Private Equity’s Data Center Empires: Blackstone, KKR, Brookfield, DigitalBridge and More

Private equity data center platforms sit behind much of the capacity that AWS, Microsoft, Google, Meta and the AI labs rent. Infrastructure and buyout firms such as Blackstone, KKR, Brookfield, DigitalBridge, BlackRock’s GIP, Blue Owl, EQT and Macquarie have spent hundreds of billions of dollars buying and building wholesale data center companies. This guide profiles the main investors and their platforms, the landmark deals and valuations, and how the model works, using deals reported through October 2026. It is part of the Kurums Data Center Economy hub. For deal values in more detail, see the biggest data center M&A deals. For the operating side, see our ranking of the largest colocation providers.

Why have private equity firms piled into data centers?

Private equity and infrastructure funds like data centers because they offer long contracted leases, often 10–15 years, with creditworthy hyperscale tenants, combined with very strong demand growth. That pairing of bond-like income and growth-stock expansion is rare in real assets.

The opportunity is large because the hyperscalers lease a big share of their capacity rather than building everything. Synergy Research Group estimates that nearly 60% of hyperscale capacity is in owned, self-built facilities, so roughly 40% is leased, much of it from wholesale developers owned by private capital. Synergy expects hyperscale capacity to more than triple by 2031. Every gigawatt leased rather than self-built needs a landlord with access to billions of dollars of construction capital.

Investment has risen to match. S&P Global Market Intelligence data, cited by Datacentres.com, put US data center private equity investment at $45.7 billion in 2025, the highest in at least five years. Big Tech’s own budgets, profiled in our AI capex supercycle analysis, give investors confidence that leases will be filled. The flip side is that platforms carry large debts and depend on a few very large tenants.

What are the biggest private equity data center deals?

The landmark private deals are Aligned (about $40 billion, 2026), AirTrunk (over A$24 billion, about US$16 billion, 2024), CyrusOne ($15 billion, 2022), ST Telemedia Global Data Centres (about S$13.8 billion EV, 2026), Switch ($11 billion) and QTS (about $10 billion, 2021).

Valuations have climbed with each wave. When Blackstone agreed to buy QTS in 2021, the price of about $10 billion made it one of the largest data center deals ever. Three years later, Blackstone’s AirTrunk purchase was larger, and in 2026 the Aligned deal roughly quadrupled the QTS price tag. The rise reflects both AI demand and the scale of development pipelines buyers now pay for: Aligned was valued on about 6.4 GW, much of it not yet built.

Source: Datacentres.com deal tracker (2026); Wikipedia entries for Blackstone, AirTrunk, CyrusOne and DigitalBridge citing company announcements; company press releases.

How big is Blackstone’s data center empire?

Blackstone owns QTS in the United States and AirTrunk in Asia-Pacific, two of the largest wholesale platforms in the world. AirTrunk alone has more than 3 GW of operating and planned capacity across Australia, Japan, Singapore, Malaysia, Hong Kong and India.

QTS has grown quickly since Blackstone bought it. ABI Research ranked it the second-largest US colocation operator by active IT load in 2025, at about 811 MW across 33 sites, behind only Equinix. Lambda Finance estimated QTS’s global operating capacity at about 1.5 GW as of early 2026. QTS funds part of its growth through asset-backed securities, including an $870 million securitisation refinancing in June 2026.

AirTrunk is expanding aggressively under Blackstone. In March 2026 it closed a ¥191.6 billion (about US$1.24 billion) green loan for its TOK1 campus in Tokyo, described as Japan’s largest data center financing. In April it announced the acquisition of Indian developer Lumina CloudInfra, which has 600 MW of planned capacity, and in June it unveiled plans for a 3 GW campus in Raigad near Mumbai, with planned investment of about $21 billion.

Blackstone is also active as a seller and capital recycler. In June 2026 it sold its stakes in three Northern Virginia data centers, totalling 288 MW, to Digital Realty in a transaction with a $7.8 billion gross asset value. In April it was reported to be weighing an IPO of a Blackstone digital infrastructure trust of about $2 billion. These moves show a mature strategy: build or buy, lease up, then sell or list stabilised assets to fund the next phase. Our guide to Asia-Pacific data center investment covers AirTrunk’s markets.

What does KKR own in data centers?

KKR co-owns CyrusOne with Global Infrastructure Partners, bought for $15 billion. In September 2026 it completed, with Singtel, the buyout of the remaining 82% of ST Telemedia Global Data Centres for S$6.6 billion, valuing the business at about S$13.8 billion.

CyrusOne operates more than 40 carrier-neutral data centers in North America, Europe and Asia. Lambda Finance estimated its operating capacity at about 1.2 GW in early 2026, and ABI Research put its active US IT load at about 674 MW in 2025. ST Telemedia Global Data Centres gives KKR and Singtel a large Asia-Pacific and India footprint at a time when Johor, Mumbai and Tokyo are among the fastest-growing markets.

KKR has also launched new vehicles. In June 2026 it set up Helix Digital Infrastructure with more than $10 billion of committed capital, and in September Samsung affiliates committed $1 billion to HelixSix, a KKR-founded platform. KKR also profits along the supply chain: it sold liquid-cooling specialist CoolIT Systems to Ecolab for $4.75 billion in a deal agreed in March 2026.

How did BlackRock, GIP and MGX end up owning Aligned?

Aligned was bought by the AI Infrastructure Partnership (AIP), BlackRock’s Global Infrastructure Partners and Abu Dhabi’s MGX, from Macquarie Asset Management. The roughly $40 billion deal, the largest data center acquisition on record, closed on 21 July 2026.

AIP is a BlackRock-led consortium created in 2024 to invest in AI data centers and energy, with Microsoft, MGX and Nvidia among its partners. BlackRock became a data center heavyweight when it acquired GIP, which already co-owned CyrusOne. Buying Aligned gave the group a platform with about 6.4 GW of capacity across the United States and Latin America.

Aligned has kept building since the deal. In April 2026 it broke ground on Project Caprock in Texas, a planned $5 billion, 540 MW campus, and in September it started work on Project Phoenix in Pennsylvania, planned at 2 GW. In July it upsized an asset-backed securitisation to about $1.18 billion, roughly 30% above target. GIP is also an 80% partner with Meta on a roughly 1 GW campus in El Paso, Texas, with about $14 billion of development costs. MGX’s role links this deal to the Gulf’s AI ambitions, covered in our Gulf data center analysis.

What is DigitalBridge’s role and why did SoftBank buy it?

DigitalBridge is a digital-infrastructure asset manager whose funds back Vantage Data Centers, Switch, DataBank and other platforms. SoftBank agreed in December 2025 to buy DigitalBridge for about $4 billion, and completed the deal on 30 September 2026.

DigitalBridge managed about $106 billion of assets in mid-2025. Its funds, with partners, took Switch private for $11 billion. It led a $9.2 billion equity investment in Vantage alongside Silver Lake in 2024, recapitalised DataBank, and agreed in 2024 to acquire hyperscale developer Yondr. Vantage remains one of the biggest private wholesale developers, and in September 2026 it added a $2 billion revolving credit facility.

SoftBank’s purchase brings an AI-focused strategic owner into the private data center world. SoftBank is also a partner with OpenAI and Oracle in the Stargate project. Owning the manager rather than individual assets gives SoftBank influence over a portfolio of platforms that lease to hyperscalers and AI labs. The deal also shows how the line between financial investors and technology companies is blurring, a theme we explore in how to invest in data centers.

What are Brookfield, Blue Owl, EQT and the other investors doing?

Brookfield, Blue Owl, EQT, Macquarie, Silver Lake and large pension and sovereign funds are all major data center investors. Blue Owl has become the go-to partner for off-balance-sheet hyperscale projects, most notably Meta’s Hyperion campus in Louisiana.

Blue Owl’s special-purpose vehicle owns 80% of the Hyperion joint venture, with Meta holding 20%. Global Data Center Hub reports roughly $28.8 billion of committed capital and $27.3 billion of vehicle debt arranged by Morgan Stanley. Meta confirmed in July 2026 that Hyperion will scale to 5 GW. Blue Owl also backs STACK Infrastructure through its digital infrastructure platform (formerly IPI Partners). ABI Research estimated STACK’s active US IT load at about 410 MW in 2025.

Brookfield’s data center activity spans Europe, the Americas and Asia. Its Brookfield-backed operator Centersquare bought ten North American data centers for an enterprise value of $1.0 billion in October 2025. In September 2026 Brookfield agreed to buy a minority stake in American Real Estate Partners, which is developing more than 32 million square feet of hyperscale data centers and has deployed or committed over $30 billion. Brookfield also signed a framework with Microsoft in 2024 to develop about 10.5 GW of renewable power, showing how infrastructure investors bundle power and data center exposure. EQT owns EdgeConneX, estimated at about 0.72 GW of operating capacity, while Macquarie has been a seller after building Aligned and AirTrunk stakes. See how data centers are financed for the joint-venture structures.

How do private equity firms make money on data centers?

Private equity firms make money by buying or building platforms, leasing new capacity to hyperscalers at attractive yields, financing completed buildings cheaply through debt and securitisation, and eventually selling or listing the platform at a higher valuation per megawatt.

The core value creation is development. A wholesale developer secures land and power, signs a long lease with a hyperscaler before or during construction, then builds. Once leased and operating, the building can be refinanced with cheaper debt, for example through asset-backed securities like those issued by QTS and Aligned in 2026. That frees equity for the next project. The platform’s value rises with each stabilised megawatt, and exits come through sales to larger investors, listings or partial stake sales.

The model works best when tenants are creditworthy and leases are long. It is weakest when projects slip or tenants change plans. Because the biggest tenants are also the companies driving the AI boom, private platforms are effectively a leveraged bet on continued hyperscale demand, discussed in the bubble debate. For the market-size outlook that underpins these valuations, see our 2030 forecast.

What does the future hold for private capital in data centers?

Expect larger deals, more co-investment from sovereign funds and tech companies, more joint ventures with hyperscalers, and more listings of mature portfolios. Power access and AI demand will decide which platforms keep their premium valuations.

The 2026 pattern points in this direction. MGX co-led Aligned. Samsung committed $1 billion to a KKR-founded platform. Meta and Blue Owl structured Hyperion as a joint venture. Blackstone weighed a listed trust. Fundraising for new digital infrastructure vehicles, such as KKR’s Helix, continues even at record valuations. At the same time, investors are funding the supply chain. Ecolab’s $4.75 billion purchase of CoolIT from KKR shows that cooling and power equipment can be as profitable as the buildings themselves.

The main uncertainty is whether AI demand keeps pace with the gigawatts being financed. Bulls point to hyperscaler backlogs of hundreds of billions of dollars and Synergy’s forecast that hyperscale capacity will triple by 2031. Bears warn that platforms bought at about $40 billion assume flawless execution. Our supply chain guide covers the equipment side of the same boom.

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