the primary Twitter lock-up expires early May (around May 6 i think), ie 180 days after IPO. They could still file for a secondary ahead of that to smooth the transition to a full free float, though obviously the market not as conducive to that as it was a few weeks back. there was an earlier, smaller lock-up expiry in February but this is the big one i believe.

On Twitter (TWTR) - If you're looking for a stock to short then Twitter seems to be one that should be on trader's radar right now -

You would think tho that twitter would deliver a good first set of earnings whenever it reports in the coming weeks (such a textbook ipo unlike facebook) am surprised also they haven't filed for a secondary that would allow them to smooth a little the transition to a full free float - more generally the tech sector has disappointed a bit on earnings in previous quarters (more accurately their sales numbers) so I guess that is why the sell off is happening now

On Twitter (TWTR) - If you're looking for a stock to short then Twitter seems to be one that should be on trader's radar right now -