HamptonRock, a leading boutique investment bank and advisory firm specializing in investment banking, transaction advisory and CFO services, has expanded its Texas presence by opening an office in Houston.  The firm will occupy its new premises at 600 Main at Texas in the Spring, and was represented in its lease negotiations by Anthony Fritsche with Fritsche Anderson Realty Partners.  Fritsche Anderson is a Houston-based commercial real estate firm specializing in the representation of office and industrial space occupiers in Houston and across the United States.