Thomas Weisel Partners Hosts Annual Energy Conference

   Thomas Weisel Partners (NASDAQ: TWPG), a global growth-focused investment bank, will host its Annual Energy Conference, June 10 and 11, at the Fairmont Hotel in Montreal. Institutional investors and company management will gather for this one and a half day conference, which will focus on opportunities and challenges in the Energy sector for the remainder of 2010 and beyond.

The conference will showcase presentations from over 30 established and emerging public companies from around the globe, representing energy exploration and production, international oil & gas, oil & gas exploration and production.

"We remain committed to high quality coverage of the Energy sector, and look forward to expanding our Energy effort through the merger with the Stifel Nicolaus Energy team. We remain very positive on the demand outlook for energy, based on a gradual recovery in the US and industrialized economies, combined with accelerating demand in developing global markets," said Keith Gay, Head of TWP's Research Group.

The conference will be led by Thomas Weisel Partners' five senior energy equity research analysts: Dana Benner, CFA, energy equipment & services; David Dudlyke, international oil & gas; Thomas Martin, international oil & gas; Kurt Molnar, oil & gas exploration and production; and Michael Scialla, oil & gas exploration and production. Analysts will offer insight into the major trends impacting their respective sectors.

A full list of company participants includes: Advantage Oil and Gas Ltd. Alange Energy Corp. ARC Energy Trust Bankers Petroleum Ltd. Birchcliff Energy Ltd. Calfrac Well Services Ltd. Canacol Energy Ltd. Celtic Exploration Ltd. Coastal Energy Limited Crescent Point Energy Corp. Crew Energy Ltd. Daylight Energy Ltd. Delphi Energy Corp. Flint Energy Services Ltd. Gran Tierra Energy Ithaca Energy Inc. Kodiak Oil & Gas Corp Pacific Rubiales Energy Corporation Paramount Resources Ltd. Petrolifera Petroleum Ltd. Petrominerales Peyto Energy Trust Range Resources Corporation Savanna Energy Services Corp. Sea Dragon Energy Inc. Trican Well Service Ltd. Trilogy Energy Corp. Tuscany International Drilling Western Energy Services Corp. Xtreme Coil Drilling Inc.

About Thomas Weisel Partners Group, Inc.

Thomas Weisel Partners Group, Inc. is an investment bank, founded in 1998, focused principally on the growth sectors of the economy. Thomas Weisel Partners generates revenues from three principal sources: investment banking, brokerage and asset management. The investment banking group is composed of two disciplines: corporate finance and strategic advisory. The brokerage group provides equity and convertible debt securities sales and trading services to institutional investors, and offers brokerage, advisory and cash management services to high-net-worth individuals and corporate clients. The asset management group consists of: private equity, public equity and distribution management. Thomas Weisel Partners is headquartered in San Francisco with additional offices in Baltimore, Boston, Calgary, Chicago, Dallas, Denver, New York, Portland, Toronto, London and Zurich. For more information, please visit www.tweisel.com.

Additional Information and Where to Find It

In connection with the proposed merger, Stifel Financial Corp. ("Stifel") filed a registration statement on Form S-4 that also constitutes a prospectus of Stifel and other relevant documents relating to the acquisition of Thomas Weisel Partners with the Securities and Exchange Commission (the "SEC") on April 28, 2010. The registration statement on Form S-4 includes a proxy statement of Thomas Weisel Partners which has been mailed to shareholders of Thomas Weisel Partners. Stifel and Thomas Weisel Partners shareholders are urged to read the registration statement and any other relevant documents filed with the SEC, including the proxy statement/prospectus that are a part of the registration statement, because they contain important information about Stifel, Thomas Weisel Partners and the proposed transaction. Investors and security holders will be able to obtain free copies of the registration statement and proxy statement/prospectus, as well as other filed documents containing information about Stifel and Thomas Weisel Partners, without charge, at the SEC's website (http://www.sec.gov). Free copies of Stifel's filings may be obtained by directing a request to Stifel's Investor Relations by telephone to [phone], in writing to Stifel Financial Corp., Attention: Investor Relations, 501 North Broadway, St. Louis, Missouri 63102, by email to [e-mail] or at Stifel's website (http://www.stifel.com). Free copies of Thomas Weisel Partners' filings may be obtained by directing a request to Thomas Weisel Partners' Investor Relations by telephone to 415-364-2500, in writing to Thomas Weisel Partners, Attention: Investor Relations, One Montgomery Street, San Francisco, CA 94104, by email to [e-mail] or at Thomas Weisel Partners' website (http://www.tweisel.com).

Participants in the Solicitation

Stifel, Thomas Weisel Partners and their respective directors and executive officers may be deemed, under SEC rules, to be participants in the solicitation of proxies from the shareholders of Thomas Weisel Partners with respect to the proposed transaction. More detailed information regarding the identity of the potential participants, and their direct or indirect interests, by securities holdings or otherwise, are set forth in the registration statement and proxy statement/prospectus and other materials filed with the SEC on April 28, 2010 in connection with the proposed transaction. Information regarding Stifel's directors and executive officers is also available in Stifel's definitive proxy statement for its 2010 Annual Meeting of Shareholders filed with the SEC on February 26, 2010. Information regarding Thomas Weisel Partners' directors and executive officers is also available in Thomas Weisel Partners' definitive proxy statement for its 2009 Annual Meeting of Shareholders filed with the SEC on April 16, 2009. These documents are available free of charge at the SEC's web site at http://www.sec.gov and from Investor Relations at Thomas Weisel Partners and Stifel.