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What is the lock-in period in IPOs?

3 min read
Mar 16, 2026
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An IPO lock-in period or initial public offering (IPO) is like baking a cake and letting it cool before slicing. This lock-in period ensures the stock market remains stable, giving the company’s value time to settle naturally.

During this waiting phase, investors must resist the urge to act, trusting that patience will yield better results. Once the lock-in ends, you’re free to enjoy the benefits.

What is the lock-in period in an IPO?

When a company goes public through an IPO, some shareholders cannot sell their shares right away. This rule is called the IPO lock-in period. It helps keep the stock price stable and protects new investors like you from sudden market swings.

The lock-in period for IPO stops early investors from quickly selling their shares and flooding the market, giving the company a chance to settle its stock price after listing. These IPO lock-in period rules are part of broader regulatory safeguards designed to maintain fairness in markets.

The IPO shares' lock-in period is not the same for everyone. It depends on the type of investor. Retail investors, pre-IPO investors, and promoters all face different lock-in rules, often referred to as IPO shareholding restrictions.

It usually applies to:

  • Promoters (founders and key managers)
  • Company executives
  • Employees with stock options
  • Anchor investors who bought shares before the IPO

These categories are governed by SEBI IPO lock-in guidelines.

Types of lock-in period

The different types of lock-in period include:

    1. Promoter Lock-In Period

    • Minimum Promoter Contribution (MPC): The lock-in period for the minimum promoter contribution remains 3 years from the date of IPO allotment. These Promoter lock-in regulations ensure that founders remain committed to the company’s long-term growth.
    • Excess Promoter Holding: For promoter holdings exceeding the MPC, the lock-in period is 2 years for 50% of the excess shares and 1 year for the remaining 50%.

    2. Anchor Investor Lock-In Period

    • 50% of Allotted Shares: Locked in for 90 days from the allotment date.
    • Remaining 50%: Locked in for 30 days from the allotment date.
    • These timelines define the Lock-in period for anchor investors, helping prevent sudden bulk selling post listing.

    3. Non-Promoter Lock-In Period

    • Non-promoter investors now face a 6-month lock-in period, reduced from the previous 1-year requirement. These are part of broader Post-IPO share selling restrictions aimed at ensuring an orderly transition into trading.

Reasons for imposing an IPO Lock-in period

An IPO lock-in period may be imposed due to any of the following reasons:

    1. Market stability: The primary purpose is to prevent dramatic price fluctuations immediately after listing. A sudden influx of shares from insiders could flood the market and drive prices down sharply. It ensures a gradual release of shares into the market, allowing investors to adjust over time.

    2. Investor confidence: The lock-in demonstrates that key stakeholders remain invested in the company's long-term success, providing reassurance to new public investors. When insiders hold onto their shares, it signals belief in the company’s growth potential.

    3. Price discovery: By limiting the supply of available shares initially, the market can establish a fair valuation based on public demand without interference from insider selling. This leads to more accurate and transparent pricing that reflects actual investor interest. An uninterrupted price discovery process reduces the risk of mispricing during early trades.

    4. Management commitment: The lock-in period for IPO ensures that company leadership remains focused on operational performance rather than immediate share price movements. It prevents distraction by discouraging short-term stock liquidation by the leadership team.

    5. Regulatory compliance: These restrictions align with regulatory objectives of maintaining orderly markets and protecting retail investors during the sensitive post-IPO phase. It safeguards retail investors from potential manipulation by early insiders. Such rules promote a level playing field and encourage wider investor participation.

Without these restrictions, insiders with significant holdings could potentially undermine market confidence by exiting their positions too quickly after the company goes public.

Importance of IPO Lock-in period for investors

The IPO lock-in period for investors is important because of:

    1. Price impact awareness: When the IPO lock-in period expires, the potential increase in share supply can lead to price declines. Investors monitor these expiration dates to anticipate possible market movements and understand the Investor lock-in period impact on stock prices.

    2. Investment timing strategy: Some investors deliberately wait until after the IPO shares lock-in period expires before investing, hoping to purchase shares at lower prices if inside lock-ins sell.

    3. False demand indicators: During the IPO lock-in period, restricted share availability can create an artificial sense of demand and scarcity that may not reflect the long-term market sentiment.

    4. Volatility preparation: The end of the IPO lock-in period often coincides with increased price volatility as the market absorbs newly available shares.

Also Read: IPO grading

Conclusion

The IPO lock-in period helps protect new investors and maintain stable stock prices by preventing insiders from selling too quickly. However, you should watch for the end of the lock-in period, as it can lead to price changes. Additionally, understanding the company's growth prospects and financial health will ultimately guide us to make smarter investment choices.

Axis Bank's IPOSmart is an online platform that simplifies IPO investments for retail investors. It allows you to apply for IPOs directly through Internet Banking, with a one-time registration process for your PAN and Demat details.

The platform uses the ASBA (Application Supported by Blocked Amount) system, which blocks funds only when shares are allotted and unblocks them if not. This eliminates the need to pay up front and ensures easy, secure transactions. IPOSmart also offers a seamless and convenient process for applying to multiple IPOs without the hassle of physical paperwork or in-person visits.

Frequently Asked Questions

What is the lock-in period of an IPO?

The lock-in period in an IPO lock-in period refers to the timeframe during which you can withdraw your application after submitting it. In India, this period typically lasts 1-2 days before the IPO closes. It's designed to give you, as an investor, the time to reconsider your decision based on new information or changing market conditions.

How long is the Lock-in period after the IPO?

The IPO lock-in period duration varies by investor category. For promoters, it's typically 18 months for up to 20% of holdings and 6 months for the rest of the investment. Anchor investors face a 90-day restriction on 50% of their shares and 30 days for the other 50%. Non-promoter pre-IPO investors generally have a 6-month lock-in period.

Disclaimer: This article is intended solely for informational purposes. The views expressed in this article are personal. Axis Bank and/or the author shall not be liable for any direct or indirect loss or liability incurred by the reader arising from reliance on the content herein. Readers are advised to consult a qualified financial advisor before making any financial decisions. Axis Bank does not endorse or guarantee the accuracy of any third-party content or links included in this article.

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