- Þróunar- og símenntunarsjóður S
549300XNM460ICVP0B73Reykjavík
- Þróun og ráðgjöf ehf
54930015DCB3W66AA731Hafnarfjörður
- Þruma RE ehf.
6367008XTYUGBB96XS35ReykjavíkLapsed - not renewed
- Þ.S. Verktakar ehf.
64883FO279OO8QC65J18EgilsstaðirLapsed - not renewed
- Þungeind ehf.
6488VB00JYSQ93M79950Reykjavík
- Þursaborgir ehf.
636700RCFG3678TWOJ50Reykjavík
- Þverdalur ehf.
9845000FDED82FEEDF49Kópavogur
- Þvottavík ehf.
254900EYVLB4S4I6PJ05Seltjarnarnes
- Þykkvabæjar ehf.
636700LMBUK5AZUU4N05Hella
- Þyrluflug ehf
549300KISALXXXYFWJ89Garðabæ
