- Whall Group
- Whall Group
- White Investigative Svc
- Whitley Security & Investigtns
- Whitney Investigations
- Wilkins Security & Patrol Inc
- William A Harry
- William H Dalton Investigators
- William H Dalton Investigators
- William H Dalton Investigators
- William Mathis Investigator
- William Rudman Assoc
- William Rudman Assoc Inc
- William T Murphy Investigation
- Williams Investigations
- Wizard Investigations
- Woods Security
- World Investigative Svc
- World Investigators Network
- World Wide Investigations
- World Wide Investigations
- World Wide Probe Inc
- Wyant Investigations
- Wysocki & Assoc
- Yale Associates Inc
- Youngbear Investigations
- Zane Investigations
