Vaultica: STO01A
Vaultica's STO01A is a carrier-neutral colocation data center in Upplands Väsby, north of Stockholm, inside a converted factory building. DigiPlex opened it in 2016; it became STACK in 2022 and Vaultica in 2025.
Vaultica
Vaultica runs carrier-neutral enterprise colocation in five European metros: Milan, Geneva, Copenhagen, Stockholm and Oslo. Its seven data centers serve telecom carriers, IT and cloud providers, and financial institutions. At MIL01 in Siziano and GEN02 in Gland, it sells colocation inside buildings that STACK still runs. It is building MIL03 in Settimo Milanese and plans MAD01 in Alcalá de Henares, near Madrid.
Infrastructure funds managed by Apollo own the company. Apollo agreed on 29 April 2025 to buy STACK Infrastructure's European colocation business from Blue Owl Digital Infrastructure. The carve-out closed on 13 August 2025. STACK had set up the colocation unit in 2024, and it kept its European hyperscale business. The carved-out business launched as Vaultica on 10 December 2025.
Leadership
- Sherif Rizkalla, CEO. He led SUPERNAP Italia from 2019, then STACK's Italian and Swiss business, then STACK EMEA's enterprise colocation unit.
- Roger Semprini, Group Chief Commercial Officer since December 2025. He was previously managing director of Equinix Switzerland.
Predecessor brands
- DigiPlex (Nordics): Byrne Murphy and Bill Conway bought the Norwegian operator in 2001. DigiPlex built the Oslo, Stockholm and Copenhagen sites. IPI Partners bought it in 2021.
- Safe Host (Geneva): Gérard Sikias founded it in 2000. Safe Host built the two Geneva-area sites. IPI Partners agreed to buy it in May 2022.
- SUPERNAP Italia (Milan): Switch, Accelero Capital and Orascom TMT Investments formed SUPERNAP International in 2014. Its Italian arm built the Siziano campus from 2015. IPI Partners bought control in February 2021.
IPI Partners merged DigiPlex and SUPERNAP Italia into STACK EMEA in March 2022 and later added Safe Host.
History
- 2026: Joined the CERN Internet Exchange Point in July.
- 2026: Announced MAD01 in Alcalá de Henares, near Madrid, on 28 April.
- 2026: Broke ground on MIL03 in Settimo Milanese on 12 March.
- 2025: Launched as Vaultica on 10 December.
- 2025: Apollo funds agreed on 29 April to buy STACK's European colocation business and closed on 13 August.
- 2024: STACK formed a separate enterprise colocation unit in EMEA.
- 2022: IPI Partners agreed in May to buy Safe Host.
- 2022: DigiPlex and SUPERNAP Italia rebranded as STACK EMEA in March.
- 2021: IPI Partners agreed in July to buy DigiPlex and closed in August.
- 2021: IPI Partners bought control of SUPERNAP Italia in February.
- 2018: DigiPlex took over Telia's Copenhagen data center in May, with Telia as anchor customer.
- 2017: Safe Host opened its Gland data center in May.
- 2016: SUPERNAP Italia opened the Siziano campus; DigiPlex opened its Stockholm data center.
- 2015: Construction started at Siziano in July.
- 2013: DigiPlex bought 7 hectares in Upplands Väsby for its Stockholm site.
- 2010: DigiPlex opened Rosenholm, Oslo.
- 2002: Safe Host opened its first data center, in Plan-les-Ouates.
- 2001: DigiPlex took over the Ulven data center in Oslo.
- 2000: Gérard Sikias founded Safe Host in Geneva.
Vaultica Data Center Map
Vaultica Power Growth Over Time
+4%
since 2022
Operational
Construction
Planned
Prospective
Land Bank
In Doubt
Planned / Prospective
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Request Dataset
sites announced, but haven't started construction
Vaultica: GEN01
Vaultica's GEN01 is a colocation data center in Plan-les-Ouates, on Geneva's southern edge. Safe Host opened it in 2002 as SH1, its first site; it became STACK in 2022 and Vaultica in 2025.
Vaultica: COP01
Vaultica's COP01 is a carrier-neutral colocation data center on three floors of a concrete building on Holmbladsgade, central Copenhagen. Telia sold it to DigiPlex in 2018; it became STACK in 2022 and Vaultica in 2025.
Vaultica: OSL01
Vaultica's OSL01 is a carrier-neutral colocation data center in Oslo's Økern district, in a building put up in 1981 as the Norwegian government's data hub. DigiPlex ran it from 2001; it became STACK in 2022 and Vaultica in 2025.
Vaultica: MIL03
Vaultica's MIL03 is a new colocation data center on Via Marisa Bellisario in Settimo Milanese, west of Milan. It is built for enterprise, cloud and AI workloads, with modular data halls and a dedicated office building.
Vaultica: MAD01
Vaultica's MAD01 is a planned colocation data center campus in the Los Salobrales industrial estate in Alcalá de Henares, about 25 km from Madrid. It is Vaultica's first site in Spain and sits within an existing industrial complex.
Vaultica: Gland GEN02
Vaultica sells carrier-neutral colocation inside STACK's GEN02 data center in Gland, between Geneva and Lausanne. The business was part of STACK until Apollo-managed funds bought it in 2025.
Vaultica: Siziano MIL01
Vaultica sells carrier-neutral enterprise colocation on STACK's MIL01 campus in Siziano, south of Milan. The business was part of STACK until Apollo-managed funds bought it in 2025.
Vaultica: OSL02
Vaultica's OSL02 is an underground colocation data center in former IBM bunkers beneath the Rosenholm Business Center, south of Oslo. DigiPlex rebuilt and opened it in 2010; it became STACK in 2022 and Vaultica in 2025.
Vaultica Data Center Photos See all
An aerial view of Stack Infrastructure's MIL01 Campus in Milan
Source:
Schneider Electric Italia
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