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An Introduction to Private Equity Co-Investing

Reported by Fundresearch
Aug 6, 2026· 2 min read
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Key Takeaways
  • • Private equity assets under management have expanded dramatically over two decades, growing 13x from $744 billion in 2004 to $9.7 trillion as of December 2024, establishing PE as one of the fastest-growing alternative asset classes alongside private credit, real estate, and infrastructure.
  • • Private equity is defined as equity or equity-like investments into private companies and assets not publicly traded, with general partners (GPs) functioning similarly to mutual fund managers but holding portfolio companies for multi-year periods before exiting via negotiated sale or IPO.
  • • PE fund managers construct long-only portfolios of privately held companies—a structural contrast to hedge funds—and seek to deliver portfolio-wide gains through value creation over holding periods typically spanning several years.
  • • Three primary private equity strategies exist: buyout, growth equity, and venture capital, each serving distinct investment objectives within the broader PE universe.
  • • Private equity co-investments enable investors to participate directly in private company stakes alongside a GP sponsor, typically as minority equity investors, offering an alternative entry point to traditional PE fund commitments.
Summary
Private equity has emerged as one of the most rapidly expanding segments within alternative investments, with assets under management reaching $9.7 trillion as of December 2024—a thirteen-fold increase from $744 billion in 2004. This expansion reflects institutional and high-net-worth investor appetite for illiquid, equity-based exposure to private companies and assets outside traditional public markets.

Private equity investments involve acquisition of equity or equity-like interests in non-publicly traded companies or assets. General partners, who manage PE funds, operate similarly to traditional mutual fund managers in portfolio construction methodology but differ fundamentally in asset composition and holding strategy. Unlike mutual fund managers who manage liquid public equities, PE general partners acquire long-only interests in privately held companies, which they typically retain for multiple years before engineering exits. These exits occur through negotiated sales or initial public offerings, with GPs targeting portfolio-wide gains as the primary return driver. The multi-year holding periods and illiquidity characteristics of PE funds distinguish them significantly from both public equity and hedge fund structures.

The private equity market encompasses three primary strategies: buyout, growth equity, and venture capital. Each addresses distinct investment profiles and company lifecycle stages, allowing investors to tailor exposure based on risk-return objectives and portfolio construction requirements.

Co-investing represents a specialized approach within private equity, enabling investors to deploy capital directly into private company stakes alongside a controlling GP sponsor, typically in a minority equity capacity. This structure provides institutional investors and family offices direct equity participation while retaining the expertise and operational oversight of the sponsoring general partner. Co-investments have become increasingly relevant for sophisticated investors seeking granular exposure to specific portfolio companies without committing to broader fund partnerships or accepting the higher fees associated with pooled fund structures.

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Sources

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Fundresearch An Introduction to Private Equity Co-Investing