For decades, if a mid-sized company needed $500 million to fund an acquisition, it called a bank. Today, it increasingly calls Apollo, Ares, or Blackstone. The private credit market — once a niche corner of alternative finance — has crossed $2 trillion in assets under management, a milestone that marks a structural realignment of corporate lending across the developed world.
The speed of this growth has surprised even its proponents. A decade ago, the total market was estimated at under $400 billion. As of Q1 2026, data compiled by Preqin and the Alternative Credit Council puts global private credit AUM at $2.1 trillion, with projections from BlackRock and Morgan Stanley suggesting the market could reach $3.5 trillion by 2030.
How Banks Stepped Back and Private Lenders Stepped In
The structural drivers of private credit’s expansion are not mysterious. Following the 2008 financial crisis, tightening bank capital requirements under Basel III and subsequently Basel IV constrained traditional banks’ appetite for leveraged lending. Regulators pushed banks to hold more capital against risky loans, reducing their return on equity in the process. The economics of direct lending — charging premium rates without the constraints of public market disclosure or syndication timelines — became increasingly attractive for alternative asset managers sitting on vast pools of institutional capital.
The result has been a systematic migration of corporate lending from bank balance sheets to private funds. By the end of 2025, private credit had surpassed the $1.4 trillion syndicated leveraged loan market in the United States as the dominant source of financing for private equity-backed transactions, according to data from LCD, a PitchBook company. UK mid-market firms, particularly those backed by private equity, have increasingly turned to direct lenders as traditional clearing banks have tightened their credit underwriting.
Interest rates have amplified the opportunity. With benchmark rates elevated relative to the zero-bound era of 2010–2021, floating-rate private credit instruments now generate gross yields in the 11–14% range for upper-middle-market transactions, according to fund-level data published by Ares Management in its Q4 2025 investor letter. After management fees and defaults, net returns to limited partners have averaged 9.2% annually over the five years ending December 2025 — competitive with or exceeding public high-yield and equity alternatives on a risk-adjusted basis for many institutional allocators, including UK pension schemes and insurance companies seeking to match long-duration liabilities.
The Structural Players and Their Scale
The market is dominated by a small number of very large players. Apollo Global Management reported $562 billion in total credit AUM as of March 2026, with approximately $280 billion attributable to corporate direct lending. Blackstone Credit and Insurance manages roughly $345 billion. Ares Management, which pioneered the direct lending strategy in the early 2000s, operates $312 billion in credit strategies globally.
Below the top tier, a proliferating ecosystem of mid-market managers — firms like Blue Owl Capital, HPS Investment Partners, and Golub Capital — competes for transactions in the £40 million to £400 million loan size range. This segment has seen the fastest growth, with new fund launches up 38% year-over-year in 2025, according to Preqin. UK-domiciled funds and managers regulated by the Financial Conduct Authority represent a growing proportion of European private credit activity, with London cementing its position as the European hub for fund structuring and deal origination.
The investor base has also broadened dramatically. What was once primarily the domain of pension funds and sovereign wealth vehicles has expanded to include insurance companies, family offices, and increasingly, retail-adjacent products that allow high-net-worth individuals to access the asset class. UK defined benefit pension schemes, many in surplus following the liability-driven investment crisis of 2022, have been reallocating capital to private credit as they de-risk equity portfolios.
Regulators Are Taking Notice
The scale of private credit has brought it squarely within the sights of regulators on both sides of the Atlantic — and in the City of London in particular. In January 2026, the Financial Stability Board published a 74-page assessment identifying private credit as a potential vector for systemic risk, citing concerns about leverage at both the fund and borrower level, limited mark-to-market transparency, and concentration of risk in mid-market borrowers with limited credit history.
The FSB stopped short of recommending mandatory stress testing for private credit funds, but flagged it as a likely policy direction. In the UK, the Financial Conduct Authority has been monitoring private credit growth closely. The FCA’s latest Wholesale Markets Review touched on fund liquidity risk in private markets, and the Bank of England’s Financial Policy Committee raised private credit as a growing area of macro-prudential concern in its December 2025 Financial Stability Report.
The European Securities and Markets Authority has separately proposed a framework requiring private credit funds operating in EU jurisdictions to report quarterly leverage ratios and counterparty concentration data to national regulators, with implementation targeted for Q4 2026. UK-based managers accessing EU markets via national private placement regimes will need to monitor whether the FCA adopts equivalent measures under its post-Brexit regulatory framework.
In the United States, the SEC has finalised rules requiring enhanced disclosure for private fund advisers with over $1.5 billion in AUM — a threshold that captures most significant players. The industry has responded with measured compliance whilst lobbying vigorously against more stringent bank-like capital requirements.
What Comes Next
The critical question for private credit’s continued trajectory is credit quality. The market has grown predominantly during an era of private equity expansion, when strong deal flow and financial engineering kept default rates artificially low. The trailing 12-month default rate for private credit loans stood at 2.8% as of March 2026, compared to 4.1% for broadly syndicated leveraged loans, according to Moody’s Ratings. Critics argue this spread reflects private credit’s flexibility to renegotiate or extend distressed loans rather than call defaults — a dynamic that may mask underlying credit deterioration.
The next genuine credit cycle will test whether private credit’s risk management practices match its marketing. For UK mid-market companies, which have borrowed heavily on floating rates, any sustained period of elevated base rates represents a meaningful refinancing risk when existing facilities mature. The Bank of England’s rate trajectory will matter significantly for the credit performance of UK-domiciled private credit portfolios.
For now, however, the capital keeps coming, the yields remain compelling, and the market that barely existed fifteen years ago now underwrites the debt of companies employing millions of people across the UK and the broader developed world.
The shadow banking boom has left the shadows. Whether regulators — in London, Brussels, and Washington — can keep pace with what they find in the light is a different question entirely.
Sources: Preqin Global Private Debt Report (2026), Alternative Credit Council AUM survey, Ares Management Q4 2025 investor letter, Financial Stability Board assessment (January 2026), Moody’s Ratings leveraged finance data, Bank of England Financial Stability Report (December 2025), Financial Conduct Authority Wholesale Markets Review.
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