Domestic Senior Research Team

John W. Rogers, Jr.

Chairman, CEO & Chief Investment Officer
Lead Portfolio Manager
Ariel Small and Small/Mid Cap Value Products and Ariel Fund
Co-Portfolio Manager
Ariel Mid Cap Value Product and Ariel Appreciation Fund
John’s passion for investing started when he was 12 years old when his father bought him stocks every birthday and every Christmas instead of toys. His interest grew while majoring in economics at Princeton University. After graduation, he worked as a stockbroker for 2½ years at William Blair & Company, LLC—a regional investment banking firm. In 1983, John founded Ariel Investments to focus on undervalued small and medium-sized companies. Patience served as the cornerstone of a disciplined approach that still drives the firm today. Beyond Ariel, John is a regular financial contributor to Forbes Magazine and currently serves as a board member of Exelon Corporation and McDonald’s Corporation. Additionally, he is a trustee of both the Nathan Cummings Foundation and the University of Chicago, where he chairs the board of the University of Chicago Laboratory School. John is also a director of the Robert F. Kennedy Center for Justice and Human Rights.  In 2008, he was awarded Princeton University’s highest honor, the Woodrow Wilson Award, presented each year to the alumnus whose career embodies a commitment to national service. Following the election of President Barack Obama, John served as co-chair for the Presidential Inaugural Committee 2009. In 2013, he was featured alongside legendary investors Warren Buffett, Sir John Templeton and Benjamin Graham in the distinguished book: The World’s 99 Greatest Investors by Magnus Angenfelt. John received an AB in economics from Princeton University where he was also captain of the varsity basketball team. 

Charles K. Bobrinskoy

Vice Chairman, Director of Research
Portfolio Manager
Ariel Focus Fund and Ariel Focused Value Product
Charlie manages Ariel’s investment team and serves as the firm’s director of research. Additionally, he is portfolio manager of our focused value strategies—concentrated portfolios investing in companies across all market capitalization ranges. Charlie brings more than two decades of investment experience to the firm. Prior to joining Ariel in 2004, he spent 21 years as an investment banker at Salomon Brothers and its successor company, Citigroup, where he held many leadership positions, most recently managing director and head of North American Investment Banking Branch Offices. Beyond Ariel, Charlie is active in the Chicago community, teaching monthly investing classes at two Chicago inner-city schools as well as serving on the boards of the Museum of Science and Industry, La Rabida Children’s Foundation and the Big Shoulders Fund. He is also a director for InnerWorkings, Inc., a publicly traded print procurement company. Charlie graduated from Duke University with an AB in economics and earned an MBA from the University of Chicago.
Sabrina Carollo, CFA

Sabrina Carollo, CFA®

Senior Vice President
Director of Research Operations
Sabrina specializes in health care as well as the office supplies industries. She also oversees the department’s broker relationships. Prior to joining Ariel in 2001, she spent seven years at William Blair & Company, LLC, over half of that time as a research associate. Sabrina is a member of the CFA Institute and the CFA Society of Chicago. She is also a member of Rush University Medical Center’s Associates Board and an active volunteer at Erickson Elementary School on its Safety and Improvement Committee. Sabrina graduated from Ball State University with a BA in accounting.

Timothy Fidler, CFA® 

Senior Vice President
Co-Portfolio Manager
Ariel Appreciation Fund and Ariel Mid Cap Value Product
As co-portfolio manager for our mid cap value strategy, Tim works side-by-side with John W. Rogers, Jr. Tim is also responsible for the firm’s proprietary research in the financial services industry. In 2008, Institutional Investor magazine recognized him as one of 20 rising stars within the industry. In 2007, he graduated from the Fellowship Program of Leadership Greater Chicago, an initiative which educates and connects emerging leaders to support and strengthen the Chicago region. Prior to joining Ariel in 1999, he worked at Morgan Stanley in the asset management area of the firm as a research analyst and portfolio manager working on the firm’s U.S. value management teams. Tim graduated Phi Beta Kappa from Northwestern University with a BA with honors distinction and earned his MBA with high honors from the University of Chicago.

Kenneth E. Kuhrt, CPA

Senior Vice President
Portfolio Manager
Ariel Micro, Small and Small/Mid Cap Value Products, Ariel Fund and Ariel Discovery Fund
As portfolio manager for our micro and small cap deep value strategies, Ken works side-by-side with lead portfolio manager David Maley on stock selection. He serves in the same capacity for our small and small/mid cap value products with lead portfolio manager John W. Rogers, Jr. and fellow portfolio manager John Miller. Additionally, Ken serves as an industry specialist covering consumer services and industrial companies. He joined Ariel as a research analyst in 2004. Prior to Ariel, Ken spent more than two years with William Blair & Company, LLC, most recently as a senior investment banking analyst. He also worked as a senior auditor at KPMG, LLP. Ken received a BS in accountancy from the University of Illinois at Urbana-Champaign and an MBA from the University of Chicago. Ken is also a Certified Public Accountant.
David Maley

David M. Maley

Senior Vice President
Lead Portfolio Manager
Ariel Discovery Fund and Ariel Micro-Cap Value Product
David is lead portfolio manager for our micro and small cap deep value strategies. Additionally, he manages the firm’s domestic trading team and chairs Ariel’s trade oversight committee. He joined the firm in April 2009 bringing an impressive track record in the micro-cap value space, as well as 25 years of investment experience. Prior to Ariel, David ran Maple Hill Capital Management. David began his investment career at Goldman Sachs where he rose to vice president. He later joined Harris Bank as a vice president and senior portfolio manager. David serves on the board of directors and finance committee of the Joseph Maley Foundation. He earned a BBA in finance with high honors from the University of Notre Dame and an MBA from the University of Chicago.
John P. Miller, CFA

John P. Miller, CFA®

Senior Vice President
Portfolio Manager
Ariel Small and Small/Mid Cap Value Products and Ariel Fund
John has served on Ariel’s investment team for over two decades and inherently embodies a strong value discipline. As portfolio manager, he works side-by-side with lead portfolio manager John W. Rogers, Jr. and fellow portfolio manager Kenneth Kuhrt on stock selection for our small and small/mid cap portfolios. Additionally, he oversees the firm’s proprietary research in the asset management and media/entertainment industries. Prior to joining Ariel in 1989, John worked for Cantor Fitzgerald & Co. in its institutional equity division. He is a member of the CFA Institute, the CFA Society of Chicago as well as a board member of Voices for Illinois Children. John earned a Bachelor of Business in management from Western Illinois University and an MBA from the University of Chicago.
Anthony Walker

Anthony T. Walker

Vice President
Anthony joined Ariel’s research department in July 2012 and is responsible for covering the energy and industrial services sectors. He came to Ariel after five years in research at Barclays Capital and Lehman Brothers where he began as an analyst. Following three years of top-tier analyst rankings within the firm, Barclays promoted him in 2010 to assistant vice president of equity research in the oil service and drilling group. Prior to Barclays and Lehman, Anthony served internships with both Lehman Brothers and Morgan Stanley in their equity research and private wealth management groups, respectively. He earned his BA at Columbia University (NY) where he double concentrated in economics and political science.

Todd Trubey

Vice President, Portfolio Strategies
Todd joined Ariel in 2007 and is responsible for the firm’s peer analysis and competitive research, as well as overseeing our Request for Proposal (RFP) process. Furthermore, he works closely with senior management and our investment team on white papers and portfolio commentary. Todd came to Ariel after spending seven years at Morningstar, Inc., a leading source of independent investment research. Most recently, he served as a senior mutual fund analyst specializing in small cap, long-short and Buffett-style funds. Additionally, he spent two years as an editor in the insurance department for Dearborn Financial Publishing, focusing on variable insurance products. Todd graduated summa cum laude with a BA in English from the University of the South. He also holds an MA and PhD in English from Northwestern University.
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