    Sentence 1: The Securities and  Exchange Commission yesterday said  companies trading on the biggest US.  markets must win shareholder  agproval before granting stock  options and other stock-based  compensation plans to corporate  executives .    Sentence 2; Companies trading on the  biggest stock markets must get  shareholder approval before granting  tock options and other equi  “compensation under rules cleared  yesterday by the Securities and  Exchange Commission .        