For a 12th year, Working Mother magazine has named Principal Financial Group Inc. as one of the "Working Mother 100 Best Companies." The award recognizes the companies' commitment to progressive workplace programs, including child care, flexibility, advancement and paid family leave. This year, Working Mother has launched a national initiative to encourage greater workplace flexibility with a National Flex Day set for Oct. 15. Principal said it will demonstrate its support of the initiative by encouraging its employees to take advantage of its comprehensive flexible work arrangement policies and will also share the official National Flex Day badge on its website and display the National Flex Day poster in its offices. To see the list of the top 100 companies, click here.