Lamar Advertising Company
- Owns and operates outdoor advertising and logo structures. (Nasdaq: LAMR).
- http://www.lamar.com/

Primedia Outdoor
- Provides outdoor advertising and marketing services through billboards, spectactulars, facias, ID lites, posters and signs.
- http://www.primeoutdoor.co.za/

Kartik Advertising
- India based advertising agency focused on outdoor campaigns in Indian railway and bus shelters.
- http://www.kartikgroup.com/

AdSmart Outdoor Advertising
- Out-of-home media company specializing in billboards, and auto and fleet ads.
- http://www.adsmartoutdoor.com/

Wilkins Media
- Represents out-of-home media companies to ad agencies and advertisers.
- http://www.wilkins-media.com/