HUH? That is not the point. It isn't even a point. The point is that if the company files an S-1, it will be an offering, as the company has in fact said.
Current holders of converted Series D will be the selling shareholders. The float will be "reconstituted" because their shares will be registered in the offering.
That means they'll be free trading upon effectiveness.
But S-1s are examined with attention by the SEC, and normally go through a number of amendments. So don't expect anything to happen anytime soon.