Transocean Ltd.
US ˙ NYSE ˙ CH0048265513

SecurityRIG / Transocean Ltd.
InstitutionBallentine Partners, LLC
Latest Disclosed Ownership181,565 shares
Latest Disclosed Value $ 1,203,776
Ballentine Partners, LLC reports 805.47% increase in ownership of RIG / Transocean Ltd.

On May 14, 2026 - Ballentine Partners, LLC filed a 13F-HR form disclosing ownership of 181,565 shares of Transocean Ltd. (US:RIG) valued at $1,203,776 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 20,052 shares of Transocean Ltd.. This represents a change in shares of 805.47% during the quarter. The current value of the position is $1,080,312 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)
2026-05-14 2026-03-31 13F TRANSOCEAN REGISTERED SHS H8817H100 181,565 161,513 805.47 1,204 1,367.07 0.0117
2026-02-03 2025-12-31 13F TRANSOCEAN REGISTERED SHS H8817H100 20,052 700 3.62 83 36.67 0.0012
2025-11-03 2025-09-30 13F TRANSOCEAN REGISTERED SHS H8817H100 19,352 208 1.09 60 22.45 0.0008
2025-07-15 2025-06-30 13F TRANSOCEAN REGISTERED SHS H8817H100 19,144 642 3.47 50 -15.52 0.0007
2025-05-01 2025-03-31 13F TRANSOCEAN REGISTERED SHS H8817H100 18,502 255 1.40 59 -14.71 0.0010
2025-01-16 2024-12-31 13F TRANSOCEAN REGISTERED SHS H8817H100 18,247 2,963 19.39 68 6.25 0.0012
2024-10-23 2024-09-30 13F TRANSOCEAN REGISTERED SHS H8817H100 15,284 -254 -1.63 65 -22.89 0.0011
2024-08-06 2024-06-30 13F TRANSOCEAN REGISTERED SHS H8817H100 15,538 -432 -2.71 83 -17.00 0.0015
2024-04-11 2024-03-31 13F TRANSOCEAN REGISTERED SHS H8817H100 15,970 261 1.66 100 1.01 0.0019
2024-01-23 2023-12-31 13F TRANSOCEAN REG SHS H8817H100 15,709 -238 -1.49 100 -23.85 0.0020
2023-10-19 2023-09-30 13F TRANSOCEAN REG SHS H8817H100 15,947 238 1.52 131 18.18 0.0031
2023-07-26 2023-06-30 13F TRANSOCEAN REG SHS H8817H100 15,709 -369 -2.30 110 7.84 0.0025
2023-04-27 2023-03-31 13F TRANSOCEAN REG SHS H8817H100 16,078 321 2.04 102 43.66 0.0026
2023-01-27 2022-12-31 13F TRANSOCEAN REG SHS H8817H100 15,757 571 3.76 72 86.84 0.0021
2022-10-26 2022-09-30 13F TRANSOCEAN REG SHS H8817H100 15,186 369 2.49 38 -22.45 0.0013
2022-08-09 2022-06-30 13F TRANSOCEAN REG SHS H8817H100 14,817 842 6.03 49 25.64 0.0017
2022-02-14 2021-12-31 13F TRANSOCEAN REG SHS H8817H100 13,975 13,975 39 0.0012
2020-07-31 2020-06-30 13F TRANSOCEAN REG SHS H8817H100 0 -11,649 -100.00 0 -100.00
2020-04-23 2020-03-31 13F TRANSOCEAN REG SHS H8817H100 11,649 -1,417 -10.84 14 -84.44 0.0008
2020-01-22 2019-12-31 13F TRANSOCEAN REG SHS H8817H100 13,066 2,444 23.01 90 87.50 0.0041
2019-10-21 2019-09-30 13F TRANSOCEAN REG SHS H8817H100 10,622 10,622 48 0.0023
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.