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CARTIS

Iron Mountain AMS-1 Amsterdam Data Center

Haarlem, North Holland, NetherlandsPartially operational
Evidence
Planned critical IT
43.1 MW
Updated
Oct 28, 2026

AMS-1 in Haarlem currently provides 13.1 MW and is almost fully leased. A 10 MW phase is under construction for Q2 2027 within a 43.1 MW full-build plan. Cartis publishes 13.1 MW as the current operating headline and keeps the construction phase and wider design potential separate; the SEC-reported $156.6 million expected Phase 4 investment is scoped to that expansion. Customer utilization, private contract terms and unreported project financing remain outside the verified public record.

Capacity

Reported capacity

Design

43.1 MW

Source

Reported capacity

Design

13.1 MW

Source

Operating IT capacity: Not established in published records

A missing figure does not mean zero. Planned, utility and generation figures are not operating IT capacity.

Development

Operating facility and documented expansionOperational

AMS-1 in Haarlem currently provides 13.1 MW and is almost fully leased. A 10 MW phase is under construction for Q2 2027 within a 43.1 MW full-build plan. Cartis publishes 13.1 MW as the current operating headline and keeps the construction phase and wider design potential separate; the SEC-reported $156.6 million expected Phase 4 investment is scoped to that expansion. Customer utilization, private contract terms and unreported project financing remain outside the verified public record.

Milestones (2)
Project-specific evidence refreshed and reconciled

Aug 29, 2026 · Recorded actual event

Completed · Status changed

Source not linked
AMS-1 Phase 4 expected completion

Q2 2027 · Forecast / planned record

Forecast · Forecast completion

Source not linked

Participants

Iron Mountain Data Centers

Developer

Sources by role
Developer (1)

Capital & incentives

Financing records

Investment commitment

$156,600,000

Jun 30, 2026

SEC-reported total expected investment for the 10 MW AMS-1 Phase 4 expansion; not a facility valuation or debt instrument.

Parties & sources

Iron Mountain Data Centers (Borrower)

Sources (1)

Site & development

Location context

Actual

AMS-1 | Haarlem | North Holland | NL

Source

Location context

Actual

AMS-1 | Haarlem | North Holland | NL

Source

Project location

Actual

Haarlem, North Holland, NL

Source

Technical specifications

Renewable energy matching

Actual

Operator states 100% matched renewable energy where applicable

Source

Additional project facts

Lifecycle status

Actual

Partially operational

Source

Capacity basis

Actual

Iron Mountain publishes 43.1 MW for the AMS-1 facility record boundary.

Source

Lifecycle status

Actual

Partially operational

Source

Capacity basis

Actual

13.1 MW is current operating/leaseable capacity; 43.1 MW is the full build campus design and the next 10 MW is under construction for 2027.

Source

Operator or developer

Actual

Iron Mountain Data Centers

Source

Current lifecycle

Actual

Operating or in phased operation

Source

Capacity classification

Actual

It load

Source

Capacity basis

Actual

13.1 MW is current operating/leaseable capacity; 43.1 MW is the full build campus design and the next 10 MW is under construction for 2027.

Source

Customer utilization

Actual

Not publicly disclosed

Source

Source refresh date

Actual

2026-08-29

Source

Sec capacity comparison

Actual

Q2 2026 leaseable and development schedules reviewed

Source

Infrastructure & permits

Technical details (3)
Electric grid

Operational

13.1 MW

13.1 MW is current operating/leaseable capacity; 43.1 MW is the full-build campus design and the next 10 MW is under construction for 2027.

Fiber

Operational

Carrier-dense 23-acre campus with 2N/N+1 redundancy, renewable-energy matching and additional data center-module expansion.

Cooling system

Operational

Cooling and resilience architecture is described at facility or campus level; instantaneous draw and tenant utilization remain undisclosed.

Public-source research. Plans may change. See Evidence for sources and qualifications.