# Fluidstack

Canonical page: https://technooptimist.io/companies/fluidstack
Fluidstack, founded at Oxford University in 2017, builds and runs GPU clusters for AI labs. It is Anthropic's partner for a $50B US data-centre build-out and leases large campuses such as TeraWulf's Lake Mariner, backed by Google.

## In brief

- Builds Anthropic's custom data centres in Texas and New York, part of a $50B plan; first sites online during 2026.
- Raised $830M Series A at $7.5B in Jan 2026, led by Situational Awareness.
- Leases about 360 MW at Lake Mariner, NY; Google backstops $3.2B of the lease obligations.

## Facts

- Founded: 2017
- Headquarters: GB
- Status: private
- Valuation: $7.5B (private valuation)
- Raised: $830M
- Website: https://www.fluidstack.io
- Frontiers: [Computing](https://technooptimist.io/computing.md) (AI clouds), [AI](https://technooptimist.io/ai.md)

## Programs

- [Fluidstack AI cloud](https://technooptimist.io/computing/fluidstack-ai-cloud.md) (Computing): Scaling; next: Anthropic Texas and New York sites online (2026). 102 MW live at Lake Mariner (July 2026); Anthropic sites powering up through 2026.

## Technical approach

- **Prefab: Data centres built in a factory**: Facilities are assembled from prefabricated modules made in a factory, aiming to cut build times from several years to about six months.
- **Power: Securing power first**: It helps customers find and contract power, often at converted bitcoin-mining sites with grid connections already in place.
- **Software: Cluster management**: Runs the clusters after construction with its own management platform; observability and alerting tools are in development.

## Open problems

- **Delivering on schedule** (open): Gigawatt promises depend on partners' buildings and power; at Lake Mariner the newest building slipped from H2 2026 to early 2027.
- **Concentrated customers** (open): Much of its growth rides on a few frontier labs, above all Anthropic.

## Latest updates

- **5 Aug 2026**: TeraWulf completes CB-3 for Fluidstack, bringing Lake Mariner to 102 MW; CB-5 moves to early 2027. TeraWulf finished delivering the CB-3 building in early July 2026, lifting revenue-generating capacity at Lake Mariner to 102 MW and activating $600M of Google's credit support for Fluidstack's lease. ([our story](https://technooptimist.io/stories/terawulf-completes-cb-3-for-fluidstack-bringing-lake-mariner-to-102-mw-1d62369d.md) · [original source](https://www.stocktitan.net/news/WULF/tera-wulf-reports-second-quarter-2026-xroiqofrgahk.html))
- **20 Jul 2026**: Fluidstack confirms $830M Series A at a $7.5B valuation, led by Situational Awareness. Fluidstack disclosed an $830M Series A closed in January at a $7.5B valuation, led by Situational Awareness. ([our story](https://technooptimist.io/stories/fluidstack-confirms-830m-series-a-at-a-7-5b-valuation-led-by-5735c2e9.md) · [original source](https://siliconangle.com/2026/07/21/ai-data-center-builder-fluidstack-raises-830m-7-5b-valuation/))
- **12 Nov 2025**: Anthropic picks Fluidstack to build custom data centres in Texas and New York in a $50B plan. Anthropic said it will spend $50B building its own AI data centres with Fluidstack, starting with sites in Texas and New York that power up through 2026. ([our story](https://technooptimist.io/stories/anthropic-picks-fluidstack-to-build-custom-data-centres-in-texas-and-cc7435a1.md) · [original source](https://www.constellationr.com/insights/news/anthropic-spend-50-billion-ai-infrastructure-fluidstack-partnership))
- **14 Aug 2025**: TeraWulf leases 200+ MW to Fluidstack at Lake Mariner, with Google backstopping $1.8B. TeraWulf signed two 10-year colocation agreements with Fluidstack for over 200 MW of critical IT load at its Lake Mariner campus in western New York, worth about $3.7B. ([our story](https://technooptimist.io/stories/terawulf-leases-200-mw-to-fluidstack-at-lake-mariner-with-google-c31da6b3.md) · [original source](https://www.sec.gov/Archives/edgar/data/1083301/000110465925078084/tm2523008d2_ex99-1.htm))
- **Feb 2025**: Fluidstack signs MoU with France for a 1 GW nuclear-powered AI supercomputer, €10B first phase. At the AI Action Summit in Paris, Fluidstack signed a memorandum with the French government for an AI supercomputer of 1 GW, powered by France's mostly nuclear grid. ([our story](https://technooptimist.io/stories/fluidstack-signs-mou-with-france-for-a-1-gw-nuclear-powered-ai-c0b2cf91.md) · [original source](https://bebeez.eu/2025/02/18/gpu-cloud-provider-fluidstack-signs-mou-for-1gw-ai-supercomputer-in-france/))

## Funding

| Date | Round | Amount | Post-money | Leads |
| --- | --- | --- | --- | --- |
| Jan 2026 | Series A | $830M | $7.5B | Situational Awareness |

## Partners, customers and investors

- Anthropic (customer): Builds custom data centres in Texas and New York as part of Anthropic's $50B US infrastructure plan.
- TeraWulf (supplier): Hosts Fluidstack at Lake Mariner, NY: about 360 MW of critical IT load under 10-year leases.
- Google (partner): Backstops about $3.2B of Fluidstack's Lake Mariner lease obligations in return for TeraWulf warrants.
- Mistral AI (customer): Customer; Fluidstack hosts a Mistral training cluster at Eclairion's site south of Paris.

## People

- Gary Wu, CEO
- César Maklary, Co-founder & President

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