Jane Street portfolio

Jane Street has 5 portfolio companies on record at Recent Funding, with 5 investments in the last 12 months.

Website: janestreet.com.

Type: Investor.

Portfolio on Recent Funding: 5.

Deals, last 12 months: 5.

Rounds led: 4 of 5.

Capital in their rounds: $3.1B.

Latest deal: Fluidstack · Sep 3, 2026.

About this page

It led 4 of the 5 rounds it joined. Its most recent investment on record is Fluidstack's $1.5B Series B+ round in September 2026, which it led. By category, its portfolio leans toward AI infrastructure and compute (4) and Developer tools and cloud (3). It has co-invested with Sequoia, Andreessen Horowitz and Diffusion Capital, most often Sequoia (2 rounds).

What Jane Street invests in

Jane Street recent investments

Company	Round	Date	Alongside
FFluidstack	Series B+ · $1.5B · lead	Sep 3, 2026	none named
EEtched	Series B+ · $700M · lead	Aug 18, 2026	Primary, Argo, Positive Sum +10
EEtched	Series B+ · $300M	Jul 23, 2026	Sequoia (lead), Andreessen Horowitz, SK hynix +1
MMatX	Series B+ · $500M · lead	Feb 24, 2026	NFDG Ventures, Alchip, John Collison +8
AAntithesis	Series A · $105M · lead	Dec 3, 2025	Karatage, First In, Teamworthy Ventures +6

How Jane Street invests

Stage	Deals	Capital in rounds
Series B+	4 80%	$3B
Series A	1 20%	$105M

Year	Deals	Capital in rounds
2025	1 20%	$105M
2026	4 80%	$3B

Jane Street portfolio companies

FFluidstack$1.5BSeries B+ · Sep 2026
EEtched$700MSeries B+ · Aug 2026
MMatX$500MSeries B+ · Feb 2026
AAntithesis$105MSeries A · Dec 2025
OOxide Computer Companybacker

Company	Round with Jane Street	Total raised	Latest raise
FFluidstack AI infrastructure and compute	Sep 3, 2026 Series B+ · $1.5B · lead	$2.33B	Sep 3, 2026 Series B+
EEtched AI infrastructure and compute	Aug 18, 2026 Series B+ · $700M · lead	$1.63B	Aug 18, 2026 Series B+
MMatX AI infrastructure and compute	Feb 24, 2026 Series B+ · $500M · lead	$580M	Feb 24, 2026 Series B+
AAntithesis Developer tools and cloud	Dec 3, 2025 Series A · $105M · lead	$152M	Dec 3, 2025 Series A
OOxide Computer Company AI infrastructure and compute	backer	$789M	Oct 9, 2026 Series B+

Most frequent co-investors

Similar investors

Investors whose portfolios on Recent Funding center on the same category (AI infrastructure and compute).

How this is counted

Share is of the 5 rounds on Recent Funding that name Jane Street. Rounds with no announced date are left out of the year split, and "round" is a round whose stage is not on file.

Portfolio companies are the companies on Recent Funding with a round that lists Jane Street, which is a subset of its real portfolio. API: /api/v1/investors/jane-street (get a free API key). More: the most active VC firms and new venture capital funds.