Cumulus Data
Cumulus Data was a Talen Energy subsidiary that operated a carbon-free hyperscale data center platform co-located with the Susquehanna nuclear plant in Pennsylvania. It served AI and cloud workloads via behind-the-meter power and ran a Bitcoin mining JV with TeraWulf; the campus was acquired by AWS in March 2024.
- Company typePrivate
- Founded2020
- HeadquartersSheffield, United Kingdom
- Headcount1–10
- GTM typeB2B
- OfferingServices
What Cumulus Data does
Cumulus Data was a wholly-owned subsidiary of Talen Energy Corporation that developed and operated a carbon-free hyperscale data center platform, the Cumulus Digital Infrastructure Platform, anchored at Talen's Susquehanna nuclear generating station in Pennsylvania. The company's core technical proposition was a behind-the-meter power configuration: data center capacity directly connected to the nuclear plant, bypassing PJM grid interconnection queues and securing firm, zero-carbon baseload electricity for AI and cloud computing workloads. Its proprietary infrastructure supported two revenue streams: recurring hyperscale colocation services aimed at cloud and AI operators (with AWS as the anchor customer), and a transaction-fee Bitcoin mining joint venture with TeraWulf that monetized surplus power through high-performance computing.
The go-to-market was a direct enterprise field-sales motion targeting hyperscale cloud providers and AI infrastructure companies requiring reliable, carbon-free power. The platform was launched in 2021, supported by up to $175 million in strategic capital from Orion Energy Partners, and was expected to reach completion in the second half of 2022. In March 2024, the Cumulus Data Center Campus was acquired by AWS for $650 million, after which the subsidiary effectively ceased operating as a standalone entity. Cumulus's pre-acquisition team was small (1–10 employees) and included a Chief Data Center Officer (Kevin Dalton) and Chief Revenue Officer (Scott Hanna), reflecting a lean operating structure that leveraged Talen's existing nuclear asset base rather than building independent infrastructure.
Cumulus Data firmographics
Firmographics- Name
- Cumulus Data
- Legal name
- Cumulus Data
- Website
- https://cumulusinfra.com
- Company type
- Private
- Founded year
- 2020
- Operating status
- Acquired
- Headcount range
- 1–10 employees
- Short description
- Cumulus Data was a Talen Energy subsidiary that operated a carbon-free hyperscale data center platform co-located with the Susquehanna nuclear plant in Pennsylvania. It served AI and cloud workloads via behind-the-meter power and ran a Bitcoin mining JV with TeraWulf; the campus was acquired by AWS in March 2024.
- Ownership category
- akta.pro rank
Cumulus Data industry classification
Industry- Product category
- Hyperscale Data Center Infrastructure
- NAICS
- Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518), Electric Power Generation, Transmission and Distribution (2211)
- SIC
- Cogeneration Services & Small Power Producers (4991)
- akta.pro primary industry
- HPC / AI-Optimized Data Center Facilities (HDABACAJ)
- akta.pro secondary industries
- Hyperscale Data Center Campuses (Build-to-Suit) (HDABACAC), Renewable Integration & Energy Efficiency (PUE Optimization, Heat Reuse) (HDABAKAL)
Keywords
Where Cumulus Data is headquartered
LocationHeadquarters
- HQ city
- Sheffield
- HQ country
- United Kingdom
- HQ region
- Europe
Offices2 records
Markets served
Cumulus Data business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Infrastructure, Technology or R&D, Supply Chain, Operations, Personnel
Revenue model
- Hyperscale Data Center Colocation: Providing carbon-free power and data center infrastructure to hyperscale operators including cloud providers and AI companies
- Bitcoin Mining Joint Venture: Revenue share from Bitcoin mining operations powered by nuclear energy, operated as joint venture with TeraWulf
Go-to-market motion1 record
Distribution channels1 record
Marketing channels2 records
Cumulus Data product offering
Product offeringCore offering
Cumulus Data operated a hyperscale data center platform directly connected behind-the-meter to Talen Energy's Susquehanna nuclear power plant in Pennsylvania, providing carbon-free, dispatchable power for AI, cloud computing, and high-performance computing workloads. The platform also housed a Bitcoin mining joint venture with TeraWulf, leveraging the same nuclear power source. The Cumulus Data Center Campus was acquired by AWS in March 2024 for $650 million.
Product overview
Cumulus Data operated as a subsidiary of Talen Energy offering the Cumulus Digital Infrastructure Platform - a single, unified hyperscale data center product powered directly by nuclear energy. The platform was designed to provide carbon-free computing infrastructure for AI workloads and included a bitcoin mining joint venture component with TeraWulf. The Cumulus Data Center Campus, which housed this infrastructure at Talen's Susquehanna nuclear facility in Pennsylvania, was acquired by AWS in March 2024 for $650 million.
Differentiator
Problem solved
Functional benefit
Brands
- Cumulus Growth: Subsidiary of Talen Energy that secured the Orion Energy Partners funding for the Cumulus Digital Infrastructure Platform.
Products and services
- Cumulus Digital Infrastructure Platform
Quantifiable outcome
- Bypasses typical 5+ year grid interconnection timelines through behind-the-meter configuration
- +1 more outcomes
Companies that use Cumulus Data
Customer profileNamed customers2 records
Segments2 records
Ideal customer profiles2 records
Cumulus Data technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
Cumulus Data partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- TeraWulfcoreJoint venture partnership with TeraWulf for Bitcoin mining operations powered by nuclear energy. The venture leverages Cumulus's direct access to Talen's nuclear power generation for cryptocurrency mining.
Scale indicators4 records
Recent moves6 records
Expansion highlights4 records
Cumulus Data competitors and assessment
Company assessmentDirect peers
- Talen Energy Corporation: Parent company of Cumulus Data and the operator of the Susquehanna nuclear plant that powered the Cumulus campus. Talen is the most directly comparable counterparty, pursuing the same strategy of co-locating hyperscale AI data centers with its 2.2 GW nuclear fleet.
- Constellation Energy: Largest US nuclear fleet operator and the lead counterparty on the Microsoft/Three Mile Island restart deal. Constellation is pursuing the same behind-the-meter, nuclear-powered hyperscale data center model that Cumulus pioneered and sold to AWS.
- Energy Harbor: Nuclear and dispatchable generation operator actively marketing behind-the-meter power arrangements to hyperscale data center customers. Closely analogous to Cumulus's model of co-locating compute with carbon-free nuclear baseload.
- Vantage Data Centers: Hyperscale-focused colocation operator building large AI-ready campuses. Comparable as a buyer/operator of carbon-conscious, high-density data center capacity for the same hyperscale and AI customer base Cumulus targeted.
- TeraWulf: Bitcoin mining joint venture partner with Cumulus, operating nuclear-powered mining at Susquehanna. Directly comparable as a co-developer of the Cumulus platform and as a clean-energy Bitcoin miner.
- Compass Datacenters: Hyperscale and enterprise data center developer with build-to-suit campus capabilities. Comparable to Cumulus as a developer of purpose-built, high-density campuses for AI and cloud customers, though without the behind-the-meter nuclear anchor.
Broad incumbents
- Digital Realty Trust: One of the largest global data center REITs, serving hyperscale and AI workloads across a broad portfolio. Provides benchmark pricing, power-density, and ESG benchmarks against which any hyperscale nuclear-powered campus is evaluated.
- Equinix: Global colocation incumbent with extensive interconnection-dense facilities. While Equinix focuses on interconnection rather than behind-the-meter power, it competes for the same hyperscale and AI infrastructure budgets and is a natural benchmark for site replication.
Emerging players
- Oklo: Advanced small modular reactor developer that has signed data center power agreements. Represents the next-generation, greenfield nuclear data center model that competes with the retrofitted existing-reactor approach Cumulus used.
- X-energy: Advanced reactor developer partnered with Amazon on the Cascade Nuclear Energy Center. A direct future competitor in nuclear-powered hyperscale data center development, though focused on greenfield SMR deployment rather than existing-reactor behind-the-meter.
Market position
Strengths4 records
Weaknesses5 records
Competitive moat3 records
Key risks6 records
Key highlights7 records
Customer concentration
Cumulus Data financial estimates
Financial estimateRevenue estimate
Valuation estimate
Cumulus Data leadership team
Management profileNumber of profiles
Profiles2 records
Cumulus Data funding detail
Funding detailFunding overview
Funding rounds1 record
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Cumulus Data M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Cumulus Data
What does Cumulus Data do?
Cumulus Data operated a hyperscale data center platform directly connected behind-the-meter to Talen Energy's Susquehanna nuclear power plant in Pennsylvania, providing carbon-free, dispatchable power for AI, cloud computing, and high-performance computing workloads. The platform also housed a Bitcoin mining joint venture with TeraWulf, leveraging the same nuclear power source. The Cumulus Data Center Campus was acquired by AWS in March 2024 for $650 million.
Is Cumulus Data a public or private company?
Cumulus Data is a private company. It is classified as corporate owned and is currently acquired.
When was Cumulus Data founded?
Cumulus Data was founded in 2020. It employs 1 to 10 people.
Where is Cumulus Data based?
Cumulus Data is headquartered in Sheffield, United Kingdom, in the Europe region.
How does Cumulus Data make money?
Two revenue lines are on record. Hyperscale Data Center Colocation is the primary driver. The others are bitcoin Mining Joint Venture.
Who are Cumulus Data's main competitors?
Direct peers on record are Talen Energy Corporation, Constellation Energy, Energy Harbor, Vantage Data Centers, TeraWulf and Compass Datacenters. Broad incumbents are Digital Realty Trust and Equinix. Emerging players are Oklo and X-energy.
Does Cumulus Data have an API?
No public API is recorded for Cumulus Data.
What industry is Cumulus Data in?
Cumulus Data's product category is Hyperscale Data Center Infrastructure. Its primary akta.pro industry code is HDABACAJ, HPC / AI-Optimized Data Center Facilities, with a secondary code of HDABACAC, Hyperscale Data Center Campuses (Build-to-Suit). Its NAICS code is 518 and its SIC code is 4991.