UKG

On February 20, 2020, Ultimate Software and Kronos Incorporated announced an agreement to form a new cloud computing venture, specializing in workforce management and human capital management. The combined company, valued at $22 billion, would be one of the largest cloud computing companies in the world. The merger was officially completed on April 1, 2020,^[3][4][5] and, in August, the company's name was announced as Ultimate Kronos Group (UKG), which became effective on October 1.^[6] According to Society for Human Resource Management, the new company became one of the largest HR technology vendors in the highly competitive economy section that includes ADP, Ceridian, Taleo, Successfactors, Zoho Corporation and Workday.^[7][8]

In December 2021, UKG disclosed that it was targeted by a ransomware attack that was first detected on December 11, 2021. The malware attack affected the Kronos Private Cloud feature used by many large businesses including Boots, Gap Inc., Marriott International, MGM Resorts International, PepsiCo, Sainsbury's, Samsung, Staples Inc., Tesla, Inc., Whole Foods Market, Yamaha Corporation, YMCA, and others while some governmental entities such as the cities of Cleveland, Springfield, Massachusetts as well as the New York Metropolitan Transportation Authority were also affected.^{[9][10][11][12][13]} Many sources reported that the attack possibly occurred as a result of the Log4Shell zero-day, but UKG claimed it had no evidence that Log4Shell was responsible for the ransomware incident.^{[13][14][11][9]}

In July 2024, Jennifer Morgan became chief executive officer.^[15]

Workforce—Institute and Activity Report

Established in 2007, Workforce Institute is the company's think tank and research platform for organizations providing information on Human Capital Management issues, including working environment optimization, analytical and educational tools, accommodation of people with disabilities, and more. The organization also conducts surveys and issues annual reports on global workforce trends and developments.^{[16][17][18][19]}

The Workforce Activity Report is an index that analyzes shift work trends from over four million people across more than 35,000 U.S. businesses. Reports are published, and briefings are held each Tuesday before the Bureau of Labor Statistics Employment Situation Report is published. The Report is widely covered by news organizations and government sources.^[20][21][22]

Private equity firm Hellman & Friedman, which was the controlling shareholder of both Ultimate and Kronos, is the controlling shareholder of UKG.^[33] Blackstone, which also owned stakes in both previous companies, is the largest minority investor holding a 20–25 per cent stake.^{[2][34][better source needed]} Other minority investors include GIC, Canada Pension Plan Investment Board, and JMI Equity.^{[35][better source needed]}

• UKG Pro Suite^[36]
• UKG Ready Suite^[36]
• UKG HR Service Delivery^[36]
• UKG Virtual Roster^{[citation needed]}
• UKG OneView^{[citation needed]}

• America's Greatest Workplaces 2023, Newsweek^[37]
• America's Most Innovative Companies 2023, Fortune^[38]
• America's Best Large Employers 2024, Forbes^[39]
• America's Best Employers for Tech Workers 2025, Forbes^[40]