As Lead Director of the Board, Mr. del Valle Perochena presides over executive sessions of the non-management and independent directors of the Board of Directors.

Stockholders and interested parties may contact the Board or any committee of the Board about governance-related and executive compensation matters, or other matters specific to the Board’s oversight responsibilities. Written correspondence may be directed to the Board at Byline Bancorp, Inc., Attention: Corporate Secretary, 180 North LaSalle Street, Suite 300, Chicago, Illinois 60601. Inquiries from stockholders or interested parties directed to the Board will be received and processed by the Corporate Secretary before being forwarded to the Board, the appropriate Committee or a particular director as designated in the communication.