Transocean Ltd.
CH ˙ BRSE ˙ CH0048265513
SecurityCH:RIGN / Transocean Ltd.
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership3,786 shares
Latest Disclosed Value $ 15,636
Parallel Advisors, LLC ownership in RIGN / Transocean Ltd.

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 3,786 shares of Transocean Ltd. (CH:RIGN) valued at $15,636 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 3,507 shares of Transocean Ltd.. This represents a change in shares of 7.96% during the quarter.

Parallel Advisors, LLC has a history of taking positions in derivatives of the underlying security (RIGN) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

CH:RIGN / Transocean Ltd. Historical Put/Call Ratio
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)
2026-02-11 2025-12-31 13F TRANSOCEAN Stock H8817H100 3,786 279 7.96 16 50.00 0.0003
2025-11-13 2025-09-30 13F TRANSOCEAN Stock H8817H100 3,507 329 10.35 11 25.00 0.0002
2025-07-08 2025-06-30 13F TRANSOCEAN Stock H8817H100 3,178 -5,632 -63.93 8 -70.37 0.0002
2025-04-08 2025-03-31 13F TRANSOCEAN Stock H8817H100 8,810 5,353 154.85 28 125.00 0.0006
2025-02-10 2024-12-31 13F TRANSOCEAN Stock H8817H100 3,457 2,241 184.29 13 140.00 0.0003
2024-11-13 2024-09-30 13F TRANSOCEAN Stock H8817H100 1,216 -1,878 -60.70 5 -68.75 0.0001
2024-08-08 2024-06-30 13F TRANSOCEAN Stock H8817H100 3,094 452 17.11 17 0.00 0.0004
2024-05-06 2024-03-31 13F TRANSOCEAN Stock H8817H100 2,642 0 0.00 17 0.00 0.0004
2024-02-12 2023-12-31 13F TRANSOCEAN Stock H8817H100 2,642 -763 -22.41 17 -40.74 0.0005
2024-05-20 2023-09-30 13F/A-1 TRANSOCEAN Stock H8817H100 3,405 247 7.82 28 22.73 0.0009
2023-11-14 2023-09-30 13F TRANSOCEAN Stock H8817H100 3,405 247 28 0.0009
2024-05-20 2023-06-30 13F/A-1 TRANSOCEAN Stock H8817H100 3,158 0 0.00 22 10.00 0.0007
2023-08-04 2023-06-30 13F TRANSOCEAN Stock H8817H100 3,158 0 22 0.0007
2024-05-20 2023-03-31 13F/A-1 TRANSOCEAN Stock H8817H100 3,158 2,400 316.62 20 566.67 0.0007
2023-04-25 2023-03-31 13F TRANSOCEAN Stock H8817H100 3,158 2,400 20 0.0007
2023-02-06 2022-12-31 13F TRANSOCEAN Stock H8817H100 758 558 279.00 3 0.0001
2022-11-10 2022-09-30 13F TRANSOCEAN Stock H8817H100 200 0 0.00 0 -100.00
2022-08-01 2022-06-30 13F TRANSOCEAN Stock H8817H100 200 0 0.00 1 0.00 0.0000
2022-04-28 2022-03-31 13F TRANSOCEAN Stock H8817H100 200 0 0.00 1 0.00 0.0000
2022-01-20 2021-12-31 13F TRANSOCEAN Stock H8817H100 200 0 0.00 1 0.00 0.0000
2021-11-02 2021-09-30 13F/A-1 TRANSOCEAN Stock H8817H100 200 0 0.00 1 0.00 0.0000
2021-08-06 2021-06-30 13F TRANSOCEAN Stock H8817H100 200 -2,000 -90.91 1 -87.50 0.0000
2021-04-23 2021-03-31 13F TRANSOCEAN Stock H8817H100 2,200 0 0.00 8 60.00 0.0004
2021-02-02 2020-12-31 13F TRANSOCEAN Stock H8817H100 2,200 -5,714 -72.20 5 -16.67 0.0003
2020-10-27 2020-09-30 13F TRANSOCEAN Stock H8817H100 7,914 -1,348 -14.55 6 -62.50 0.0004
2020-07-16 2020-06-30 13F TRANSOCEAN Stock H8817H100 9,262 -140 -1.49 16 60.00 0.0010
2020-04-27 2020-03-31 13F TRANSOCEAN Stock H8817H100 9,402 41 0.44 10 -84.37 0.0008
2020-01-30 2019-12-31 13F TRANSOCEAN Stock H8817H100 9,361 -2,452 -20.76 64 20.75 0.0048
2019-11-01 2019-09-30 13F TRANSOCEAN Stock H8817H100 11,813 11,364 2,530.96 53 1,666.67 0.0045
2019-08-05 2019-06-30 13F TRANSOCEAN Stock H8817H100 449 -1,525 -77.25 3 -82.35 0.0003
2019-05-01 2019-03-31 13F TRANSOCEAN Stock H8817H100 1,974 1,974 17 0.0019
2017-11-15 2017-09-30 13F/A-1 TRANSOCEAN LTD REG SHS Stock H8817H100 0 -51 -100.00 0 0.0000
2017-08-07 2017-06-30 13F TRANSOCEAN LTD REG SHS Stock H8817H100 51 51 0 0.0000
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2022-01-19 2021-12-31 13F TRANSOCEAN Stock Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-10-22 2021-09-30 13F TRANSOCEAN Stock Call 200 1 n/a n/a n/a
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.