Yes, it would be given individually to each Pokemon.
lf you KO a Poliwhirl (2 Speed EVs) your lead Pokemon would get the EVs, and every Pokemon with Exp. Share would get 2 as well.
But this doesn't apply to the Power ltems, like if your lead Pokemon is equipping the Power ltem for speed,
only your lead Pokemon would get 6 (2+4) EVs, while every other Pokemon with Exp. Share would get 2.