JOEL - Fanny Alger is the only verified plural wife Joseph Smith had, although there were certainly at least a few others. Records are not clear on the numbers. Claims have been made that Joseph Smith had up to 34 wives, but most of them he was only sealed to, but did not live with in a husband/wife relationship(called theological polyandry).
In fact Joseph was not only sealed to other women, he was also sealed to men as well. Many early Mormons had living parents and spouses who weren't members of the church and consequently were not eligible for sealing blessings. The solution for this was for them(men or women) to be sealed to someone who would most likely gain exaltation, such as the prophet Joseph Smith.

The question about Coke stock is pretty much an urban legend. The church has never purchased stock in Coke. The only possible connection to Coke stock is if or when someone made a donation or paid tithing to the church by transfering shares of their own Coke stock to the Church, which would have immediatly sold them.