It has been about a month since the last earnings report for Waste Management (WM). Shares have lost about 6.4% in that time frame, underperforming the S&P 500. But investors have to be wondering, ...

Waste Management's fourth-quarter revenue grew 13% year over year to $5.9 billion and adjusted EBITDA margin narrowed 100 basis points to 28.9%. Much of the sales growth and margin dilution came from ...