W
- Wah Nam International
- Ward Ferry Management
- Watami Trading
- WB Nominees
- WEGA Mining ASA
- Weiss Capital
- Wellington Management Company LLP
- Wellington West Capital Markets Inc.
- Wermuth Asset Management
- West LLB
- Westwind Partners
- Wing Hing International
- Witan Investment Trust PLC
- Witan Pacific Investment Trust PLC
- Wogen Plc
- World Mining Trust plc
- Worship Street Investments
