Crain¡¯s annual list brings you the headliners, behind-the-scenes heroes, new faces and emerging stars of Chicago tech you need to know now. Presented here in alphabetical order, they¡¯re the CEOs, entrepreneurs, technologists, dealmakers, researchers and support players who make things go. Wondering where all the other big names are? Find them in our archive of previous Tech 50 lists. This is our ninth edition. We remake the list each year to keep it fresh and to keep up with the growing Chicago tech community.

By John Pletz