Bedrift I - Porsgrunn
- Illuminor as
- Investeringsgeorg AS
- Ibsensykehusene AS
- Isofag AS
- Inflowcontrol AS
- Isaksen AS
- Ibenor AS
- Innovator AS
- Ibeco AS
- Industriuka AS
- Illeris AS
- Industrisveis AS
- Inger
- Innredningshjelpen AS
- Isola AS
- Iulian Demciuc
- Iogt Grenland
- Iselinm Meyer
- Invest-Lia AS
- Ifront Consulting AS
- Ifront Consulting AS
- Iaat Holding AS
- Iryna Liaskevych
- Invest Tech AS
- Idiom Oslo AS
- Industry Service AS
- Ingunn Eide
- If Skadeforsikring
- Ingrid Stendal
- Ilenlia Borettslag
- Ilenlia Borettslag
- Ibsen Sykehuset AS
- Insert Coins AS
- Ibrahim Hasan
- Ibsen Sykehuset
- Idrettsforeningen Pors
- Ikeso Consulting DA
- Ikeso Eiendom DA
- Ingeniør Hvidsten
- Invest Telemark AS
- Industri Fokus AS
- Ivanov Renhold
- Isaksen Automasjon AS
- Isaksen Storgaten AS
- Isaksen Mercantile
- Ingwe Holding AS
- Isaksen Eiendom AS
- Inger Petersen
- Itb Holding AS
- Isaksen Båtservice
- Isdahl Engineering
- Ivar Kåsastul
- Industriinkubatoren Proventia AS
- Iryna Dzezhyk
- Irina Zherebnaya
- Iryna Bilousova
- Ikar Pshybysh
- Ihor Rymyk
- Iryna Benovska
- Iform Porsgrunn AS
- Ihor Tarnavskyi
- Iryna Hnucha
- Inna Mikhova
- Iryna Hoholeva
- Inna Maievska
- Ihor Tarabanov
- Innowell Solutions AS
- Inline-Test AS
- IBKA Norge AS
- Iveti Oppdrag AS
- Inna Potapchuk
- Ingvild Dolve
- Impact Studio AS
- Idrettslaget Hei
- Ingeniør Larsen
- Isola Hytteforening
- Isola Holding AS
- Il Hauken
- Il Hauken
- I-Labs AS
- Ivar Gundersen
- Ingunn Oxum
- Inter Fish DA
- Isaksen Transport
- Ingeniør Five AS
- Ibrahim Mahad Abdi
- IF Urædd Allianseidrettslag
- IF Urædd Allianseidrettslag
- Inger-Marie Myrvoll
- Ingrid Elisabeth Kåss
- Ida Dorthea Horpestad
- Illustratør Anne Hvål
- In Line Frisør AS
- Inger Lise Rasmussen
- Inger Lise Rasmussen
- Ingrid Borchgrevink Lund
- Ingeborgs Hage Borettslag
- Ingeborgs Hage Borettslag
- Ishusveien 35 AS Konkursbo
- Ishusveien 35 AS Konkursbo
- Ingunn Nordbø Boge
- Igland Garasjen AS Avd Grenland
- Immanuel Baptist Church
- ISS Management AS Avd Porsgrunn
- IF Pensjonistforening Avd Telemark
- Inger Marie Trovi
- Interiør Møbelforretning AS (Bohus)
- IKEA Bestillingspunkt Porsgrunn
- I3 Computer Consulting DA
- Iryna Isaksen Educentre
- Input i Samlivet
- Input i Samlivet
- Ingeborg Smeby Vidsjå
- Isnes Kai B
- Ishak Rodney Jamal
- International School Telemark
- Industrienergi Equinor Telemark
- Invent-Invest Schwaiger
- Iktyoseforeningen i Norge
- Industriveien 2 Porsgrunn AS
- Ing. Vidar Tjervåg
- In Consult AS Tvangsavviklingsbo
- In Consult AS Tvangsavviklingsbo
- Industri & Sikkerhetsskolen AS
- Industri & Sikkerhetsskolen AS
- Industri- & Sikkerhetsskolen AS
- Isola Kjemiske Fagforening
- Ingeniør Torbjørn Jacobsen
- Ibsensykehus Porsgrunn, Volker Moritz
- Ib-Klasse til Roma
- Ib-Klasse til Roma
- Immer Consulting Robert Immerstein
- Italiaamore Travels Gina Hardy
- Indian Cultural Association Telemark
- Indian Cultural Association Telemark
- Ingeniørfirma Gullik E Bråthen AS
- Ingeniørfirma Gullik E Bråthen AS
- Isaksen Coaching og Konsult
- Innovasjon Norge Vestfold og Telemark
- ISS Facility Services AS Avd Catering Porsgrunn
- ISS Service Management AS Avd Renhold Porsgrunn
- ISS Facility Services AS Avd Renhold Porsgrunn
- Icon Media V/ Ulrik Skare
- Industri Energi Wafer Herøya Avd. 429
- Inovyn Norge AS Avd Pvc Fabrikk Porsgrunn
- International Christian Zionist Center Norway
- Inst. Per Øverland (El-Proffen)
- Idrettens Hus Telemark B.i.L
- Ild og Bønner Kaffebrenneri Joel Simpson
- ISS Facility Services AS Avd 416017 Skagerak Energi Porsgrun
- International Students Union At Telemark University College
- Institutt for Mekanisk Diagnostikk og Terapi Norge AS
- Industri & Energi T-S Group Avd 0322
- Ibanez Kultur & Trening Dos Santos Santana