The biggest investment companies by assets under management and number of clients in 2019.

TD Ameritrade - Largest Brokerage Firm

4.5-star brokerage firm rating

TD Ameritrade (read review) has approximately $1.2 trillion in client assets and over 10 million accounts.

Being a full service brokerage as well as a bank, TD Ameritrade is able to offer the widest range of investment options to satisfy any investor’s needs. TD Ameritrade allows for investing in futures and forex, something that almost no other online brokerage provides.

Stock and ETF trades cost $0 which is a great price for the investor. This large brokerage house offers over 2,000 commission-free mutual funds - enough for any investor to build a portfolio without paying any brokerage fees.

Investors who want the backing and peace of mind of one of the largest financial institutions will find TD Ameritrade a great fit.

  • Stocks & ETFs: $0
  • Options: $0 + $0.65 per contract
  • Mutual Funds: $49.99
Promotion: $0 commission stocks/ETFs + get up to $600 cash.

Open TD Ameritrade Account

Scottrade - Largest Brokerage Firm

4.5-star brokerage firm rating

Scottrade has net capital of $306,308,563. The number of accounts is over 3.1 million.

Scottrade provides all of the perks of a discount online broker, along with the comfort of over 500 local branches for superb assistance and customer service. In fact, Scottrade had been rated by JD Power and Associates the highest in investor satisfaction with self-directed services for two consecutive years.

A wide selection of investments from stocks to municipal bonds and CDs, along with $0 stock trades, makes Scottrade a top option for investors. Mutual fund traders will be especially happy with the selection of no-load funds that have no transaction fee when trading online.

Update: TD Ameritrade have recently acquired, integrated and discontinued Scottrade brand.

  • Stocks & ETFs: $0
  • Options: $0 + $0.65 per contract
  • Mutual Funds: $17
Promotion: $0 commission stocks/ETFs + get up to $600.

Open Scottrade Account

Charles Schwab - Largest Brokerage Firm

Charles Schwab rating

Charles Schwab (read review) has $3.36 trillion in total client assets and more than 9 million clients.

Schwab's base trade price is $0, which is pretty low. Mutual funds commission on funds that are not on the Schwab's select list is $76 - the highest among discount brokers.

A vast selection of investment products, outstanding research, great customer support and in-person guidance are the strongest features of Charles Schwab brokerage.

  • Stocks & ETFs: $0
  • Options: $0 + $0.65 per contract
  • Mutual Funds: $76 to buy, $0 to sell
Promotion: Make $100,000 deposit and get 500 commission-free online equity and options trades.

Open Schwab Account

Fidelity Investments - Largest Brokerage Firm

Fidelity Investments rating

Fidelity Investments (read review) has $2.45 trillion in total assets under management and over 22.1 million accounts (but that number includes Fidelity mutual funds clients).

Fidelity offers advice in wealth management, investment guidance, college savings, charitable giving and provides top-notch educational content for novice and professional investors alike. Fidelity’s base trade price is $0.

Although mutual funds commissions are a bit higher at Fidelity, the massive brokerage offers investors their money’s worth in options, benefits, education, research, customer service and ease-of-use.

  • Stocks & ETFs: $0
  • Options: $0 + $0.65 per contract
  • Mutual Funds: $49.95
Promotion: Get 500 free trades with $100,000+ deposit.

Open Fidelity Account

Etrade - Largest Investing Firm

Etrade brokerage firm rating

Etrade (read review) has over $346 billion in total client assets under management and over 3.5 million accounts.

Etrade charges a flat $0 fee for each stock or ETF trade. The broker has 30 branches in 17 states across the country for personalized help and one-on-one guidance. New customers are invited to attend in-person events in New York, San Francisco, or Chicago.

A lot of tools and education content are available at the broker's website at no cost even for non-customers. When it comes to buying and selling stocks, Etrade is very easy to learn and use.

  • Stocks & ETFs: $0
  • Options: $0 + $0.65 per contract
  • Mutual Funds: $19.99
Open Etrade Account

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Largest Brokerage Firms reviewed by Rating: 4.5