DIAMOND OFFSHORE ENTERPRISES LIMITED
DIAMOND OFFSHORE ENTERPRISES LIMITED is a Private limited company (Ltd.) registered in United Kingdom under 06747036, and its current status with Companies House is active. The company was incorporated on 11 November 2008 and lists its registered address as Altrincham, United Kingdom. 1 shareholder is on record for DIAMOND OFFSHORE ENTERPRISES LIMITED, and since every one of them is a company rather than an individual, this particular filing does not on its own establish an ultimate beneficial owner (UBO) — identifying one would mean tracing the ownership of each shareholding company in turn. This profile is sourced directly from Companies House and was last updated on 3 October 2026.
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Shareholders
1
One shareholder is currently on record for DIAMOND OFFSHORE ENTERPRISES LIMITED, held on the Confirmation Statement (CS01), filed under the Companies Act 2006.
The largest of these is DIAMOND OFFSHORE INTERNATIONAL LIMITED, holding 100% — a majority holding.
Because the shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
| Shareholder | Type | Holding | Source Document |
|---|---|---|---|
| DIAMOND OFFSHORE INTERNATIONAL LIMITED | 100% | Companies House |
Officers
3
Three officers are currently on record for DIAMOND OFFSHORE ENTERPRISES LIMITED, filed with Companies House. Carolyn Cosgrove (appointed 2024-09-04) and Bruce Boyle (appointed 2024-09-04) both serve as Director; Carolyn Cosgrove (appointed 2024-12-18) serves as Company Secretary.
The register reports 25 officers in total, including past appointments, though only the 3 most relevant records are shown here.
Management authority at DIAMOND OFFSHORE ENTERPRISES LIMITED sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
The source filing doesn't specify representation authority — whether officers can act individually or must sign jointly to bind the company — so that detail isn't available here.
Group Structure
DIAMOND OFFSHORE ENTERPRISES LIMITED sits 4 levels below its ultimate parent, The Depository Trust & Clearing Corporation, registered in United States. 1 subsidiary is recorded beneath it, across 1 jurisdiction. Immediately above DIAMOND OFFSHORE ENTERPRISES LIMITED is Diamond Offshore International Limited, holding 100% as filed in DIAMOND OFFSHORE ENTERPRISES LIMITED's own shareholder record with Companies House. The Depository Trust & Clearing Corporation sits further up the chain, a link derived by walking shareholder filings across jurisdictions rather than stated in a single document. Each of these downward relationships is derived rather than filed: resolved by matching entities across the registry network, not stated directly in a single document.
Those 1 subsidiary spans United Kingdom jurisdiction, though this list should not be read as complete — subsidiaries only become visible here where shareholder data has actually been filed with a register, so holdings in jurisdictions without that filing simply won't appear.
The Depository Trust & Clearing Corporation
United States
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Frequently Asked Questions
Who owns DIAMOND OFFSHORE ENTERPRISES LIMITED?
One shareholder is currently on record for DIAMOND OFFSHORE ENTERPRISES LIMITED, held on the Confirmation Statement (CS01), filed under the Companies Act 2006. The largest of these is DIAMOND OFFSHORE INTERNATIONAL LIMITED, holding 100% — a majority holding. Because the shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
Who is DIAMOND OFFSHORE ENTERPRISES LIMITED's UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for DIAMOND OFFSHORE ENTERPRISES LIMITED is itself a company rather than a natural person, so no Ultimate Beneficial Owner (UBO) is identified at this level; establishing one would require tracing the ownership of each shareholding company in turn.
How many shareholders does DIAMOND OFFSHORE ENTERPRISES LIMITED have on record?
1 shareholder is shown on record for DIAMOND OFFSHORE ENTERPRISES LIMITED.
What is DIAMOND OFFSHORE ENTERPRISES LIMITED's company registration number?
DIAMOND OFFSHORE ENTERPRISES LIMITED's registration number is 06747036, filed with Companies House in United Kingdom. Its current status on the register is active.
Is DIAMOND OFFSHORE ENTERPRISES LIMITED still an active company?
DIAMOND OFFSHORE ENTERPRISES LIMITED's status on Companies House is listed as active.
When was DIAMOND OFFSHORE ENTERPRISES LIMITED incorporated?
DIAMOND OFFSHORE ENTERPRISES LIMITED was incorporated on 11 November 2008, according to Companies House.
What is DIAMOND OFFSHORE ENTERPRISES LIMITED's registered address?
The registered address on file for DIAMOND OFFSHORE ENTERPRISES LIMITED is Altrincham, United Kingdom.
What legal structure is DIAMOND OFFSHORE ENTERPRISES LIMITED registered as?
DIAMOND OFFSHORE ENTERPRISES LIMITED is registered as a Private limited company (Ltd.) in United Kingdom.
Who are the officers/directors of DIAMOND OFFSHORE ENTERPRISES LIMITED?
Three officers are currently on record for DIAMOND OFFSHORE ENTERPRISES LIMITED, filed with Companies House. Carolyn Cosgrove (appointed 2024-09-04) and Bruce Boyle (appointed 2024-09-04) both serve as Director; Carolyn Cosgrove (appointed 2024-12-18) serves as Company Secretary. Management authority at DIAMOND OFFSHORE ENTERPRISES LIMITED sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does DIAMOND OFFSHORE ENTERPRISES LIMITED have a parent company or subsidiaries?
DIAMOND OFFSHORE ENTERPRISES LIMITED sits 4 levels below its ultimate parent, The Depository Trust & Clearing Corporation, registered in United States. 1 subsidiary is recorded beneath it, across 1 jurisdiction. Those 1 subsidiary spans United Kingdom jurisdiction, though this list should not be read as complete — subsidiaries only become visible here where shareholder data has actually been filed with a register, so holdings in jurisdictions without that filing simply won't appear.
Can Zavia monitor changes to DIAMOND OFFSHORE ENTERPRISES LIMITED's ownership over time?
This profile reflects a point-in-time snapshot from Companies House. Zavia's monitoring API can track changes to DIAMOND OFFSHORE ENTERPRISES LIMITED's registered shareholders, officers, and group structure going forward, flagging updates as they're filed rather than requiring a manual recheck.
Can I access DIAMOND OFFSHORE ENTERPRISES LIMITED's data through an API?
Yes. Zavia's API connects directly to official government ownership registries across 195 countries and territories, including United Kingdom, so records like DIAMOND OFFSHORE ENTERPRISES LIMITED's registration, shareholder, UBO, and group-structure data can be queried programmatically instead of viewed one page at a time.
Where does this company information come from, and how current is it?
This record is sourced directly from Companies House and was last synced on 3 October 2026.