UKG (Ultimate Kronos Group) is a major national HCM and payroll platform formed in April 2020 through the $22 billion merger of Ultimate Software (founded 1990 in Weston, FL by Scott Scherr) and Kronos Incorporated (founded 1977 in Lowell, MA by Mark S. Ain). UKG maintains dual headquarters in Weston, Florida and Lowell, Massachusetts, providing payroll, time and attendance, HR, and workforce management software nationwide.