What is private equity?
Private equity refers to ownership stakes in companies not traded on public exchanges. The mechanics differ from public investing in one fundamental way: private equity managers do not simply select securities; they influence outcomes. Value is created through operational improvement, revenue growth, margin expansion, strategic repositioning, and less prominently today than in past decades, financial engineering, meaning the use of debt to amplify equity returns.
Because ownership is concentrated and holding periods are long, the manager's operating skill is embedded directly in the return. That is the source of both the asset class's appeal and its dispersion; a theme Chapter 3 develops in detail.
The multi-stage spectrum
Private equity spans the full life cycle of a company. Three broad stages define the spectrum.
- Venture capital backs early-stage companies, often before profitability and sometimes before revenue. It carries the highest dispersion of outcomes: a small number of investments typically drive the majority of returns, and many investments return less than invested capital.
- Growth equity invests in scaling companies that are profitable or approaching profitability. These businesses have proven products and revenue but need capital to expand. Risk is lower than venture; return potential remains meaningfully equity-like.
- Buyout acquires mature companies, usually with control positions and often using leverage. Returns depend on operational improvement and, historically, on the productive use of debt.
A multi-stage private equity approach diversifies across this life cycle rather than concentrating in one stage. The logic is straightforward: different stages respond differently to economic cycles, financing conditions, and exit environments, and blending them can smooth a private equity allocation's path without abandoning its return drivers.
How managers create value today
The economics of private equity have shifted. Bain & Company's 2026 Global Private Equity Report describes the change : during the "golden decade" of the 2010s, a typical buyout needed only about 5% annual EBITDA growth to reach a target 2.5x return over a roughly five-year hold. Today's deals require sustained double-digit growth to achieve the same outcome; a shift Bain summarizes as "12 is the new 5."5 Cheap debt and expanding valuation multiples once did much of the work. Now operational value creation, real revenue growth, and real margin improvement have to carry the return.
The same report highlights why discipline matters on the way out as well as the way in: global buyout deal value surged to about $904 billion in 2025, yet distributions to limited partners as a percentage of net asset value remained at 14%, below 15% for the fourth consecutive year, with roughly 32,000 unsold companies valued near $3.8 trillion awaiting exits.5 For advisory firms, the lesson is not that private equity is broken. It is that manager skill, entry discipline, and exit planning matter more than they did a decade ago.
Key terms defined
A few terms recur throughout this guide and deserve plain-English definitions up front.
- Vintage: the year a fund makes its first investment. Funds are compared against their vintage-year peers, not against funds started in different years.
- Carried interest: the manager's share of profits above a defined hurdle, typically the manager's primary incentive.