B. Riley Securities is an Arlington, Virginia-based investment bank and FINRA-registered broker-dealer focused on middle market investment banking, capital markets, mergers and acquisitions, restructuring, and equity and debt financings. It serves business owners, capital providers, private equity groups, financial sponsors, and institutional investors across the United States, with coverage spanning finance, professional services, TMT, energy, real estate, consumer goods, industrial technology, biotechnology, and related sectors. For fundraising founders, it is most relevant as an investment banking, capital markets, and institutional financing counterparty rather than a conventional venture capital fund.