Four grocers made Fortune’s “100 Best Companies to Work For” list for 2012, with Wegmans Food Markets ranking highest at No. 4.

Fortune partners with the Great Place to Work^® Institute to produce the annual list, which is based on employee surveys that gauge worker attitudes about management’s credibility, job satisfaction, camaraderie, pay and benefit programs, hiring, communication, training, recognition programs and diversity. 

Here are the rankings for the supermarkets on the list and comments from Fortune:

No. 4: Wegmans Food Markets; Rochester, N.Y.
Previous rank: 3
“The family-owned grocery chain has made employee health a religion: More than 2,000 workers have enrolled in a free smoking-cessation program since 2009; this year it opened a new 24/7 health hotline.”

No. 32: Whole Foods Market; Austin, Texas.
Previous rank: 24
“Occupy protesters might look kindly at the nation’s biggest natural-foods grocer, since it caps salaries of executives at 19 times the average full-time salary. Co-founder John Mackey’s 2006 pay reduction to $1 a year is still in effect.”

No. 34: Nugget Market; Woodland, Calif.
Previous rank: 8
“Checkers earn an average of $17.71 an hour at this regional market where employees cite the close-knit family feel as reason they look forward to going to work. Still, it saw its ranking drop this year driven by a decline in employee survey scores.”

No. 78: Publix Super Markets; Lakeland, Fla.
Previous rank: 67
“The country’s fourth-largest grocer is also the largest employee-owned company in the nation. Employees get generous annual stock infusions.”