Is chick fil a a Mormon company?

No. The Church of Jesus Christ of Latter-day Saints (commonly called the "Mormon" Church) is in no way affiliated with Chick-Fil-A. Chick-Fil-A is owned and was founded by Truett Cathy, who is a member of First Baptist Church in Jonesboro, Georgia. He has taught Sunday School at First Baptist for over 50 years.