Ameritrade Reports Monthly Metrics.

OMAHA, Neb. -- Ameritrade Holding Corporation (NASDAQ:AMTD) today reported 133,000 average client trades per day in May 2005. As of May 27, 2005, qualified accounts(1) totaled 1,734,000. The Company opened 17,000 new accounts and closed 13,000 accounts during May resulting in an aggregate of 3,684,000 total accounts.(2)

Margin Balances and Client Assets

The Company reported average client margin balances in May of approximately $3.4 billion. On May 27, 2005, client margin balances totaled approximately $3.3 billion and client assets totaled approximately $77.3 billion, of which cash and money market assets totaled $13.2 billion.

About Ameritrade Holding Corporation

For 30 years, Ameritrade Holding Corporation has provided investment services to self-directed individuals through its brokerage subsidiaries. Ameritrade develops and provides innovative products and services tailored to meet the varying investing and portfolio management needs of individual investors and institutional distribution partners. A brokerage industry leader, Ameritrade, Inc.,(3) a subsidiary of Ameritrade Holding Corporation, recently received a four-star rating in the Barron's 2005 Review of Online Brokers for its Apex active trader program. For more information, please visit www.amtd.com.

(1) Qualified accounts include all open client accounts with a total liquidation value greater than or equal to $2,000, except clearing accounts.

(2) Total accounts include all open client accounts (funded and unfunded), except clearing accounts.

(3) Ameritrade, Inc., member NASD/SIPC