Lock-up period

A lock-up period, also known as a lock in, lock out, or locked up period, is a predetermined amount of time following an initial public offering where large shareholders, such as company executives and investors representing considerable ownership, are restricted from selling their shares. Generally, a lock-up period is a condition of exercising an employee stock option. Depending on the company, the IPO lock-up period typically lasts between 90 and 180 days before these shareholders are allowed the right, but not the obligation, to exercise the option.

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