Would Mormons own Kroger grocery?
Would they? Sure, why not? Mormons (individuals, not the church as a whole) own many different kinds of businesses, including grocery stores. The church as a whole, however, would not. The church doesn't own and for-profit retail outlets, all it's for-profit ventures are in real estate and media. Distribution of foods and goods is done through charity work through church-owned thrift stores (Deseret Industries) and food banks (Bishop Storehouses). Do they? No.
Do Mormons get their own planet if they have 9 or more kids?
Mormons do not believe that quantity of kids has anything to do with salvation. Mormons have more than the average amount of kids because they believe in family. Mormons believe salvation consists of receving all that God has. The idea of Mormons receiving their own planet is a bit of saracsm that is pushed by those who do not like the church.
Do the Mormons own Fred Meyer?
No. The Church of Jesus Christ of Latter-day Saints (the "Mormon" church) does not own any retail stores aside from Deseret Book, a religious book and gift store. Fred Meyer was originally started by a man named Fred Meyer in 1922. He was not a Mormon. In 1998, the store merged with Kroger, which is publically traded and therefore owned by shareholders.