The Gillette product line of razors and personal care products became part of Procter & Gamble when P&G bought the company in 2005. Razors are one of the most profitable businesses for P&G. The company's razors are used by 750 million men in more than 200 million countries, according to Euromonitor. But online sellers like Dollar Shave Club have dinged Gillette in the U.S. Market share is down significantly over the past decade from 70% in 2010 to below 50% in 2017, per Euromonitor.

Source: Forbes