Senior Additions to Trading Platform and Medical Device Analyst for
Research Group

SAN FRANCISCO, CA--(Marketwire - June 05, 2008) - Thomas Weisel
Partners Group, Inc. (NASDAQ: TWPG) (TSX: TWP), a growth sector
focused investment bank, announced the hiring of Jon Fredericks as a
Managing Director on the Canadian trading desk, Chris Richards as a
Managing Director on the New York trading desk and Raj Denhoy as a
Director in the Research department who will lead coverage in the
Medical Devices sector.

Mr. Fredericks has over nine years of experience in the securities
industry and most recently was focused on the Canadian Energy sector
at Merrill Lynch. Based in Toronto, Mr. Fredericks will be
responsible for building out TWP's trading franchise in the energy
sector. He will help expand and integrate the company's growing
trading capabilities to offer a more diversified product offering to
TWP's institutional investor client base in the U.S. and Canada. Mr.
Fredericks is joined by Managing Director, Chris Richards, who has
over ten years of experience as a senior block trader. Formerly with
Banc of America Securities, Mr. Richards will trade U.S. financial
and industrial stocks.

"Our clients will experience a significantly enhanced trading product
that further leverages the best execution and cross border
opportunities that result from our recent acquisition of Westwind
Partners," said Tony Stais, Head of TWP's Trading Department.

With the addition of Raj Denhoy, Thomas Weisel Partners' research
coverage of the Healthcare sector has now grown to seven
professionals covering over 90 companies. Mr. Denhoy will be based in
New York and has over eight years of industry experience. Mr. Denhoy
is widely recognized by the investment community for his expertise in
medical technology including orthopedics, cardiology, diagnostics and
ophthalmology. Before joining Thomas Weisel Partners, Mr. Denhoy held
senior research positions at Bear Stearns, Piper Jaffray and JP
Morgan.

"Given the strong growth opportunities in the medical device sector,
it was important to add an analyst of Raj Denhoy's caliber to the
team to provide our clients with independent research analysis of the
industry," said Keith Gay, Head of TWP's Research group.

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 Group, Inc. generates revenues from three
principal sources: investment banking, brokerage and asset
management. The investment banking group is comprised 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, Cleveland, Denver,
New York, Portland, Silicon Valley, Toronto, London, Mumbai and
Zurich. For more information, please visit www.tweisel.com.


Investor Relations Contact:
Deborah Lightfoot
415-364-2500
investorrelations@tweisel.com

Media Contact:
Crystal Odessky
415-364-2500
codessky@tweisel.com





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