The private credit industry has evolved dramatically over the past decade. What began with relatively straightforward direct lending has since expanded into a dizzying array of funding arrangements and assets that each have their own unique traits and considerations. That proliferation of sub-strategies has spurred the development of numerous types of fund structures and variations in distribution mechanics designed to address the diverse needs of all applicable parties involved in the fund process.
Against that backdrop, sponsors need to design fund waterfall structures to suit the characteristics of the underlying portfolio construction. Yield-oriented strategies emphasizing current income (e.g., senior direct lending) favor current income-driven structures that align GP incentives with income generation, while providing LPs with regular distributions. Conversely, opportunistic and capital appreciation-oriented strategies (e.g., distressed debt) typically employ the more conventional carry structures in traditional European or modified American-style waterfalls.
This first article in a two-part series describes the core asset types, features, complications and return profiles of various private credit asset classes, including infrastructure debt and dislocation funds. The second article will outline several types of waterfall structures – and relevant variations within each – that are used to align with the risk, reward and return profiles of each asset class.
See “Evolution of the Private Credit Industry and Ongoing Challenges” (Feb. 19, 2026).
Private Credit Adoption
Growth and Accelerators
It is well publicized that private credit grew as an asset class in the wake of bank retrenchment following the 2008 global financial crisis (GFC). According to PitchBook, global assets under management (AUM) exceed $2 trillion as of June 30, 2025 – up from approximately $500 billion in 2014. That growth is expected to accelerate in the coming years, with Preqin’s Global Report for Private Credit 2026 forecasting AUM to reach $4.5 trillion by 2030.
One of the most notable AUM accelerators, per PitchBook, has been private wealth channels, with perpetual private vehicles for private wealth raising $86.4 billion in H1 2025. That is expected to accelerate further as the retailization of private markets gains momentum in the coming years, as exemplified by the U.S. Department of Labor’s March 2026 proposed regulations outlining how managers of employer-sponsored 401(k) plans and other participant-directed defined contribution plans (DC Plans) can include alternative assets in the plans they manage.
Insurance companies are also responsible for the growth in private credit AUM, with insurance-related trailing 12‑month inflows to credit strategies approaching $150 billion in H1 2025 among the top seven U.S. public alternative asset managers. Life and annuity insurers held an estimated $1.8 trillion in private credit in 2025, according to a special report issued by A.M. Best.
Many large insurers – particularly asset manager-backed insurers – have increasingly turned to offshore reinsurance arrangements. Products such as multi-year guaranteed annuities have also played a central role, enabling insurers to benefit from interest rate spreads and higher yields from private credit investments while simultaneously aligning asset durations with long-term liabilities and managing duration exposure.
See “Retailization Season Is Heating Up: A Private Fund Manager’s Guide to Structuring, Procedures and Fundraising” (Jun. 12, 2025); and “Attraction of Using Insurance Dedicated Funds in Season‑and‑Sell Private Credit Structures and As ‘Evergreen’ PE Vehicles” (Jul. 19, 2022).
Headwinds
After more than a decade of explosive growth and on the cusp of expansion into 401(k) plans, headwinds for private credit have begun to emerge. Those developments are prompting some market participants to reexamine their portfolio allocations, reassess the strength of their private credit positions and inquire as to the potential systemic impact, if any, if private credit default rates rise.
Market concerns were reflected in closed-end private credit fundraising ending 2025 on a relatively weak note, which Preqin attributed to “LP concerns about tariffs, rates, or credit quality of existing credit funds.” At the same time, there has been increased manager consolidation as investor preferences have shifted to more experienced, highly diversified managers to navigate a potentially choppy credit cycle. Further, despite private credit being perceived as less correlated with public market sentiments, managers are facing more scrutiny amidst notable market developments, including:
- increased redemption requests from private credit business development companies, interval funds and other semi-liquid funds;
- well-publicized mark-downs of software-related private loan collateral values by certain banks; and
- bankruptcies among certain automotive manufacturers.
Those issues are exacerbated by increased regulatory attention private credit and insurance. Specifically, the Federal Insurance Office (FIO) and the Financial Stability Oversight Council (FSOC) have publicly acknowledged the rise in private credit/insurance inter-connectivity, and have expressed a need for market monitoring and increased transparency. Both regulators have also called on state insurance commissioners to continue progressing their regulatory work in this area.
In addition, the U.S. Department of the Treasury (which chairs FSOC) announced that it would convene a series of meetings through the summer of 2026 with domestic and international insurance regulators focused on private credit markets, and would continue to survey recent market events, emerging risks, risk management practices and outlooks for the sector. Although details remain uncertain, those meetings are expected to move forward with more formality than routine FIO/state insurance regulator coordination.
Similarly, in a joint proposal issued in April 2026, the SEC and the CFTC acknowledged the significant rise in private credit when the agencies requested public comment on whether to modify the information that advisers must report about private credit funds on Form PF.
See “Private Credit Valuations Under Pressure: Enforcement Trends, Litigation Risks and Mitigation Tactics” (May 14, 2026).
Private Credit Product Design
Overview
Private credit headwinds and tighter LP underwriting and diligence processes have increased the importance of well-tailored product design in a market that no longer competes on asset valuations alone. Instead, there is a greater focus on other factors, including:
- liquidity profile;
- ratings criteria;
- distributions to paid-in capital;
- wealth channel compatibility;
- use of leverage;
- downside protection; and
- the ability to blend asset packages into tailored product wrappers across various customized risk-adjusted return and liquidity profiles.
This competition – both within private credit and as between private credit and other asset classes – has led to a proliferation of sub-asset classes within private credit, with managers diversifying their offerings well beyond core middle-market direct lending strategies.
Nowadays, competing at the highest level often means having wide aperture sourcing funnels capable of evaluating and swiftly executing on a broad range of strategies and fund types, including:
- large cap;
- middle market;
- opportunistic;
- asset-based lending (ABL);
- special situations;
- structured products;
- specialty finance; and
- esoteric lending strategies, including:
- distressed workouts;
- dislocated opportunities;
- music royalty financings;
- infrastructure;
- real estate;
- public-private partnerships;
- defense and national security financings;
- sports;
- GP stakes;
- secondaries;
- synthetic risk transfers;
- insurance solutions; and
- fund finance.
Capital deployment must shift nimbly in tandem with shifts in opportunities and market conditions to avoid a “race to the bottom” mentality where mono, direct lending strategists can be tempted to overextend or lose discipline in an effort to chase absolute returns.
As such, sponsors must identify and delineate the contours of the underlying portfolio to ensure that fund-level features are compatible therewith, including:
- type of collateral and security;
- yield;
- tenor;
- interest rate;
- amortization;
- capitalization requirements;
- upside and downside features;
- use of leverage;
- liquidity;
- ratings compatibility;
- cost of capital;
- return profile; and
- targeted investor base.
A mismatch between the assets and the fund-level design features can lead to unhappy investors, even if the internal rate of return (IRR) numbers are fine on paper.
Asset Class Descriptions and Features
The following are certain core asset descriptions and related return drivers of various private credit asset classes, which fund managers can flexibly adapt when determining which features align with their desired portfolio and investor base.
Direct Lending
In the immediate aftermath of the GFC, market participants often referred to direct lending as non-bank lenders providing private, senior-secured financings to sponsor-backed, middle market companies in connection with M&A deal activity. Large cap companies commanded access to traditional bank lending, and it was not immediately apparent that those companies would need alternative sources of capital. With the growth of private credit and the coronavirus pandemic’s impact, however, direct lending has become a mainstream financing source for sponsor- and non-sponsor-backed companies alike. Larger cap companies now often simultaneously solicit bids from both bank and non-bank lenders.
In addition to commanding an “illiquidity premium” (i.e., a bigger spread to benchmark rates relative to the public debt markets), direct lending typically offers more flexible features than traditional bank loans, including:
- a variety of lending structures, such as:
- delayed draw term loans;
- unitranche facilities;
- revolving credit lines; and
- first loss positions;
- increased closing speed;
- single-source execution capability;
- greater ability to digest and structure around complexity; and
- more stability through turbulent market cycles, particularly when paired with permanent, institutional capital.
Direct lending funds also often offer levered and unlevered entry points, so investors with differing risk tolerances, tax profiles or portfolio composition needs can target different return profiles while investing in the same financial instrument. In those scenarios, unlevered gross return targets often range from 6‑10%, and levered return gross targets typically range from 10‑15%.
Private direct lending remains a strong capital preservation allocation, with regular way coupon payments generating consistent current income at a relative spread to reference rates. Further, within the direct lending category there are a variety of opportunistic strategies catering to:
- a mix of first lien, second lien, mezzanine and junior unitranche positions;
- a slew of corporate borrower types, size, credit quality and use cases; and
- a variety of return profiles, based on various factors, including:
- different portfolio compositions;
- uses of leverage and leverage limits;
- level of origination activity;
- expected hold-to-maturity relative to early secondary sales; and
- prepayments and refinancings.
The factors contributing to a broad range of return profiles also play important roles in determining the core drivers of the return, the assets’ liquidity, the distribution frequency and the right incentive structure to achieve optimal sponsor alignment.
For those reasons, direct lending was arguably the most prominent private credit strategy at the outset of the asset class. Despite the emergence of other private debt asset categories, direct lending strategies still comprised 61.5% of overall private debt AUM raised in 2025 through the end of Q3, according to Preqin.
Mezzanine Debt and Unitranche Lending
Mezzanine debt is used when borrowers require additional financing capacity beyond what traditional senior lenders are willing to provide, and when mezzanine’s subordinated position in the capital structure commands a premium return commensurate with its elevated credit risk. To that end, common use cases for mezzanine financings include leveraged buyouts, recapitalizations and add-on acquisitions.
Within the capital structure, mezzanine debt occupies a subordinated position relative to senior debt and is typically unsecured, commanding return profiles in the range of 11‑18% gross IRR. Mezzanine debt financing often incorporates a combination of cash-pay coupons; payment-in-kind interest; and equity warrants or other kickers. By comparison, unitranche lending structures blend senior and subordinated debt into a single facility, offering return profiles higher than traditional senior debt but below standalone mezzanine positions.
Unitranche facilities have grown in popularity due to their simplicity for borrowers, who benefit from dealing with a single lender or lender group rather than negotiating separate senior and mezzanine tranches, while lenders capture a blended yield that reflects the mixed risk profile of the combined facility. The growth of unitranche lending has coincided with the growth of private lenders, who are now able to underwrite much bigger tickets and carve up the allocation among lenders on the back end.
Distressed Debt and Special Situations
Distressed debt strategies generally involve the purchase of securities or loans in the secondary market at a discount, with managers identifying the “fulcrum” securities – i.e., the most subordinated part of the capital stack likely to convert into or receive equity in a bankruptcy or restructuring – which can trade at steep discounts to net asset value (NAV). By contrast, special situations strategies often involve the direct origination of hybrid structures such as convertible debt, convertible preferred equity and debt with warrants. Issuances by special situations funds are generally made with the intent of gaining control of a company experiencing some form of financial distress.
Special situations funds often intervene prior to a company’s bankruptcy, whereas distressed strategies are often involved during the bankruptcy process itself. Commensurate with the levels of risk they entail, distressed debt and special situations strategies represent the higher returning end of the private credit spectrum, with gross IRR targets often ranging from 15‑25%.
Some managers have blended their traditional distressed debt businesses into broader “opportunity” or “capital solutions” funds, naturally shifting capital from distressed towards “opportunistic” classifications as further described below. Those labels can often make it difficult to establish bright-line strategy classifications, but allow managers to flexibly shift deployment to pursue the most attractive investment opportunities.
Asset‑Based Lending
ABL strategies are distinguished by their reliance on specific assets or receivables as collateral, rather than the general creditworthiness of the corporate borrower. ABL encompasses a wide range of sub-strategies, including:
- trade finance;
- receivables financing;
- equipment finance;
- litigation finance;
- royalty financing;
- residential mortgages;
- consumer credit portfolios;
- student loans;
- buy now, pay later loans;
- whole business securitizations;
- automobile leases;
- aviation finance;
- maritime;
- fund finance; and
- significant risk transfer transactions.
Return profiles for ABL strategies can vary widely based on how one characterizes ABL and the use of leverage, and often range from 6‑17% gross IRR. The lower end of the range reflects the lower risk profile that can exist in certain situations via the use of tight covenants and close collateral monitoring, in addition to the inherent defensive features of ABL such as its self-amortizing nature and recourse to collateral.
The ABL market has traditionally been dominated by specialty lenders, platform originators, banks and securitizations, which has led many private credit managers to source deals by pursuing strategic partnerships with banking institutions, online lending platforms and other asset originators. Proper sourcing and execution of ABL strategies often requires specialization in niche industries or sectors, including valuing potentially esoteric assets, and as such, can present a unique advantage to a sponsor seeking to offer a differentiated capability.
However, a proliferation of ABL participants in the market has also led to some lower quality lenders. The sheet size of the potential addressable ABL market – alongside the securitizable nature of cash-generating, self-amortizing assets – has also drawn parallels to the residential mortgage-backed securitizations that contributed to the GFC. Accordingly, regulators have inquired as to the systemic impact on the economy if some private lenders adopt loose ABL underwriting standards.
Infrastructure Debt
Infrastructure debt has emerged as a compelling component of private credit portfolios, providing diversification, attractive risk-adjusted returns, low default rates and downside protection. The strategy focuses on lending to long-term, real asset projects such as toll road operators, utilities, renewable energy facilities, data centers and telecommunications infrastructure, all of which typically possess several notable characteristics:
- the provision of essential services with relatively inelastic demand;
- long asset lives;
- stable and visible cashflow generation under long-term contracts;
- high barriers to entry;
- inflation-correlated revenues; and
- high operating margins.
Infrastructure debt return profiles are typically in the 5‑10% gross IRR range and often feature inflation-linked returns. Infrastructure debt has also demonstrated low correlation to corporate credit, making it an effective diversifier within broader private credit portfolios. The strategy has proven particularly attractive to insurance companies and pension funds seeking stable long-term income with low volatility.
Real Estate Debt
Real estate debt strategies encompass bridge loans, mezzanine financing and preferred equity structures secured by hard real estate assets. Common use cases include financing for transitional assets, development projects and refinancing bridges where borrowers require flexible capital solutions that traditional lenders may be unwilling or unable to provide. The return profiles for real estate debt typically range from 8‑15% gross IRR depending on the risk profile and capital structure position.
NAV Lending and Subscription Facilities
NAV lending has emerged as a growing niche within private credit, involving loans secured by the NAV of PE fund portfolios that GPs can use during liquidity crunches or for fund-level financings. Subscription loans are a related type of financing, which are collateralized by LP commitments to PE funds. Both NAV and subscription facilities are historically considered lower-risk lending by banks, with return profiles typically in the 10‑15% gross IRR range, depending on structure.
See “The State of NAV Loan Facilities in the PE Industry and Current Obstacles to Widespread Adoption” (Feb. 9, 2023).
Venture Debt
Venture debt provides financing to startups and growth-stage companies to help entrepreneurs extend their runway to exit without further diluting ownership. Startups also use venture debt to restructure their capitalization as they position for an IPO. Given the prominent role of artificial intelligence in the venture capital community, venture debt providers may benefit as founders hunt for a cheaper cost of capital relative to equity.
The return profiles for venture debt strategies are typically in the 10‑18% gross IRR range comprising both cash yield and equity upside through warrants or other equity kickers. The collateral base for venture debt – often secured by intellectual property or equity warrants – is typically lighter than traditional corporate lending due to the companies often being cashflow negative.
Credit Opportunities and Dislocation Funds
Credit opportunities funds represent a flexible, multi-strategy approach to private credit investing, with broad mandates that allow managers to deploy capital across the risk spectrum, depending on market conditions. The breadth of the mandate distinguishes credit opportunities funds from more narrowly focused strategies, providing managers with the flexibility to pursue relative value across sub-asset classes while maintaining a cohesive risk management framework. These funds typically target gross IRRs in the 10‑18% range and may invest in performing senior loans; stressed or distressed credits; structured products; and rescue financings.
Dislocation funds are a subset of opportunistic credit strategies specifically designed to capitalize on market dislocations – i.e., periods when forced selling, liquidity crunches or macroeconomic stress create pricing inefficiencies in credit markets. These funds often target gross IRRs of 15‑25% – similar to distressed debt strategies – but with a focus on acquiring performing or lightly stressed credits at discounted prices rather than engaging in traditional bankruptcy or restructuring processes. Dislocation funds often have shorter investment periods and accelerated deployment timelines to capture episodic opportunities, and their returns are driven primarily by the discount to fair value at entry rather than operational improvements or restructuring gains.
See this three-part series on contingent dislocation funds and market disruptions: “Appeal, Application and Adoption Before Adverse Events” (Mar. 15, 2022); “Unique Mechanisms That Position Them to Pounce” (Mar. 22, 2022); and “Suitable Fund Participants and Potential Downsides to Avoid” (Mar. 29, 2022).
Samuel Weber is a partner in the New York office of Willkie Farr. He advises fund sponsors on a wide range of strategic and operational matters, including the formation, marketing and management of private investment funds; portfolio investment activities; fund regulatory and compliance matters; and firm ownership and operational issues. He has extensive experience advising managers of credit platforms on a wide range of issues, including the formation of closed-end and open-end direct lending, mezzanine, asset-based credit, special situations, specialty finance, aviation, opportunistic and distressed funds. He also advises diversified asset managers in connection with the launch of their credit platforms, including on related regulatory, compliance and operational issues.
John M. Knapke is a partner in the New York office of Willkie Farr. His practice focuses on private investment funds. In the area of fund formation, he has assisted sponsors with the formation of closed-end domestic and international funds, including funds focused on growth equity, distressed debt, energy, mezzanine and real estate investments. In addition to his sponsor-side work, he regularly advises investors in connection with primary and secondary investments.