TRANSOCEAN DRILLING U.K. LIMITED

1. TRANSOCEAN DRILLING U.K. LIMITED 2008-04-28 → present
2. GLOBALSANTAFE DRILLING U.K. LIMITED 2001-11-21 → 2008-04-28
3. GLOBAL MARINE U.K. LIMITED 1991-04-22 → 2001-11-21
4. PEROLD LIMITED 1991-04-18 → 1991-04-22

Values shown as filed in the company's annual accounts. — indicates the figure wasn't present under that line item in that period. About these numbers

Margins divide P&L lines by turnover. Gearing is liabilities over total assets. Current ratio is current assets over creditors falling due within one year. Interest cover is operating profit over absolute finance costs. Sector-distribution context coming next.

Accounting basis

FRS 101

Reporting scope

Standalone (parent only)

Auditor

Ernst & Young LLP

Audit opinion

Unqualified (clean)

Going concern

Affirmed

“The directors have obtained confirmation from an appropriate parent undertaking, Transocean International Limited (formerly known as Transocean Inc.), that it will provide financial support to allow the company to meet its liabilities as and when they fall due, to the extent that the company is not able to meet such liabilities; and to recover in full sums due to it, when so due, from other group undertakings. This support is provided for a period of twelve months after the financial statements have been approved. The directors have made enquiries to determine the ability of the parent undertaking to provide this support. The directors continue to place reliance on the Parent company's letter of support and concluded that it was appropriate for the financial statements to be prepared on a going concern basis. The financial statements do not reflect any adjustments that would require to be made if they were prepared on a basis other than going concern.”

Group structure

1. TRANSOCEAN DRILLING U.K. LIMITED · parent
   1. Transocean Onshore Support Services Limited 100% · Scotland · Provision of shore based services to UK affiliated companies
   2. Arcade Drilling AS 100% · Norway · Non Trading

Significant events

• “The Paul B. Loyd Jr was sold to Dolphin Drilling Ltd in February 2024.”
• “The Henry Goodrich remained cold stacked in Canada throughout 2024.”
• “In 2023 the Company made 15.7% equity investment in Global Sea Mineral Resources NV (together with its subsidiaries, "GSR"), a Belgian company and leading developer of nodule collection technology, which is engaged in the development and exploration of deep-sea polymetallic nodules that contain metals critical to the growing renewable energy market.”
• “On 27 August 2025, the company announced that it intends to dispose of the Henry Goodrich rig along with certain assets primarily associated with the rig. From this date the assets will be reclassified as Assets Held for Sale.”

Auditor, going-concern and subsidiary information is drawn from the narrative of the latest annual accounts. About these numbers

Filings

5

last 12 months

Capital events

0

last 24 months

Officers appointed

1

last 12 months

Officers resigned

1

last 12 months

Direct counts from the register. No score, no rating — see the Filing timeline for the underlying events.

• Turnover

  -93.1%

  £72,628,614 → £4,979,244

• Cash

  +56.8%

  £810,230 → £1,270,571

• Net assets

  -4.9%

  £114,681,245 → £109,113,417

• Employees

  -33.3%

  3 → 2

• Operating profit

  -102.6%

  £11,194,218 → -£289,103

• Profit before tax

  -144%

  £12,363,973 → -£5,444,033

• Wages

  -7.4%

  £522,609 → £484,062

Each % is (latest − prior) ÷ |prior| for the line item as filed. The comparison is only shown when the latest and prior accounts cover broadly equal-length periods — short or long stubs (typical around incorporation or a year-end change) are suppressed rather than misrepresented. Lines a company doesn't report are omitted. About these numbers