Private Equity Owns Under 4% of U.S. Hospitals, Study Finds

TL;DR: A WashU study finds private equity owned 3.5% of U.S. short-term acute care hospitals in 2024, and about two-thirds of acquired hospitals changed owners again within five years. If you're pitched a healthcare fund, hospitals are a small, short-held corner of private equity, and the harm studies still deserve your attention.

On October 16, 2026, researchers at Olin Business School at Washington University in St. Louis published a study of private equity in hospitals. According to WashU's newsroom, "in 2024, private equity firms owned 3.5% of short-term acute care hospitals, representing 2.5% of hospital beds and 1.8% of inpatient discharges." I spent years as a Navy quality assurance supervisor signing off on work where one wrong number could kill someone, and the habit stuck: verify before you trust, and check the denominator first. This study is a good case for it.

How many hospitals does private equity actually own?

Fewer than the headlines imply. WashU says the researchers identified 556 short-term acute care hospitals acquired through 139 private-equity deals between 2000 and 2024. Spread over twenty-four years, that is a modest number of deals in a very large system.

One deal moved the whole line. The same report says the 2006 acquisition of Hospital Corporation of America (HCA), then the nation's largest for-profit hospital chain, drove a five-year sharp increase in private-equity ownership. When HCA went public again in 2011, the share dropped. Take HCA out and ownership grew from nearly zero in 2000 to about 2% in 2011, then stayed between 2% and 4%. If you've ever looked at a PE track record and wondered how much of it was a single position, it's the same question at industry scale.

Do private equity firms hold hospitals for long?

Usually not. WashU reports that following transactions over time showed "about two-thirds of acquired hospitals changed ownership again within five years of an initial acquisition."

That fits a buyout fund, which has to return cash to its limited partners on a schedule. I walked through what that clock does to your money in how the PE secondaries market works and in why vintage year shapes returns.

Why does one study give three different percentages?

Because the denominator changes. WashU puts private equity at 3.5% of short-term acute care hospitals, 2.5% of hospital beds and 1.8% of inpatient discharges. Each is accurate, and each answers a different question.

Any other count of PE-owned hospitals you run into will differ for the same reason. A share of all hospitals, a share of acute care hospitals and a share of for-profit hospitals are different questions, so check which one a number answers before you compare it with another.

Source	What it counts	Figure
WashU / Olin Business School	Short-term acute care hospitals, 2024	3.5% owned by PE
WashU / Olin Business School	Hospital beds, 2024	2.5% in PE-owned hospitals
WashU / Olin Business School	Inpatient discharges, 2024	1.8% in PE-owned hospitals

Counted by hospitals the share is small. Counted by patients discharged, it is smaller still.

Does a small share settle the patient-harm debate?

No, and the study doesn't claim it does. WashU measures who owns hospitals, not how patients fare, so it neither confirms nor refutes the outcome research. A small footprint can still hurt the people inside it.

Healthcare is also a sector where leverage, staffing and short holding periods meet something that can't be repriced. A sponsor pitching you a healthcare roll-up still has to answer for that, and an ownership share doesn't answer it for them.

What does this mean for an accredited investor?

Three things, in my view. First, check the denominator whenever a sponsor quotes a share. WashU's 3.5% of hospitals and its 1.8% of discharges both describe the same hospitals, and a pitch will pick whichever number suits it.

Second, short holds put exit timing and the buyer's price ahead of the operating story. If two-thirds of acquired hospitals change hands within five years, ask who the sponsor expects to sell to. Third, returns aren't a given: Boston College Law School Magazine notes that over roughly the past five years private equity returns have not kept pace with the S&P 500.

If you're weighing a fund with healthcare holdings, the 12-point fund evaluation checklist is where I'd start.

Common mistakes when reading this kind of headline

The first mistake is comparing two percentages without checking what each is a percentage of. WashU's 3.5% of hospitals and 1.8% of discharges are not interchangeable.

The second is treating an ownership study as an outcomes study. Knowing how many hospitals PE owns tells you nothing about whether patients do better or worse there.

The third is letting one large deal stand in for a trend. HCA moved the national line for five years, and a single position can do the same inside a fund.

FAQ

What are the current trends in private equity? Short holds, at least in hospitals. WashU found about two-thirds of acquired hospitals changed owners again within five years. Boston College Law School Magazine adds that PE returns have trailed the S&P 500 over roughly the past five years.

Who owns hospitals in America? Mostly not private equity. WashU puts PE at 3.5% of short-term acute care hospitals in 2024, and says most Americans live in hospital markets without a PE-owned hospital.

What healthcare companies are owned by private equity? The WashU study counts 556 short-term acute care hospitals acquired through 139 PE deals between 2000 and 2024, but a share of those have since changed hands. I haven't verified a current list of names, so check the hospital's own ownership disclosures before relying on a summary.

Does private equity ownership make hospital care worse? The WashU study doesn't say. It measures ownership, not patient outcomes. Outcome research is a separate body of work, and you should read it directly before accepting any sponsor's claim either way.

The Bottom Line

Pick one private fund you've been pitched and ask the sponsor for its holding period on its last five exits and how much of its reported return came from its single largest deal. If they can't answer in writing, you've learned what you needed to know. For a weekly read in this spirit, sign up for the free AIN briefing.

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