David Booth is Executive Chairman of Dimensional Fund Advisors, a firm he founded in 1981. Under David’s leadership, Dimensional has grown from a fledgling business operating out of the spare room of his Brooklyn brownstone apartment to a global investment manager with more than 1,400 employees and $575 billion in assets under management. David led Dimensional as CEO and later Co-CEO until 2017, when he stepped back from the daily management of the firm. He remains closely involved in strategic initiatives at Dimensional.

A trailblazer in the financial world, David helped create one of the world’s first index funds in the 1970s and launched the first passively managed small company strategy in the early ’80s. He has spent his career applying groundbreaking financial theory and research to the practical world of asset management, working closely with renowned academics to develop innovative investment strategies that he believed could outperform index funds, pioneering what would later be called factor investing.

David received a bachelor’s degree in economics in 1968 and a master’s degree in business in 1969 from the University of Kansas. In 1971, he received an MBA from the University of Chicago. Over the years, David has been a benefactor to both schools. Upon announcing a gift from the Booth family to the business school at Chicago in 2008, David cited his education there as being instrumental to his later success with Dimensional. The University of Chicago Booth School of Business is named in David’s honor, and the gift has helped to advance its field-defining research and to support the school’s faculty, a number of whom have had close ties to Dimensional. David has also donated to support athletics at the University of Kansas—as a boy, he ushered there at football games—and he is a vocal advocate of the role sports play in keeping alumni connected to a school.

An avid art collector and enthusiast, David has participated in and donated to artistic initiatives across the US, and the David Booth Conservation Center and Department is responsible for the preservation of the Museum of Modern Art’s collection in New York.

Boards and Committees

University of Chicago Board of Trustees
The Museum of Modern Art Board of Trustees
The Museum of Modern Art Executive Committee
Becker Friedman Institute Board of Overseers
Hoover Institution Board of Overseers

Awards and Recognition

2022 – Museum of Modern Art’s David Rockefeller Award
2018 – University of Chicago Medal
2017 – Investment News Icons and Innovators Award
2016 – Institutional Investor Investment Management Lifetime Achievement Award
2016 – Forbes Money Masters: The 40 Most Powerful People in the Financial World
2012 – Financial Management Association International’s Outstanding Financial Executive Award
2010 – Investment News “The Power 20” in the financial services industry
1992 – Financial Analysts Journal Graham and Dodd Award of Excellence

Dave Butler serves as Co-Chief Executive Officer of Dimensional Fund Advisors LP and is a Dimensional Director. He joined the firm in 1995 and was named Co-CEO in 2017. Along with Co-CEO Gerard O’Reilly, Dave guides Dimensional’s vision and strategy, inspiring innovation and growth. He is passionate about helping clients develop perspective on the markets so that they can have a better investment experience, and he frequently interacts with professional investors and industry leaders around the globe. Dave also serves on the Boards of Dimensional’s US mutual funds and exchange-traded funds.

Gerard O’Reilly serves as Co-Chief Executive Officer and Chief Investment Officer of Dimensional Fund Advisors LP and is a Dimensional Director. He was named Co-CEO in 2017 and has been with Dimensional since 2004. Along with Co-CEO Dave Butler, Gerard guides the firm’s vision and strategy through daily oversight of the company’s people and processes.

Since joining the firm, Gerard has been instrumental in the evolution of Dimensional’s systematic approach to creating and implementing investment solutions. He was formerly Head of Research, managing the firm’s rigorous, scientific approach to interpreting, testing, and applying research in portfolios. He is a member of the firm’s Investment Research Committee, which reviews potential investment strategy enhancements, and a member of the Investment Committee, which oversees portfolio and account management. He also serves on the Boards of Dimensional’s US mutual funds and exchange-traded funds.

Prior to joining Dimensional, Gerard obtained his PhD in aeronautics from the California Institute of Technology. He holds a master of science degree in high performance computing from Trinity College Dublin in his native country of Ireland, where he also received a first class honors degree in theoretical physics and was a recipient of the Foundation Scholarship.

Stephen A. Clark is the President of Dimensional International. Steve is also a member of Dimensional’s Executive Committee and Investment Committee.

Steve began his career at Dimensional as a US Equity Portfolio Manager in 2001 and has over 20 years of financial industry experience working with investment, research, and sales professionals as well as a variety of asset owners. He led the Institutional Services team until the end of 2018. Prior to joining the Institutional team in 2012, he led the Global Portfolio Management team. Steve’s current role focuses on ensuring consistent solutions are delivered to our clients around the world. He works closely with the Investment team to implement new, research-driven products and is a prominent influence on key business decisions and firmwide advancements.

Prior to Dimensional, Steve began his financial career in 1997 at John Nuveen & Company, where he was involved in structuring mergers and acquisitions for the company's health care services division. He holds an MBA from the University of Chicago Booth School of Business and a BS from Bradley University.

Lisa Dallmer, Chief Operating Officer, leads Dimensional’s Finance, Operations, and Technology teams. Lisa is an experienced, customer-centric technology leader in financial services. She is passionate about operationalizing strategy and commercializing growth and has brought her extensive experience of working with CEOs, sales, and product development teams to her role at Dimensional.

Prior to joining Dimensional, Lisa was Chief Operating Officer and Managing Director at BlackRock’s Global Technology and Operations Group, where she led operating model strategy, operationalized platform technology, and drove tech-enabled transformations. She also served as Chief Operating Officer at NYSE Euronext in Paris, leading the commercial model for the technology and trading markets.

In 2011 and 2013, Lisa was recognized among Financial News’ 100 Most Influential Women in Finance for driving change across Europe’s financial services industry. She holds an MBA from the University of Chicago Booth School of Business and a BA from Miami University, and she received additional training at the London School of Economics.

Aaron Marcus, Head of Global Human Resources, leads the recruiting, development, and reward of Dimensional employees across the firm's offices worldwide. Aaron is also the Head of our Charlotte office. Since joining Dimensional in 2008, Aaron has grown the Human Resources department from a service provider to business driver, evolving its benefits and support, employee training opportunities, hiring strategy, and people-related systems and policies in support of Dimensional's business objectives.

Prior to Dimensional, Aaron spent 14 years at Goldman Sachs in New York, London, and Hong Kong. In his last role at Goldman, he oversaw the company’s worldwide hiring. He also managed campus recruiting globally as well as the global HR practice for the sales and trading divisions of the firm. Aaron began his Goldman career in commodity operations. He holds a BA in Judaic studies from Brown University.

Catherine Newell serves as General Counsel for Dimensional, supervising the legal work of Dimensional and its subsidiaries and funds. In this role, she oversees the preparation of new product and corporate governance materials, business contracts, and other legal and regulatory matters, and heads up the firm’s Global Legal team. In addition, Catherine serves on Dimensional’s seven-person Executive Committee in the role of Chief of Staff. Prior to joining Dimensional in 1996, she was an associate in the law firm of Morrison & Foerster LLP, practicing in the areas of corporate finance and investment management law. 

Catherine earned a JD from the University of California, Los Angeles, School of Law in 1989, where she served on the UCLA Law Review, and a bachelor of arts in government from the University of Notre Dame in 1986.

Global Chief Compliance Officer Selwyn Notelovitz is Chief Compliance Officer for Dimensional Fund Advisors LP. He oversees all compliance matters for the firm and its subsidiaries. Selwyn also oversees the firm’s Global Risk Management program.

Selwyn has more than 30 years of experience in the asset management industry. Before assuming his current role, he was Dimensional’s Deputy Chief Compliance Officer, serving as the principal compliance officer for Portfolio Management, Trading, and other investment-related compliance support, and overseeing Dimensional’s EMEA compliance as well as the firm’s Code of Ethics programs.

Prior to joining Dimensional in 2012, he was global chief compliance officer at Wellington Management Company LLP. He previously served as global chief compliance officer at Charles Schwab and chief compliance officer and senior vice president of global corporate and investment banking for Bank of America. In addition, Selwyn was a branch chief at the Securities and Exchange Commission in Washington, DC. Selwyn received law degrees from Georgetown University Law Center and the University of Florida, where he also completed his bachelor’s degree. He is a member of the Florida and Virginia bars and holds Series 7 and 24 licenses with FINRA.

John Alkire is Chief Executive Officer of Dimensional Japan Ltd. and serves as the head of Dimensional’s Japan operations. John was appointed CEO of Dimensional Japan in November 2012 and began his tenure in January 2013. Prior to his appointment, John was a consultant to Dimensional, assisting the firm in its expansion in Asia.

John has more than 35 years of securities investment experience. Previously, he served as president and chief investment officer of Morgan Stanley Asset & Investment Trust Management Co., Ltd. (MSAITM) in Tokyo, where he oversaw approximately $45 billion in institutional assets. John joined Morgan Stanley in 1981 as head of institutional equity for Asia in New York and established MSAITM, later renamed Morgan Stanley Investment Management (Japan), in Japan in 1995. In 1996, MSAITM was selected by Japan’s Government Pension Investment Fund (then called Nempuku) as one of the first three investment managers to manage its assets.

John’s relationship with Dimensional began in the late 1980s. He first worked with Dimensional founder David Booth in 1985, and while at Morgan Stanley, he helped launch a Japanese small company strategy for Dimensional in 1986.

John was the first non-Japanese vice chairman of the Japanese Securities Investment Advisors Association, from 1998 to 2000. He was born and raised in Japan, speaks fluent Japanese, and graduated from the University of Victoria, British Columbia.

J. Glenn Crane is a founding director of DFA Australia Limited and was responsible for establishing the business in 1994. He is Chairman of the board of directors and the Compliance Committee.

Glenn has extensive experience in all aspects of the financial services sector. In addition to his role at Dimensional, he is chairman of Ceanet Pty Limited and Inlogik Group Pty Limited and is a fellow of the Australian Institute of Company Directors. Glenn received his BComm and LLB from the University of New South Wales and practiced law for five years before moving into the commercial environment.

John Romiza is Co-CEO of Dimensional Fund Advisors Ltd. (Dimensional UK). As Co-CEO, he focuses on Dimensional’s client service and sales activity in the EMEA region. In addition to his Co-CEO responsibilities, he is a Director of Dimensional UK and Dimensional Ireland Limited (Irish UCITS management company affiliated with Dimensional UK) and is a member of Dimensional UK’s investment and management committees. He chairs the Board of Directors of Dimensional Funds plc and Dimensional Funds II plc (Irish UCITS managed by Dimensional UK). John joined Dimensional in 2008 as Head of International Trading.

Prior to joining Dimensional, John served as senior vice president and director of European trading for Franklin Templeton. During his eight years with Franklin, John built the firm’s European trading operation; his responsibilities included full oversight of all EMEA equity trading for the parent organisation. He received a BS in finance from Bentley College in Boston.

Nathan Lacaze is Co-CEO of Dimensional Fund Advisors Ltd. (Dimensional UK). Along with Co-CEO John Romiza, Nathan provides daily oversight of Dimensional UK’s business as a whole. In addition to his Co-CEO responsibilities, Nathan is a Director of Dimensional UK, a member of Dimensional UK’s investment and management committees, and on the Board of Directors of Dimensional Funds plc and Dimensional Funds II plc (Irish UCITS managed by Dimensional UK). He also chairs the Board of Directors of Dimensional Ireland Limited (Irish UCITS management company affiliated with Dimensional UK) and takes an active role with clients.

Nathan joined Dimensional as a Trading Assistant in 2004 and became Head of Portfolio Management, EMEA, before assuming the role of Co-CEO. He earned a bachelor of chemical engineering and a bachelor of commerce, with majors in finance and economics, from the University of Sydney. He received an MBA from the University of Chicago Booth School of Business and is a CFA® charterholder.

Joel Kim is CEO of Dimensional’s Asia ex Japan business as well as a Director of Dimensional Fund Advisors Pte. Ltd. (Dimensional’s Singapore subsidiary) and a Director of Dimensional Hong Kong Limited. Based in Singapore, Joel manages Dimensional’s business interests in the region and ensures alignment with the firm’s global priorities. In partnership with local and global leadership, he oversees the development and implementation of the region’s growth strategy and day-to-day business operations. Joel represents Dimensional in client and regulatory affairs, as well as relevant industry and community events.

Joel has more than 20 years of industry experience, and he joined Dimensional in its Singapore office as a Senior Portfolio Manager in 2016. He most recently served in the firm’s London office solely as Head of International Fixed Income, overseeing fixed income portfolio management outside the US. He continues to fulfill this role from the firm’s Singapore office. Prior to joining Dimensional, he was head of Asia Pacific fixed income for BlackRock in Singapore, where he was responsible for portfolio management of fixed income strategies in the region, including Australia and Japan. Before his time at BlackRock, Joel spent nearly 14 years with ING Investment Management, where he held various fixed income portfolio management positions in Europe and Asia, lastly as head of Asian debt.

Joel has a master’s degree in economics from the University of Amsterdam and is a CFA® charterholder.

David Booth is Executive Chairman of Dimensional Fund Advisors, a firm he founded in 1981. Under David’s leadership, Dimensional has grown from a fledgling business operating out of the spare room of his Brooklyn brownstone apartment to a global investment manager with more than 1,400 employees and $575 billion in assets under management. David led Dimensional as CEO and later Co-CEO until 2017, when he stepped back from the daily management of the firm. He remains closely involved in strategic initiatives at Dimensional.

A trailblazer in the financial world, David helped create one of the world’s first index funds in the 1970s and launched the first passively managed small company strategy in the early ’80s. He has spent his career applying groundbreaking financial theory and research to the practical world of asset management, working closely with renowned academics to develop innovative investment strategies that he believed could outperform index funds, pioneering what would later be called factor investing.

David received a bachelor’s degree in economics in 1968 and a master’s degree in business in 1969 from the University of Kansas. In 1971, he received an MBA from the University of Chicago. Over the years, David has been a benefactor to both schools. Upon announcing a gift from the Booth family to the business school at Chicago in 2008, David cited his education there as being instrumental to his later success with Dimensional. The University of Chicago Booth School of Business is named in David’s honor, and the gift has helped to advance its field-defining research and to support the school’s faculty, a number of whom have had close ties to Dimensional. David has also donated to support athletics at the University of Kansas—as a boy, he ushered there at football games—and he is a vocal advocate of the role sports play in keeping alumni connected to a school.

An avid art collector and enthusiast, David has participated in and donated to artistic initiatives across the US, and the David Booth Conservation Center and Department is responsible for the preservation of the Museum of Modern Art’s collection in New York.

Boards and Committees

University of Chicago Board of Trustees
The Museum of Modern Art Board of Trustees
The Museum of Modern Art Executive Committee
Becker Friedman Institute Board of Overseers
Hoover Institution Board of Overseers

Awards and Recognition

2022 – Museum of Modern Art’s David Rockefeller Award
2018 – University of Chicago Medal
2017 – Investment News Icons and Innovators Award
2016 – Institutional Investor Investment Management Lifetime Achievement Award
2016 – Forbes Money Masters: The 40 Most Powerful People in the Financial World
2012 – Financial Management Association International’s Outstanding Financial Executive Award
2010 – Investment News “The Power 20” in the financial services industry
1992 – Financial Analysts Journal Graham and Dodd Award of Excellence

Eugene F. Fama, 2013 Nobel laureate in Economic Sciences, is the principal scholar whose groundbreaking work inspired the founding of Dimensional. Widely recognized as the "father of modern finance," Professor Fama developed the efficient market hypothesis. He is a Dimensional Director and serves on the firm’s Investment Research Committee. In this capacity, Professor Fama advises the firm on many of its strategies and is also a frequent speaker at Dimensional conferences and seminars. Professor Fama has written two books and published more than 100 articles in academic journals. His paper "The Cross-Section of Expected Stock Returns," coauthored with Kenneth R. French, won the 1992 Smith Breeden Prize for the best paper in the Journal of Finance. And his paper "Market Efficiency, Long-Term Returns, and Behavioral Finance" won the 1998 Fama-DFA Prize for the best paper published in the Journal of Financial Economics in the areas of capital markets and asset pricing.

Professor Fama received the Fred Arditti Innovation Award from the CME Center for Innovation in 2007. He was also the first recipient of three major prizes for research in finance: the Deutsche Bank Prize in Financial Economics in 2005, the Morgan Stanley American Finance Association Award for Excellence in Finance in 2007, and the Onassis Prize in Finance in 2009. His other awards include the 1982 Chaire Francqui (Belgian National Science Prize) and the 2006 Nicholas Molodovsky Award from the CFA Institute.

Professor Fama was the first elected fellow of the American Finance Association in 2001 and is a fellow of the Econometric Society and the American Academy of Arts and Sciences. He is also an advisory editor of the Journal of Financial Economics and chairman of the Center for Research in Security Prices at the University of Chicago Booth School of Business.

Professor Fama earned a bachelor's degree from Tufts University and an MBA and PhD from the University of Chicago Booth School of Business in 1964. He joined the Chicago Booth faculty in 1963. He has been awarded a doctor of law degree from the University of Rochester; a doctor of law degree from DePaul University; a doctor honoris causa from the Catholic University of Leuven, Belgium; and a doctor of science honoris causa from Tufts.

Kenneth R. French is the Roth Family Distinguished Professor of Finance at the Tuck School of Business at Dartmouth College. He is an expert on the behavior of security prices and investment strategies. He and coauthor Eugene F. Fama are well known for their research into the value effect and the three- and five-factor models, including articles such as “The Cross-Section of Expected Stock Returns” and “Common Risk Factors in the Returns on Stocks and Bonds.” His recent research focuses on patterns in expected returns in domestic and international financial markets and tests of asset pricing models.

Professor French is a consultant to Dimensional Fund Advisors, a Dimensional Director, and Co-Chair of Dimensional's Investment Research Committee. He is also a regular speaker at Dimensional conferences and seminars.

Professor French is a Fellow of the American Academy of Arts and Sciences, the American Finance Association, and the Financial Management Association. He is also a research associate at the National Bureau of Economic Research; an advisory editor of the Journal of Financial Economics, the Journal of Banking and Finance, and the Financial Review; a former associate editor of the Journal of Finance and the Review of Financial Studies; and a former president of the American Finance Association. Professor French is a member of the International Rescue Committee's Board of Overseers and chair of the Valpo Surf Project's Board of Directors.

Before joining Dartmouth, Professor French was on the faculty of MIT's Sloan School of Management, the Yale School of Management, and the University of Chicago's Booth School of Business. Professor French received his PhD in finance from the University of Rochester in 1983. He also earned an MS and an MBA from the University of Rochester and a BS from Lehigh University.

John "Mac" McQuown worked with Dimensional cofounder David G. Booth to develop the first institutional index funds at Wells Fargo in the early 1970s, and was the first chairman of the Wells Fargo Investment Advisors (now Barclays Global Investors). He maintains close ties to investment strategies as a cofounding Dimensional Director.

As an independent consultant, McQuown worked with large multinational financial institutions in the development and implementation of investment strategies in markets around the globe. In addition to serving on Dimensional's board of directors, he is cofounder and director of Diversified Credit Investments LLC, which builds diversified corporate debt portfolios with proprietary quantitative methods. McQuown owns and oversees Stone Edge Vineyard and Stone Edge Farm Winery in Sonoma, California.

Gerard O’Reilly serves as Co-Chief Executive Officer and Chief Investment Officer of Dimensional Fund Advisors LP and is a Dimensional Director. He was named Co-CEO in 2017 and has been with Dimensional since 2004. Along with Co-CEO Dave Butler, Gerard guides the firm’s vision and strategy through daily oversight of the company’s people and processes.

Since joining the firm, Gerard has been instrumental in the evolution of Dimensional’s systematic approach to creating and implementing investment solutions. He was formerly Head of Research, managing the firm’s rigorous, scientific approach to interpreting, testing, and applying research in portfolios. He is a member of the firm’s Investment Research Committee, which reviews potential investment strategy enhancements, and a member of the Investment Committee, which oversees portfolio and account management. He also serves on the Boards of Dimensional’s US mutual funds and exchange-traded funds.

Prior to joining Dimensional, Gerard obtained his PhD in aeronautics from the California Institute of Technology. He holds a master of science degree in high performance computing from Trinity College Dublin in his native country of Ireland, where he also received a first class honors degree in theoretical physics and was a recipient of the Foundation Scholarship.

Dave Butler serves as Co-Chief Executive Officer of Dimensional Fund Advisors LP and is a Dimensional Director. He joined the firm in 1995 and was named Co-CEO in 2017. Along with Co-CEO Gerard O’Reilly, Dave guides Dimensional’s vision and strategy, inspiring innovation and growth. He is passionate about helping clients develop perspective on the markets so that they can have a better investment experience, and he frequently interacts with professional investors and industry leaders around the globe. Dave also serves on the Boards of Dimensional’s US mutual funds and exchange-traded funds.

Reena Aggarwal is an independent director on the Boards for Dimensional’s US mutual funds and exchange-traded funds. She is the Robert E. McDonough Professor of Finance and Director of the Center for Financial Markets and Policy at Georgetown University’s McDonough School of Business. Professor Aggarwal has served as an academic fellow at FINRA and the SEC, as a visiting research scholar at the IMF, as a Fulbright Scholar to Brazil, on a World Economic Forum Global Future Council, and as a distinguished scholar at the Reserve Bank of India’s Centre for Advanced Financial Research and Learning. Professor Aggarwal has advised financial institutions and governments around the world. She focuses on global financial markets, capital raising, initial public offerings, initial coin offerings, financial technology, institutional investors, ETFs, private equity, valuation, stock exchange structure, securities market regulation, corporate governance, and environmental, social, and governance considerations (ESG). Professor Aggarwal received a PhD in finance from the University of Maryland and an MMS from the Birla Institute of Technology and Science in India.

Dave Butler serves as Co-Chief Executive Officer of Dimensional Fund Advisors LP and is a Dimensional Director. He joined the firm in 1995 and was named Co-CEO in 2017. Along with Co-CEO Gerard O’Reilly, Dave guides Dimensional’s vision and strategy, inspiring innovation and growth. He is passionate about helping clients develop perspective on the markets so that they can have a better investment experience, and he frequently interacts with professional investors and industry leaders around the globe. Dave also serves on the Boards of Dimensional’s US mutual funds and exchange-traded funds.

An independent director of Dimensional's US mutual fund board, George M. Constantinides is the Leo Melamed Professor of Finance at the Chicago Booth School of Business. He is a leader in portfolio management, asset pricing, derivatives pricing, and capital markets behavior. Widely published and a frequent speaker and editor, Professor Constantinides is a Fellow of the American Finance Association and former president of the American Finance Association and of the Society for Financial Studies, among many other professional affiliations. A graduate of Oxford University in England and Indiana University, he has been a Marvin Bower Fellow at Harvard University and taught at Carnegie Mellon University.

Douglas W. Diamond specializes in the study of financial intermediaries, financial crises, and liquidity. He is the Merton H. Miller Distinguished Service Professor of Finance at the University of Chicago’s Booth School of Business. He has been on the faculty since 1979. Diamond is a research associate of the National Bureau of Economic Research and a visiting scholar at the Federal Reserve Bank of Richmond. He was president of the American Finance Association and the Western Finance Association and is a fellow of the National Academy of Sciences, the Econometric Society, the American Academy of Arts and Sciences, and the American Finance Association. Diamond received the CME Group- Mathematical Sciences Research Institute Prize in Innovative Quantitative Applications in 2016 and the Morgan Stanley-American Finance Association Award for Excellence in Finance in 2012.

He has taught at Yale and was a visiting professor at the MIT Sloan School of Management, the Hong Kong University of Science and Technology as well as the University of Bonn. Diamond earned a bachelor's degree in economics from Brown University in 1975. He earned master's degrees in 1976 and 1977 and a PhD in 1980 in economics from Yale University.

Darrell Duffie is the Dean Witter Distinguished Professor of Finance at Stanford University’s Graduate School of Business. He is a Fellow and member of the Council of the Econometric Society, a Research Fellow of the National Bureau of Economic Research, and a Fellow of the American Academy of Arts and Sciences. Professor Duffie was also the 2009 president of the American Finance Association and was a member of the board of directors of Moody’s Corp. from 2008 to 2018. In 2014, he chaired the Market Participants Group, charged by the Financial Stability Board with recommending reforms to Libor, Euribor, and other interest rate benchmarks. His recent books include How Big Banks Fail (Princeton University Press, 2010), Measuring Corporate Default Risk (Oxford University Press, 2011), and Dark Markets (Princeton University Press, 2012).

Francis A. Longstaff is an independent director on the Boards for Dimensional’s US mutual funds and exchange-traded funds. He is Allstate Professor of Insurance and Finance at UCLA’s Anderson School of Management. Professor Longstaff served as head of fixed income derivative research at Salomon Brothers in New York and worked in the research department of the Chicago Board of Trade. He focuses on fixed income markets and term structure theory, derivative markets and valuation theory, credit risk, computational finance, liquidity, and the role of arbitrage in financial markets. He has published nearly 70 articles in academic and practitioner journals and is a frequent speaker at conferences. Professor Longstaff has consulted for mutual funds, hedge funds, commercial banks, and other financial institutions; software developers; and risk management firms. Professor Longstaff holds a PhD in finance from the University of Chicago and an MBA from the University of Utah. He is a certified public accountant (CPA) and chartered financial analyst (CFA^®).

Gerard O’Reilly serves as Co-Chief Executive Officer and Chief Investment Officer of Dimensional Fund Advisors LP and is a Dimensional Director. He was named Co-CEO in 2017 and has been with Dimensional since 2004. Along with Co-CEO Dave Butler, Gerard guides the firm’s vision and strategy through daily oversight of the company’s people and processes.

Since joining the firm, Gerard has been instrumental in the evolution of Dimensional’s systematic approach to creating and implementing investment solutions. He was formerly Head of Research, managing the firm’s rigorous, scientific approach to interpreting, testing, and applying research in portfolios. He is a member of the firm’s Investment Research Committee, which reviews potential investment strategy enhancements, and a member of the Investment Committee, which oversees portfolio and account management. He also serves on the Boards of Dimensional’s US mutual funds and exchange-traded funds.

Prior to joining Dimensional, Gerard obtained his PhD in aeronautics from the California Institute of Technology. He holds a master of science degree in high performance computing from Trinity College Dublin in his native country of Ireland, where he also received a first class honors degree in theoretical physics and was a recipient of the Foundation Scholarship.

Abbie J. Smith is the Boris and Irene Stern Distinguished Service Professor of Accounting at the University of Chicago Booth School of Business. She has taught and conducted research in financial reporting, corporate governance, and capital markets since joining Chicago's faculty in 1980 following completion of her PhD at Cornell University. She received the McKinsey Award for Excellence in Teaching in 1990. She is a coeditor of the Journal of Accounting Research, an independent director of Dimensional's US mutual fund board, and a director of Chicago-based UBS Funds, HNI Corp., and Ryder System, Inc.

Heather E. Tookes is an independent director on the Boards for Dimensional’s US mutual funds and exchange-traded funds. She is a Professor of Finance at the Yale School of Management. Her research lies at the intersection of capital markets and corporate finance. She has a particular interest in credit default swaps, convertible bond markets, and trader borrowing. Professor Tookes is a member of the FINRA Economic Advisory Committee, Academic Female Finance Committee (AFFECT) of the American Finance Association, and Committee on Racial Diversity (CORD) of the American Finance Association. She is a former associate editor at the Review of Financial Studies and Management Science and a member of the Federal Reserve Bank of New York’s Financial Advisory Roundtable. Professor Tookes serves on the Board of Trustees of the Berkeley Divinity School at Yale and the Investment Committee of the Community Foundation for Greater New Haven. She earned a PhD in finance from Cornell University and a BA in economics from Brown University.

Ingrid M. Werner is the Martin and Andrew Murrer Professor in Finance at Ohio State University’s Fisher College of Business. Professor Werner is currently President of the Western Finance Association and a Director of the American Finance Association, and she is a Past President of the European Finance Association. Professor Werner is an Independent Director of the Fourth Swedish National Pension Fund and a member of the FINRA Economic Advisory Committee. She serves on the prize committee for the Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel. She chairs the scientific advisory board of the Swedish House of Finance, and serves on the board of Mistra Financial Systems and the scientific advisory board of the Danish Finance Institute. Professor Werner has a PhD in Economics from the University of Rochester and an Honorary Doctorate in Economics from Stockholm School of Economics.