1.6% | Frederik W. Mohn | 09 Feb 2026 |
| BlackRock, Inc. | 6.4% | $123,458,727 | 56,117,603 | BlackRock, Inc. | 31 Mar 2025 | |||
| Capital World Investors | 4.6% | -15% | $88,489,751 | -$17,683,721 | 40,222,614 | -17% | Capital World Investors | 31 Dec 2024 |
| PRIMECAP MANAGEMENT CO/CA/ | 1.5% | $37,542,425 | 13,126,722 | PRIMECAP MANAGEMENT CO/CA/ | 30 Jun 2025 |
As of 31 Mar 2026, 533 institutional investors reported holding 900,190,376 shares of Transocean Ltd. - Shares, $0.10 par value (RIG). This represents 82% of the company’s total 1,101,344,330 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
60%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 8% | 88,371,248 | +0.26% | 0.01% | $585,901,378 |
| DIMENSIONAL FUND ADVISORS LP | 4.4% | 48,819,576 | +12% | 0.07% | $323,682,016 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 4.3% | 46,862,730 | 0% | 0.02% | $310,699,900 |
| TWO SIGMA INVESTMENTS, LP | 4.2% | 46,463,736 | +92% | 0.26% | $308,054,570 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4% | 44,272,423 | 0% | 0.01% | $293,526,165 |
| D. E. Shaw & Co., Inc. | 3.6% | 39,262,599 | +139% | 0.21% | $260,311,032 |
| Slate Path Capital LP | 2.7% | 30,062,100 | 3% | $199,311,723 | |
| Capital World Investors | 2.7% | 29,575,479 | +89% | 0.03% | $196,085,426 |
| STATE STREET CORP | 2.3% | 24,982,204 | +1% | 0.01% | $165,632,013 |
| PILGRIM GLOBAL ADVISORS LLC | 2.2% | 23,913,120 | -25% | 21% | $158,543,986 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.1% | 23,471,597 | +3% | 0.01% | $155,645,651 |
| AMERICAN CENTURY COMPANIES INC | 2.1% | 22,759,181 | -17% | 0.08% | $150,893,371 |
| MORGAN STANLEY | 2% | 21,693,064 | -12% | 0.01% | $143,825,020 |
| VAN ECK ASSOCIATES CORP | 1.9% | 21,137,129 | +26% | 0.11% | $140,140,000 |
| Dalal Street, LLC | 1.9% | 20,392,672 | -25% | 32% | $135,203,415 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | 1.5% | 16,542,717 | 0.44% | $109,678,214 | |
| MARSHALL WACE, LLP | 1.5% | 16,043,764 | +42120% | 0.11% | $106,370,155 |
| Elliott Investment Management L.P. | 1.4% | 15,626,834 | 0.65% | $103,605,909 | |
| GOLDMAN SACHS GROUP INC | 1.2% | 12,901,382 | -20% | 0.01% | $85,536,163 |
| KEYBANK NATIONAL ASSOCIATION/OH | 1.1% | 12,656,881 | +3.3% | 0.31% | $83,915,123 |
| GENDELL JEFFREY L | 1.1% | 11,700,000 | +8.4% | 1.1% | $77,571,000 |
| FIL Ltd | 1% | 11,240,815 | +58297% | 0.06% | $74,526,603 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.89% | 9,810,858 | -1.9% | 0.01% | $65,045,989 |
| BANK OF AMERICA CORP /DE/ | 0.78% | 8,602,323 | -45% | 0% | $57,033,401 |
| NORTHERN TRUST CORP | 0.74% | 8,142,544 | +3.1% | 0.01% | $53,985,067 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 900,190,376 | $5,965,713,803 | +$942,213,753 | $6.63 | 533 |
| 2025 Q4 | 771,821,666 | $3,187,776,719 | +$151,201,850 | $4.13 | 465 |
| 2025 Q3 | 748,843,862 | $2,336,415,102 | +$470,012,014 | $3.12 | 446 |
| 2025 Q2 | 600,402,432 | $1,555,215,783 | -$26,519,287 | $2.59 | 418 |
| 2025 Q1 | 605,500,336 | $1,919,496,140 | -$14,393,262 | $3.17 | 402 |
| 2024 Q4 | 609,720,063 | $2,286,338,730 | -$10,536,398 | $3.75 | 438 |
| 2024 Q3 | 605,032,090 | $2,570,118,382 | -$18,923,418 | $4.25 | 417 |
| 2024 Q2 | 602,231,084 | $3,223,214,035 | +$276,475,185 | $5.35 | 411 |
| 2024 Q1 | 548,361,294 | $3,443,769,240 | -$5,648,253 | $6.28 | 419 |
| 2023 Q4 | 547,216,208 | $3,474,784,440 | -$36,782,804 | $6.35 | 423 |
| 2023 Q3 | 539,993,633 | $4,431,352,889 | +$218,553,775 | $8.21 | 422 |
| 2023 Q2 | 509,700,039 | $3,572,411,033 | -$102,290,964 | $7.01 | 384 |
| 2023 Q1 | 525,695,763 | $3,343,549,352 | +$400,351,452 | $6.36 | 392 |
| 2022 Q4 | 463,083,127 | $2,111,673,406 | +$316,189,137 | $4.56 | 362 |
| 2022 Q3 | 397,277,077 | $981,353,984 | +$39,402,605 | $2.47 | 285 |
| 2022 Q2 | 381,315,055 | $1,269,865,701 | -$766,289 | $3.33 | 286 |
| 2022 Q1 | 379,347,582 | $1,733,881,945 | +$254,683,979 | $4.57 | 303 |
| 2021 Q4 | 325,364,612 | $898,136,470 | -$3,376,313 | $2.76 | 275 |
| 2021 Q3 | 322,720,420 | $1,222,983,895 | -$78,703,928 | $3.79 | 260 |
| 2021 Q2 | 342,122,590 | $1,546,427,015 | +$60,965,835 | $4.52 | 276 |
| 2021 Q1 | 329,199,307 | $1,168,532,551 | +$119,839,668 | $3.55 | 250 |
| 2020 Q4 | 293,634,044 | $678,350,900 | +$31,015,574 | $2.31 | 223 |
| 2020 Q3 | 294,245,615 | $237,459,540 | -$64,814,605 | $0.81 | 219 |
| 2020 Q2 | 352,989,993 | $645,998,226 | -$87,947,928 | $1.83 | 258 |
| 2020 Q1 | 435,016,463 | $504,398,932 | -$135,837,904 | $1.16 | 275 |