What Is a SPAC Lock-Up Expiration?

When insider shares unlock and supply hits the float — calendared, sized, and tradeable.

A SPAC lock-up expiration is the date on which previously restricted shareholders — sponsors, target-company insiders, and PIPE investors — are first able to sell shares of the merged company in the open market. The dates are written into the merger documentation, the share counts are disclosed, and the resulting supply events are among the most predictable structural catalysts in the small-cap landscape.

The standard structure

A typical de-SPAC includes lock-ups for three distinct groups:

• Sponsor / founder lock-up. Sponsors are typically locked up for 12 months post-merger, with early-release triggers if the stock trades above defined price thresholds (commonly $12 for 20 of 30 trading days).
• Target-company insider lock-up. Founders, officers, and significant pre-merger shareholders of the operating company are typically locked up for 6–12 months post-merger.
• PIPE investor lock-up. If any. Many PIPE investors negotiate short lock-ups (30–90 days) or none at all.

The terms are specific to each merger. The relevant documents are the business combination agreement and the lock-up agreements filed as exhibits to the DEFM14A or 8-K.

What "expiration" actually means

An expiration is when the contractual restriction lapses — not when the shareholder is required to sell. Expirations create the option to sell. Empirically, a meaningful share of locked-up shareholders begins selling promptly upon expiration, but the pace and magnitude vary by holder type:

• Sponsors typically distribute over weeks to months. They held founder shares at near-zero cost basis and have strong incentive to monetize.
• Target-company insiders are heterogeneous — some hold long-term, some distribute quickly. Concentration on a few large holders increases the likelihood of meaningful supply.
• PIPE investors are most likely to be event-driven funds with short holding periods. Distribution starts immediately on expiration.

Early-release triggers

Most sponsor lock-ups include early-release provisions tied to the post-merger stock price. The standard formulation:

"The sponsor's lock-up will terminate on the earlier of (a) 12 months after the closing of the business combination and (b) the date on which the closing price of the company's common stock equals or exceeds $12.00 per share for any 20 trading days within any 30-trading-day period commencing at least 150 days after the closing of the business combination."

The practical effect: if the stock rallies above $12 in the first year, the lock-up can release months early. This is one reason de-SPAC rallies can stall around the $12 mark.

How to size the supply event

The relevant calculation:

1. Locked-up share count by holder group from the merger documentation.
2. Compare to public float at expiration. Locked-up shares are typically several multiples of float — sometimes 10x or more.
3. Estimate the probable distribution rate by holder type. Sponsors generally distribute faster than target-company insiders.
4. Map to days-of-volume. Convert estimated incremental selling to days of average volume to gauge the absorption pressure.

Why expirations get traded

The combination of predictable timing and large supply relative to float makes lock-up expirations one of the cleaner mechanical setups in event-driven research. Empirically, post-merger stocks tend to trade weak in the windows immediately preceding and following major lock-up expirations.

That said, several caveats:

• The market knows. Front-running of expirations is meaningful. Much of the price action happens before the expiration date itself.
• Squeeze risk. Heavy pre-expiration shorting can produce sharp covers if the lock-up extends or holders refuse to distribute.
• Borrow availability. De-SPAC names frequently have constrained borrow — see what is a hard-to-borrow stock.

Reading the actual terms

The lock-up provisions are in the lock-up agreement, filed as an exhibit to the merger documentation or to the post-merger 8-K. The provisions to extract:

• Locked-up shareholders and their share counts
• Lock-up period (typically expressed in days from closing)
• Early-release triggers (price thresholds, trading-day counts, observation windows)
• Permitted transfers (typically estate planning, charitable, by operation of law)
• Waiver mechanisms (often allow the underwriter or company to release shares early at its discretion)

Related reading

What is a de-SPAC; how to build a lock-up expiration calendar; how to track lock-up expirations from S-1 filings; short-selling de-SPACs.

Where Alphanume fits

Alphanume's Dilution Events dataset parses lock-up terms from merger documentation and produces a calendar of upcoming lock-up expirations per issuer, with locked-up share counts and early-release triggers. The calendar view replaces hand-extracting terms from each merger.

Explore the Dilution Events dataset →