The Relentless Pursuit of Opportunity


Our mission is to have a positive impact on the global economy by deploying capital to reach
its fullest potential.

Analyzing global markets with discipline and focus, we employ a diverse range of strategies in an effort to bring capital to its fullest potential and deliver consistent investment returns to our clients. We do this by working harder, seeing farther, and by empowering the world’s most talented minds with the tools and culture they need to achieve peak performance.

We fundamentally believe that fair, transparent, and open markets around the world benefit all investors and contribute to a healthy global economy.

Our firm is guided by its core values of championing honesty, rewarding excellence, continuously learning, solving problems together, and earning the win. Founded over 25 years ago, we succeed by approaching each day like it’s the first.

Our Team


Kenneth C. Griffin

Founder and Chief Executive Officer

Kenneth C. Griffin

In 1987, Ken Griffin, a then-19-year-old sophomore at Harvard University, started trading from his dorm room with a fax machine, a personal computer, and a telephone. From this modest but ambitious beginning, Ken caught the attention of hedge fund pioneer and co-founder of Chicago-based Glenwood Partners, Frank Meyer, earning him the opportunity to establish what would one day become Citadel.

Ken founded Citadel in 1990 and has since served as the firm’s Chief Executive Officer. Today, Citadel is recognized as one of the most respected and successful investment firms in the world, and manages over $26 billion in capital for its partners.

Ken is a passionate philanthropist, supporting educational and cultural causes that drive community engagement and improvement. He has given over $500 million, personally and through the Citadel Foundation, to numerous organizations including The University of Chicago, the Ann & Robert Lurie Children’s Hospital, The Field Museum of Natural History, the Art Institute of Chicago, the Museum of Modern Art, and the American Museum of Natural History.

As a leader within the Chicago community, Ken actively participates in civic and cultural institutions, serving on the Board of Directors of the Chicago Public Education Fund, and the Board of Trustees for the Art Institute of Chicago, the Museum of Contemporary Art Chicago, the Whitney Museum of American Art, and The University of Chicago. He is also a member of numerous business organizations, including G100, the Civic Committee of the Commercial Club of Chicago, and the Economic Club of Chicago.

Ken earned his bachelor’s degree from Harvard University and is a proud supporter of his alma mater. In 2014, he donated $150 million to support need-based financial aid at Harvard, the largest gift in school history at the time.

Gerald A. Beeson

Chief Operating Officer

Gerald A. Beeson

Gerald A. Beeson is the Chief Operating Officer of Citadel. As COO, he is responsible for the firm’s key corporate functions globally and is a member of Citadel’s Portfolio Committee. Prior to becoming COO in 2008, Gerald served as Citadel’s Chief Financial Officer, a role he has held since 2003. He joined Citadel in 1993 as an intern and was among the company’s first employees.

Gerald currently sits on the Market Risk Advisory Committee for the U.S. Commodity Futures Trading Commission, and previously served on the Board of Directors for the Managed Funds Association and The Depository Trust & Clearing Corporation.

Gerald received his MBA from the University of Chicago and a bachelor’s degree in Commerce with concentrations in Accountancy and Finance from DePaul University. He is registered as a certified public accountant with the State of Illinois and was named to Crain’s Chicago Business “Forty Under Forty” in 2007.

Gerald is a trustee of DePaul University and a 2014 recipient of the DePaul University Presidential Medal. He is also a member of the Board of Advisors for Catholic Charities of the Archdiocese of Chicago as well as the Board of Directors for Marist High School and Big Shoulders Fund. Gerald is a member of the 2017 Class of Henry Crown Fellows within the Aspen Global Leadership Network at the Aspen Institute.

Shawn Fagan

Chief Legal Officer

Shawn Fagan

Shawn Fagan is Chief Legal Officer of Citadel, responsible for Citadel’s global legal, compliance, transaction management, and regulatory affairs functions. Shawn is a member of Citadel’s Portfolio Committee.

Prior to joining Citadel in 2005, Shawn was a Partner at Bartlit, Beck, Herman, Palenchar & Scott. Previously, he served as a clerk for Chief Justice William Rehnquist of the U.S. Supreme Court and Judge Douglas H. Ginsburg of the U.S. Court of Appeals for the District of Columbia.

Shawn received a bachelor’s degree from the University of Michigan and a J.D. from Harvard Law School.

Joanna Welsh

Chief Risk Officer

Joanna Welsh

Joanna Welsh is Chief Risk Officer at Citadel. Joanna chairs Citadel’s Portfolio Committee and advises in determining risk tolerance levels for the strategies, businesses, and the funds as a whole.

Prior to joining Citadel, Joanna was at Tudor Investment Corporation for 15 years, most recently serving as Chief Risk Officer. With more than 20 years of experience in financial services and risk management, she also held senior risk positions at Commerzbank and Nomura.

Joanna received a master’s and bachelor’s degree from Oxford University.

Ed O’Reilly

Global Head of the Client and Partner Group

Ed O’Reilly

Ed O’Reilly is Global Head of the Client and Partner Group at Citadel. He is responsible for managing the firm’s relationships with all investors globally. Ed is a Portfolio Committee member.

Prior to joining Citadel, Ed O’Reilly was a Partner and Head of Investor Relations for the Americas at Capula Investment US LP. Ed started his career at The O’Connor Partnership, Chicago, where he managed the non-investment aspects of a dynamic, derivatives market making and proprietary trading business within the Fixed Income, Currencies and Commodities (FICC) and Equities businesses in a COO function. Throughout his career with O’Connor / Swiss Bank Corporation / UBS and later with Peloton Partners, Ed was based in a variety of financial centers: Chicago, Singapore, Zurich and London. This experience ultimately led him to spend 18 years abroad.

Ed is a member of The Economic Club of New York, The Aspen Institute Society of Fellows, and The Development Board for the Brunswick School in Greenwich, Connecticut.

Ed received his Master of Business Administration from Duke University and a bachelor’s degree from Miami University, Oxford, Ohio.

Dr. Ben S. Bernanke

Senior Advisor

Dr. Ben S. Bernanke

Dr. Ben S. Bernanke is a Distinguished Fellow in residence with the Economic Studies Program at the Brookings Institution. From February 2006 through January 2014, he was Chairman of the Board of Governors of the Federal Reserve System, having been appointed to that position by both Presidents Bush and Obama. Dr. Bernanke also served as Chairman of the Federal Open Market Committee, the System’s principal monetary policymaking body.

Before his appointment as chairman, Dr. Bernanke was chairman of the President’s Council of Economic Advisers, from June 2005 to January 2006. He was a member of the Board of Governors of the Federal Reserve System from 2002 to 2005.

From 1994 to 1996, Dr. Bernanke was the Class of 1926 professor of Economics and Public Affairs at Princeton University. He was the Howard Harrison and Gabrielle Snyder Beck Professor of Economics and Public Affairs and chair of the Economics Department at the university from 1996 to 2002. Dr. Bernanke had been a professor of Economics and Public Affairs at Princeton since 1985.

Before arriving at Princeton, Dr. Bernanke was an associate professor of Economics (1983-85) and an assistant professor of Economics (1979-83) at the Graduate School of Business at Stanford University. His teaching career also included serving as a visiting professor of Economics at New York University and at the Massachusetts Institute of Technology. He received a Bachelor of Arts degree in Economics in 1975 from Harvard University (summa cum laude) and a Doctor of Philosophy degree in Economics in 1979 from the Massachusetts Institute of Technology.

Track Record

For more than two decades we have sought new ways to capitalize on market opportunities. With everything we achieve, we recognize the fundamental truths that inspire us to always keep pushing forward.


In-House System of the Year by Risk Magazine

Citadel reaches $26 billion in investment capital.


Leadership Recognized

Citadel receives “A” grade in Institutional Investor’s alpha report card, wins five awards from Absolute Return, and is Named Hedge Fund of the Year by Risk Magazine. Firm is named “One of the country’s 50 Best Workplaces for Recent College Graduates” by Fortune Magazine and Great Place to Work. Launches Aptigon Capital, fundamental equities trading business based in Greenwich.


Continued Focus on Performance

Crossing the $25b billion mark in investment capital, Citadel is named “Hedge Fund of the Year” by Institutional Investor and “Top 10 Best Places to Work in Financial Services” by Fortune Magazine. Ben Bernanke, former Chairman of the Federal Reserve, joins the firm as senior advisor. Citadel’s Risk Management Center recognized as “Best Risk Management Initiative” by the American Financial Technology Awards.


Multistrategy Hedge Fund Manager of the Year

Institutional Investor Magazine recognizes Citadel as Multistrategy Hedge Fund Manager of the Year. The firm’s Global Fixed Income business wins Best Global Macro Fund of the Year from Absolute Return.


Citadel ranked best overall hedge fund by Hedge Funds America


Firm expands operations to Boston, Dallas and Houston


Hedge Fund Hall of Fame

Institutional Investor’s Alpha creates the Hedge Fund Hall of Fame, naming Ken Griffin among the 14 inaugural inductees. Citadel launches Surveyor Capital, a fundamental equities trading business, as well as its tactical funds and macro businesses.


Citadel receives Euromoney’s best global hedge fund award


Opens offices in Hong Kong

Acquires large portions of Amaranth Advisors’ energy portfolio and Sowood’s credit portfolio. Firm opens offices in Hong Kong.


Launch of foreign exchange business

Firm crosses $10b threshold in investment capital. Launches foreign exchange business.


Moves into global headquarters in Chicago


Launches commodities business

Following the collapse of Enron, Ken Griffin leads an effort to hire energy traders, meteorologists, and quantitative researchers, launching the firm’s commodities business. Operations expand to San Francisco.


Launches equities business


Launches credit strategies business. Opens London office


$1b in investment capital

With a team of 100 employees, Citadel reaches the $1 billion mark in investment capital and is recognized with the Relative Value/Arbitrage Award by Alternative Investments. Fixed income business launches.


Firm reaches $500m in investment capital


Name changes to Citadel. Statistical arbitrage business launches

The firm is renamed “Citadel”, reflecting the firm’s strength as it expanded and diversified to more markets worldwide.


Griffin Moves to Chicago

Firm founded as Wellington Financial Group. Launches convertible bond arbitrage business.



As a student at Harvard, Ken Griffin reads an article in Forbes that inspires him to begin trading convertible bonds. He persuades his dorm’s janitor to allow him to place a satellite dish on the rooftop in order to access real-time information. From this modest beginning, Griffin raises nearly $1m, catching the attention of Frank Meyer, a hedge fund pioneer and co-founder of Chicago-based Glenwood Partners.


Global Headquarters
131 South Dearborn Street
Chicago, IL 60603 USA

TEL 312-395-2100
FAX 312-267-7100

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28 State Street
6th Floor
Boston, MA 02109 USA

TEL 1.617.531.4900

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300 Crescent Court
Suite 250
Dallas, TX 75201 USA

TEL 1.972.892.1700

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Denver Tech Center
4600 S. Syracuse St, 9th Flr
Denver, CO 80237 USA

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33 Benedict Place
3rd Floor
Greenwich, CT 06830 USA

TEL 1.203.900.6000

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Hong Kong

Chater House Suites 1801, 1806-10
8 Connaught Road
Central, Hong Kong

TEL 852.3667.5500
FAX 852.3667.5501

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Bank of America Center
700 Louisiana St.
Suite 4600
Houston, TX 77002 USA

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120 London Wall
London EC2Y 5ET
United Kingdom

Pillar 3 Disclosure Documents
Citadel Europe LLP
Citadel Securities (Europe) Limited
UK Stewardship Code Disclosure
Citadel Europe LLP

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New York

601 Lexington Avenue
(Between 53rd & 54th St)
New York, NY 10022 USA

TEL 1.646.403.8200
FAX 1.646.403.8268

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San Francisco

4 Embarcadero Center
San Francisco, CA 94111 USA

TEL 1.415.354.7200

One Market Plaza
San Francisco, CA 94105 USA

TEL 1.415.354.7300

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15/F Plaza 66, Tower II
Nanjing West Road
Shanghai, China

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44/F, Tower A, NEO
No. 6011, Shennan Ave
Futian District
Shenzhen, 518048, China

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First Canadian Place
100 King Street West
Suite 4720
PO Box 147
Toronto, Ontario
M5X 1C7

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Our Investment Strategies