The Biggest Stock Brokerage Firms in the U.S. FACEBOOK TWITTER LINKEDIN By Sean Ross. Updated Mar 11, 2019. There are dozens of stock brokerage houses in the United States. But four major stand List of Stock Brokerage Firms (Discount Online Trading Companies) for 2020 Below is the list of online brokers doing business in the United States. Their names are ordered alphabetically. The table contains brokerage name, firms' website links, commissions on stock and ETF trades, and minimum amounts required to open a new brokerage account. Angel Broking is a leading stock broking company in Mumbai, that offers online platform for trading stocks, equities, derivatives, and other financial instruments that are exchange-traded. We are among one of the leading online stock broking firms in India, established in 1987 and a member of NSE, BSE, NCDEX, and MCX – all the leading stock