"The question becomes now, will there be a domino effect?" For his part, Newmont's CEO Gary Goldberg declined to speculate on future mergers. "We've positioned, or will position, the business to be the go-to gold company. Whether this drives others to take action, I think that's up to each of them to figure out." Here's some companies to keep an eye on: AngloGold: South African gold miner AngloGold Ashanti Ltd. will maintain its position as the third-biggest producer even after the latest deals, but is increasingly dwarfed by its beefed-up rivals.