This is an explainer, not financial advice. Few forces have reshaped modern business as quietly, or as completely, as private equity — and few are as hotly argued over, as a recent Guardian explainer on the industry underlined.

What private equity is

A private equity (PE) firm raises money from investors — pension funds, insurers, wealthy individuals — and uses it to buy companies. The aim is to improve or grow the business, then sell it at a profit, typically within about five to seven years. A defining feature is leverage: firms fund their purchases partly with borrowed money, loading debt onto the company they acquire to amplify potential returns. Managers are paid through a mix of management fees, usually a small percentage of the money committed, and "carried interest" — a share, often around a fifth, of the profits they generate.

The case for

Defenders argue that PE plays a useful role. It channels capital to businesses that banks might shun, and brings management expertise, fresh investment and a discipline that can turn around struggling firms. The returns, supporters note, do not just enrich financiers: pension funds and other big institutions invest in PE precisely because it has, over time, delivered strong gains that help pay for millions of people's retirements. When a turnaround works — cutting waste, fixing operations, funding expansion — the result can be a healthier company and profits for its backers.

The case against

Critics see a model whose incentives can pull against the interests of workers, customers and the businesses themselves. The debt used to buy a company sits on its books, leaving less room for investment and raising the stakes if trade dips. The pressure to deliver returns within a few years, they argue, can drive aggressive cost-cutting, job losses and a focus on short-term gains over long-term health, while practices such as selling off a company's property and renting it back can strip out value. Particular unease surrounds PE's growing presence in sensitive sectors — health care, care homes, housing and veterinary services — where the pursuit of profit can rub against the public interest.

A test case: Britain's vets

The UK veterinary market has become a flashpoint. Corporate groups, many of them backed by private equity, now own around 60% of vet practices, up from roughly 10% a decade ago, after a wave of acquisitions rolled small clinics into a handful of large chains. In March 2026, Britain's Competition and Markets Authority concluded a lengthy investigation, finding that pet owners often faced weak competition, unclear pricing and a lack of transparency about who owned their local surgery. It ordered a package of reforms, including published price lists, written estimates for treatments costing £500 or more, caps on prescription fees, a public register of practice ownership, and notification of future acquisitions so regulators can watch for further consolidation.

Where it leaves us

The vet inquiry captures the broader tension. Private equity can supply capital and efficiency that businesses genuinely need; left unchecked, critics warn, it can also concentrate markets and squeeze quality. Regulators in Britain and beyond are increasingly scrutinizing PE's roll-ups and debt, especially in essential services. Whether the model is, on balance, a force for renewal or for extraction is a question on which reasonable people — and the evidence — still divide.