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Jane Street

Activity from announced rounds

Activity in this selectionUnited Kingdom · Oct 12, 2026 · Jan 1, 2026
Rounds participated in
2
Confirmed lead rounds
1
1 roles undisclosed
New companies
2
First participation on record · 0 follow-on
Funding in participating rounds
$3.5B
2 disclosed · full round size, not this investor’s share

By stage

Series C+1
Undisclosed1

By primary sector

AI2

By country

United Kingdom2

Rounds

2 in this selection
Fluidstack

Fluidstack develops data centers and operates large-scale compute infrastructure for AI developers.

$1.5BUndisclosed
Lead
Nscale

Provides vertically integrated AI infrastructure for enterprise AI training, fine-tuning, and inference

$2BSeries C
Role not disclosed