Todd Trubey

Vice President, Portfolio Strategies

Todd joined Ariel in 2007 as vice president of portfolio strategies. In this capacity, he is responsible for the firm’s peer analysis and competitive research. He also 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 a master’s and PhD in English from Northwestern University.

Jason J. Tyler

Senior Vice President

Director of Research Operations

Jason specializes in the financial services and infrastructure industries. He also serves as the Investment Team’s liaison with institutional clients and oversees the restrictions monitoring process as well as the department’s broker and vendor relationships. A former Ariel research intern, Jason re-joined Ariel in 2003 after spending ten years at Bank One/American National Bank in various roles, most recently as a manager in the Planning and Analysis Group. Outside of Ariel, Jason serves as non-executive Chairman of the board of First Chicago Bank & Trust. He is also a board member of the Children’s Defense Fund and the Chicago Alliance to End Homelessness. Additionally, he is a director and serves as treasurer for the board of the Joffrey Ballet. In 2009, Jason was named a Business Leader of Color by Chicago United for his professional achievements and commitment to public service. Jason received his MBA from the University of Chicago and his AB in politics from Princeton University.

Sabrina Carollo, CFA^®

Vice President, Research

Sabrina specializes in health care as well as the office supplies industries. 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.

John P. Miller, CFA^®

Senior Vice President

Portfolio Manager

Ariel Fund, Ariel Small and Small/Mid Cap Value Products

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. on stock selection for Ariel Fund as well as the firm’s 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 in Cantor Fitzgerald & Co.’s 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 his MBA from the University of Chicago and received a BB in management from Western Illinois University.