SEC-Required Report on Routing of Customer Orders

For the Quarter Ended March 31, 2008

Driehaus Securities LLC ("DS LLC" or the "Firm") has prepared this report pursuant to SEC Rule 606 (formerly known as Rule 11Ac1-6), which requires all broker-dealers to make publicly available quarterly reports on their order routing practices. The report provides information on the routing of "non-directed orders" – any order that the customer has not specifically instructed to be routed to a particular venue for execution. For these non-directed orders, DS LLC has selected the execution venue on behalf of its customers.

The report is divided into four sections: one for securities listed on the New York Stock Exchange and reported as a Network A eligible security; one for securities listed on The Nasdaq Stock Market; one for securities listed on the American Stock Exchange or regional exchanges and reported as a Network B eligible security; and one for exchange-listed options. For each section, this report identifies the venues most often selected by DS LLC, sets forth the percentage of various types of orders routed to the venues, and discusses the material aspects of DS LLC’s relationship with the venues, if any.

SEC-Required Report on Routing of Customer Orders

for the quarter ended March 31, 2008

Download a complete copy of this report in Adobe Acrobat format (PDF)