Can a C Corporation Own 100% of a REIT? Captive REITs and the Data-Center Boom

Here's a question I didn't expect to field more than once in a career: can a C corporation own 100% of a REIT? It's come up repeatedly this year, and the reason is obvious once you follow the money — the AI build-out has technology companies pouring historic sums into data centers, data centers are real estate, and REITs are the tax code's preferred home for real estate. The short answer is yes, effectively. The structure even has a name: the captive REIT. The long answer is where it gets interesting.

What a REIT actually is

A real estate investment trust is a corporation or trust that elects a special tax regime. To keep it, the entity has to stay genuinely real-estate-flavored — the tests are detailed, but the theme is that at least 75% of what it owns and earns must be tied to real property — and it must pay out at least 90% of its taxable income to shareholders every year as dividends. In exchange, the REIT deducts the dividends it pays. Distribute everything, and the entity-level corporate tax essentially disappears: the income is taxed once, at the shareholder level, instead of twice.

So can one company own the whole thing?

Effectively, yes — with an asterisk. A REIT needs at least 100 shareholders starting in its second year, and that test counts the names on the shares, not the people standing behind them. A parent corporation holding every share is one shareholder, full stop. The standard fix is almost anticlimactic: the REIT issues a small class of preferred stock to a hundred or so individuals (often executives or accommodation investors collecting a token dividend) while the parent keeps essentially all of the common stock and all of the economics.

The second ownership rule, the 5/50 test, says no five or fewer individuals can own more than half the REIT's value during the last half of the year — and this one does look through entities to actual human beings. That sounds fatal for a wholly owned subsidiary, but it's the opposite: look through a publicly traded parent and you find millions of dispersed shareholders. No five individuals own half of a public company, so no five individuals constructively own half of its REIT.

Why captive REITs got famous — and why states got angry

The classic captive REIT play, popular with big retailers and banks in the 1990s and 2000s, went like this: put the company's own stores or branches into a REIT subsidiary, have the operating company pay it rent, deduct the rent, and let the REIT's dividends-paid deduction erase the income on the other side. In states where each entity filed its own return, income could effectively vanish. States noticed. A long list of them now has captive-REIT statutes that disallow the dividends-paid deduction for non-publicly-traded REITs controlled by a single corporation, and combined reporting closes the gap in most of the rest. If someone pitches you the 2005 version of this structure, the states have already seen it.

The fine print that decides whether it works

• No dividends-received deduction. The deduction that normally softens corporate-to-corporate dividends is specifically denied for REIT dividends. The REIT deducts what it pays out, but the parent picks up the full dividend as taxable income — so at the federal level, the round trip is closer to a wash than a windfall. The historical juice was almost always state tax.
• Related-party rent. Rent from a tenant with 10%-or-more overlapping ownership generally doesn't count as qualifying REIT income. A parent renting its own buildings back from its own REIT runs straight into this — it's the central engineering problem of every captive structure, and the exceptions (including certain arrangements involving a taxable REIT subsidiary) are narrow and condition-heavy.
• The 90% payout is real cash, every year. A REIT can't quietly retain earnings to fund the next phase of construction the way a C corporation can.
• Servers aren't real estate. Data-center buildings can qualify as real property — the IRS has treated them that way in private rulings, and large publicly traded data-center REITs exist. But the GPUs and networking gear inside are personal property, and rent attributable to personal property qualifies only within tight limits. In an AI facility, the equipment is often worth more than the building, which makes the lease design the whole ballgame.
• Appreciated property carries a toll charge. Moving long-held, appreciated real estate into REIT form can drag built-in-gain rules along with it.

Why the biggest players mostly haven't

For an integrated cloud or AI business, the income tests cut against the business model: a REIT has to stay a landlord, and it can't also be the compute provider. Separating those roles means arm's-length leases, real governance, and real friction. That's why the versions that have actually worked tend to be public — companies like Iron Mountain and MGM converted to or spun real estate into publicly traded REITs, which sidesteps the state captive-REIT statutes (they carve out publicly traded REITs) and replaces shareholder-count workarounds with genuine public float. Whether that trade is worth it is a question you answer with modeling, on your own facts.