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Callosum

Cloud Infrastructure·United Kingdom·Active·New
Entry
2026
Hold
New
Status
Active

Who owns Callosum?

Callosum is a British Cloud Infrastructure company, currently owned by Atomico since 2026 and Inception Fund.

Hand-verified · updated 2026-08-18

Open JSON · CC-BY
Inception Fund
Most recent investor
Inception Fund
Inception Fund I · 2025 · VC
2 ownership periods · full history below

Key facts

HQUnited Kingdom
SectorCloud Infrastructure
StatusActive

Ownership history

2 ownership periods

Active
Co-held by Atomico and Inception Fund since 2026.
Atomico
AtomicoActive
2026 · present(<1yr) · Atomico Venture VI · 2024 · VC
Inception Fund
Inception FundActive
2026 · present(<1yr) · Inception Fund I · 2025 · VC

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Questions

Who owns Callosum?

Callosum is currently owned by Atomico and Inception Fund, through Inception Fund I, since 2026.

When did Atomico and 1 other acquire Callosum?

Atomico and 1 other acquired Callosum in 2026.

Who has owned Callosum over time?

Callosum has been through 2 private-equity ownership periods: Atomico · via Atomico Venture VI · since 2026; Inception Fund · via Inception Fund I · since 2026.

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