Jane Street

Activity from announced rounds

All recorded activity
Rounds participated in
5
Confirmed lead rounds
1
3 roles undisclosed
New companies
5
First participation on record · 0 follow-on
Funding in participating rounds
$4.7B
5 disclosed · full round size, not this investor’s share

By stage

Series C+4
Undisclosed1

By primary sector

AI2
Hardware2
Climate tech1

By country

United States3
United Kingdom2

Rounds

5 in all activity
Fluidstack

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

$1.5BUndisclosed
Lead
Etched

Designs AI inference hardware systems combining specialized chips, racks and software.

$300MSeries C
Role not disclosed
Nscale

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

$2BSeries C
Role not disclosed
X-energy

X-energy develops small modular nuclear reactors and TRISO fuel for electricity and industrial energy.

$700MSeries C-1 (final close)
Participant