Lock-In Period in IPOs: What Happens When It Ends?
The lock-in period in IPOs determines when certain shareholders can sell their shares. This guide explains what the lock-in period means in NEPSE, why it exists, and how its expiry can impact stock prices.

1. Introduction: Why the Lock-In Period Matters
When a company goes public in NEPSE through an IPO, not all shareholders can sell their shares immediately. The lock-in period is a predetermined time during which certain shareholders—usually promoters, employees, or early investors—are restricted from selling their shares.
When this period ends, a large volume of shares may become available for trading, often influencing the stock’s price.
2. What Is the Lock-In Period?
The lock-in period is the duration after an IPO during which some shareholders are prohibited from selling their shares in the open market.
In NEPSE, SEBON (Securities Board of Nepal) sets lock-in guidelines to:
Ensure price stability after listing
Prevent massive sell-offs from insiders
Build investor confidence in the newly listed company
3. Who Is Affected by the Lock-In Period?
Typically, these groups have lock-in restrictions:
Promoter Shareholders – Often locked for 1–3 years
Employees (ESOP shares) – Usually locked for 1 year
Institutional Investors – May have shorter or custom lock-in terms depending on agreements
Anchor Investors – Sometimes locked for a few months post-IPO
4. Lock-In Period Rules in NEPSE
According to SEBON regulations:
Promoter shares are locked for at least 3 years in most cases.
In hydropower IPOs, promoters often have a 1-year lock-in from the listing date.
Employee quota shares typically have a 1-year lock-in.
Public issue shares for general investors usually have no lock-in (can sell after listing).
5. Why Lock-In Periods Exist
Price Stability – Prevents promoters from cashing out immediately.
Investor Confidence – Shows promoters are committed to the company’s long-term growth.
Regulatory Compliance – Meets SEBON’s listing rules for fair trading.
6. What Happens When the Lock-In Ends?
When the lock-in expires:
A large number of shares may flood the market.
If many insiders sell, supply increases → possible price drop.
If insiders hold, it signals confidence, which may stabilize or boost the price.
7. How the End of Lock-In Impacts Stock Prices in NEPSE
7.1. Price Drop Scenario
Large promoter selling after lock-in expiry can push prices down sharply.
Common in overvalued IPO stocks.
7.2. Price Stability Scenario
If promoters don’t sell or sell gradually, the market absorbs the shares smoothly.
7.3. Price Rally Scenario
Rare, but if the company announces positive news at lock-in expiry, demand may rise.
8. Case Studies in NEPSE
Example 1: Hydropower Company
Lock-in expiry led to a 15% drop in 2 weeks as promoters sold aggressively.
Example 2: Banking Sector IPO
Lock-in ended, but no major selling → price remained stable and later rallied 8%.
9. How to Track Lock-In Expiry Dates
NEPSE Announcements – Check company notices for lock-in expiry schedules.
SEBON Prospectus – IPO documents list lock-in terms.
Media Reports – Financial portals like Nepalytix provide reminders and analysis.
10. Investor Strategies for Lock-In Expiry
✅ Before Expiry:
Watch for insider trading activity (buying or selling in advance).
Assess current market sentiment towards the stock.
✅ On Expiry:
Expect higher volatility.
Avoid panic selling without assessing fundamentals.
✅ After Expiry:
If the stock drops due to temporary selling pressure, it may be a buying opportunity.
11. Common Mistakes Investors Make
❌ Selling immediately without checking fundamentals.
❌ Ignoring the fact that some lock-in expiries have minimal impact.
❌ Buying just before expiry expecting a rally—high risk.
12. Combining Lock-In Analysis with Other Factors
Lock-in expiry analysis works best when combined with:
Earnings Reports – Strong results can offset selling pressure.
Sector Performance – A bullish sector can absorb extra supply.
Technical Indicators – Support and resistance levels help in timing trades.
13. 2025 Outlook for Lock-In Expiries in NEPSE
Expect multiple hydropower and microfinance companies’ promoter shares to unlock.
High retail participation may cushion price drops in strong companies.
Weak fundamentals will likely see sharper corrections.
14. Final Checklist for Lock-In Analysis
Step | Question | Action |
|---|---|---|
1 | When is the expiry date? | Mark it in your calendar |
2 | How many shares will be unlocked? | Compare to daily turnover |
3 | Are insiders likely to sell? | Check past behavior |
4 | Is market sentiment positive? | Yes → Lower risk |
Conclusion
The lock-in period in IPOs is more than just a regulatory rule—it’s a key event that can significantly affect a stock’s price. For NEPSE investors, understanding lock-in terms and preparing for expiry dates can help avoid panic moves and even create profitable opportunities.
Smart investors track lock-in schedules, study company fundamentals, and wait for the right entry point instead of reacting emotionally.
💡 Pro Tip: Use Nepalytix’s IPO Lock-In Tracker to get alerts before promoter share unlock dates so you can prepare your trading strategy in advance.