The Biggest Stock Brokerage Firms in the US

There are dozens of stock brokerage houses in the United States. But four major firms stand out because of their name, offerings, their total amount of client assets, and the number of clients they serve. They are often referred to as the "big four brokerages." Each of these firms—Charles Schwab, Fidelity Investments, E*TRADE, and TD Ameritrade—comprise the top in terms of customers and assets.

This short article analyzes the products, services, and fee structure of each brokerage. They are listed in no particular order.

Key Takeaways

  • Charles Schwab is a leading U.S. stock brokerage firm with $7.5 trillion under management and 33 million active brokerage accounts.
  • Fidelity Investments has $3.9 trillion in discretionary assets, 40 million active brokerage accounts, and is a good choice for customers who want to invest in Fidelity ETFs and mutual funds.
  • E*TRADE is an online brokerage pioneer, well-known for its full-featured mobile apps, top-notch options trading tools, and customizable user experience.
  • Because of its extensive research and investor education tools aimed at all levels of investing expertise, TD Ameritrade is a top choice for active and new investors alike.

Charles Schwab

  • Assets under management: $7.48 trillion.
  • Number of accounts: 33.9 million.

Charles Schwab was founded in 1971 and is based in San Francisco. It is one of the leading investment brokerages and IRA custodian firms in the U.S.

As of Jan. 2023, Charles Schwab held $7.5 trillion in client assets, with a total of 33.9 million active brokerage accounts. It also operates Schwab Bank, one of the largest banks in the United States, which allows its brokerage clients to link their trading accounts with a checking account. The company boasted 1.7 million active banking accounts.

The firm offers clients a variety of investment products including stocks, mutual funds, exchange-traded funds (ETFs), money market funds, fixed-income products, options, futures, insurance, and annuities. Clients can invest in both Schwab's proprietary products and other third-party investments.

Charles Schwab's Fee Structure

Schwab, the country's first real discount brokerage, has consistently been rated one of the cheapest brokerage firms in the United States. Effective Oct. 2019, Schwab cut commissions from $4.95 to $0.00 for all U.S.- and Canadian-listed stocks, ETFs, options online, and mobile trades. Options trades still have the standard $0.65 per-contract fee.

The operating expense ratio (OER) fees for actively managed mutual funds can range from 0.21% to 1.92%. Fees for passively managed mutual funds can range from 0.02% to 0.39%. Annual portfolio management fees at Schwab start at 0.80% for the Schwab Private Client account. These fees decrease for clients with higher asset levels.

The firm also offers clients a worry-free, passive approach to investing through its robo-advisor service called Intelligent Portfolios. The online platform provides clients with an automated experience, giving them access to a series of ETFs that rebalances per the client's investment goals. The service requires a minimum $5,000 investment and comes with no advisory or commission fees.

In 2019, Charles Schwab announced the acquisition of TD Ameritrade in a stock transaction valued at approximately $26 billion. TD Ameritrade clients will see their accounts migrated to Schwab by the end of 2023.

Fidelity Investments

  • Assets under management: $3.9 trillion
  • Number of individual investors: 40.9 million.

Fidelity Investments is the nation's largest keeper of 401(k) retirement savings plans. Founded in 1946 as Fidelity Management & Research, the company is based in Boston.

According to the company's website, Fidelity had $11.1 trillion in customer assets as of June 2021, with an active 82.8 million brokerage accounts. The company also boasted 40 million individual investors and more than 2.6 million commissionable trades per day.

Fidelity is the best choice for brokerage clients who also want to invest in Fidelity ETFs and mutual funds. The firm also offers investments in third-party products.

Fidelity Investments' Fee Structure

Fidelity touts its zero account fees and no minimums to open a retail brokerage account, including IRAs. Following Schwab's lead, Fidelity also offers commission-free stock, ETF, and options trades. Options trades still have the standard $0.65 per-contract fee.

There are no minimums to invest in Fidelity mutual funds. Fidelity does not charge an expense ratio fee for certain proprietary mutual funds and offers hundreds of other funds with no transaction fees.

Portfolio advisory service fees range from 0.50% to 1.50% based on the amount invested. Minimum investments range from $25,000 to $250,000 based on the investment options. For its automated Fidelity Go service, the firm charges a 0.35% advisory fee but requires no account minimum to open an account.

Through its mutual funds and other advisory services, Fidelity has tens of millions of non-brokerage customers, something the others cannot claim.


  • Assets under management: $360 billion.
  • Number of accounts: 5.2 million.

Founded in 1982, E*TRADE began as a holding company and has transformed into a leading online discount brokerage service. The company was hit hard during the 2007-2008 financial crisis because of high exposure to subprime mortgage portfolios. Its stock dropped 86.7% in 2007 before the company implemented a comprehensive turnaround plan.

The turnaround worked and E*TRADE has become a leading financial firm for its mobile accessibility, online trading tools, and customizable user experience. As of Feb. 2020, E*TRADE had more than 5.2 million retail brokerage accounts with more than $360 billion in client assets.

Just like the other top brokers, E*TRADE offers clients access to ETFs, mutual funds, stocks, options and fixed income products. The firm also offers two checking accounts and a savings account with $1.25 million in FDIC insurance. Clients can also choose a prebuilt portfolio, which gives them a diversified portfolio of mutual funds or ETFs built by an investment strategy team.

E*TRADE's Fee Structure

In 2019, E*TRADE joined Schwab and Fidelity in offering no-fee trading. E*TRADE cut commissions on stock, options and ETF trades to $0 each, while options contracts are charged $0.65 each ($0.50 with 30+ trades per quarter).

On Feb. 20, 2020, investment banking firm Morgan Stanley announced it would acquire E*TRADE in an all-stock transaction valued at approximately $13 billion. The acquisition closed in October of 2020.

TD Ameritrade

  • Assets under management: $1 trillion.
  • Number of client accounts: 11 million.

TD Ameritrade was founded in 1971 and is headquartered in Omaha, Nebraska. The firm became TD Ameritrade after the old Ameritrade acquired TD Waterhouse Group in 2006. It acquired St. Louis-based rival Scottrade in 2017. Client accounts were fully merged and integrated into the TD Ameritrade system by February 2018.

TD Ameritrade is considered one of the top brokerage firms in the U.S. because of its value and quality of service. The firm provides clients with a 24/7 customer support system, a user-friendly website with mobile access, research and advanced trading tools. The firm is considered a top broker for beginning investors.

According to the company website, TD Ameritrade has more than $1 trillion in customer assets. Furthermore, it boasts more than 11 million client accounts, with clients placing an average of 500,000 trades per day.

Investment products range from stocks, ETFs, mutual funds, options and fixed-income investments. Clients can also choose to invest in futures and forex currency.

TD Ameritrade's Fee Structure

TD Ameritrade does not require an account minimum, charges no platform fees and requires no trade minimums. TD Ameritrade offers commission-free trading, charging no commissions on online trading of U.S. exchange-listed stocks, ETFs and options. A $0.65 per contract fee applies for options trades. 

Top Brokerage Houses, Ranked

Based on this information, the largest brokerages in the United States are as follows:

Top Brokerage Firms by AUM and Number of Accounts
Rank  Firm AUM Customer Accounts 
1  Charles Schwab $7.5 trillion   33.9 million
2  Fidelity Investments  $3.9 trillion. 40.9 million
4 TD Ameritrade $1 trillion 11 million
3  E*Trade  $360 billion 5.2 million 

What Is a Brokerage Account Used for?

A brokerage account is used to buy stocks, bonds, shares of a mutual fund or index fund, and other securities.

What Is the Best Brokerage Account?

While it is impossible to recommend any one brokerage, the most popular brokerage providers are Charles Schwab, Fidelity Investments, and TD Ameritrade. These companies provide brokerage services to millions of clients.

What Is a Self-directed Brokerage Account?

A self-directed brokerage account is one where the client has complete control over their assets, and can invest in any asset they wish. This is different from an employer-sponsored retirement account, where the number of possible investments is more constrained.

The Bottom Line

While there are many brokerage houses in the United States, the largest are companies like Charles Schwab and Fidelity. These are huge asset managers with millions of customers investing assets worth hundreds of billions of dollars. Before investing, it is important to understand the potential fee structure and the risk of loss.

Article Sources
Investopedia requires writers to use primary sources to support their work. These include white papers, government data, original reporting, and interviews with industry experts. We also reference original research from other reputable publishers where appropriate. You can learn more about the standards we follow in producing accurate, unbiased content in our editorial policy.
  1. Charles Schwab. "2019 Annual Report," Part 1, Page 1.

  2. Fidelity. "We are Fidelity."

  3. Charles Schwab. "Schwab Reports Monthly Activity Highlights."

  4. Charles Schwab Corporation. "Charles Schwab.'

  5. Charles Schwab. "Investment Products."

  6. Charles Schwab. "In Conjunction With Chuck Schwab’s New Book 'Invested,' Schwab Removes the Final Pricing Barrier to Investing Online by Eliminating U.S. Stock, ETF and Options Commissions."

  7. Charles Schwab. "Costs of Investing."

  8. Charles Schwab. "Schwab Private Client."

  9. Charles Schwab. "Schwab Intelligent Portfolios."

  10. "Your TD Ameritrade Account Is About to Vanish—Here's What to Do Now."

  11. Fidelity. "Our Company."

  12. Fidelity. "Fidelity Works."

  13. Fidelity. "Investment Choices."

  14. Fidelity. "Commissions, Margin Rates, and Fees."

  15. Fidelity. "Mutual Fund Investing Ideas."

  16. Fidelity. "Personalized Investment Management."

  17. Fidelity. "Fidelity Go."

  18. Fidelity. "2020 Fidelity Investments Q2 Highlights," Page 1.

  19. "Here's Why Morgan Stanley is Spending $13 Billion to Buy E*Trade."

  20. E*TRADE. "About Us."

  21. E*TRADE. "E*TRADE Financial Addresses the Potential Impact of Recent Downgrades of Asset-Backed Securities."

  22. E*TRADE. "E*TRADE Financial Corporation Reports Initial Progress of Turnaround Plan," Pages 1-2.

  23. Morgan Stanley. "Morgan Stanley to Acquire E*TRADE, Creating a Leader in all Major Wealth Management Channels."

  24. E*TRADE. "Investment Choices."

  25. E*TRADE. "E*TRADE Bank."

  26. E*TRADE. "Prebuilt Portfolios."

  27. E*TRADE. "#1 Digital Broker E*TRADE Announces $0 Base Rate Commissions for Online Stock, ETF, and Options Trades."

  28. E*TRADE. "Pricing and Rates."

  29. Morgan Stanley. "Morgan Stanley Closes Acquisition of E*Trade."

  30. TD Ameritrade. "About Us."

  31. TD Ameritrade. "2018 Annual Report," pages 3 and 23.

  32. TD Ameritrade. "TD Ameritrade Launches."

  33. TD Ameritrade. "2018 Annual Report," Pages i, 4.

  34. TD Ameritrade. "Contact Us."

  35. TD Ameritrade. "About Us."

  36. TD Ameritrade. "Investment Products."

  37. TD Ameritrade. "FAQs: Opening."

  38. TD Ameritrade. "Pricing."

Take the Next Step to Invest
The offers that appear in this table are from partnerships from which Investopedia receives compensation. This compensation may impact how and where listings appear. Investopedia does not include all offers available in the marketplace.
Take the Next Step to Invest
The offers that appear in this table are from partnerships from which Investopedia receives compensation. This compensation may impact how and where listings appear. Investopedia does not include all offers available in the marketplace.