Cowen Announces Senior Electronic Trading Hires

Jason Oien Joins as Head of Electronic Trading Services

Jennifer Hadiaris Joins as Head of Global Market Structure

NEW YORK–(BUSINESS WIRE)–Dec. 21, 2016–
Cowen Group, Inc. (NASDAQ:COWN) (“Cowen” or the “Company”) today
announced two new senior hires within Cowen and Company’s electronic
trading division. Jason Oien joins as Managing Director and Head of
Electronic Trading Services. Jennifer Hadiaris joins as Managing
Director and Head of Global Market Structure.

“Jason and Jennifer play a key role in furthering Cowen’s position as
the leading platform for broker-neutral execution solutions,” said Dan
Charney, Cowen’s Head of Equities. “Our priority is to help clients make
informed trading decisions by providing value-added tools – such as
non-conflicted trading and algorithmic execution – and insights on
issues that impact clients. Jason is an accomplished professional who
will lead Cowen’s electronic trading division. He has longstanding
client relationships and a track record of delivering outstanding
electronic execution services for them. Jennifer is a well-respected
voice on market structure and its impact to investors, corporates and
markets. Her insights and strategies will be a valuable resource to
clients.”

Prior to joining Cowen, Mr. Oien was with Goldman Sachs where he was
responsible for West Coast Electronic Sales and International Electronic
Trading Sales. Previously, Mr. Oien was an account executive at Instinet
Corporation in sales trading, portfolio trading and electronic trading.
Before that, he was a sales trader and market maker at Jefferies. Mr.
Oien holds a BS from The Ohio State University.

Most recently, Ms. Hadiaris was with Deutsche Bank where she led the
market structure team as the Head of Global Market Structure, Americas.
Prior to that, she spent ten years at RBC Capital Markets where she
served in a similar capacity. Ms. Hadiaris graduated from Harvard
University with a BA. In 2014 she was recognized by Traders Magazine
as a Rising Star.

About Cowen Group, Inc.

Cowen Group, Inc. is a diversified financial services firm and, together
with its consolidated subsidiaries, provides alternative asset
management, investment banking, research, sales and trading and prime
brokerage services through its two business segments: Ramius and its
affiliates make up the Company’s alternative investment segment, while
Cowen and Company, a member of FINRA and SIPC, and its affiliates make
up the Company’s broker-dealer segment. Ramius provides alternative
asset management solutions to a global client base and manages a
significant portion of Cowen’s proprietary capital. Cowen and Company
and its affiliates offer industry focused investment banking for
growth-oriented companies, domain knowledge-driven research, a sales and
trading platform for institutional investors and a comprehensive suite
of prime brokerage services. Founded in 1918, the firm is headquartered
in New York and has offices worldwide. For additional information, visit www.cowen.com.

View source version on businesswire.com: http://www.businesswire.com/news/home/20161221005145/en/

Source: Cowen Group, Inc.

MEDIA:
Gagnier Communications
Dan Gagnier, 646-273-9391