SHARE-SUPPLY IMPACT
IPO Lock-Up Expiration and Share-Supply Calendar
Understand IPO lock-up expiration dates, staged share releases, float expansion and how many average trading days may be needed to absorb new supply.Updated 2026-08-24 · Evidence-led methodologyWhy is an IPO lock-up date more useful when linked to share supply?
A date alone does not measure selling pressure. A useful lock-up analysis connects each release date to the number of newly tradable shares, the percentage increase in float, the holder group and any conditions that can accelerate or delay the release.
WHAT TO CHECK
Three checks that turn filing data into an investment conclusion
- 01
Actual release date
Convert relative terms such as 180 days after closing into a calendar date once the IPO closing date is confirmed.
- 02
Incremental and cumulative supply
Show both the shares released in each tranche and the cumulative tradable float after the tranche.
- 03
Absorption capacity
After sufficient trading history exists, compare the released shares with 20-day average daily volume.
EVIDENCE BASIS
Use the filing, not an unsupported estimate.
If a required figure is not published, IPO177 identifies the missing source instead of substituting a fabricated value.
- Lock-up agreement
- Underwriting agreement
- Registration-rights terms
- Actual listing and closing dates