Transocean Ltd.
US ˙ NYSE ˙ CH0048265513

SecurityRIG / Transocean Ltd.
InstitutionStifel Financial Corp
Latest Disclosed Ownership73,095 shares
Latest Disclosed Value $ 484,620
Stifel Financial Corp reports 9.26% increase in ownership of RIG / Transocean Ltd.

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 73,095 shares of Transocean Ltd. (US:RIG) valued at $484,620 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 66,902 shares of Transocean Ltd.. This represents a change in shares of 9.26% during the quarter. The current value of the position is $457,209 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-12 2026-03-31 13F TRANSOCEAN REGISTERED SHS H8817H100 73,095 6,193 9.26 485 75.36 0.0001
2026-02-13 2025-12-31 13F TRANSOCEAN REGISTERED SHS H8817H100 66,902 -131,385 -66.26 276 -55.34 0.0002
2025-11-12 2025-09-30 13F TRANSOCEAN REGISTERED SHS H8817H100 198,287 9,531 5.05 619 26.64 0.0006
2025-08-14 2025-06-30 13F TRANSOCEAN REGISTERED SHS H8817H100 188,756 26,224 16.13 489 -5.24 0.0005
2025-05-14 2025-03-31 13F TRANSOCEAN REGISTERED SHS H8817H100 162,532 12,885 8.61 515 -8.20 0.0005
2025-02-13 2024-12-31 13F TRANSOCEAN REGISTERED SHS H8817H100 149,647 -2,502 -1.64 561 -13.16 0.0006
2024-11-14 2024-09-30 13F TRANSOCEAN REGISTERED SHS H8817H100 152,149 5,636 3.85 647 -17.50 0.0007
2024-08-13 2024-06-30 13F TRANSOCEAN REGISTERED SHS H8817H100 146,513 1,499 1.03 784 -13.96 0.0009
2024-05-14 2024-03-31 13F TRANSOCEAN REGISTERED SHS H8817H100 145,014 -102 -0.07 911 -1.19 0.0010
2024-02-12 2023-12-31 13F TRANSOCEAN REG SHS H8817H100 145,116 -313,401 -68.35 921 -75.53 0.0012
2023-11-13 2023-09-30 13F TRANSOCEAN REG SHS H8817H100 458,517 -81,012 -15.02 3,764 -0.48 0.0053
2023-08-14 2023-06-30 13F TRANSOCEAN REG SHS H8817H100 539,529 408,767 312.60 3,782 355.11 0.0052
2023-05-12 2023-03-31 13F TRANSOCEAN REG SHS H8817H100 130,762 -6,096 -4.45 832 33.17 0.0012
2023-02-13 2022-12-31 13F TRANSOCEAN REG SHS H8817H100 136,858 2,350 1.75 624 87.95 0.0009
2022-11-14 2022-09-30 13F TRANSOCEAN REG SHS H8817H100 134,508 22,481 20.07 332 -10.99 0.0005
2022-08-15 2022-06-30 13F TRANSOCEAN REG SHS H8817H100 112,027 -900 -0.80 373 -27.85 0.0006
2022-05-13 2022-03-31 13F TRANSOCEAN REG SHS H8817H100 112,927 3,840 3.52 517 71.76 0.0007
2022-02-14 2021-12-31 13F TRANSOCEAN REG SHS H8817H100 109,087 -6,050 -5.25 301 -31.12 0.0004
2021-11-15 2021-09-30 13F TRANSOCEAN REG SHS H8817H100 115,137 5,460 4.98 437 -11.90 0.0006
2021-08-13 2021-06-30 13F TRANSOCEAN REG SHS H8817H100 109,677 873 0.80 496 28.17 0.0007
2021-05-14 2021-03-31 13F TRANSOCEAN REG SHS H8817H100 108,804 -137,789 -55.88 387 -31.99 0.0006
2021-02-12 2020-12-31 13F TRANSOCEAN REG SHS H8817H100 246,593 -103,726 -29.61 569 101.06 0.0010
2020-11-16 2020-09-30 13F TRANSOCEAN REG SHS H8817H100 350,319 -10,538 -2.92 283 -57.12 0.0006
2020-08-14 2020-06-30 13F TRANSOCEAN REG SHS H8817H100 360,857 -5,421 -1.48 660 64.18 0.0015
2020-05-14 2020-03-31 13F TRANSOCEAN REG SHS H8817H100 366,278 14,445 4.11 402 -83.45 0.0011
2020-02-13 2019-12-31 13F TRANSOCEAN REG SHS H8817H100 351,833 -46,352 -11.64 2,429 38.64 0.0051
2019-11-19 2019-09-30 13F/A-1 TRANSOCEAN REG SHS H8817H100 398,185 82,981 26.33 1,752 -13.69 0.0045
2019-11-13 2019-09-30 13F TRANSOCEAN REG SHS H8817H100 398,185 82,981 1,752 982.0838
2019-08-14 2019-06-30 13F TRANSOCEAN REG SHS H8817H100 315,204 46,163 17.16 2,030 -13.28 0.0052
2019-05-14 2019-03-31 13F TRANSOCEAN REG SHS H8817H100 269,041 84,694 45.94 2,341 83.18 0.0066
2019-02-13 2018-12-31 13F TRANSOCEAN REG SHS H8817H100 184,347 14,245 8.37 1,278 -45.96 0.0041
2018-11-13 2018-09-30 13F TRANSOCEAN REG SHS H8817H100 170,102 8,408 5.20 2,365 9.64 0.0068
2018-08-14 2018-06-30 13F TRANSOCEAN REG SHS H8817H100 161,694 31,627 24.32 2,157 66.56 0.0066
2018-05-11 2018-03-31 13F TRANSOCEAN REG SHS H8817H100 130,067 45,567 53.93 1,295 45.51 0.0041
2018-02-14 2017-12-31 13F TRANSOCEAN REG SHS H8817H100 84,500 -8,394 -9.04 890 -10.55 0.0028
2017-11-13 2017-09-30 13F TRANSOCEAN REG SHS H8817H100 92,894 11,376 13.96 995 49.85 0.0035
2017-08-14 2017-06-30 13F TRANSOCEAN REG SHS H8817H100 81,518 410 0.51 664 -33.00 0.0025
2017-05-10 2017-03-31 13F TRANSOCEAN REG SHS H8817H100 81,108 15,018 22.72 991 4.54 0.0038
2017-02-16 2016-12-31 13F TRANSOCEAN REG SHS H8817H100 66,090 -6,859 -9.40 948 24.08 0.0040
2016-11-15 2016-09-30 13F TRANSOCEAN REG SHS H8817H100 72,949 2,537 3.60 764 -8.83 0.0034
2016-08-17 2016-06-30 13F TRANSOCEAN REG SHS H8817H100 70,412 -34,677 -33.00 838 -12.80 0.0039
2016-05-16 2016-03-31 13F TRANSOCEAN REG SHS H8817H100 105,089 -40,271 -27.70 961 -46.58 0.0051
2016-03-21 2015-12-31 13F/A-2 TRANSOCEAN REG SHS H8817H100 145,360 -66,263 -31.31 1,799 -34.22 0.0094
2016-02-26 2015-12-31 13F/A-1 TRANSOCEAN REG SHS H8817H100 147,701 2,341 1,828 0.0096
2016-02-16 2015-12-31 13F TRANSOCEAN REG SHS H8817H100 149,927 4,667
2015-11-16 2015-09-30 13F TRANSOCEAN REG SHS H8817H100 211,623 -78,971 -27.18 2,735 -41.61 0.0154
2015-08-17 2015-06-30 13F/A-1 TRANSOCEAN REG SHS H8817H100 290,594 137,173 89.41 4,684 108.09 0.0242
2015-08-17 2015-06-30 13F TRANSOCEAN REG SHS H8817H100 290,594 4,684
2015-05-14 2015-03-31 13F TRANSOCEAN REG SHS H8817H100 153,421 -2,628 -1.68 2,251 -21.29 0.0123
2015-02-13 2014-12-31 13F TRANSOCEAN REG SHS H8817H100 156,049 -134,283 -46.25 2,860 -69.19 0.0159
2014-11-13 2014-09-30 13F TRANSOCEAN REG SHS H8817H100 290,332 134,907 86.80 9,282 32.62 0.0815
2014-08-14 2014-06-30 13F TRANSOCEAN REG SHS H8817H100 155,425 27,729 21.71 6,999 32.58 0.0629
2014-05-15 2014-03-31 13F TRANSOCEAN REG SHS H8817H100 127,696 127,696 5,279 0.0505
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.