Fund Structure
Lock-Up Period
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Quick Answer
The post-IPO period (typically 180 days) during which insiders and pre-IPO investors are prohibited from selling their shares.
What it is
A lock-up period is a contractual restriction preventing company insiders (executives, employees, early investors) from selling their shares for a specified time after an IPO — typically 180 days (6 months). Lock-ups exist to prevent a flood of insider selling immediately after IPO that would destabilize the new public stock price. Investment banks underwriting the IPO negotiate lock-ups as part of the offering. When the lock-up expires, insiders can begin selling — this 'lock-up expiration' often creates selling pressure and stock price volatility. VCs with large positions often sell gradually after lock-up expiration using 10b5-1 trading plans to avoid market disruption. In SPAC transactions, lock-ups are often shorter (6 months for sponsors, 1 year for PIPE investors).
In Practice
CloudTech goes public at $20/share with a 180-day lock-up period. Founder Sarah owns 8M shares worth $160M at IPO, but cannot sell during the lock-up. By day 181, the stock has dropped to $12/share, reducing her holdings to $96M — a $64M paper loss. Meanwhile, VC firm TechCapital, which invested $10M for 2M shares pre-IPO, faces the same restriction. Their $40M position at IPO is now worth $24M when the lock-up expires. Both must decide whether to sell immediately for liquidity or hold longer hoping for recovery.
Operational context
What good looks like
The term is tied to a real workflow, not just a definition.
Ownership, timing, and evidence are clear.
The reader can tell what decision the concept supports.
Related terms point to the next useful explanation.
Why It Matters
Lock-up periods create significant risk for founders and early investors who may see their paper wealth fluctuate dramatically while unable to sell. Stock prices often decline during lock-up periods due to anticipated selling pressure, then drop further when restrictions lift. Understanding lock-up mechanics helps stakeholders plan personal liquidity needs and diversification strategies. Some investors negotiate shorter lock-ups or staggered release schedules to mitigate risk, while others use financial instruments to hedge their positions during the restriction period.
VC Beast Take
Lock-up periods are where fortunes are made and lost, yet most founders treat them as an afterthought. The 180-day standard is arbitrary and increasingly outdated in today's volatile markets. We're seeing more sophisticated approaches — staggered releases, performance-based unlocks, and hedging strategies that wealthy insiders use while retail investors remain locked up. The smartest founders negotiate collar structures or partial releases to derisk their positions, because watching your net worth swing $50M while handcuffed is pure torture.
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Comparisons
Frequently Asked Questions
What is Lock-Up Period in venture capital?
A lock-up period is a contractual restriction preventing company insiders (executives, employees, early investors) from selling their shares for a specified time after an IPO — typically 180 days (6 months).
Why is Lock-Up Period important for startups?
Understanding Lock-Up Period is critical for founders navigating the fundraising process. It directly impacts deal terms, valuation, and the relationship between founders and investors.
What category does Lock-Up Period fall under in VC?
Lock-Up Period falls under the fund-structure category in venture capital. This area covers concepts related to how venture capital funds are organized, managed, and governed.
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