NextTrack tracks 3,901 IPO lockup and unlock events, mapping exactly when insider, employee, and pre-IPO investor shares become sellable. Lockup expiry is one of the most watched supply catalysts after an IPO, and NextTrack derives the dates straight from each prospectus so you can see unlocks before they hit.
Tracking 3,901 lockup events. Last updated 2026-07-17.
Lockup periods are extracted from IPO prospectuses (S-1/424B4) and mapped to a calendar of expiry dates, including staged and early-release provisions where the filing specifies them.
An IPO lockup is a period (commonly 90–180 days) after an IPO during which insiders and pre-IPO investors cannot sell. When it expires, that supply becomes sellable, which is often a watched catalyst.
NextTrack tracks 3,901 lockup and unlock events, derived directly from IPO prospectuses.