Private Debt Explained: 2026 Guide to Direct Lending, Mezzanine, and Distressed Debt
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Private Debt Explained: 2026 Guide to Direct Lending, Mezzanine, and Distressed Debt

Private Debt Explained: How Direct Lending, Mezzanine, and Distressed Debt Work

Private Debt Explained: How Direct Lending, Mezzanine, and Distressed Debt Work
Private Debt Explained: 2026 Guide to Direct Lending, Mezzanine, and Distressed Debt

By CT Acquisitions Editorial Team, reviewed by senior M&A advisors. Last reviewed: June 2026.

Private debt is capital lent to companies outside public bond markets and traditional bank syndicates, held on the balance sheets of asset managers, business development companies (BDCs), private funds, and insurance-linked vehicles. It is the umbrella category that includes direct lending, mezzanine, unitranche, second-lien, payment-in-kind (PIK) notes, distressed debt, special situations, and venture debt. Private credit is the largest subset of private debt, usually referring to performing loans to non-investment-grade companies, most often owned by private equity sponsors. As of the most recent Preqin data (Q1 2026), global private debt assets under management sit at approximately $2.1 trillion, up from $1.5 trillion at the end of 2023, with direct lending accounting for the largest single strategy share.

What is private debt in one sentence?

Private debt is any negotiated, non-traded loan or debt security originated by non-bank lenders such as asset managers, BDCs, and private funds, held to maturity or resold in a small syndicate rather than distributed through public bond markets. The borrower is usually a middle-market or lower-middle-market company, often owned by a private equity firm, and the loan sits outside the syndicated leveraged loan market covered by S&P Global Ratings and the Loan Syndications and Trading Association.

According to the International Monetary Fund’s April 2024 Global Financial Stability Report, private credit alone exceeded $2.1 trillion in committed capital globally by year-end 2023, and Preqin’s 2026 forecast projects the broader private debt asset class will reach $2.8 trillion by 2028. The Bank for International Settlements has flagged private debt as one of the fastest-growing segments of non-bank financial intermediation.

Private debt vs private credit: are they the same thing?

No. Private credit is a subset of private debt. Private debt is the wider bucket that includes performing loans (private credit), stressed and distressed debt, mezzanine, PIK notes, venture debt, and specialty finance. When Blackstone, Ares Management, or Blue Owl Capital talk about their “private credit” businesses, they usually mean performing direct lending to sponsor-backed borrowers. When Oaktree Capital Management or Fortress Investment Group talk about their “private debt” businesses, they typically include distressed, special situations, and rescue financing alongside performing loans.

Preqin, the primary industry data provider, uses “private debt” as the top-level asset class and lists direct lending, mezzanine, distressed debt, special situations, and venture debt as the five underlying strategies. Bain & Company’s Global Private Equity Report 2024 uses the same taxonomy. The Alternative Credit Council, the private credit trade body affiliated with the Alternative Investment Management Association, treats the terms as effectively interchangeable in practitioner shorthand, but the technical distinction still matters for reporting.

How big is the private debt market in 2026?

Global private debt assets under management reached approximately $2.1 trillion in Q1 2026 according to Preqin, up from $1.5 trillion at year-end 2023 and roughly $875 billion at year-end 2020. The Bank of England’s Financial Policy Committee cited $1.8 trillion in its December 2024 Financial Stability Report. Bain & Company projects $2.6 trillion to $2.8 trillion by 2028 in its 2025 midyear update.

Direct lending is the largest strategy inside that number, accounting for roughly 45% of private debt AUM. Distressed debt and special situations together account for another 20%. Mezzanine, PIK, venture debt, and specialty finance make up the remainder. The United States accounts for approximately 65% of global private debt AUM, Europe roughly 25%, and Asia-Pacific plus rest-of-world the remaining 10%.

Why has private debt grown so fast since 2020?

Three structural shifts drove the growth. First, US bank consolidation and post-2008 regulatory tightening (Basel III, Dodd-Frank, the OCC’s 2013 Leveraged Lending Guidance) pushed banks out of middle-market leveraged lending. Second, private equity dry powder reached $2.62 trillion by mid-2024 per Bain, and PE sponsors needed non-bank financing partners who could underwrite quickly and hold loans to maturity. Third, insurance companies and pension funds moved allocation targets from public high-yield bonds (where spreads had compressed) into private debt (where floating-rate senior secured loans offered 500 to 700 basis points over the Secured Overnight Financing Rate).

The 2023 regional banking crisis, triggered by the failures of Silicon Valley Bank, Signature Bank, and First Republic, accelerated the trend. Middle-market borrowers that had relied on regional bank revolvers moved toward direct lenders. Federal Reserve H.8 data showed commercial and industrial loans at US commercial banks contracted in 2023 while private credit AUM grew by an estimated 25% that year according to Preqin.

The core private debt strategies

Private debt is not one product. It is a spectrum of loan structures that trade off seniority, security, yield, and risk. Every private debt fund pursues a specific strategy or mix of strategies. Understanding which strategy a fund runs tells you what kind of return, risk, and payment structure to expect.

Direct lending

Direct lending is the largest and most straightforward private debt strategy. A direct lender originates a senior secured loan directly to a borrower, holds it on the fund balance sheet, and collects interest until maturity or refinancing. The loans are typically floating rate, priced at SOFR plus 500 to 700 basis points, with maturities of five to seven years, secured by all assets of the borrower on a first-lien basis.

Borrowers are usually middle-market companies with EBITDA between $10 million and $150 million, most often owned by private equity sponsors. Loans finance leveraged buyouts, dividend recapitalizations, acquisitions, and refinancings. The largest direct lenders by 2026 AUM include Blackstone Credit & Insurance (approximately $354 billion), Ares Management ($335 billion in credit AUM), Blue Owl Capital ($174 billion in credit), Golub Capital, Antares Capital, and Owl Rock (now part of Blue Owl). Direct lending returns to investors have averaged 9% to 12% net internal rate of return over the 2015 to 2023 vintages according to Preqin performance data.

Mezzanine debt

Mezzanine debt sits below senior loans and above equity in the capital structure. It is unsecured or subordinated secured debt, usually with a fixed coupon of 10% to 14%, plus equity warrants or PIK interest that push total returns into the 14% to 18% range. Mezzanine finances the gap between senior debt and equity in leveraged buyouts, growth capital transactions, and shareholder recapitalizations.

Because mezzanine sits behind senior lenders in bankruptcy, recovery in default is materially lower than senior secured loans. Standard & Poor’s ultimate recovery data shows mezzanine average recoveries of 20% to 40% versus 60% to 75% for first-lien senior loans. Named mezzanine providers include Audax Private Debt, GoldenTree Asset Management, HPS Investment Partners (formerly Highbridge), Crescent Capital, and Twin Brook Capital Partners. Mezzanine issuance has shrunk as a share of private debt over the last decade because unitranche loans (see below) collapse senior and subordinated tranches into a single instrument.

Unitranche

Unitranche is a single-tranche loan that combines what would otherwise be a senior secured loan and a mezzanine or second-lien loan into one instrument at a blended coupon. The lender (or a small club of lenders) provides the entire debt package, then privately allocates first-out and last-out economic pieces through an agreement among lenders (AAL). The borrower sees one loan, one covenant package, and one lender group.

Unitranche loans typically price at SOFR plus 550 to 750 basis points and are the dominant leveraged finance product for middle-market sponsor deals below $500 million in total debt. Antares Capital, Ares Management, Blackstone Credit, Golub Capital, and Owl Rock are the largest unitranche originators. According to Refinitiv LPC data, unitranche accounted for over 65% of middle-market sponsored LBO financings in 2024 and 2025.

Second-lien loans

Second-lien loans are secured loans that rank behind first-lien senior loans in the priority of security interest but ahead of unsecured debt. They typically price at SOFR plus 750 to 1,000 basis points with maturities one to two years longer than the first-lien loan. Second-lien is used in larger middle-market and upper-middle-market LBOs where the sponsor wants more leverage than a single senior tranche can support.

The distinction between second-lien and mezzanine matters in bankruptcy. Second-lien has a security interest that gives it a claim on collateral proceeds after first-lien is paid in full. Mezzanine is typically unsecured or holds a stock pledge rather than an asset lien, which gives it worse recovery outcomes. S&P’s leveraged loan default database shows second-lien recovery rates averaging 45% to 55%.

Payment-in-kind (PIK) notes

PIK notes accrue interest as additional principal rather than requiring current cash coupon payments. A 12% PIK note on a $100 million principal balance adds $12 million to principal at the end of year one, compounding forward. PIK is used when the borrower cannot support current cash interest, most often in growth-stage companies, distressed situations, or holdco financings.

PIK loans price at fixed rates of 10% to 15%, with maturities of five to seven years, and are usually structurally subordinated to operating company debt. PIK activity surged in 2023 and 2024 as higher SOFR rates pressured borrower cash flow coverage ratios. The IMF’s April 2024 GFSR warned that rising PIK share in BDC portfolios could mask underlying credit deterioration because interest income continues to accrue on paper even when the borrower cannot pay cash.

Distressed debt

Distressed debt is debt of companies that are in financial distress, default, or bankruptcy. Distressed strategies buy loans, bonds, and trade claims at discounts to face value, often 40 to 70 cents on the dollar, then either restructure the company (loan-to-own) or wait for recovery. Returns come from principal recovery, restructuring gains, and equity received in exchange for debt.

Named distressed managers include Oaktree Capital Management, Apollo Global Management, Cerberus Capital Management, Elliott Investment Management, Silver Point Capital, and Sixth Street Partners. Distressed debt returns are highly episodic. Vintages that deploy capital during credit dislocations (2001-2002, 2008-2010, 2020, 2022-2023) have historically produced 15% to 25% net IRRs, while vintages that deploy in benign credit environments produce single-digit returns. For borrowers in distress, understanding Chapter 11 reorganization mechanics matters because distressed lenders frequently use bankruptcy as a tool to convert debt to equity.

Special situations

Special situations funds pursue idiosyncratic credit opportunities that do not fit standard direct lending or distressed strategies. Examples include rescue financing for over-levered companies, structured equity, litigation finance, receivables financing, aviation and equipment leasing, and non-performing loan portfolios purchased from banks. Returns target 12% to 20% net IRR with return profiles that depend heavily on the specific investment.

Sixth Street Partners, King Street Capital Management, Fortress Investment Group, and Centerbridge Partners are named special situations investors. Special situations blurs into distressed on one side and into private equity on the other, and fund documents typically give the manager wide discretion to pursue whatever credit opportunity offers the best risk-adjusted return.

Venture debt

Venture debt is senior secured or subordinated debt lent to venture-backed technology and life sciences companies, typically alongside an equity round. Interest rates run SOFR plus 500 to 900 basis points, with warrants that give the lender 0.5% to 3% equity upside. Maturities are shorter (three to four years), and covenants focus on minimum cash balance rather than EBITDA multiples.

Silicon Valley Bank was the dominant venture debt lender until its March 2023 failure. First Citizens BancShares acquired the SVB loan book, and the venture debt market fragmented. Named venture debt providers now include Hercules Capital, Trinity Capital, Runway Growth Finance, Horizon Technology Finance, and TriplePoint Capital. Venture debt AUM is a small share of total private debt, around $60 billion globally per PitchBook data.

Sponsor vs non-sponsor lending

Sponsor lending means the borrower is owned by a private equity sponsor (Blackstone, KKR, Bain Capital, TPG, Apollo, etc.). Non-sponsor lending means the borrower is owned by a family, management team, or founders with no PE ownership. The two markets have different economics, different diligence processes, and different lender ecosystems, and understanding the distinction is essential for anyone financing or refinancing a middle-market business.

Why sponsor-backed deals dominate

Roughly 70% to 80% of US direct lending volume is sponsor-backed according to Refinitiv LPC and Preqin data. Sponsors are repeat borrowers with dedicated capital markets teams, standardized documentation, and predictable exit horizons that make underwriting faster and more consistent. Sponsors also inject equity checks that create equity cushion beneath the debt, giving lenders a defined loss-absorption layer.

Direct lenders typically underwrite sponsor deals at 4.5x to 6.5x debt-to-EBITDA leverage, with equity contributions of 40% to 55% of the total capital structure. The sponsor’s investment thesis, historical returns, and portfolio track record become part of the credit analysis. Lenders like Antares, Ares, Blackstone Credit, and Golub have relationship coverage teams dedicated to specific sponsor accounts.

Non-sponsor lending and how it works

Non-sponsor lending covers loans to founder-owned, family-owned, and management-owned businesses. Common transactions include acquisition financing, dividend recapitalizations, ESOP financings, and growth capital. Documentation takes longer because the borrower does not have an in-house capital markets team, and diligence is deeper because the credit story is more idiosyncratic.

Non-sponsor loans typically price 50 to 150 basis points wider than comparable sponsor loans because the perceived execution and information risk is higher. Lenders that specialize in non-sponsor middle-market include NXT Capital, Monroe Capital, Twin Brook Capital, and Churchill Asset Management. For a business owner considering a sale or recapitalization, the choice between working with a sponsor buyer or arranging non-sponsor debt financing is a strategic one that a sell-side advisor can help evaluate.

Comparison of the major private debt strategies

The table below summarizes the core differences across the six most common private debt strategies. Coupon and return figures are 2026 market rates for middle-market sponsor deals; non-sponsor and larger transactions may price differently.

Strategy Position in cap stack Typical coupon Target net IRR Typical maturity Recovery in default
Direct lending (senior secured) First-lien senior SOFR + 500-700 bps 9-12% 5-7 years 60-75%
Unitranche Blended first-lien SOFR + 550-750 bps 10-13% 5-7 years 55-70%
Second-lien Second-lien secured SOFR + 750-1000 bps 11-14% 6-8 years 45-55%
Mezzanine Subordinated (unsecured or stock pledge) 10-14% fixed + PIK/warrants 14-18% 7-10 years 20-40%
PIK notes Subordinated or holdco 10-15% fixed PIK 13-17% 5-7 years 15-35%
Distressed debt Varies (buying at discount) Purchased below par 15-25% (vintage-dependent) Situation-driven Varies widely

The largest US private debt managers in 2026

Private debt is a concentrated business. The ten largest managers control an outsized share of AUM, deal flow, and BDC market capitalization. The table below reflects reported credit AUM as of Q1 2026 earnings disclosures and each firm’s most recent 10-K, 10-Q, and annual reports.

Manager Credit AUM (approx.) Primary strategy focus Flagship BDC or vehicle
Blackstone $354B Direct lending, opportunistic credit Blackstone Private Credit Fund (BCRED)
Ares Management $335B Direct lending, alternative credit Ares Capital Corporation (ARCC)
Apollo Global Management $598B (total credit) Direct origination, high-grade, hybrid MidCap Financial, Apollo Debt Solutions BDC
Blue Owl Capital $174B Direct lending, tech-focused credit OBDC (formerly Owl Rock)
HPS Investment Partners $149B (pre-BlackRock deal) Senior direct lending, mezzanine HPS Corporate Lending Fund
Golub Capital $70B+ Middle-market sponsor unitranche Golub Capital BDC (GBDC)
Oaktree Capital Management $205B (subsidiary of Brookfield) Distressed, special situations Oaktree Specialty Lending (OCSL)
Antares Capital $85B Middle-market sponsor unitranche Various institutional funds
Sixth Street Partners $110B Special situations, direct lending Sixth Street Specialty Lending (TSLX)
KKR Credit $260B (across strategies) Direct lending, structured credit FS KKR Capital Corp (FSK)

The list has consolidated meaningfully. BlackRock acquired HPS Investment Partners in a deal announced December 2024 that closed in 2025, adding $148 billion in credit AUM. Owl Rock and Dyal Capital Partners merged to form Blue Owl in 2021. Ares acquired GCP Capital Partners’ international real estate credit business in 2024. Brookfield acquired Oaktree in 2019. The direction of travel is toward a smaller number of scale managers with $100 billion-plus credit platforms.

How a direct lending deal actually gets structured

A middle-market sponsor-backed direct lending transaction moves from initial term sheet to funded loan in eight to twelve weeks. Understanding the sequence matters for borrowers, sponsors, and lenders because each stage has commercial and legal decision points that shape the final loan.

  1. Sponsor sends deal to lenders. The private equity sponsor’s capital markets team sends a lender presentation covering the target company, historical financials, projected financials, and requested debt structure. Between three and eight direct lenders receive the package.
  2. Indicative term sheets. Lenders return non-binding term sheets within one to two weeks. Terms cover leverage (turns of EBITDA), pricing (SOFR spread and floor), fees (upfront original issue discount, commitment fee, unused fee), tenor, amortization, prepayment protection, and preliminary covenants.
  3. Sponsor selects lead lender. The sponsor picks a lead lender (or club of two to four lenders) based on pricing, terms, execution certainty, and relationship. The lead lender issues a signed commitment letter alongside the sponsor’s binding offer to the seller.
  4. Confirmatory due diligence. Lender diligence runs in parallel with sponsor diligence. Third-party providers deliver quality of earnings (QoE) reports, commercial due diligence, legal diligence, environmental reports, and IT diligence. Lenders also complete their own credit analysis.
  5. Documentation drafting. Lender counsel drafts the credit agreement, security documents, and intercreditor agreements. Sponsor counsel and borrower counsel negotiate the terms. Key negotiated items include EBITDA definition (add-backs), most-favored-nation clauses, incremental facility capacity, restricted payment capacity, and permitted investments.
  6. Rating agency process (for larger deals). Deals above $300 million to $500 million in total debt often obtain a private rating from S&P Global, Moody’s, or KBRA, particularly if the lender expects to distribute pieces of the loan to CLO investors.
  7. Signing and funding. The credit agreement signs simultaneously with the equity purchase agreement or a few days before. Funding occurs at closing when the sponsor pays the seller.
  8. Post-closing. The borrower delivers quarterly financial statements, monthly management reports for larger deals, annual audited financials, and covenant compliance certificates. The lender monitors performance and may amend, waive, or accelerate as circumstances warrant.

Understanding how leveraged buyout models are built helps borrowers and sponsors anticipate lender expectations for debt service coverage, fixed charge coverage, and leverage covenants.

Covenants and default triggers

Private debt loans are governed by financial covenants and negative covenants that constrain borrower behavior and give the lender early warning signals. The covenant package is one of the most heavily negotiated parts of the credit agreement.

Financial covenants

The most common financial covenant in middle-market direct lending is a maximum total leverage ratio (total debt divided by EBITDA), tested quarterly, that steps down over the life of the loan. A typical structure sets an opening covenant of 7.0x with quarterly step-downs to 6.0x by year four. Fixed charge coverage ratio (EBITDA less capex, divided by cash interest plus scheduled principal amortization plus taxes) is a common secondary covenant, typically set at a minimum of 1.10x to 1.25x.

“Covenant-lite” or “cov-lite” loans, which have no maintenance financial covenants and only incurrence-based covenants, have grown from under 20% of the leveraged loan market in 2013 to over 90% in the broadly syndicated loan market and roughly 40% to 50% of unitranche middle-market direct lending as of 2025 per Fitch Ratings data. Cov-lite structures reduce lender ability to force early restructuring, which the IMF and Bank of England have flagged as a risk factor.

Negative covenants and events of default

Negative covenants restrict what the borrower can do without lender consent. Common categories include limits on additional debt, restrictions on liens, caps on dividends and other restricted payments, restrictions on affiliate transactions, limits on asset sales, and change-of-control provisions. Events of default include payment default (usually with a five-day grace period for principal and 30 days for interest), covenant default (usually with a 30-day cure period), material misrepresentation, bankruptcy, cross-default to other material debt, and material adverse change (MAC).

Access vehicles: how investors put money into private debt

Institutional and individual investors access private debt through several vehicle structures. Each has different liquidity, tax treatment, and reporting characteristics.

Business development companies (BDCs)

A BDC is a regulated investment vehicle created by the Small Business Investment Incentive Act of 1980, taxed as a regulated investment company (RIC) that must distribute at least 90% of taxable income annually. BDCs are the largest access vehicle for private credit. Traded BDCs (Ares Capital ARCC, Blue Owl Capital OBDC, FS KKR FSK, Blackstone Secured Lending BXSL, Golub Capital GBDC) trade on the NYSE or Nasdaq like closed-end funds. Non-traded BDCs (Blackstone Private Credit Fund, HPS Corporate Lending, Apollo Debt Solutions) offer monthly or quarterly liquidity subject to redemption gates.

ARCC is the largest publicly traded BDC by market capitalization at approximately $14 billion as of Q1 2026, and Blackstone’s BCRED is the largest non-traded BDC at approximately $80 billion in net assets. Total BDC industry assets exceeded $350 billion by year-end 2025 per Wells Fargo Securities data.

Private funds

Institutional investors (pensions, endowments, sovereign wealth funds, family offices) access private debt through traditional closed-end fund structures with 8 to 10-year lives and 3 to 5-year investment periods. Fees are typically 1.0% to 1.75% management fee on invested capital plus a 10% to 15% carried interest above a 6% to 7% preferred return.

Interval funds and other retail-access vehicles

Interval funds are ’40 Act closed-end funds that offer quarterly redemption windows of 5% to 25% of fund assets. They offer ’40 Act protections, daily net asset value calculation, and 1099 tax reporting rather than K-1s. Assets under management in interval funds crossed $80 billion in 2025 per XA Investments data. Private credit interval funds include those from Apollo, Cliffwater, and Nuveen.

Insurance-linked structures

Life insurance companies have become one of the largest holders of private debt through affiliated asset managers. Apollo acquired Athene in 2022 and now uses Athene’s insurance balance sheet as the primary funding source for its direct origination platform. KKR owns Global Atlantic. Brookfield owns American Equity Investment Life. The affiliated insurer holds the loans; the asset manager earns fees on the associated AUM.

Private debt returns and how they compare

Private debt returns depend on strategy, vintage, and manager. Preqin publishes fund-level performance data that gives a reasonable benchmark for what investors have historically earned. The figures below are net of fees, based on internal rate of return (IRR), and reflect Preqin’s Q1 2026 data for vintages 2010 through 2020.

Strategy Median net IRR (2010-2020 vintages) Top-quartile net IRR
Direct lending 8.4% 11.2%
Mezzanine 10.7% 15.5%
Distressed debt 9.8% 16.9%
Special situations 10.2% 15.4%
Venture debt 9.1% 14.0%

Direct lending has produced consistent single-digit net returns with lower volatility than private equity or venture capital. Mezzanine and distressed have produced higher returns with higher volatility. The spread between top-quartile and median performance is meaningful, and manager selection is a major driver of realized outcomes.

Risks in private debt

Private debt is not risk-free, and several risks have become more visible since interest rates rose in 2022. Regulators including the IMF, Bank of England, US Financial Stability Oversight Council, and European Systemic Risk Board have all published assessments of private debt risks since 2023.

Credit risk

Private debt is lending to non-investment-grade borrowers. Middle-market companies have narrower operating margins, less financial flexibility, and more concentrated customer and supplier bases than large-cap borrowers. Default rates in private direct lending have historically averaged 1% to 3% annually, comparable to the syndicated leveraged loan market, but data quality is limited because most private debt loans are not covered by ratings agencies or public defaults databases.

Proskauer’s Private Credit Default Index, one of the few public private credit performance benchmarks, reported a 12-month default rate of 2.71% for senior secured private credit as of Q4 2024. KBRA’s private credit deal-level default study reported similar rates. Fitch’s US Middle Market CLO Index has reported rising downgrades since 2023.

Interest rate risk

Most private debt loans are floating rate, priced over SOFR. That protects the lender against rising rates but transmits rate stress to the borrower. When SOFR rose from near zero in early 2022 to over 5.3% by mid-2023, cash interest coverage on levered borrowers deteriorated meaningfully. Golub Capital’s mid-2024 credit review reported average interest coverage ratios in its portfolio had fallen below 1.5x, versus historical averages above 2.0x.

Liquidity risk

Private debt is illiquid by design. Loans are typically held to maturity or refinancing. Investors in closed-end fund structures accept 8 to 10-year lockups. BDC investors can trade the shares (for listed BDCs) or subject to gates (for non-traded BDCs). Interval fund investors face quarterly gates. If a large number of investors seek redemption simultaneously, the sponsor may gate or suspend redemptions.

Valuation risk

Private debt loans are not marked to market against a public trading price. Managers estimate fair value each quarter using discounted cash flow, comparable transaction multiples, or third-party valuation providers (Houlihan Lokey, Duff & Phelps, Alvarez & Marsal). Valuation practices have come under scrutiny from the SEC and academic researchers, who have documented instances of “NAV smoothing” where reported net asset value is less volatile than the underlying credit performance would suggest.

Concentration and correlation risk

The private debt industry is concentrated in a small number of large managers, which means shocks to any single manager can transmit broadly. It is also correlated with private equity because most private debt loans finance PE-owned companies. If PE portfolio company performance deteriorates broadly, private debt losses would rise in tandem.

Private debt vs syndicated leveraged loans

Private debt and the broadly syndicated loan (BSL) market compete for the same borrowers. The BSL market originates loans that are then syndicated to hundreds of institutional investors, primarily collateralized loan obligations (CLOs). The Loan Syndications and Trading Association reported BSL market outstanding balance of roughly $1.4 trillion at year-end 2024. Private debt (direct lending) crossed $2 trillion in global AUM.

Sponsors choose between the two markets based on deal size, execution speed, terms, and pricing. BSL loans typically fund deals above $500 million with lower coupons (SOFR + 300 to 500 bps) but require rating agency involvement, wide syndication, and public disclosure. Private direct lending funds middle-market deals with wider coupons but faster execution, smaller lender groups, and confidentiality.

2024 and 2025 saw significant “refinancing traffic” between the two markets. When BSL spreads tightened in mid-2024, several large borrowers refinanced their private direct loans into the BSL market. When BSL spreads widened, private direct lenders won market share back.

Regulatory environment

Private debt sits at the intersection of banking, securities, and insurance regulation. Because private debt lenders are non-banks, they are not subject to bank capital requirements. But they are subject to substantial rules under other frameworks.

SEC rules

Private debt fund advisers are typically registered investment advisers under the Investment Advisers Act of 1940. They must file Form ADV, comply with the SEC’s marketing rule, and adhere to fiduciary duties. The SEC’s Private Fund Adviser Rule (adopted August 2023, then largely vacated by the Fifth Circuit in June 2024) had attempted to impose quarterly performance reporting, restricted certain preferential treatment, and required annual audits. The vacatur left the pre-existing regulatory framework in place.

BDC-specific rules

BDCs are subject to the Investment Company Act of 1940 as amended by the Small Business Investment Incentive Act. They must maintain 200% asset coverage of debt (equivalent to 2:1 debt-to-equity or 1:1 debt-to-capital), which was lowered from 300% by the Small Business Credit Availability Act of 2018. They must distribute at least 90% of taxable income to shareholders. And they must invest at least 70% of assets in “qualifying assets” (primarily loans and equity of US private companies with public market cap below $250 million).

Insurance regulation

Because so much private debt now sits on insurance company balance sheets, the National Association of Insurance Commissioners has increased focus on private debt in insurance portfolios. The NAIC’s proposed changes to Statutory Accounting Principles No. 26R and No. 43R (finalized in stages 2023-2025) affect how insurers report private debt investments and could shift industry practices over time.

Frequently asked questions

Is private debt the same as private credit?

Not exactly. Private debt is the wider umbrella asset class that includes performing loans (private credit), stressed and distressed debt, mezzanine, PIK notes, venture debt, and specialty finance. Private credit typically refers to performing direct lending to non-investment-grade borrowers, most often owned by private equity sponsors. Preqin, Bain, and the Alternative Credit Council treat “private debt” as the top-level term and “private credit” as the largest subset, though the terms are often used interchangeably in industry conversation.

How risky is private debt?

Private debt is investment-grade to below-investment-grade credit risk with limited liquidity. Historical default rates in private direct lending have averaged 1% to 3% annually according to Proskauer, KBRA, and Fitch data, comparable to broadly syndicated leveraged loans. Because loans are senior secured, recovery rates in default are typically 60% to 75% of principal. The main risks are credit deterioration in a downturn, interest rate stress on floating-rate borrowers, valuation uncertainty in illiquid loans, and manager concentration risk in a market dominated by a small number of large asset managers.

What returns does private debt generate?

Median net internal rate of return for direct lending (the largest strategy) has run 8% to 9% across 2010-2020 vintages according to Preqin, with top-quartile funds delivering 11% to 12%. Mezzanine and distressed debt strategies target higher returns of 12% to 18% net, with correspondingly higher volatility and vintage sensitivity. Returns are net of management fees (typically 1.0% to 1.75%) and carried interest (10% to 15% above a preferred return hurdle).

How do I invest in private debt as an individual?

Individual investors have three main routes. Publicly traded BDCs (ARCC, OBDC, FSK, BXSL, GBDC) trade like stocks on the NYSE and Nasdaq and are accessible in any brokerage account. Non-traded BDCs and interval funds require an account with a broker-dealer that carries the product, typically with a $2,500 to $10,000 minimum, and are subject to accredited investor or qualified purchaser suitability rules depending on the specific vehicle. Institutional-grade private debt funds are usually restricted to institutional investors and family offices.

Who are the largest private debt lenders?

The largest US private debt managers by credit AUM as of Q1 2026 include Apollo Global Management (roughly $600B total credit), Blackstone (approximately $354B), Ares Management ($335B), KKR Credit ($260B), Oaktree ($205B), Blue Owl Capital ($174B), HPS Investment Partners (now part of BlackRock, $149B), Sixth Street ($110B), Antares Capital ($85B), and Golub Capital ($70B+). The industry is highly concentrated. The top 10 managers control the majority of institutional direct lending flow to sponsor-backed borrowers.

What is the difference between direct lending and mezzanine?

Direct lending is senior secured first-lien lending priced at SOFR plus 500 to 700 basis points, with 60% to 75% recovery in default. Mezzanine is subordinated debt sitting below senior loans in the capital structure, priced at 10% to 14% fixed coupons plus warrants or PIK, with 20% to 40% recovery in default. Direct lending targets 9% to 12% net IRR; mezzanine targets 14% to 18% net IRR with higher risk. Unitranche loans, which combine senior and subordinated tranches into one instrument, have largely replaced separate senior-plus-mezzanine structures in middle-market sponsor deals.

What is a business development company (BDC)?

A BDC is a US regulated investment vehicle created by the Small Business Investment Incentive Act of 1980, designed to invest in private US companies. BDCs are the largest access vehicle for private credit and must distribute at least 90% of taxable income to shareholders, invest at least 70% of assets in qualifying private US companies, and maintain 200% asset coverage of debt. Publicly traded BDCs (ARCC, OBDC, BXSL, GBDC, FSK) can be bought in any brokerage account. Non-traded BDCs (BCRED, Apollo Debt Solutions, HPS Corporate Lending) offer monthly or quarterly liquidity subject to redemption gates.

How does private debt fit into a leveraged buyout?

Private debt provides the debt piece of the LBO capital structure. A typical middle-market LBO uses 4.5x to 6.5x leverage of debt-to-EBITDA, financed with a senior secured unitranche loan (single-tranche) or a first-lien plus second-lien structure. The private equity sponsor contributes the remaining 40% to 55% of the total purchase price as equity. Understanding the sequencing of an LBO transaction, including how the debt is sized, priced, documented, and funded, is essential for anyone selling to or partnering with a private equity firm.

Working with CT Acquisitions

If you are a business owner considering a sale, recapitalization, or dividend financing transaction, the choice of financing partner matters as much as the choice of equity partner. CT Acquisitions is a lower-middle-market M&A advisory firm focused on sell-side and buy-side transactions for businesses with $5 million to $50 million in enterprise value. We work directly with both private equity buyers and non-sponsor lenders across the direct lending, unitranche, mezzanine, and PIK markets to structure transactions that meet seller objectives on price, structure, and timing.

Our approach reflects lower-middle-market specifics that larger investment banks are not built to serve. We run curated buyer outreach rather than mass-marketed auctions. We maintain direct relationships with the coverage teams at Ares, Antares, Blue Owl, Golub, Twin Brook, Monroe, Churchill, and other named direct lenders. Our fee structure aligns with the seller, with transparent retainers and success fees paid on close, not on listing. Every engagement is led by a senior advisor rather than delegated to junior associates. To discuss a potential sale, recapitalization, or debt structuring, schedule a 30-minute exit-readiness call at ctacquisitions.com/contact-us/.

Sources and further reading

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CT ACQUISITIONS

Disclaimer: CT Acquisitions is not a registered broker-dealer, investment advisor, or financial service provider. We act solely as a buy-side consultant and independent sponsor source. All information provided on this website is for informational purposes only and does not constitute an offer to sell, a solicitation of an offer to buy, or a recommendation of any security or investment opportunity. We do not provide legal, tax, or accounting advice. Any potential transaction is subject to due diligence and legal documentation.

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