Mayim Bialik won 0 Primetime Emmy Awards for playing Amy Farrah Fowler. She received four consecutive nominations for Outstanding Supporting Actress in a Comedy Series, but did not win the category during her run on The Big Bang Theory.
Bialik joined the sitcom as Amy in 2010, first appearing as a potential match for Sheldon Cooper. Amy began as Sheldon's unusual scientific friend and gradually became his romantic partner, wife, and fellow Nobel Prize winner in the series finale. Bialik's performance was especially recognized for showing Amy's evolution from socially awkward neuroscientist to a more emotionally confident member of the group.
The number is easy to misremember because Bialik won other honors for the role, including Critics' Choice Television Awards in 2016 and 2018. She was also nominated for the Primetime Emmy four times, in awards cycles spanning 2012 through 2015. Those nominations are not Emmy victories, so the correct total remains zero.