Williams Capital Group | 1,322 followers on LinkedIn. Williams Capital delivers fixed income and equity securities underwriting, sales and trading services for U.S. corporations and institutional investors Equities: The Williams Capital domestic trading desk provides our clients with full service execution for all listed and over-the-counter stocks. We have a diverse client base, from small institutional and hedge fund managers to multi-billion dollar mutual funds, insurance companies and public and private pension funds. Our traders have participated in the stock buy back programs of many top Fortune 500 companies.