Glassdoor, which allows employees to write reviews about their companies, compiled this year's list by examining factors such as career opportunities, pay and benefits, work culture, and work-life balance.
And this week, Ultimate also was ranked No. 3 on this year's 50 Best Workplaces for Diversity list by Fortune and consultant Great Place to Work.
"We are continuously inspired and encouraged by the positive feedback we receive from our employees through Glassdoor", said David Rice, founder and CEO of New Home Star.
Glassdoor also ranked the top small- and medium-sized companies.
With a 4.6 rating from 975 reviews, the company rose from its number seven spot on last year's list. This is the first time Facebook has topped Glassdoor's list since 2013, beating other tech companies such as Google (GOOG, GOOGL) at No. 5, HubSpot at No. 7, World Wide Technology at No. 8, Ultimate Software (ULTI) at No. 10., Yahoo at No. 65 and VMWare (VMW) at No. 33.
And if that's the case, the employers that just made Glassdoor's 10th annual Employees' Choice Awards, honoring the Best Places to Work in 2018, will be ones to keep an eye on in the next year. To be eligible, companies must have had at least 1,000 employees from Nov 1, 2016 to Oct 22, 2017.
Making its debut in the Glassdoor Employees Choice Awards index the utilities company went straight in at number two in the United Kingdom, only beaten by web giant Google. Working with a builder base that includes some of the largest homebuilders in the USA and Canada, New Home Star recruits, selects and develops sales teams with a full-time focus on new home sales delivering new home sales strategies with a national perspective and a local presence.