Coca-Cola is the top American employer for the best career mobility out of nearly 400 big employers, according to 'American Opportunity Index', a five-year analysis of 4.7 million workers. It is followed by food company JM Smucker, industrial supply company WW Grainger, PNC Financial Services, software company ServiceNow, Meta Platforms, Capital One Financial, Bank of America, Costco and Intuit.