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How Fluidstack is winning the brownfield conversion layer
Fluidstack combines old power sites, new data-center buildings, strong financing, and AI customers. Its edge is assembling those pieces quickly, then owning the most important projects selectively.
Raymond Xu
July 20, 2026 · 8 min read
Fluidstack says it can deliver enormous AI computing sites in six months, while the rest of the industry often needs 18–24. Its biggest reuse project is still being built: as of March 31, 2026, rent had not started on any of Fluidstack's 378 megawatts at Lake Mariner in New York.
The business commitments are much further along. Anthropic chose Fluidstack for a $50 billion U.S. computing build, Google promised to support payments on major leases, and investors put $830 million into Fluidstack at a $7.5 billion company value. Those pieces let Fluidstack promise capacity before it owns a nationwide collection of sites.
Lake Mariner is a true brownfield: land used first for a coal plant, then Bitcoin mining, and now AI. Fluidstack's Texas and Louisiana projects include new buildings on power-ready land, so this article does not count all of its projects as brownfield.
01
Lake Mariner, NY
True brownfield
Coal plant → Bitcoin → purpose-built AI halls
02
Barber Lake, TX
Powered site
Energized substation + approved load; new halls
03
Abernathy, TX
New campus
168 MW project moving to Fluidstack-led control
04
River Bend, LA
Greenfield
245 MW first phase on a power-first campus
378 MW
server power Fluidstack has contracted at Lake Mariner
0 MW
Fluidstack rent had started as of March 31, 2026
133 MW
server power already delivered by the strongest current rival team
$530M
price for Fluidstack-led buyers to take control of a Texas project
How Fluidstack works
Several companies build one finished product.
A single technology company could buy the land, negotiate for electricity, finance the building, install the computers, and run them. Fluidstack assigns those jobs to specialist partners and combines the result for an AI customer.
At Lake Mariner, TeraWulf owns and builds the site, Fluidstack rents the space and runs the computing service, and Google makes the rental agreement safer for lenders. Construction loans become easier to raise when lenders trust that rent will be paid.
01 / asset
A site that already handled huge amounts of electricity
Land, roads, and the existing path for power
02 / landlord
The site owner and data-center builder
Brings electricity, builds the halls, and maintains them
03 / operator
The company packaging the site into AI compute
Combines the lease, design, computers, and daily operations
04 / credit
A stronger company promising the rent gets paid
Gives construction lenders confidence they will be repaid
05 / demand
AI customers that need the computers
Pays to use the finished computing service
Who is ahead
A signed deal matters. Working computers matter more.
Fluidstack has reserved hundreds of megawatts at one reused site, but its largest buildings are still under construction. Core Scientific and CoreWeave reported about 350 megawatts working across six converted mining sites by March 2. Galaxy and CoreWeave delivered another 133 megawatts at their Texas site on July 6.
Google has operated a data center beside Alabama's retired Widows Creek coal plant for years. TeraWulf now has a new 401-megawatt agreement directly with Anthropic at a former aluminum factory, showing that a site owner can sometimes skip the middle company.
Lake Mariner, NY
Fluidstack × TeraWulf
- What was reused
- Former coal plant → Bitcoin → HPC
- Promised capacity
- 378 MW critical IT
- What is working now
- Fluidstack lease: not commenced at Mar. 31
Six U.S. sites
Core Scientific × CoreWeave
- What was reused
- Bitcoin campuses → phased AI/HPC
- Promised capacity
- About 590 MW
- What is working now
- About 350 MW energized at Mar. 2
Helios, TX
CoreWeave × Galaxy
- What was reused
- Bitcoin campus → AI/HPC
- Promised capacity
- 526 MW critical IT / 800 MW gross
- What is working now
- 133 MW critical IT delivered Jul. 6
Hawesville, KY
Anthropic × TeraWulf
- What was reused
- Aluminum smelter → AI campus
- Promised capacity
- 401 MW critical IT / 20 years
- What is working now
- Initial service planned for late 2027
Widows Creek, AL
Google × TVA
- What was reused
- Retired coal plant grounds → cloud
- Promised capacity
- Capacity not publicly disclosed
- What is working now
- $2B+ invested; operating campus
What gets reused
Keep the route for electricity. Replace the computing equipment.
The useful inheritance is the industrial land, transmission lines, substation work, roads, and a community used to large energy facilities. Modern AI servers still need new buildings, cooling, electrical equipment, network connections, and backup systems.
A retired power plant used to send electricity out; a data center needs permission to pull electricity in. Cleanup, land ownership, permits, water, and local support can still remove the time advantage.
Reuse
The power corridor
The expensive route that brings electricity onto the property may already exist.
Reuse
Industrial entitlement history
The land already has a history of noisy, fenced, industrial use.
Rebuild
The compute plant
Most of the actual data-center building and cooling system still has to be new.
Diligence
The legal right to serve load
A power plant that once sent electricity out does not automatically let a data center pull electricity in.
Diligence
The liabilities
Cleanup, permits, water, ownership, and local approval can still stop the project.
Five successful approaches
Each leader solves a different hard problem.
Fluidstack combines sites and customers. TeraWulf and Galaxy own power-ready property and build data halls. Core Scientific prepares mining sites for later conversion. IREN owns almost every layer. Google buys and operates for the long term with a utility partner.
A serious project needs control of the land, a believable electricity plan, a large customer, and financing backed by that customer's contract. Land with old power equipment alone is only a possibility.
01
Fluidstack
Aggregate the portfolio
Find several fast sites, combine them into one customer promise, then buy into the best projects selectively.
02
TeraWulf
Own the conversion
Own the old site, build new halls in phases, and sometimes contract directly with the AI company.
03
Core Scientific
Design for conversion
Build Bitcoin sites so they can later accept better cooling, networks, and AI computers.
04
Galaxy × CoreWeave
Bank the grid approval
Use an approved Bitcoin power connection, prove one AI section works, then build the rest.
05
IREN
Own every layer
Own the site, cooling, computers, and cloud service instead of dividing them among partners.
06
Partner with the utility owner
Buy the former power-plant land from the utility and build for long-term ownership.
What changed on July 6
Fluidstack started buying more control.
A Fluidstack-led buyer group agreed to pay about $530 million for TeraWulf's half of the 168-megawatt Abernathy project in Texas. Fluidstack is moving beyond renting and operating into owning important projects.
The same filing announced that TeraWulf had signed a 20-year agreement worth about $19 billion directly with Anthropic at another old industrial site. Once site owners prove they can deliver, they can form their own customer relationships.
Fluidstack therefore needs to keep finding sites faster, standardize how they are built, operate the computing clusters better, and own the projects where control matters most.
Same filing / two strategies
Fluidstack moves down
A buyer group it leads acquires control of the Abernathy project.
TeraWulf moves up
The brownfield landlord signs Anthropic directly at Hawesville.
The takeaway
Old sites are useful when they save time.
Fluidstack's advantage comes from turning scattered power-ready properties into one promise an AI company can buy. The company uses both old industrial sites and new construction because speed to working computers is the goal.
Core Scientific and CoreWeave lead on disclosed working conversion capacity in this set. Galaxy has the newest large single-campus delivery, TeraWulf is strongest at signing directly on old industrial sites, and Google proved the approach can last. Fluidstack's distinct skill is assembling the whole network—and it is now buying more of that network.
Terms used on this page
- Brownfield
- Previously developed land or infrastructure being reused for a new project.
- Critical IT MW
- Electric capacity that reaches servers, excluding cooling and other facility overhead.
- Credit backstop
- A promise by a stronger company to cover specified payment or performance obligations.
- HPC
- High-performance computing: dense clusters used for AI training, inference, and scientific workloads.
Primary sources
- Fluidstack: 6-month delivery claim ↗
- Fluidstack: $830M Series A ↗
- Anthropic: $50B U.S. build with Fluidstack ↗
- TeraWulf Q1 2026 10-Q ↗
- TeraWulf FY2025 results ↗
- TeraWulf Jul. 6, 2026 8-K ↗
- Century Aluminum: Hawesville sale ↗
- Hut 8: River Bend partnership ↗
- Cipher 2025 10-K: Barber Lake ↗
- Galaxy: Helios Phase I delivered ↗
- Galaxy: Helios conversion and CoreWeave lease ↗
- CoreWeave Q1 2026 results ↗
- Core Scientific 2025 10-K ↗
- Core Scientific FY2025 results ↗
- IREN Q3 FY2026 results ↗
- Google: operational Jackson County campus ↗
- Google: why it chose Widows Creek ↗
- LBNL: Repurposing coal assets ↗
Brownfield diligence
The old asset is only useful if the new load can turn on.
Cliff reads the utility, environmental, zoning, title, and permitting record behind a powered site—before the schedule claim becomes underwriting.