Firma Z - Skien
- Zensi AS
- Zerodynamix AS
- Zorba ANS
- Zala AS
- Zoma AS
- Zoologen AS
- Zoologen AS
- Zavanna Lietorvet
- Z Elektro AS
- Z Nett AS
- Zubir Lazerguy
- Zinkes Mote AS
- Zavanna Herkules
- Zizzi Skien
- Zones AS - Grenland
- Zetterstrøm Fred
- Z-Ark AS
- Zuraris Holding AS
- Zuraris Eiendom AS
- Z Elektro AS
- Zarplata Ryen
- Zcsb Zoghlami
- Zafran Holding AS
- Zena - Alexandra Tveit
- Zbigniew Tadeusz Pycia
- Zuraris E Malerservice AS
- Zenith Solsenter Skien AS
- Zettel Engineering Technologies
- Zimmermannfoto Lucas Zimmermann
- Z L Hus
- Zekhnini Maling og Tapetseringsfirma AS
- Zekhnini Maling og Tapetseringsfirma
- Zalmay Rahimi Afghansk Skredder
- Z Invest & Eiendom AS
- Zerotaxi Kristian Henrik Svindal
- Zensi Westlund Steffen Westlund Langerød
- Zimmermann Maskin, Hus og Hage
- Z Vanity V/ Lobben-Seth
- Zoo Miljø Engros Vidar Andersen
- Zbych Rehabilitering Zbigniew Zbigniew Edward Blaszczyk