Bentley Associates | 3,321 followers on LinkedIn. Senior-level investment bankers working for middle-market companies. | Bentley Associates L.P. is comprised of Managing Director investment bankers providing a full array of services to middle market and growth companies. Founded in 1990, our senior level investment bankers joined Bentley over the years from major Wall Street firms and boutique investment banks. With two dozen senior level investment bankers, Bentley has assembled the “critical mass” of experienced professionals to meet the needs of our clients.