That would prevent insiders and common shareholders from selling their shares, but it would in no way prevent an investment bank from unloading their shares through some sort of intermediary.
Morgan Stanley & Co. Incorporated may, in its sole discretion, release all or some portion of the shares subject to lock-up agreements prior to expiration of the lock-up period.
They probably are, but what I mean is they could use some 3rd party to short their own shares. We're talking about people that can rob the US government of a trillion dollars in plain sight.
Through an under the table deal with any hedge fund, or any number of other means, an investment bank that owns LinkedIn shares could quite easily insure their profits. That is exactly what these businesses do.
