June 1, 2026: QIB subscription is the portion of an IPO bid for by Qualified Institutional Buyers, the big professional money like mutual funds, insurance companies, banks and foreign institutional investors. In a book-built mainboard IPO, SEBI reserves up to 50% of the issue for them. The QIB number matters more than any other category because it tells you what informed institutional money thinks of the price. And those investors usually show up on Day 2 or Day 3, not Day 1.
Author: Aadarsh Patel | EQMint | EQ Originals
So if you check the QIB subscription on Day 1 and the QIB figure looks weak, that’s normal. Don’t panic and don’t act on it.
Here’s how QIB subscription actually works, why the late numbers carry the real signal and how a retail investor should read the data during a live IPO.
What does QIB mean in an IPO?
QIB stands for Qualified Institutional Buyer. These are large, SEBI-registered financial institutions with the capital and research teams to take big positions. Mutual funds, foreign institutional investors, insurance companies, pension funds and banks all fall in this bucket.
They’re the professionals. Before bidding, they run their own valuation models, meet management and dig through the DRHP in a way no retail investor realistically can.
That’s why their behaviour is worth watching. When a dozen mutual funds and FIIs independently decide an IPO is worth buying, that’s a far stronger signal than any grey market premium floating around on WhatsApp.
How much of an IPO is reserved for QIBs?
Depends on which route the company took. There are two standard splits.
Profitability route. For a company that meets SEBI’s profit criteria, a maximum of 50% of the issue goes to QIBs, a minimum of 15% to non-institutional investors and a minimum of 35% to retail investors.
QIB subscription route (rule 6(2)). For a loss-making company that lists under the institutional route, at least 75% must be allotted to QIBs, with around 10% for retail and up to 15% for NIIs. Zomato and Swiggy listed this way. If the QIB portion isn’t fully subscribed here, the whole issue can be pulled and money refunded.
One detail to note. Out of the QIB quota, 5% is reserved for mutual funds specifically. And up to 60% of the QIB portion can be set aside for anchor investors.
Who are anchor investors and how do they fit in?
Anchor investors are a subset of QIBs who commit a day before the IPO opens to the public. The minimum anchor ticket is 10 crore.
They exist to set the tone. When a respected fund anchors an issue, it signals confidence to everyone bidding after them. Their allotment price is fixed within the IPO band one day early.
Anchors can’t flip on listing day. SEBI locks them in with a two-tier rule: 50% of their shares are locked for 30 days from allotment and the remaining 50% for 90 days. That lock-in is deliberate. It stops anchors from dumping stock on day one and crushing the retail investors who bought in.
Why do QIBs bid on Day 2 and Day 3?
This is the heart of it. Retail investors front-load. Institutions wait.
On Day 1, the people applying early are excited retail investors. QIB and NII numbers are usually low. Total subscription on Day 1 is often just 0.5x to 2x, and the QIB figure can sit near zero.
QIBs hold back on purpose. They want to watch how the book builds, gauge overall demand and avoid showing their hand early. Many submit their full bids only in the final hours of the last day.
Take the Aequs IPO in December 2025. On Day 1, retail had oversubscribed its portion 6.42 times while QIBs had bid for just 36,480 shares against 2.26 crore reserved for them. That gap looked alarming if you only glanced at Day 1. It was simply institutions waiting, as they almost always do.
Even the LIC IPO, the biggest in the country’s history, saw its QIB portion fill only on the final day.
Why Day 2 numbers matter more than Day 1
Take a clear position here. Day 1 tells you about retail mood. Day 2 and Day 3 tell you what the smart money decided. The second is what should drive your call.
By the close of Day 2, the QIB book starts filling in earnest. By the Day 3 close, you have the full institutional picture. That’s the number to judge.
What the QIB figure tells you at close:
QIB above 10x. Strong institutional interest. Multiple funds independently found the valuation attractive.
QIB at 15x to 20x or higher. Heavy conviction. A stronger endorsement than any GMP reading.
QIB below 1x to 2x at close. A warning. The investors with the best information aren’t convinced by the price. Retail should pay close attention.
The logic is simple. If the people who do the most homework are hesitant at the final bell, a retail investor chasing listing gains should ask why.
How QIB demand moves the grey market
The two feed each other. A strong QIB bid on Day 2 or Day 3 often pushes the GMP sharply higher, because grey market operators read aggressive institutional buying as a confidence signal and quote a bigger premium.
Which is also the trap. A high GMP built on a strong QIB book can reverse fast if the market turns before listing. The QIB number is the more reliable of the two because it’s official exchange data, not an unofficial estimate. But neither predicts the listing price with certainty.
How to read live subscription data as a retail investor
A simple routine that works for most mainboard IPOs.
The exchanges publish updated subscription data every few hours through each of the 3 bidding days, between 10 AM and 5 PM. NSE and BSE are the source. This data is reliable, unlike GMP.
The plan. Ignore the QIB number on Day 1 entirely. Glance at it midway through Day 2 to see the book building. Make your real assessment near the Day 3 close, when the institutional picture is complete.
One catch for retail applicants. If you wait until the last hour to apply, so does half the market, and the systems clog. Many investors decide on quality by watching Day 2, then apply early on Day 3 to dodge the last-minute rush.
Quick reference, the three categories
| Category | Who they are | Standard quota |
| QIB | Funds, FIIs, banks, insurers | Up to 50% (75% on QIB route) |
| NII / HNI | Investors bidding above 2 lakh | At least 15% |
| Retail | Individuals up to 2 lakh | At least 35% |
FAQ
What is QIB subscription in an IPO?
It’s the portion of an IPO bid for by Qualified Institutional Buyers, such as mutual funds, FIIs, banks and insurance companies. SEBI reserves up to 50% of a book-built mainboard issue for them.
Why is QIB subscription low on Day 1?
Because institutions deliberately bid late. They prefer to watch the book build and usually submit their bids on Day 2 or Day 3. A low Day 1 QIB figure is normal, not a red flag.
What is a good QIB subscription number?
At the close of bidding, QIB above 10x is considered strong institutional interest. Figures of 15x to 20x signal heavy conviction. Below 1x to 2x at close is a warning sign.
Are anchor investors the same as QIBs?
Anchor investors are a subset of QIBs. They commit a day before the IPO opens, with a minimum ticket of 10 crore, and face a lock-in of 30 days on half their shares and 90 days on the rest.
How much of the IPO goes to QIBs?
On the profitability route, a maximum of 50%. On the loss-making QIB route under rule 6(2), at least 75% must go to QIBs or the issue is withdrawn.
Where can I check live QIB subscription data?
On the NSE and BSE websites, which publish updated figures every few hours through each of the 3 bidding days. This data comes straight from the exchanges and is reliable.
Does high QIB subscription guarantee listing gains?
No. A strong QIB book signals institutional confidence and often lifts the grey market premium, but it does not predict the listing price. Market conditions on listing day decide that.
Can QIBs withdraw their bids?
No. Unlike retail and NII investors, QIBs cannot withdraw a bid once placed, which is why their final numbers carry real weight.
EQMint is not a SEBI registered investment adviser. This article is for informational purposes only and is not investment advice.
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