Noble Corp., the world’s biggest offshore oil rig contractor by market value, agreed to buy its smaller rival Diamond Offshore Drilling Inc. in a deal valued at $1.6 billion.

Hess Corp. signaled its $53 billion agreement to be bought by Chevron Corp. may be delayed after ExxonMobil filed for arbitration to preserve its rights to a massive oil discovery off Guyana.

Tesla Inc. is planning to expand a battery-research facility in the San Francisco Bay Area.

A federal judge struck down the city of Oakland, Calif.’s ban prohibiting companies from transporting coal through an export terminal that U.S. miners see as a key link to overseas markets.

Dozens of U.S. cities are willing to buy $10 billion of electric cars and trucks to show skeptical automakers there’s demand for low-emission vehicles, just as President Trump seeks to review pollution standards the industry opposes.