S45

S45 is building an AI-native financial institution, starting with investment banking for the global mid-market. We partner with founder-led and mid-market companies as they access capital, prepare for public markets, explore M&A, and execute strategic transactions. Our work combines deep transaction experience with AI-native systems across research, diligence, documentation, valuation, investor mapping, distribution, and execution. This allows us to bring greater speed, structure, and precision to complex financial workflows while keeping human judgment, relationships, trust, and accountability at the center. We help companies identify and execute the right capital path, whether that is IPO, pre-IPO capital, M&A, strategic capital, or structured capital. S45 is built for the next era of financial services: institutions that combine intelligence, execution depth, and trusted advisory to help ambitious companies move through critical moments with confidence.