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STACK MIL01 Siziano Campus

Siziano / Milan market, 25, ItalyOperating / Stabilized
Capacity
27 MW
Planned critical IT
Lead participant
STACK Infrastructure
Operator
Last updated
Aug 22, 2026
Most recent public record update

About STACK MIL01 Siziano Campus

STACK's current MIL01 campus in Siziano comprises three operating buildings totaling 27 MW. Older STACK and SUPERNAP releases describe broader Milan/Siziano scopes and expansion potential, so those figures are not added to the current MIL01 record.

Capacity

Planned critical IT
Operating capacityAn operating IT-capacity figure has not been publicly disclosed.
It Load27 MWActual · STACK MIL01 Siziano Campus
It Load12 MWActual · MIL01A
It Load12 MWActual · MIL01B
It Load3 MWActual · MIL01C

Development

4 phases · 4 milestones
MIL01AOperational

12 MW building within the current 27 MW MIL01 boundary.

1 building

MIL01BOperational

12 MW building within the current 27 MW MIL01 boundary.

1 building

MIL01COperational

3 MW building within the current 27 MW MIL01 boundary.

1 building

Legacy Siziano/Milan expansion contextChanged Or Cancelled

The 40 MW, 50+ MW, 75 MW, 80+ MW and 299 MW figures describe broader or later development scopes rather than current MIL01 capacity.

Jun 8, 2021
Sirti/Terna HV connection program announced
Completed
Nov 23, 2021
Second facility on legacy Milan campus opened
Completed
Jul 27, 2022
Third data center on legacy Milan campus opened
Completed
Apr 9, 2024
USD 1.2b financing benefits Milan campuses
Completed

Infrastructure

Electric GridOperational

27 MW

Current MIL01 campus capacity across three buildings.

Electric GridOperational

Dedicated high-voltage substation on the current MIL01 page.

Electric GridReported Context

80 MW up to

Broader campus HV line and HV/MV substation program delivered with Sirti; not MIL01 IT capacity.

FiberReported Context

Historical broader campus proximity/connectivity to MIX.

Renewable Energy SupplyOperational

100 %

Operator claimed 100% certified green energy; certificate details not independently audited in this batch.

Project map

0 of 1 project point mapped
Infrastructure facts
5
Mapped records
1
Capacity figures
3

No map point available

Power & interconnection: 4Fiber & connectivity: 1

Facts & sources

Published claims and their source links.

9 facts
Operational Status
Operating
Actual
Campus Capacity
27 MW
Actual
Land Area
25 acres
Actual
Building Count
3
Actual
Building Capacity
12 MW
Actual
Building Capacity
12 MW
Actual
Building Capacity
3 MW
Actual
Dedicated High Voltage Substation
Present
Actual
Energy Claim
100% Certified green energy
Actual