Cargile Investment Management

William Cargile serves as the principal and primary decision-maker for the office. The firm maintains a lean internal structure, which keeps investment authority concentrated with the principal. External advisors and specialized consultants are engaged selectively for deal-specific diligence.

It operates as a single-family office. The firm manages capital exclusively for the Cargile family and does not accept external limited partners. Its patient capital posture allows for longer hold periods and flexible structuring that multi-investor vehicles cannot typically accommodate.

The office allocates across direct energy investments — including royalties and working interests with a natural gas emphasis — real estate holdings in Texas and the Mountain West, and private equity fund commitments. The private equity sleeve covers middle-market buyout, growth equity, and select venture capital funds, often with an industrial or energy services tilt.

The family's wealth originates from Cargile Oil Company, a Texas-based exploration and production company. The liquidity generated by the oil business established the capital base the office manages today, with the principal retaining direct operational knowledge of the energy sector.

The office does both. It makes direct investments in energy assets and real estate, while also committing to third-party private equity funds for exposure to buyout, growth equity, and venture strategies beyond its direct operating footprint.