PTC S.A. (currently T-mobile)
Telecommunication operator
Polkomtel S.A.
Telecommunication operator
WSiP S.A.
Publisher of textbooks & education materials
Time Warner Inc.
Media Tentertainment
Phonesat Sp. z o.o.
Telecommunications operator
RST El-net S.A. (currently Netia)
Telecommunication infrastructure operator
Exatel S.A.
Telecommunication operator
HAWE S.A.
Operator of fibre-optic infrastructure
Bellona S.A.
Book publisher
Master Film Ltd
Sound & subtitles studios