Fluidstack at a glance
As of- Headquarters
- New York, New York, USA[3]
- [1] Latest valuation: Forbes, September 3, 2026
- [2] Lead investors: Fluidstack, January 10, 2026
- [3] Headquarters: Fluidstack (retrieved December 4, 2025)
Ranked on: #4 Largest Series A Rounds of 2026 (Ranked) · #9 Top AI Startups 2026 · #13 Largest Series C+ Rounds of 2026 (Ranked) · Get your badge →
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Company Snapshot
Fluidstack is a AI infra company, based in New York, New York, USA, founded 2017.
Recent changes
- Sep 11, 2026Sep 11, 2026Pentagon Weighs $5B Loan For AI Cloud Startup Fluidstack Pulse story
- Sep 7, 2026Sep 7, 2026This Week's AI Money: Crusoe, Fluidstack and a $100M Security Check Pulse story
- Sep 5, 2026Sep 5, 2026Jane Street Leads $1.5B Into Fluidstack at $18B Pulse story
- Sep 3, 2026Sep 3, 2026Raised $1.5B Growth at a $18B valuation Value Add Pulse enrichment
- Sep 3, 2026Sep 3, 2026New investor: Jane Street Value Add Pulse enrichment
Earlier changes (5)
- Sep 3, 2026Sep 3, 2026Valuation rose from $7.5B to $18B Forbes
- Jan 10, 2026Jan 10, 2026Raised $830M Series A at a $7.5B valuation Fluidstack
- Jan 10, 2026Jan 10, 2026New investor: Situational Awareness Fluidstack
- Jan 2026Jan 2026First reported valuation: $7.5B Forbes
- 20192019Raised $3M Seed Value Add Pulse enrichment
Funding history
3 equity events · newest first · sources dated per row| Date | Round | Amount | Valuation | Lead investors | Source |
|---|---|---|---|---|---|
| Sep 3, 2026 | Growthnot counted: no linked source | $1.5B | $18Bpost-money | Value Add Pulse research | |
| Jan 10, 2026 | Series A | $830M | $7.5Bpost-money | Situational Awarenessunverified | Fluidstack |
| 2019 | Seednot counted: no linked source | $3M | — | — | Value Add Pulse research |
Equity only. “Equity raised” above sums the rounds with a dated, linked source; rumored rounds, tender offers and secondary sales are listed but not counted, and debt financing is listed separately.
Investors
Latest Pulse
- Oct 2, 2026AI Data Center Debt Is Showing Up EverywhereLambda disclosed its third GPU-backed loan of 2026 this week, the latest sign that AI infrastructure financing is leaning harder on debt as CoreWeave carries $35 billion and climbing.→
- Sep 15, 2026Oracle, Microsoft And The Pentagon, By The NumbersValue Add Pulse tallies three numbers from the past week's AI infrastructure coverage -- Oracle's $664B cloud backlog, Microsoft's 38GW power target, and the Pentagon's proposed $5B loan to Fluidstack -- that together price the buildout's capital intensity.→
- Sep 12, 2026AI Data Centers Are Now Built Like Military BunkersA UAE AI campus now weighs underground bunkers and air defense, Google just locked in nuclear power for Finland, and a nuclear-plant operator is going public -- power and physical security, not GPUs, are AI's newest constraint.→
- Sep 11, 2026Pentagon Weighs $5B Loan For AI Cloud Startup FluidstackThe Pentagon's Office of Strategic Capital is negotiating what would be its largest loan ever -- not to build a new AI data center, but to shore up the supply chain behind the ones already under construction.→
- Sep 8, 2026Nuclear Is the Next AI Trade Nobody's Pricing RightHoltec's priced IPO and SB Energy's hyperscaler-backed backlog both sell the same underlying thesis -- that data centers will pay a premium for firm power -- and public investors are about to test whether that premium is real.→
- Sep 8, 2026This Week Showed AI Funding's Two Speeds at OnceStoke Space and Mistral raised a combined $4.2 billion this week while Sapien and NavigateAI, two real vertical-AI companies with paying customers, raised a combined fraction of that -- the same split Pulse has tracked in AI money all year.→
- Sep 7, 2026Data Center Freezes Are Becoming the Default CaseThailand's blanket halt on data center approvals is the fourth government in 2026 to freeze new capacity rather than ration it, and the pattern is now bigger than any single grid.→
- Sep 7, 2026Nvidia Now Sits on Every Side of the AI TradeNvidia is the chip vendor to Crusoe and Fluidstack, an equity investor in Ineffable and SB Energy, and as of this month the owner of Hugging Face -- the open-model registry the industry treats as neutral ground.→
- Sep 7, 2026TeraWulf's AI Data Center Has a Four-Company Accountability GapA fire at TeraWulf's $3.2 billion Lake Mariner AI data center exposed how the site's four-party structure -- TeraWulf, Fluidstack, Google and Anthropic -- leaves no single company clearly accountable when something goes wrong.→
- Sep 7, 2026The Application Layer Is Where I'd Be Writing ChecksNearly $5 billion went into three compute-layer companies in a single week while the software built on top of that compute raised a fraction of it -- and the compute bets are credit trades wearing venture clothes.→
Coverage Timeline
newest first- Sep 15, 2026FUNDINGOracle, Microsoft And The Pentagon, By The Numbers→
- Sep 11, 2026FUNDINGPentagon Weighs $5B Loan For AI Cloud Startup Fluidstack$5B loan (in talks)→
- Sep 7, 2026AITeraWulf's AI Data Center Has a Four-Company Accountability Gap→
- Sep 7, 2026FUNDINGThis Week's AI Money: Crusoe, Fluidstack and a $100M Security Check$4.5B+ disclosed this week→
- Sep 6, 2026FUNDINGWhy AI Compute Swallowed the Week's Venture Dollars$4.8B in five days→
- Sep 5, 2026FUNDINGJane Street Leads $1.5B Into Fluidstack at $18B$1.5B at $18B valuation→
All Coverage
FUNDING
Oracle, Microsoft And The Pentagon, By The Numbers
Value Add Pulse tallies three numbers from the past week's AI infrastructure coverage -- Oracle's $664B cloud backlog, Microsoft's 38GW power target, and the Pentagon's proposed $5B loan to Fluidstack -- that together price the buildout's capital intensity.
BY THE NUMBERS
Pentagon Weighs $5B Loan For AI Cloud Startup Fluidstack
FUNDING$5B loan (in talks)
Pentagon Weighs $5B Loan For AI Cloud Startup Fluidstack
The Pentagon's Office of Strategic Capital is negotiating what would be its largest loan ever -- not to build a new AI data center, but to shore up the supply chain behind the ones already under construction.
DEEP DIVE
TeraWulf's AI Data Center Has a Four-Company Accountability Gap
AI
TeraWulf's AI Data Center Has a Four-Company Accountability Gap
A fire at TeraWulf's $3.2 billion Lake Mariner AI data center exposed how the site's four-party structure -- TeraWulf, Fluidstack, Google and Anthropic -- leaves no single company clearly accountable when something goes wrong.
DEEP DIVE
This Week's AI Money: Crusoe, Fluidstack and a $100M Security Check
FUNDING$4.5B+ disclosed this week
This Week's AI Money: Crusoe, Fluidstack and a $100M Security Check
Pulse's own tally of this week's disclosed rounds shows AI infrastructure and security pulling in well over $4.5 billion in six days, before counting fintech, space or robotics separately.
BY THE NUMBERS
Why AI Compute Swallowed the Week's Venture Dollars
FUNDING$4.8B in five days
Why AI Compute Swallowed the Week's Venture Dollars
Crusoe, Fluidstack and Gimlet Labs closed $4.8 billion between them in five days, and every dollar landed in the layer between the chips and the models rather than in the applications built on top.
DEEP DIVE
Jane Street Leads $1.5B Into Fluidstack at $18B
FUNDING$1.5B at $18B valuation
Jane Street Leads $1.5B Into Fluidstack at $18B
The Oxford spinout that builds and operates data centers for Anthropic and Google has more than doubled its valuation since December, on the back of contracts it signed before it owned a single chip.
DEEP DIVE
Value Add Research
- VC & Investing · Sep 10, 2026Fluidstack Valuation 2026: $18B Reported, Jane Street Leads
- Market & Trends · Oct 22, 2026Biggest AI Infrastructure Funding Rounds Q3 2026: $5B Ties for Top
- Market & Trends · Oct 13, 2026September 2026's Biggest Startup Funding Rounds: $30.3B
- VC & Investing · Oct 13, 2026SWI Group Valuation 2026: $6.9B After $900M Raise
- AI & Technology · Oct 6, 2026DayOne Data Centers IPO: $5B Raise, $20B Valuation, DODC
- Market & Trends · Oct 2, 2026Venture Numbers, Reconciled: Why 2026 Trackers Disagree
- Market & Trends · Sep 27, 2026Crusoe Series F: Inside the $30.9B AI Data Center Company
- VC & Investing · Sep 10, 2026Jane Street's $21.5B AI Infrastructure Bet, Explained
Related Companies
Fluidstack FAQ
What is Fluidstack's valuation?
Fluidstack was last valued at $18B in its September 2026 Growth, according to Forbes (September 3, 2026).
Who invested in Fluidstack?
Lead investors in Fluidstack's sourced funding rounds include Situational Awareness. Per round: its January 2026 Series A was led by Situational Awareness.
Where is Fluidstack headquartered?
Fluidstack is headquartered in New York, New York, USA, according to Fluidstack.
Sources & methodologyshow
Where these figures come from
- Fluidstackprimary source1 fact
- Forbesmajor outlet1 fact
- Value Add Pulse researchValue Add VC data2 facts
Figures are labelled Reported (a source states it), Estimated, Derived (computed from other facts) or Rumored (in talks / unconfirmed). Rumors never replace a confirmed figure. Each figure keeps its own as-of date; history is preserved rather than overwritten.