IRON MOUNTAIN IRELAND HOLDINGS LIMITED
Registration details
Company overview
IRON MOUNTAIN IRELAND HOLDINGS LIMITED is a Private limited company (Ltd.) registered in Ireland under IE289489, and its current status with Companies Registration Office (CRO) is active. The company was incorporated on 1 July 1998 and lists its registered address as DAMASTOWN DUBLIN 15, Ireland. 1 shareholder is on record for IRON MOUNTAIN IRELAND HOLDINGS 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 Registration Office (CRO) and was last updated on 27 October 2026.
Officers
5
Registry notes and limitations
The Director of IRON MOUNTAIN IRELAND HOLDINGS LIMITED currently on record is DENIS COLMAN CRONIN; five officers are currently on record for IRON MOUNTAIN IRELAND HOLDINGS LIMITED, filed with Companies Registration Office (CRO).
The register reports 23 officers in total, including past appointments, though only the 5 most relevant records are shown here.
Management authority at IRON MOUNTAIN IRELAND HOLDINGS 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
Iron Mountain Incorporated
United States
How these relationships were recorded
IRON MOUNTAIN IRELAND HOLDINGS LIMITED sits 5 levels below its ultimate parent, Iron Mountain Incorporated, registered in United States. 1 subsidiary is recorded beneath it, across 1 jurisdiction. Immediately above IRON MOUNTAIN IRELAND HOLDINGS LIMITED is BRITANNIA DATA MANAGEMENT LIMITED, holding 100% as filed in IRON MOUNTAIN IRELAND HOLDINGS LIMITED's own shareholder record with Companies Registration Office (CRO). Iron Mountain Incorporated 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 Ireland 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.
Frequently asked questions
Who owns IRON MOUNTAIN IRELAND HOLDINGS LIMITED?
One shareholder is currently on record for IRON MOUNTAIN IRELAND HOLDINGS LIMITED, held on the Annual Return (Form B1) under section 342 of the Companies Act 2014, which the register supplies only on payment. The largest of these is BRITANNIA DATA MANAGEMENT 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 IRON MOUNTAIN IRELAND HOLDINGS LIMITED's UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for IRON MOUNTAIN IRELAND HOLDINGS 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 IRON MOUNTAIN IRELAND HOLDINGS LIMITED have on record?
1 shareholder is shown on record for IRON MOUNTAIN IRELAND HOLDINGS LIMITED.
What is IRON MOUNTAIN IRELAND HOLDINGS LIMITED's company registration number?
IRON MOUNTAIN IRELAND HOLDINGS LIMITED's registration number is IE289489, filed with Companies Registration Office (CRO) in Ireland. Its current status on the register is active.
Is IRON MOUNTAIN IRELAND HOLDINGS LIMITED still an active company?
IRON MOUNTAIN IRELAND HOLDINGS LIMITED's status on Companies Registration Office (CRO) is listed as active.
When was IRON MOUNTAIN IRELAND HOLDINGS LIMITED incorporated?
IRON MOUNTAIN IRELAND HOLDINGS LIMITED was incorporated on 1 July 1998, according to Companies Registration Office (CRO).
What is IRON MOUNTAIN IRELAND HOLDINGS LIMITED's registered address?
The registered address on file for IRON MOUNTAIN IRELAND HOLDINGS LIMITED is DAMASTOWN DUBLIN 15, Ireland.
What legal structure is IRON MOUNTAIN IRELAND HOLDINGS LIMITED registered as?
IRON MOUNTAIN IRELAND HOLDINGS LIMITED is registered as a Private limited company (Ltd.) in Ireland.
Who are the officers/directors of IRON MOUNTAIN IRELAND HOLDINGS LIMITED?
The Director of IRON MOUNTAIN IRELAND HOLDINGS LIMITED currently on record is DENIS COLMAN CRONIN; five officers are currently on record for IRON MOUNTAIN IRELAND HOLDINGS LIMITED, filed with Companies Registration Office (CRO). Management authority at IRON MOUNTAIN IRELAND HOLDINGS LIMITED sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does IRON MOUNTAIN IRELAND HOLDINGS LIMITED have a parent company or subsidiaries?
IRON MOUNTAIN IRELAND HOLDINGS LIMITED sits 5 levels below its ultimate parent, Iron Mountain Incorporated, registered in United States. 1 subsidiary is recorded beneath it, across 1 jurisdiction. Those 1 subsidiary spans Ireland 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 IRON MOUNTAIN IRELAND HOLDINGS LIMITED's ownership over time?
This profile reflects a point-in-time snapshot from Companies Registration Office (CRO). Zavia's monitoring API can track changes to IRON MOUNTAIN IRELAND HOLDINGS 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 IRON MOUNTAIN IRELAND HOLDINGS LIMITED's data through an API?
Yes. Zavia's API connects directly to official government ownership registries across 195 countries and territories, including Ireland, so records like IRON MOUNTAIN IRELAND HOLDINGS 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 Registration Office (CRO) and was last synced on 27 October 2026.