. Investment banks help companies in this sector by offering services like Mergers and Acquisition advisory , Capital Raising , Restructuring and Advisory , Industry Research and Analysis , Private Equity and Venture Capital , IPO and SPAC Transactions , Sustainability and Green Financing , etc . Investment banks help companies in this sector by offering services like Mergers and Acquisition advisory , Capital Raising , Restructuring and Advisory , Industry Research and Analysis , Private Equity and Venture Capital , IPO and SPAC Transactions , Sustainability and Green Financing , etc