A new Constellation sign is placed on the side of 750 E. Pratt St. Thursday. The company was acquired earlier this year by Exelon Corp. Expand to read more Exelon Corp. is starting to show its ...

Petrobras (PBR) signs rig extension contracts with Constellation Oil Services, securing continued operations for two important rigs in its offshore drilling fleet.

Offshore driller Constellation Oil Services Holding SA is planning to list shares in Oslo after reducing debt and increasing revenue from contracts with Brazilian oil explorer Petrobras.

Petrobras PBR, the Brazilian state-owned energy company, has announced the extension of its existing contracts for two offshore drilling rigs owned by Constellation Oil Services.

Petrobras PBR, the Brazilian state-owned energy company, has announced the extension of its existing contracts for two offshore drilling rigs owned by Constellation Oil Services. This news coincides ...