(Pexels)
Of all the companies I've research, AutoZone (AZO) is among the most stable. The auto parts company has nearly constant margins, constant leverage, and almost always trades at the same valuation. This has made it very attractive to many investors, particularly with its slow but steady revenue growth over the past two decades. Best of all, AutoZone's growth has been fueled by reinvesting its profits into new business at an extremely strong return on invested capital, meaning it has not needed to rely on leverage expansion or shareholder dilution to