Arq Securities LLC | 74 followers on LinkedIn. We a boutique brokerage firm offering advisory, investment banking, capital raising, and securities trading | Arq Advisors is a boutique brokerage firm offering advisory, investment banking, capital raising, and securities trading services to our clients. We serve a wide range of clients seeking advice and assistance with their strategic needs and maximizing value in the capital markets. Our diverse team of placement agents, investment bankers, and trading professionals possess deep expertise across multiple asset classes including hedge funds, private equity, real estate and secondary markets.