Nassau Street Partners | 25,386 followers on LinkedIn. Boutique Investment Banking | Nassau Street Partners is a premier strategic advisory firm focused on delivering tailored financial solutions for businesses. With over $1 billion in aggregate transaction volume, 75 years of combined capital markets experience, and investor relationships, Nassau Street Partners is committed to helping businesses achieve long-term success through strategic advisory services and capital raising expertise. Our focus spans across a wide range of specialized services, including capital raising (equity and debt), bridge financing, mezzanine financing, follow-on offerings, private placements and valuations.