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How IPOs are Allotted When Oversubscribed

Oversubscription occurs when the demand for shares far exceeds the total available shares in the IPO.

In such cases, the registrar ensures a fair and transparent allotment process under SEBI regulations. You may know about the share allotment process in IPOs, which typically favors maximum distribution by allocating at least one lot per successful applicant in the retail category.

How Oversubscribed IPOs are Allotted

Retail Investor IPO Allotment Process

  • All valid retail applications (up to ₹2 lakh) pooled.
  • Each eligible application entered into a computerized lottery.
  • Only the applications at the cut-off price considered, highlighting the importance of cut-off price and bidding in IPO applications.
  • ​Each applicant gets an equal shot applying for more than one lot does not improve odds.
  • Allotment usually limited to one lot per winning applicant.

Other Categories (NII/QIB/Employees) IPO Allotment

  • High Net-Worth Individuals (NII): Allocation is proportionate to the number of shares applied for and the over-subscription ratio, larger applicants may get a fractional allotment.
  • Qualified Institutional Buyers (QIB): Allotment is discretionary and sometimes proportional but not based on lottery.
  • Employees or shareholders: Allocation proportionate or based on specific rules, if their quota oversubscribed, it’s often on a pro-rata basis.​

Final Allotment and Refunds

  • Results published as a basis of allotment document.
  • Successful applicants get shares credited to their demat account and should understand the lock-in period after IPO allotment as per SEBI regulations.
  • Others receive refunds for their blocked amount; you can see how to check your IPO refund status for timely updates.
  • Results published as a basis of allotment document.
  • Successful applicants get shares credited to their demat account.
  • Others receive refunds for their blocked amount.

How to Maximize Chances in Oversubscribed IPOs


Conclusion: When an IPO oversubscribed, the allotment for retail investors relies on a lottery system to ensure equal opportunity, with each valid application entered once and successful applicants receiving one lot only, helping distribute shares fairly, regardless of demand magnitude.

Disclaimer: The content in this page is for educational and informational purposes only and is not financial advice or recommendation. Any reader who acts on the information provided here, does so entirely at their own risk. Please consult a registered financial advisor before making any investment decisions. Investments in IPOs and GMP information carry risks. Invest responsibly. GMP, Kostak, Sauda rates are unofficial grey market indicators valid only for listed date. Subscribe based on fundamentals, not premiums alone.

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