PKN Orlen S.A.
Petroleum refinery
Organika Sarzyna S.A.
Chemical products manufacurer
Organika Jaworzno S.A.
Chemical products manufacturer
Organika Zachem S.A.
Chemical products manufacturer
Zakłady Azotowe Puławy S.A.
Fertilisers & chemical products manufacturer
Zakłady Azotowe Włocławek S.A. (currently Anwil S.A.)
Fertilisers & chemical products manufacturer
Zakłady Azotowe w Kędzierzynie S.A.
Fertilisers & chemical products manufacturer