Bedrift W - Porsgrunn
- Wera AS
- Wimp AS
- Webrodent AS
- Wald AS
- Westernbutikken AS
- Waterstop AS
- Walnum
- Woxen A/S
- Webteknologi AS
- Wolter Media
- Winje Agency AS
- Wolter Invest AS
- Wergeland - Kurs
- Westli Consulting AS
- Waahlberg Handel
- Westby Consult
- Wimp Eiendom AS
- Wimp Invest AS
- Wave Av AS
- Wergeland Grafisk AS
- Weitkamp Servicetjenester
- Wetherill Marine
- Wagenius Music
- Woxen Pusseropp
- Wennberg Anlegg
- Wirgenes Holding AS
- Western Choice AS
- Wenche Rånman Nornes
- Wroldsen AS Alf S
- Wright Trafikkskole AS Porsgrunn
- Westerlin Creative Studio
- Wiiliams Fitness.Com
- Weber Leca Porsgrunn
- Wellalage Don Lege
- Wild Horses V/Gulbrandsen
- Wahlstrøm Regnskap og Rådgivning AS
- W&W International Wenche Wennerød
- Wilhelmsen Port Services Norway AS
- With Love By Solveig
- Wood Group Norway AS Avd Herøya
- Willy Bamles Bilverksted AS (Sjekkpunkt)
- Wild And Pretty Floral Design ved Linda Sorensen