Kinda, but it's complicated. The share price is the number that people will buy and sell as many shares are as actually getting traded, but once you get to significant fractions of the whole company, the marginal cost of the next share can diverge wildly — if one party is trying to get all of them, that may drive up the price a bit, and for any given fraction of ownership there's always someone who sees the share price go up and thinks "hey, I can get even more profit if I hold on for a bit longer!"