Penson Worldwide, Inc. (PNSN) President to Ring the NASDAQ Stock Market Opening Bell

MEDIA ADVISORY, July 24, 2006 (PRIMEZONE) --

What: Daniel P. Son, President of Penson Worldwide, Inc. (PNSN) will preside over the opening bell to celebrate its recent initial public offering on the NASDAQ. Where: NASDAQ MarketSite - 4 Times Square - 43rd & Broadway - Broadcast Studio When: Tuesday, July 25th, 2006 at 9:30 a.m. EDT Contacts: Andy Yemma Managing Director 212-754-5450 ayemma@intermarket.com Amanda McCutcheon Marketing Specialist 214-765-1368 amccutcheon@penson.com NASDAQ MarketSite: Stephanie Lowenthal; 646.441.5220

Feed Information:

The opening bell is available from 9:20 a.m. to 9:35 a.m. on uplink IA-5 C-band/transponder 14. The downlink frequency is 3980 horizontal; audio: 6.2/6.8. The feed can also be found on Waterfront fiber 1623. If you have any questions, please contact Stephanie Lowenthal at (646) 441-5220.

Photos:

To obtain a hi-resolution photograph of the Market Open, please go to http://www.nasdaq.com/reference/marketsite_events.stm and click on the market open of your choice.

About Penson Worldwide, Inc. (PNSN):

Penson Worldwide, Inc. is the parent company for Penson Financial Services, Inc., Penson Financial Services Canada, Inc., Penson Financial Services, Ltd., Nexa Technologies, Inc. and Penson Financial Futures, Inc., among other companies. The Penson Worldwide group of companies provides execution, clearing, custody, settlement, and technology infrastructure products and services to securities firms and others servicing the securities industry. Penson Financial Services, Inc., headquartered in Dallas, Texas, has served the clearing needs of all types of broker/dealers since 1995. Penson is the flexible choice in global securities services.(tm)

Penson Financial Services, Inc. is a member of the Chicago Stock Exchange, the NASD, Inc., the Chicago Board Options Exchange, OneChicago, the International Securities Exchange, the NYSE Arca Exchange, the Options Clearing Corp, the MSRB, NSCC, ICMA, DTC, Euroclear, SIPC, the Pacific Exchange and is a participant of the Boston Options Exchange (BOX). Penson Financial Services Canada, Inc. is a participating organization with the Toronto Stock Exchange, the Montreal Exchange, the TSX Venture Exchange, is regulated by the Investment Dealers Association of Canada, and is a member of the CIPF. Penson Financial Services, Ltd. is a member of the London Stock Exchange and is authorized and regulated by the Financial Services Authority. Penson Financial Futures, Inc. is a Futures Commission Merchant member of the National Futures Association.

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