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Ziegler Chemical is one of the leading companies in the Energy and Utilities sector.
Accents Con Agua is a Dallas, TX-based company in the Energy and Utilities sector.
Endeavour International Corporation is one of the leading companies in the Energy & Utilities sector.
Berexco is a Wichita, KS-based company in the Energy and Utilities sector.
Petróleo Brasileiro S.A. é uma empresa de capital aberto, cujo acionista majoritário é o Governo do Brasil, sendo, portanto, uma empresa estatal de economia mista.