Sandler O'Neill + Partners is where banks can go to do their banking. The boutique investment bank focuses on the financial services sector, offering a wide range of services, such as mergers and acquisitions advisory, IPO underwriting, balance sheet management, consulting, and capital raising. It also handles the demutualization process for insurance companies and thrifts. Sandler O'Neill provides its clients with research, trading, and sales services for bonds and securities of financial services firms. The management-owned firm was founded in 1988.