Data center IPOs hand construction risk back to public equity

Two listed data center companies stood on public exchanges in 2022, the residue of a take-private run that began with Blackstone's $10 billion purchase of QTS in 2021 and pulled CyrusOne, CoreSite and Switch off the boards within months. Bisnow counts nearly a dozen data center companies that have since gone public, filed for an IPO or been reported to be exploring one, and the pace of that reversal accelerated over the past three months: Blackstone Digital Infrastructure Trust, Brookfield-backed colocation provider Csquare and the Texas startup Fermi have listed, Switch and Singapore-based DayOne have filed confidentially, SoftBank-backed SB Energy has filed publicly, Nscale is reportedly preparing a listing, and Vantage Data Centers, CyrusOne, Blue Owl, DataBank and EdgeCore are all reportedly at least exploring one.

The queue itself carries more information than its length, holding a trust, a colocation platform, an AI data center specialist and two companies that private capital bought outright during the last cycle. David Guarino, who heads global data center and tower research at Green Street, told Bisnow there is no single reason behind the shift, that there is "not one blanket answer," and that construction requirements have grown so large that "everyone's getting creative to find new ways to attract capital."

Reading the swing as the take-private trade unwinding gets the risk backwards. The buyers of 2021 underwrote in-place colocation leases, contracted revenue from tenants whose credit supported a low cap rate and therefore a stable appraisal, while much of what the current filings offer public equity is the phase before that revenue starts—campuses that require years of investment before producing income and pay out in lumps as they lease up, the profile Bisnow attributes to the single-tenant model now driving sector growth.

That migration is what emptied the exchanges: sector growth moved from multitenant colocation, which produced the listed data center REITs of the prior decade, to large-scale campuses built for a handful of cloud tenants, among them Amazon Web Services, Microsoft and Google, and the AI race has accelerated the shift. Campuses of that kind take years to build and lease, a duration that suits permanent capital better than a closed-end fund with a term.

The offerings differ in what they own as much as in how they raise: a trust, a colocation platform and an AI-focused operator do not share a tenant base or a lease profile, and Bisnow's reporting quotes industry leaders saying the scale of the capital requirement is what unites them rather than any single strategy. That matters for allocators, because a fund buying data center exposure through private real estate owns a building and a lease, and not every listing in this wave will offer the same thing; an AI-focused operator's filing will define a business that may not look like real estate at all. Listings force sponsors to describe what they sell, which is why the public market prices these distinctions before private funds do; the comparables that eventually flow back to private portfolios will be drawn from a mix of models rather than one clean sector multiple.

For private real estate, the immediate stake is the mark. Data center portfolios held in private vehicles have had thin listed comparables since the sector's exchange count fell to two in 2022, leaving appraisals and sponsor judgment to carry the number. As this publication argued when Blue Owl's data center REIT surfaced, a $6.5 billion seed would put a public number on private data center valuations, and Blue Owl now sits among the names Bisnow lists as exploring a listing. Vehicles that price at or near what private owners carry validate marks those owners have defended since the comparables thinned, and vehicles that price below the private bid put the discount on the funds still holding the assets and on the appraisals supporting their debt.

Capital formation, though, is not the constraint this sector runs into next. County-level permitting, rather than power or land, binds the next data center wave, and the $73 billion build-out will reward the sponsors who secure substations rather than steel. An equity market willing to fund years of pre-revenue construction does not shorten an interconnection queue or move a county board's calendar; it changes who carries the wait. Set against the debt already committed — Atrium's mapping of U.S. data center development debt, published in August, counted $1.3 trillion across county filings, CMBS trusts, bank syndications and utility credit — the equity raised this year is the layer of the stack whose value depends directly on a delivery schedule set by approvals. That is an uncomfortable place for daily-priced capital, and a defensible one only while the market keeps paying for growth.

Switch and CyrusOne were taken private in the last wave and are both now considering a return, which makes their pricing an external verdict on the 2021 bid and, by extension, on every private data center appraisal written since the exchanges emptied. Confidential filings mean nothing prices until an offering goes effective, and some of the companies on this list may never get there. When those two do, private marks that have stood since 2022 meet a number no sponsor set.