Private Equity Debt: Top Firms in 2026

Key Facts

• The global private equity industry manages approximately $8-9 trillion in assets under management as of 2024, quadrupling since 2012.
• Private credit funds, the primary non-bank suppliers of buyout debt, hold $1.6-1.8 trillion in AUM globally, growing at 20% annually for five years through 2023.
• A standard leveraged buyout (LBO) finances roughly 30% of the purchase price with investor equity and 70% with borrowed capital, placed directly on the acquired company's balance sheet.
• Net asset value (NAV) lending, a fund-level borrowing mechanism, reached approximately $100 billion in 2023 and is projected to reach $700 billion by 2030.
• PE-backed companies defaulted at a 17% rate (including loan renegotiations) between January 2022 and August 2024, double the rate for non-sponsored companies, per Moody's.
• Dividend recapitalizations surpassed $30 billion in 2024 year-to-date, near equivalent to the full-year total during the 2021 boom.
• The top 10 PE fund managers account for more than 22% of global PE fundraising, and the top 10 private credit firms control approximately one-third of all private credit AUM.

Understanding PE Debt: LBOs, Private Credit, and the Capital Stack

Private equity debt encompasses the debt instruments that fund buyouts, support portfolio companies, and provide liquidity to PE funds and their investors. The core mechanic is leverage: a PE firm acquires a target company using roughly 30% investor equity and 70% borrowed capital. That debt sits on the acquired company's balance sheet, not the fund's.

The global PE industry manages $8-9 trillion in assets, with debt woven through every structural layer. Individual portfolio companies carry acquisition financing as senior secured term loans, unitranche facilities, or mezzanine debt. At the fund level, GPs (general partners) now borrow through NAV loans secured against portfolio company valuations. GP stakes funds sit above both layers, acquiring management companies and borrowing against management fee income as collateral. New York dominates as the primary US hub for mega-fund buyout and credit activity. London serves as the European center and Hong Kong anchors Asia-Pacific deal flow.

Private credit emerged as the dominant supplier of acquisition debt, reaching $1.6-1.8 trillion in AUM. Traditional bank lending retreated following post-2008 regulations, and the 2023 Silicon Valley Bank collapse accelerated the shift. Direct lending now accounts for approximately 44% of all private debt AUM. Blackstone Credit, Apollo Credit, KKR Credit, Ares Management, Blue Owl Capital, HPS Investment Partners, Golub Capital, and Owl Rock compete with banks to finance PE-sponsored acquisitions. More than two-thirds of private credit loans go to PE-backed companies.

PE Firms Operating Across the Debt-Equity Spectrum: Firm Comparison

The firms below operate across the full capital structure, providing equity and private credit to buyout transactions. Most firms did not publicly disclose individual AUM figures, so this table omits the AUM column. Firms appear alphabetically.

Blackstone, Apollo, and KKR each run credit divisions that actively compete with their equity arms for access to the same portfolio companies. This dual role creates competitive advantages, including proprietary deal information, alongside genuine conflicts of interest for limited partners (LPs) whose capital sits in both vehicles simultaneously.

Top Picks by Investment Strategy

Largest Platform: Blackstone spans buyout, private credit, real estate, and infrastructure. Its Hilton Hotels buyout and IPO exit between 2013 and 2018 produced one of the most cited PE returns in industry history.

Full Capital Stack Leader: Apollo Global Management participated alongside Blackstone in the $5.5 billion Cotiviti private debt syndicate in 2023, the largest private debt transaction recorded at that point. Apollo simultaneously pursued equity buyouts in adjacent sectors.

Technology Buyout Specialist: Thoma Bravo closed a $10.6 billion acquisition of Boeing's Jeppesen navigation unit in 2025, demonstrating scale typically associated with mega-funds while maintaining its focus on enterprise software.

Strongest Middle-Market Credit Presence: Ares Management built its platform across senior secured loans, unitranche facilities, mezzanine debt, and distressed debt. It serves as a full-spectrum acquisition financing source for middle-market borrowers.

Most Active in Secondaries: Ardian leads the secondary fund market globally, providing LP liquidity through discounted fund stake purchases. PE exit volumes fell approximately 73% from their 2021 US peak on an annualized basis through 2023, making that liquidity function increasingly critical.

Healthcare and Government Sector Depth: Carlyle Group's Cotiviti buyout required assembling the largest private credit club deal in history, validating its capacity for complex institutional transactions where sector expertise matters as much as financial engineering.

Technology Take-Private Execution: Hellman & Friedman, partnering with Permira, secured a $5 billion private lending facility from Blackstone for the Zendesk take-private in 2022. The deal shows how competing equity sponsors and credit arms cooperate on large transactions.

Middle-Market Operational Buyout: Golden Gate Capital targets founder-owned and operationally complex businesses across consumer, technology, and financial services. Its deal structures became closely studied case studies in PE debt extraction and long-term company stability.

Firm Profiles: Private Credit and Buyout Leaders

Blackstone: The Mega-Fund Platform

Blackstone operates across more of the acquisition debt ecosystem than any other single firm, with separate divisions for buyout equity, private credit, real estate, and infrastructure. Its credit business competes directly with banks for acquisition financing while its equity division targets the same deal types. That dual vantage point is unavailable to standalone PE or credit managers. Blackstone provided the $5 billion private lending facility supporting the Zendesk take-private in 2022, generating revenue from a transaction where another equity sponsor held the ownership stake. Blackstone (NYSE: BX) is the most publicly transparent alternatives platform spanning all four major asset classes simultaneously.

Apollo Global Management: The Credit-Equity Convergence Play

Apollo's defining characteristic is its deliberate positioning as both equity sponsor and lender in the same deals. Its credit arm joined Blackstone's in financing the record $5.5 billion Cotiviti loan in 2023, while Apollo's equity division simultaneously pursued buyout opportunities in overlapping sectors. This dual role provides earlier access to borrower financials and management teams than standalone lenders typically obtain. Apollo trades on NYSE (ticker: APO), offering public market transparency into its fund economics.

KKR: The Pioneer Adapting Its Original Model

KKR invented the modern leveraged buyout with its 1989 RJR Nabisco acquisition. That transaction established the template still governing how PE-backed acquisition debt operates: investor equity paired with bank or private credit debt, repaid from portfolio company cash flows over a four-to-seven-year hold. KKR Credit now lends to other PE firms' portfolio companies, adding market intelligence that pure equity investors lack. Its 2025 acquisition of Swedish healthcare assets signals continued international deal activity despite subdued global buyout volumes. KKR's publicly traded structure (NYSE: KKR) provides more fund economic transparency than most private alternatives managers, making it a useful benchmark for evaluating how mega-fund economics translate into investor returns.

Carlyle Group: The Sector-Specialist Acquirer

Carlyle's edge lies in sector concentration rather than breadth. Government technology, defense, aerospace, and healthcare have historically generated proprietary deal flow that more broadly focused mega-funds are less equipped to source. As equity sponsor on the Cotiviti healthcare technology buyout in 2023, Carlyle assembled the largest private debt financing in history alongside Apollo and Blackstone. That transaction validated the return of the "club deal" structure, a format that had become politically sensitive a decade earlier following global financial crisis collusion investigations. Carlyle (NASDAQ: CG) is headquartered in Washington, D.C., maintaining institutional proximity to government-adjacent industries that structurally differentiates its pipeline from New York-centric competitors.

Ares Management: The Credit Supermarket

Ares built its identity around credit rather than equity, making it the clearest representative of the alternative credit category within the broader PE ecosystem. Its platform spans senior secured loans, unitranche facilities, mezzanine debt, and distressed debt. Borrowers can access every layer of the acquisition financing capital stack through a single relationship. Ares and CPP Investments' 2012 LBO of 99 Cents Only Stores for $1.6 billion loaded $675 million in debt onto the retailer. The company's 2024 bankruptcy illustrated how high leverage ratios from a buyout can outlast the PE firm's ownership period by more than a decade. Debt-to-EBITDA multiples at entry remain the most consequential metric in evaluating LBO risk.

Ardian: The Secondaries Specialist

Ardian occupies a structural niche that the prolonged exit logjam of 2022-2025 made more valuable than at any point in its history. Based in Paris with global operations, it purchases existing PE fund stakes from LPs seeking liquidity before underlying portfolio companies exit, typically at a discount to net asset value. Secondaries transactions provide LP sellers with immediate capital and give Ardian buyers exposure to a diversified portfolio of late-stage investments at below-stated valuations. PE exit value declined approximately 73% in the US from its 2021 peak on an annualized 2023 basis. As demand for secondary liquidity grew sharply, Ardian's dual role as both secondaries buyer and primary PE investor gave it broader market exposure than any single-strategy alternatives manager.

Thoma Bravo: The Software Consolidator

Thoma Bravo's $10.6 billion acquisition of Boeing's Jeppesen navigation unit in 2025 placed it firmly in mega-fund transaction territory while retaining its technology-sector identity. Software buyouts carry a distinct leverage profile from industrial or consumer LBOs: high recurring revenue margins support debt service well, but rich entry multiples can compress the debt-to-EBITDA ratios that lenders will accept. Thoma Bravo's Miami headquarters reflects the geographic broadening of PE management beyond the New York-Boston-San Francisco corridor. Its platform consolidation strategy, buying multiple software companies and merging them into integrated enterprise platforms, is the category model for technology-focused buyout firms. No single-sector PE manager generated more consistent deal flow in the 2020s.

Golden Gate Capital: The Cautionary Case Study

Golden Gate Capital's ownership of Red Lobster from 2014 to 2020 is one of the most analyzed examples of PE debt mechanics in recent industry history. The firm executed a $1.5 billion sale-leaseback of Red Lobster's real estate assets, raising $761.97 million during its ownership period and converting owned property into a permanent long-term lease obligation. After exiting in 2020, Golden Gate avoided direct exposure to Red Lobster's Chapter 11 bankruptcy in May 2024. The case is instructive for analysts evaluating sale-leaseback structures as a form of PE debt substitute. The long-term rent obligation created by the transaction carried the same financial burden as balance-sheet debt, without the contractual protections a lender would typically require.

Key Trends in PE Acquisition Finance

Private Credit Displacing Bank Lending

Private credit captured approximately 67% of buyout transaction financing in the first half of 2023, up from 41% in 2021. Post-2008 banking regulations made traditional lenders more risk-averse toward leveraged transactions. The 2023 SVB collapse accelerated corporate borrowers' migration toward direct lending. Private credit fund managers have also expanded beyond sponsored loans into asset-backed finance and non-sponsor credit. Non-sponsor lending bypasses PE firms entirely, negotiating directly with corporate borrowers. It carries more restrictive covenants and historically lower loss rates than sponsor-led buyout debt.

Rising Rates Reshaped Buyout Debt Economics

The Federal Reserve raised its benchmark rate from near zero to 5.25-5.5% through 2022-2023. That increase raised buyout debt costs by approximately 380 basis points above their 20-year average. European PE debt costs doubled from roughly 4% in January 2022 to approximately 8% by 2023. The average PE-owned company's interest coverage ratio fell from 3 times EBITDA in 2021 to 2 times by 2023 per JPMorgan, leaving thin margin against revenue shortfalls. Equity contributions to buyout deals rose from a 10-year average of 46% to roughly 56% of deal value by the third quarter of 2023. Higher debt costs compressed lender appetite for leverage at every tier.

NAV Loans and Fund-Level Leverage

As PE exit value declined sharply from its 2021 peak, GPs turned to NAV lending to generate LP distributions without requiring asset sales. NAV loans borrow against the aggregate net asset value of a fund's portfolio, creating leverage on leverage: individual portfolio companies already carry acquisition debt, and the fund layer adds a second debt tier secured by those same assets. The NAV lending market is projected to grow from $100 billion in 2023 to $700 billion by 2030. LPs should review their limited partnership agreements for consent rights around NAV debt. Many existing agreements give fund managers broad unilateral authority to take on fund-level borrowing without LP approval.

PIK Loans and Covenant-Lite Proliferation

More than 80% of buyout loans carried no restrictive covenants by the late 2010s. Payment-in-kind (PIK) loans allow borrowers to defer cash interest by issuing additional debt notes. Under the high-rate environment, PIK use grew sharply: nearly 10% of net income reported by US business development companies (BDCs) now comes from PIK payments, per S&P Global. PIK structures postpone defaults but worsen creditor recoveries. Defaulted buyout loan recoveries averaged approximately 48% of par value in 2022-2023, versus 55% for conventional bank loans per IMF data.

Creditor-on-Creditor Violence and Structural Opacity

PE fund managers operating both equity and credit divisions can move portfolio company assets beyond the reach of secured lenders, or enlist minority lender coalitions to block the voting thresholds required to declare defaults. This dynamic is a structural consequence of allowing the same organization to act as equity owner, senior lender, and mezzanine lender in the same transaction. The Bank of England's financial stability team warned in April 2024 that "leverage on leverage" risks across the PE ecosystem were difficult to quantify. No single regulator could see total borrowing across a PE firm, its funds, and all portfolio companies simultaneously.

How to Evaluate PE Acquisition Finance Providers

Track record measurement should begin with the public market equivalent (PME), not only the internal rate of return (IRR). IRR can be inflated by subscription credit lines, which delay LP capital calls and make early distributions appear larger than they are. Managers should provide returns both with and without subscription facilities and NAV debt adjustments.

Leverage discipline separates operational value creators from financial engineers. A fund entering deals at 12 times EBITDA at the 2021 peak carries a different risk profile than a middle-market fund entering at 8-9 times with equity contributions above 50%. Requesting vintage-year performance data broken out by leverage ratios at entry is the most direct way to distinguish the two approaches.

Fee structures require scrutiny beyond the standard 2% management fee and 20% carried interest model. PE managers also charge monitoring fees to portfolio companies, arrangement fees as lenders, and director fees as board members. LPs should request a complete schedule of all fees extracted from holdings, not just fees paid directly to the manager.

For PE-backed companies evaluating private credit providers, covenant structure is the central decision. Covenant-lite loans provide operating flexibility but remove early warning signals when financial performance weakens. Unitranche facilities combine senior and subordinated debt into a single instrument with a blended rate. They have become the dominant structure in middle-market PE transactions because of their execution speed and structural simplicity.

Which Firm Fits Your Needs?

LPs building alternatives allocations that span PE equity and private credit should evaluate Blackstone, Apollo, and KKR as integrated platforms. Each runs credit divisions that actively compete with their own equity businesses. These fund managers offer the broadest product coverage but also carry the most acute conflicts of interest. Carlyle offers a more sector-concentrated alternative with publicly traded transparency and government-sector sourcing advantages that the New York-centric mega-funds lack.

Founders and business owners considering a PE acquisition should understand that middle-market buyout investors like Golden Gate Capital negotiate directly with sellers. They typically bypass the auction dynamics that drive up prices and leverage at the mega-fund tier. Middle-market deals generally enter at lower EBITDA multiples, leaving more headroom for debt service if operating performance falls short of projections. Evaluating whether a prospective PE buyer plans to use sale-leaseback structures or dividend recapitalizations is essential diligence. Both create long-term financial obligations that survive beyond the PE firm's ownership period.

LPs seeking pure private credit exposure without equity risk should evaluate Ares Management's credit platform alongside non-sponsor direct lenders including Blue Owl Capital, HPS Investment Partners, Golub Capital, and Owl Rock. Non-sponsor credit sources deals independently rather than following PE sponsor mandates. It tends to carry more restrictive covenants and lower historical loss rates than sponsor-led buyout debt, making it a structurally sounder option for risk-conscious credit allocators during periods of elevated PE-backed default rates.

Methodology

Firms and data in this article were selected based on research into acquisition debt structures, leveraged buyout mechanics, and private credit markets drawing from alternatives data, fund performance databases, and industry reports covering 2022-2024. Market statistics reflect reported figures from the periods cited: industry AUM ($8-9 trillion), private credit AUM ($1.6-1.8 trillion), NAV lending volumes ($100 billion), default rates (17% for PE-backed companies per Moody's), dividend recapitalization volumes (more than $30 billion per PE industry data), and LBO valuation multiples (median 12 times EBITDA at 2022-2023 peak per Morgan Stanley). This guide to private equity debt covers the structural relationship between equity and debt across the PE model as of early 2026. Firm profiles use only confirmed data. Where specific AUM figures were not publicly disclosed, firms are described by strategy and confirmed notable transactions rather than estimated numbers.