The Middle-Market Strategy That Built a $70 Billion Empire

Private equity firms compete for the same large transactions, driving up valuations and compressing returns. Sami Mnaymneh identified this dynamic three decades ago and chose a different path. Rather than chasing billion-dollar deals from New York or Boston, he launched HIG Capital from Miami in 1993, targeting companies most mega-funds ignored.

The strategy centered on middle-market businesses with enterprise values between $50 million and $500 million. These companies needed sophisticated capital partners but couldn’t attract attention from firms focused on transactions ten times larger. Less competition meant better entry prices. Smaller companies offered greater operational improvement potential than mature, well-managed corporations.

The thesis proved correct. HIG Capital now manages $70 billion across seven investment strategies, operates 19 offices worldwide and has invested in more than 400 companies. Mnaymneh serves as founder, executive chairman and CEO, maintaining operational involvement unusual for an organization of this scale.

Academic Foundation

Before entering finance, Mnaymneh assembled credentials that would prove essential. He graduated first in his class at Columbia University with a B.A. summa cum laude. He then completed simultaneous graduate programs at Harvard University, earning a J.D. from Harvard Law School and an M.B.A. from Harvard Business School, both with honors.

This dual training provided tools most private equity practitioners lack. Transactions require navigating corporate law, securities regulations and tax structures alongside financial analysis. The legal background complemented business school’s focus on finance and operations, creating expertise suited for structuring complex deals.

Following graduate school, Mnaymneh joined Morgan Stanley’s New York offices. The investment bank’s private equity activities were expanding in the early 1990s as the industry developed modern practices. He subsequently moved to The Blackstone Group as a managing director, gaining experience at one of the sector’s pioneering firms.

Blackstone exposed Mnaymneh to sophisticated investment approaches but focused primarily on large transactions. The experience revealed a market gap. Thousands of middle-market companies needed capital solutions, but mega-funds found these deals too small to justify the effort required.

Market Inefficiency

In 1993, private equity remained far smaller than today’s industry. Total assets under management measured in billions rather than trillions. Middle-market investing was fragmented, with regional firms and family offices providing most capital. Few dedicated platforms combined institutional-quality processes with middle-market focus.

Mnaymneh and co-founder Tony Tamer identified this as opportunity. Middle-market companies faced limited financing options. Banks provided debt but rarely equity. Public markets were inaccessible to companies generating $50 million to $500 million in revenue. Local investors lacked sophistication to add operational value beyond capital.

This disconnect created market inefficiency. Less competition for deals should translate to better entry valuations. Middle-market companies often had operational issues that sophisticated investors could address. These problems represented value creation opportunities rather than obstacles.

However, middle-market investing required different capabilities than large-cap transactions. Smaller companies typically lacked strong management teams, robust financial systems and operational best practices. Creating value meant hands-on work on business fundamentals rather than relying solely on financial engineering.

HIG Capital built capabilities to address these requirements. The firm hired investment professionals combining finance expertise with operating backgrounds. Many came from consulting or previous operational roles rather than pure banking pedigrees. This reflected Mnaymneh’s belief that middle-market success required understanding business operations alongside financial modeling.

Platform Architecture

HIG Capital began as a traditional leveraged buyout fund targeting manufacturing and service businesses. The initial strategy involved acquiring controlling stakes, improving operations and exiting after 4-7 years through sales or public offerings.

Over time, Mnaymneh expanded the platform to include complementary strategies. The firm now operates funds dedicated to growth equity, direct lending, real estate, infrastructure, special situations debt and growth-stage healthcare.

Each strategy addresses different opportunities within the middle market. Growth equity targets businesses not ready for buyouts but needing capital to scale. Direct lending provides flexible debt as banks reduced middle-market lending. Real estate focuses on properties requiring operational improvements. Infrastructure targets essential service providers with predictable cash flows.

The multi-strategy approach creates several advantages. HIG Capital can provide various forms of capital to companies at different development stages. A business might receive growth equity initially, later refinance with HIG Capital debt, then pursue a buyout backed by the private equity funds.

Diversification also generates more consistent cash flows to limited partners. Buyout funds typically return capital through exits concentrated in years 4-7 of a fund’s life. Debt funds produce regular income. Real estate and infrastructure generate periodic distributions. The combination smooths returns over time.

Lending Platform Economics

WhiteHorse, HIG Capital’s direct lending arm, exemplifies successful strategy expansion. The platform launched to provide middle-market companies with flexible debt capital as banks retreated from lending following the 2008 financial crisis.

WhiteHorse has invested approximately $18 billion in 285 companies since inception. The platform closed its fourth fund at $5.9 billion in August 2025, demonstrating substantial institutional demand. Fund IV targets senior secured loans to both sponsor-backed and non-sponsor borrowers with EBITDA between $30 million and $100 million.

Direct lending has grown attractive as interest rates have risen from near-zero levels during the 2010s. Senior secured floating rate loans now offer returns in the high single digits to low teens, depending on credit quality and structure. The strategy provides downside protection through senior positions in capital structures while generating current income.

The economics appeal to institutional investors seeking alternatives to traditional fixed income. Government bonds offer lower returns. Corporate bonds carry credit risk without the structural protections direct loans provide. Direct lending fills a gap between public debt and equity risk profiles.

WhiteHorse competes with banks, business development companies and other direct lenders. Differentiation comes through flexible terms, execution speed and relationships developed through HIG Capital’s broader platform. Companies already working with HIG Capital strategies provide natural deal flow.

Centralized Decision Architecture

Mnaymneh maintains personal approval authority over all capital commitments HIG Capital makes. This centralized control distinguishes the firm from most private equity platforms managing similar assets.

The typical model for large alternative investment firms involves delegating investment authority to fund managers or investment committees. Individual strategies operate with substantial autonomy once approved by senior leadership. This allows firms to pursue opportunities across multiple strategies and geographies simultaneously.

Mnaymneh has chosen different architecture. He reviews transactions across seven strategies, 19 offices and multiple continents. Each requires understanding industry dynamics, assessing management quality, evaluating competitive positioning and determining appropriate capital structures.

This approach creates both benefits and costs. Centralized decision-making ensures consistency in investment criteria and risk management. It prevents individual teams from pursuing transactions that don’t align with firm-wide standards. The process forces disciplined due diligence and clear strategic rationale before committing capital.

However, the structure also creates potential constraints. Investment professionals must coordinate schedules to present opportunities. Time-sensitive deals may face delays if Mnaymneh is unavailable. Competitors with distributed authority can sometimes execute faster on transactions requiring rapid decisions.

Three decades of results suggest Mnaymneh believes the benefits justify the costs. The firm has grown substantially while maintaining this management structure, indicating the centralized approach hasn’t prevented capital deployment or constrained returns.

Geographic Expansion Economics

HIG Capital operates affiliate offices across five continents. European locations include Hamburg, London, Luxembourg, Madrid, Milan and Paris. Latin American offices span Bogotá, Rio de Janeiro and São Paulo. Additional offices in Dubai and Hong Kong provide presence in the Middle East and Asia.

Geographic diversification serves multiple purposes. It provides access to deal flow beyond increasingly competitive U.S. markets. European middle-market private equity faces somewhat different dynamics than U.S. markets, with different regulatory frameworks, financing structures and exit options.

Recent European transactions demonstrate platform activity. Investments in 2025 included Finnish waste management company Fluo Group, Spanish occupational health provider Avanta Salud, German machine tool manufacturer HELLER Group and French textile services business France Workwear.

International expansion required substantial investment in local capabilities. European deals involve different legal systems, tax structures, labor regulations and banking relationships than U.S. transactions. Cultural differences affect management practices and negotiation dynamics.

HIG Capital built teams in each market rather than attempting remote oversight. This decision reflected lessons from firms that struggled with international expansion by trying to manage globally from single headquarters. Local expertise proved essential for sourcing deals, conducting due diligence and working with portfolio companies post-acquisition.

Secondaries Market Entry

HIG Capital announced plans in late 2025 to raise $1.5 billion for a vehicle focused on GP-led continuation funds. The initiative represents entry into the growing secondaries market where the firm previously had limited presence.

The strategy involves investing in continuation vehicles other private equity firms create to extend ownership of high-performing assets. These structures allow sponsors to move valuable portfolio companies from existing funds into new continuation vehicles, retaining ownership beyond typical holding periods while providing liquidity to original limited partners.

Continuation funds have grown popular as traditional exit options have become constrained. Elevated interest rates have curtailed both IPO activity and strategic acquisition volumes. Public markets remain volatile. Corporate acquirers show restraint given economic uncertainty. These conditions have extended average holding periods from 4-6 years historically to 7+ years currently.

Continuation funds provide alternative liquidity mechanisms. They allow private equity firms to realize partial value through recapitalizations while retaining ownership. Limited partners can exit positions if desired, while those preferring continued exposure can roll investments into continuation vehicles.

To build this capability, HIG Capital recruited four executives from Morgan Stanley’s private equity secondaries team. Managing Director Dan Wieder leads the group, bringing decades of secondaries experience. The team will focus on middle-market continuation vehicles, investing at least $50 million in approximately 20 transactions.

The secondaries strategy represents opportunistic expansion into a growing market. However, it also reflects adaptation to market conditions. With traditional exits constrained, providing liquidity to other managers creates deal flow independent of IPO or M&A markets.

Performance Dynamics

Private equity firms guard performance data closely. However, certain indicators suggest HIG Capital has generated competitive returns. The firm successfully raised successively larger funds over three decades. Institutional investors allocate capital based on track records, not marketing materials.

The ability to attract $5.9 billion for a single lending fund demonstrates investor confidence. Pension funds, endowments, insurance companies and sovereign wealth funds conduct extensive due diligence before committing capital. Large allocations reflect conviction in both strategy and execution capability.

HIG Capital’s portfolio scale provides another measure. Managing over 100 active investments with combined revenues exceeding $53 billion requires consistent deal flow and effective portfolio management. The firm must generate sufficient exits to return capital to limited partners while maintaining steady deployment rates.

Mnaymneh’s personal wealth reflects three decades of earning management fees and carried interest, though specific figures remain private. Private equity compensation structures typically provide base salary, annual bonuses and carried interest on profitable investments. Carried interest represents the general partner’s share of profits, usually 20% after returning capital and preferred returns to limited partners.

For a firm managing $70 billion, even a modest 1.5% management fee generates over $1 billion annually. While this revenue funds operations and salaries for over 1,000 employees, founders retain substantial economics from both management fees and carried interest on successful investments.

Market Cycle Navigation

Mnaymneh and his team have managed through multiple economic cycles. The firm navigated the dot-com bust in 2000-2002, the 2008 financial crisis and the COVID-19 pandemic while continuing to raise capital and complete transactions.

Each cycle presented different challenges. The dot-com bust primarily affected technology investments. The 2008 crisis created broad economic contraction and frozen credit markets. COVID-19 caused sudden revenue disruptions across many sectors.

The middle market where HIG Capital operates demonstrated relative resilience through these periods. Smaller companies have limited access to public capital markets regardless of economic conditions, creating consistent demand for private capital. Competition for deals intensified during boom periods but never disappeared entirely during downturns.

This resilience reflects structural characteristics of middle-market private equity. Companies in this segment need capital for growth, recapitalization or ownership transition regardless of broader market conditions. Family-owned businesses require succession planning. Management teams pursue buyouts. Companies need financing for acquisitions or operational investments.

HIG Capital’s multi-strategy approach also provided flexibility during different cycle phases. When equity valuations appeared stretched, the firm could deploy more capital through debt strategies. When debt markets tightened, equity strategies could pursue opportunities. Real estate and infrastructure provided diversification benefits.

Leadership Continuity Questions

Mnaymneh and Tamer remain actively involved more than 30 years after founding HIG Capital. This longevity raises questions about succession planning and leadership transition.

The firm has developed senior management across regional offices and strategy-specific funds. Managing directors operate with substantial autonomy, though Mnaymneh retains ultimate approval authority. This structure balances operational independence with centralized oversight.

HIG Capital has not publicly addressed succession timing or transition plans. The development of deep leadership ranks suggests preparation for eventual change, though timing remains unclear.

Succession planning presents challenges for private equity firms. Founders often establish distinctive investment approaches and organizational cultures that prove difficult to maintain through leadership changes. Some firms have struggled when founders departed, while others managed smooth transitions.

The question becomes increasingly relevant as Mnaymneh continues in operational roles after three decades. At some point, the personal approval requirement may become difficult to sustain as transaction volumes grow across multiple strategies and geographies.

Current Market Environment

The private equity industry confronts headwinds entering 2026. Interest rates remain elevated compared to the 2010s, increasing borrowing costs and reducing leverage multiples. Exit markets have slowed as both strategic buyers and public markets show restraint.

These conditions create performance pressure. Private equity historically relied on multiple expansion and financial leverage to amplify returns. With purchase price multiples near historical peaks and debt more expensive, operational improvements must contribute more to value creation.

The middle market where HIG Capital operates faces somewhat different dynamics. Smaller companies have limited access to public capital markets, creating consistent demand for private capital regardless of broader conditions. Competition for deals remains intense but may be less extreme than for mega-deals attracting numerous large funds.

However, exit challenges affect all market segments. Strategic buyers remain active but selective. Public market volatility constrains IPO activity. Continuation funds provide alternative liquidity mechanisms but at valuations that may not satisfy all investors.

These conditions require adaptation. Private equity firms must focus more on operational value creation. Holding periods will likely remain extended. Distribution rates to limited partners may slow. However, fundamental demand for private capital persists across middle-market companies.

The Path Forward

As HIG Capital approaches its 35th anniversary, Mnaymneh continues pursuing growth opportunities. The secondaries initiative, ongoing European expansion and fundraising across multiple strategies indicate sustained ambitions.

Whether a $70 billion platform can continue growing depends on market conditions and execution quality. Larger firms face challenges deploying capital efficiently while maintaining return standards. Some private equity firms have struggled after growing too large to execute their original strategies effectively.

HIG Capital’s multi-strategy approach provides flexibility but requires coordinating complex operations. Managing seven investment strategies across 19 offices demands sophisticated systems and communication processes.

The personal approval requirement Mnaymneh maintains may become increasingly difficult to sustain as transaction volumes grow. However, three decades of results suggest he has built a durable organization capable of adapting to changing conditions.

The middle-market strategy that seemed unconventional in 1993 has proven remarkably durable. Thousands of companies continue needing sophisticated capital partners. Competition has intensified but opportunities persist. For now, the executive who identified this market inefficiency three decades ago continues leading one of the industry’s most active platforms.