Is it permissible to buy company shares for the purpose of speculation and earning profits from their price increase, or must the intention behind the purchase be to obtain annual dividends from the company?

It is permissible to buy shares with the intention of obtaining annual profits, and to sell them when their price rises, even if it is before a year. A condition for the permissibility of trading shares is that they must not be in usurious banks or deal with forbidden commodities. In addition to that, the company must not deposit a portion of its funds in usurious banks and receive interest on them, because this introduces usury to all shareholders.