IPO Learning Guide
In an Initial Public Offering (IPO), shares are divided into different investor categories: Qualified Institutional Buyers (QIB), High Net-worth Individuals (HNI/NII), and Retail Individual Investors (RII). Each category has a specific quota, allocation method, and subscription dynamics. Understanding these differences helps investors evaluate allotment chances and demand trends more accurately.
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Retail (RII)
HNI / NII
QIB
IPO allocation in India is divided into structured investor buckets to ensure fair participation across institutional and non-institutional investors. In a typical Mainboard IPO, allocation is generally structured as:
However, in SME IPOs, the structure differs significantly. SME issues often have a much higher Retail allocation and a separate Market Maker portion. Institutional participation may be lower compared to Mainboard IPOs.
Understanding whether an IPO is SME or Mainboard is critical before interpreting subscription data.
Retail investors can apply up to ₹2 lakh in a Mainboard IPO. If the Retail category is oversubscribed, allotment is done via a computerized lottery system.
Example: Suppose Retail quota has 10 lakh shares available and receives applications for 100 lakh shares. That means Retail is subscribed 10x.
If 5 lakh valid retail applications exist and only 1 lakh applications can be allotted minimum lots, effective probability becomes:
1,00,000 ÷ 5,00,000 = 20% allotment probability
This is why even strong IPOs often result in no allotment for most retail investors.
HNI investors apply above ₹2 lakh. Unlike Retail, HNI allocation is proportionate.
Example: If HNI category is subscribed 30x, and an investor applies for 300 lots, effective allotment may reduce proportionately to roughly 10 lots.
In strong IPOs, HNI subscription is often driven by leveraged funding. This can distort perceived demand.
QIBs include mutual funds, insurance companies, banks, and foreign institutional investors. They typically receive 50% allocation in Mainboard IPOs.
Strong QIB subscription, especially on Day 2 and Day 3, often signals institutional conviction. Many analysts consider QIB participation more reliable than Retail oversubscription when assessing listing strength.
Assume an IPO has total issue size of 1 crore shares.
If subscription levels are:
Then effective competition differs dramatically across categories. Retail might have lower probability than QIB despite higher multiplier.
Consider a strong Mainboard IPO where Retail subscription reached 25x, HNI reached 120x, and QIB reached 15x.
Even though HNI shows 120x, much of it may be funded by short-term leverage. QIB participation at 15x often provides stronger signal of long-term institutional interest.
Listing gains in such IPOs are frequently supported when QIB demand remains strong.
Retail probability is lottery-based. HNI probability reduces proportionately. QIB allocation depends on book building and institutional bidding patterns.
In heavily oversubscribed IPOs, Retail probability can fall below 5%, while HNI may receive partial allotment.
The subscription process follows a structured flow — bids are collected category-wise, tallied daily, and finalized at issue close before allotment logic is applied.
After bidding closes, each category is evaluated independently. Retail follows lottery allocation, HNI follows proportionate allocation, and QIB allocation depends on institutional book building.
Institutions often bid conservatively early and aggressively near closing. Monitoring daily subscription breakdown helps understand institutional intent.
QIB anchor allocations prior to IPO opening also influence post-listing stability.
IPO subscription figures are sourced from exchange disclosures and official bid data released during the IPO bidding period. Investors should always verify subscription numbers through official filings before making decisions.
IPOCraft aggregates publicly available data for informational and research purposes only.
Allocation structure differs significantly between Mainboard and SME IPOs. Understanding this structural difference is essential when analyzing subscription data.
| Category | Mainboard IPO | SME IPO |
|---|---|---|
| QIB | ~50% | Lower or optional |
| Retail | ~35% | Often 40%+ |
| HNI / NII | ~15% | Present |
| Market Maker | Not applicable | Mandatory portion |
SME IPOs typically have higher lot sizes and lower liquidity post-listing, which makes category interpretation different compared to Mainboard IPOs.
Consider a recent Mainboard IPO such as Tempsens Instruments (2026). The IPO saw QIB subscription of over 300x, well ahead of its Retail subscription of around 61x, with strong participation across categories on the final bidding day.
Despite heavy Retail oversubscription, institutional participation provided stronger confidence regarding listing sentiment. This example highlights why analysts often prioritize QIB demand over Retail multiples alone.
Historical examples demonstrate that balanced demand across QIB and Retail categories tends to create more stable listing outcomes.
Suppose an IPO has 10 lakh total shares available for allocation:
| Category | Shares Allocated | Subscription |
|---|---|---|
| QIB | 5,00,000 | 12x |
| Retail | 3,50,000 | 25x |
| HNI | 1,50,000 | 80x |
This simplified breakdown visually demonstrates how oversubscription levels differ across categories even when allocation percentages are fixed.
No. Strong QIB demand often reflects institutional confidence, but listing performance depends on valuation, market conditions, and overall demand balance.
HNI subscription can appear very high due to leveraged funding, where investors borrow capital to apply for large quantities.
Yes. In oversubscribed IPOs, valid retail applications enter a computerized lottery system where minimum lots are distributed fairly among applicants.
To understand how subscription connects with other IPO metrics, explore:
