CityFibre

Fiberoptic Equipment · London, United Kingdom · Founded 2011 · Privately Held (backing)

Operator of an independent full fiber infrastructure platform and supplier of fiber optic equipment intended to serve service integrators, enterprise and consumer service providers and mobile… CityFibre is based in London, United Kingdom and was founded in 2011. Its last reported valuation was $3.6 billion in Mar 2023. It has raised $13.5 billion across 1 recorded round; the latest was a $4.4 billion growth round in Jul 2025.

Last reported valuation
$3.6B
Oct 2026
Priced at
—
Total raised
$13.5B
Last round
PE Growth/Expansion
Jul 2025
What is CityFibre worth?
$3.6Blast reported valuation · Oct 2026

CityFibre's last reported valuation, Mar 2023. Nothing priced has surfaced since.

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Valuation timeline

0 priced rounds · 32 daily marks since · Sep 2026 – Oct 2026
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Markrounds hold their value until the next priced eventMark, today
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CityFibre funding history

1 rounds
DateRoundRaisedPost-money
Jul 2025PE Growth/Expansion$4.4B▮
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CityFibre valuation

CityFibre's last reported valuation was $3.6 billion in Mar 2023. No priced round, secondary trade or fund mark has surfaced since.

How much has CityFibre raised?

CityFibre has raised $13.5 billion in total; 1 of its rounds is on record. The largest on record was a $4.4 billion growth round in Jul 2025.

How CityFibre's valuation is determined

Private company valuations aren’t quoted on an exchange — they’re established in moments: a priced funding round sets a post-money valuation, secondary trades print at a price per share, and SEC-registered funds holding the stock report fair-value marks in their N-PORT filings.

For CityFibre, the most current credible signal sets the number and the older ones confirm it: a live secondary-market price first, then three or more recent prints, then institutional fund marks, and otherwise the last priced round, which never decays. The valuation is the last round’s post-money moved by the price change since that round, so no share count is assumed. Today it is set by last reported valuation. Question about this number? Full methodology →

Frequently asked about CityFibre

What is CityFibre worth?
CityFibre is valued at $3.6B as of Oct 2026. CityFibre's last reported valuation, Mar 2023. Nothing priced has surfaced since.
How much has CityFibre raised?
CityFibre has raised $13.5B in total funding across 1 recorded rounds.
When did CityFibre last raise?
CityFibre last raised in Jul 2025 (PE Growth/Expansion), raising $4.4B.