Who’s Financing Phoenix’s Data Center Boom?

Phoenix is the fastest-growing data center market in the United States. Total deployed capacity across all facility types in Maricopa County reached an estimated 2.1 GW in 2025, with another 300 MW under construction and a planned pipeline of 2,700+ MW. Statewide, the figures are even larger: 2.4 GW deployed, 3,800+ MW planned. Of the operational capacity, roughly 600 MW is colocation and wholesale (per CBRE); the rest is hyperscaler-owned (Apple, Google, Microsoft, Meta) and enterprise. According to Data Center Dynamics, Arizona topped all states with $41 billion in data center loans committed during 2025.

We mapped 135 data center facilities in Maricopa County across every layer of the capital stack: property-level mortgage filings ($4.0B), syndicated project finance ($5.5B), CMBS ($735M), UCC filings, and corporate credit facilities ($50B+ accessible). The result: $10.3 billion in identified data center debt spread across 59 unique lenders, from Wall Street to Japanese megabanks to Korean development agencies. This analysis names every name.

Three Layers of Capital

Data center financing does not follow the traditional CRE playbook. Rather than one mortgage per property, capital flows through three distinct layers:

Above these sits a fourth layer: corporate revolvers and portfolio facilities totaling $50 billion or more across the parent companies operating in Maricopa County. Blackstone’s CyrusOne alone carries $28 billion in syndicated capacity. The largest Phoenix data centers (Compass 350 MW, Aligned 180 MW, CyrusOne 130 MW) have zero property-level debt because their financing lives entirely at the corporate level.

UCC filings confirm the linkage: Aligned’s Phoenix, Chandler, and Glendale campuses all show Toronto Dominion (Texas) LLC as collateral agent. Novva’s planned Mesa campus shows JPMorgan Chase and GLAS Americas. QTS Glendale shows both Citibank and Goldman Sachs as secured parties across 16 separate SPVs.

Layer 1: Property-Level Mortgages ($4.0B)

Big Banks Dominate Data Center Finance

Six banks with total assets exceeding $250 billion account for 73% of property-level mortgage volume in Maricopa County. Wells Fargo leads with $1.68 billion across six properties, followed by Bank of America at $578 million across six properties.

This concentration reflects the sheer scale of data center financing. A single hyperscale facility can require $300 million to $1 billion in debt. Community and regional banks rarely have the balance sheet capacity, driving borrowers to the largest national lenders and syndicated loan desks.

The Top Properties

The ten largest data center loans in Maricopa County represent $3.9 billion in exposure. Iron Mountain’s AZP-2 campus on East Van Buren Street leads at $604 million, financed entirely by Wells Fargo. STACK Infrastructure’s planned campus in Goodyear secured $469 million from Bank of America before breaking ground.

Layer 2: Syndicated Project Finance ($5.5B)

Atrium’s syndicated loan database reveals six Arizona-specific data center facilities totaling $5.5 billion. These are syndicated project finance deals arranged by global banks, with MUFG and Sumitomo Mitsui serving as administrative agents on the largest transactions. The lender syndicate is strikingly international: Korean Development Bank, Norinchukin, CaixaBank, DBS, OCBC, Bayerische Landesbank, and Commerzbank all participate.

Layer 3: CMBS / ABS ($735M and Growing)

Only one securitized data center loan surfaces in Maricopa County: the Vantage AZ11-13 campus at 45 South Bullard Avenue in Goodyear. The $735 million CMBS loan (deal: VDCM 2025-AZ) was originated in mid-2025 against a 495,654 square-foot facility at a 5.07% note rate. QTS has also tapped ABS markets, closing a $510M refi in March 2026 for its Phoenix and Richmond campuses.

The scarcity of CMBS exposure relative to the $5.5B in syndicated lending and $4.0B in mortgage filings is the finding. Data center financing remains overwhelmingly on bank balance sheets, in syndicated facilities, or in private credit vehicles. Bank regulators, not rating agencies, bear primary surveillance responsibility for the sector’s rapid growth.

Non-Bank Capital: Private Credit Fills the Gaps

Non-bank lenders account for $632 million, or 15% of recorded mortgage volume. We resolved the two largest to their ultimate sponsors:

Fund VI CRE Lender-Thistle LLC ($92M) is a lending vehicle of Pennybacker Capital, an Austin-based private equity firm focused on commercial real estate. The $91.95 million mortgage (dated May 3, 2024) was originated to ME PHX Tech Campus LLC, a Delaware entity developing the Menlo Digital MD-PHX1 campus at 4801-4811 E Thistle Landing Drive. Menlo Equities, a 30-year Silicon Valley PE firm ($9.7B cumulative AUM), is building a 5-building, 38-acre, 257 MW hyperscale campus on the former Thistle Landing office park. First shells deliver Q2 2026. A collateral assignment recorded July 24, 2024 shows Simmons Bank (an Arkansas state bank) as assignee — Fund VI pledged the deed of trust to Simmons as security for a separate $50.5 million loan. Simmons does not hold the underlying mortgage but has a security interest in it.

GLAS Americas LLC ($345M) is not a lender but an independent loan agency (Global Loan Agency Services) serving as collateral agent on a syndicated facility for Stream Data Centers’ 157-acre, 280 MW Goodyear campus. Apollo-managed funds acquired a majority stake in Stream in 2025. The actual lending syndicate behind the $345M facility is not identified in the county recording.

The remaining non-bank names resolve to familiar institutions: IXIS Real Estate Capital is the pre-2007 brand of Natixis (French bank, $71M filing). Column Financial was Credit Suisse’s CMBS conduit, now absorbed by UBS. Toronto Dominion (Texas) LLC is simply TD Bank’s U.S. lending vehicle.

The Unified View: $10.3B Across 59 Lenders

Combining mortgage filings, syndicated loan allocations (estimated by role), and CMBS origination, we can estimate each lender’s total Maricopa County data center exposure. The result reshapes the picture: the dominant lender holds $2.4B across every capital layer, but Japanese megabanks collectively hold $1.5B, and European banks another $1.7B.

The Dominant Lender: $2.4B Across Every Layer

One bank appears in every layer of the capital stack: $1.68B in property mortgages across 6 properties, $526M in syndicated facilities, and an estimated $245M in CMBS origination. UCC filings confirm this lender as secured party on multiple Vantage campuses. Total estimated exposure: $2.4 billion. Atrium subscribers can see which bank it is.

The Japanese Connection

Japanese banks hold an estimated $1.5 billion in Maricopa County data center exposure, entirely through syndicated project finance. Three megabanks lead the largest deals, with regional Japanese institutions participating. None of these banks appear in property mortgage records.

Korean and European Banks

Four Korean institutions collectively hold an estimated $400+ million. European banks from Spain, France, the Netherlands, Italy, and Germany total an estimated $1.5 billion. This international syndicate reflects data center project finance’s appeal: long-duration, high-credit-quality tenants (hyperscalers), and infrastructure-like cash flows.

The Pipeline: $60B+ in Announced Projects

The pace of new announcements in late 2025 and early 2026 has been extraordinary. Recent major projects in Maricopa County alone:

According to APS’s own rate case testimony (Docket E-01345A-25-0105, March 2026), the utility is contractually committed to serving 3,296 MW of data center load by end of 2028 and is actively negotiating an additional 16,908 MW after 2028. Combined, that is 20,204 MW — more than 200% of Arizona’s current 8,200 MW system peak. Each new facility is likely 200 MW or larger. If just 1,000 MW of the committed capacity becomes stranded after 15-year contracts expire, APS estimates $75 million per year in stranded costs. Applied to the full negotiation pipeline: $460 million per year.

The Potter/Reynolds-Madsen testimony (same docket) reveals APS’s proposed subscription model: 1.2 GW of initial guaranteed capacity, with financial security requirements of $750 million per 100 MW of requested service. Subscribers must agree to long-term bilateral contracts with fixed and variable charges. The testimony warns that “a downturn in the tech sector or a facility closure could leave existing ratepayers to cover billions of dollars of infrastructure built solely to serve a single, large load.” The potential rate increase to fund data center infrastructure projects: up to 19%.

The Regulatory Headwinds

Governor Hobbs has called for ending Arizona’s 10-year data center sales tax exemption, arguing it has served its purpose. The incentive costs the state approximately $38 million per year in foregone revenue. Chandler City Council unanimously rejected a data center rezoning request after public backlash. A penny-per-gallon fee on data center water use has been proposed. The "No Desert Data Center Coalition" is actively organizing against new projects.

The bigger constraint is power. Phoenix has 1,300 MW under construction and nearly 4,700 MW planned. Utility backlogs and grid capacity, not water or permitting, are now the binding constraint on new supply.

For bank lenders, the question is whether the current construction pipeline can be absorbed by tenant demand. Supply is growing faster than at any point in the sector’s history, and tenant credit is heavily concentrated in four hyperscalers (Google, Meta, Microsoft, Amazon) who collectively accounted for 73% of new leasing in 2025.

Risk 1: The Power Grid Is the Binding Constraint

APS currently serves approximately 350 MW of data center load. But 4,000 MW of XHLF (Extra High Load Factor) customers are in construction or coming online, with another 10,000 MW in the queue. APS has publicly stated: “We do not have the energy and transmission infrastructure to support the amount of energy that’s being requested of us.” Data centers accounted for 94% of APS demand growth from 2023 to 2025.

APS has 16,000 MW of data center demand in its interconnection pipeline. To put that in perspective, 16 GW is roughly the electricity consumption of 12 million homes.

The Potter/Reynolds-Madsen testimony reveals APS’s proposed subscription model: 1.2 GW of initial guaranteed capacity, with financial security requirements of $750 million per 100 MW of requested service. Subscribers must agree to long-term bilateral contracts with fixed and variable charges. The potential rate increase to fund data center infrastructure projects: up to 19%.

SRP needs to double its generation capacity within 10 years. APS has proposed building a 2 GW gas plant (Desert Sun) under a subscription model where data centers finance their own capacity. Meanwhile, APS’s 2025 rate case proposes a 45% rate increase for XHLF data center customers. If approved, this directly impacts operating costs for every facility in APS territory.

The lender risk: If APS cannot deliver power on the timeline operators need, construction-financed facilities sit idle. The Vantage AZ11 syndicated loan ($600M) matures March 31, 2026. Brookfield’s Phoenix DC revolver ($500M) matures December 2026. That’s $1.1B in data center debt maturing this year in a market where the utility says it cannot keep up with demand.

Risk 2: The Maturity Wall

Risk 3: Water in a Desert

The industry has largely solved the water problem through engineering. Nearly every facility built since 2023 uses air-cooled or closed-loop zero-water cooling. But the legacy facilities and the sheer scale of the pipeline still matter.

Four cities have enacted data center water regulations. Chandler was first in 2015: 115 gallons per 1,000 SF per day. Mesa caps large users at 330 acre-feet per year and has required developers to bring their own water (Meta purchased Gila River credits; large users have contributed 7,800 acre-feet to the city). Phoenix adopted a Large Water User Ordinance in 2024. Goodyear negotiates case-by-case (Microsoft’s $36M wastewater plant contribution).

The Ceres Foundation projects Phoenix-area data center water consumption will grow from ~385 million gallons per year today to 3.7 billion gallons within six years. But the bigger risk is indirect: the electricity to power these facilities requires its own water. Natural gas power generation consumes roughly 2,800 gallons per MWh. As APS builds gas plants to serve data center load, total water impact could be 5-10x the direct cooling usage.

Risk 4: Regulatory and Political

Governor Hobbs has called for ending Arizona’s 10-year data center sales tax exemption, arguing it has served its purpose. The incentive costs the state approximately $38 million per year in foregone revenue. The ACC opened a formal data center inquiry (Docket E-00000A-25-0069) in April 2025 to ensure infrastructure costs are not shifted to residential ratepayers. APS’s proposed 45% XHLF rate increase (Docket E-01345A-25-0105) is pending. Chandler unanimously rejected a rezoning request after public backlash. The “No Desert Data Center Coalition” is actively organizing.

The bigger constraint is power. Phoenix has 1,300 MW under construction and nearly 4,700 MW planned. Utility backlogs and grid capacity, not water or permitting, are now the binding constraint on new supply.

The Attorney General has challenged the ACC’s approval of Project Blue (a 286 MW data center in Tucson), filing an appeal in January 2026 seeking to vacate the decision. If successful, this could set a precedent that slows approvals statewide.

For bank lenders, the question is whether the current construction pipeline can be absorbed by tenant demand. Supply is growing faster than at any point in the sector’s history, and tenant credit is heavily concentrated in four hyperscalers (Google, Meta, Microsoft, Amazon) who collectively accounted for 73% of new leasing in 2025.