What Makes H.I.G. Capital’s Founder Different From Most Private Equity CEOs

Here’s something worth noticing about Sami Mnaymneh: He co-founded H.I.G. Capital in 1993, and 30-plus years later, he still signs off on every deal the firm makes. Not delegates the final call. Not reviews a memo afterward. Personally approves every capital commitment — at a firm now managing $70 billion across seven investment strategies.

That’s genuinely unusual. At most firms this size, founders have long since transitioned into figurehead roles, leaving deal approval to investment committees and sector heads. Mnaymneh hasn’t made that transition, and by most accounts, hasn’t wanted to.

H.I.G. has structured itself around that centralized accountability. The firm’s 500-plus investment professionals operate across 19 offices worldwide, but the decision-making framework flows back to Miami. Whether that’s a governance strength or a concentration risk is a fair debate. What’s hard to argue with is the track record.

The Resume Behind Sami Mnaymneh’s Investment Philosophy

Understanding how Mnaymneh thinks about investing requires understanding where he came from. He didn’t start in private equity — he started in law and banking. He graduated first in his class at Columbia University with a B.A. summa cum laude, then earned both a Harvard Law J.D. and a Harvard Business School M.B.A., each with honors.

Those credentials aren’t just résumé decoration. They shaped a way of approaching deals that is unusually attentive to contractual structure, downside protection, and credit risk — the kind of rigor that tends to matter most when a portfolio company runs into trouble. After early positions at Morgan Stanley and The Blackstone Group, Mnaymneh brought those skills to H.I.G. and made them the firm’s intellectual foundation.

The credit business is probably the clearest expression of that philosophy. WhiteHorse, H.I.G.’s direct lending affiliate, focuses narrowly on senior secured loans to U.S. middle market companies — bespoke terms, conservative loan-to-value ratios, and borrowers with EBITDA generally between $30 million and $100 million. McDermott Will & Emery represented H.I.G. WhiteHorse in the close of Fund IV, which came in at $5.9 billion — a fund size that signals serious institutional confidence in the strategy.

Why the Middle Market Still Works as a Focus

Private equity firms tend to move upmarket as they grow. Larger funds need larger deals to put money to work efficiently, and that gravitational pull is hard to resist. H.I.G. has resisted it longer than most — partly by design, partly because Mnaymneh has consistently argued that the middle market offers something the large-cap world doesn’t: genuine information asymmetry.

Mid-sized companies get less analyst coverage, attract fewer competing buyers, and often have ownership or management situations that create real entry opportunities for patient capital. H.I.G.’s middle market LBO fund strategy has pursued exactly those situations across more than 400 completed investments.

The firm’s newest direction — a $1.5 billion vehicle targeting GP-led continuation funds — is a natural extension of that same logic. H.I.G. already has relationships with more than 800 private equity managers, many of them middle market-focused. Backing their continuation vehicles means applying the same analytical approach to a new deal type rather than fundamentally changing what the firm does.

Mnaymneh’s profile in Miami has grown alongside the firm. He has served on the boards of Columbia College and the Harvard Law Dean’s Council, and appears regularly on rankings of Miami’s most prominent billionaires — a city that has become a more serious financial hub partly because firms like H.I.G. chose to headquarter there.