Oversubscription means valid bids in a category ask for more shares than that category has. A retail quota that can absorb every valid retail bid is not oversubscribed, even if the institution book is full. Read the category, not a single headline multiple. The exchanges publish demand while the book is open. That screen is interest. The basis of allotment, after the close, is the result.
SEBI’s general information document sets the retail steps. Divide the retail shares by the minimum lot. That is the most retail applicants who can each receive one lot. If valid retail applicants are more than that number, the issue is oversubscribed in the sense that matters for the lottery. A draw of lots picks the names. SEBI’s February 2025 investor note calls the same step a lottery. Each name that comes out gets one minimum lot, not a stack of lots.
If valid applicants are fewer than that maximum, the category may still have been bid for more shares than it holds, because some people bid many lots. Everyone still gets one lot. Shares that remain are allotted in proportion to the extra shares people asked for. Proportion here is arithmetic on leftover shares. It is not the company choosing a favourite. If demand fits inside the quota, valid bids are allotted in full and nothing is drawn.
Why more lots do not buy odds
In the heavy case, the draw is of applicants. Your name goes in once. A bid for one lot and a bid at the retail cap of ₹2,00,000 are one name each. Adding lots blocks more money. It does not add a ticket. The money stays in your account under ASBA, or under a UPI mandate, until allotment. If your name is not picked, the block is released.
This illustration is not a live IPO. A retail pool of 1,00,000 shares, in lots of 100, is 1,000 lots. 4,000 valid applicants means 1,000 names receive a lot and 3,000 receive nothing. One name is picked for every 4 valid applicants. The mild picture uses the same pool and only 800 applicants. Everyone gets one lot, 200 lots are left, and a person who bid 3 lots can receive an extra lot on these made-up numbers. The bigger bid mattered only because the lottery never started.
The other categories
Institutions are not in that lottery. A larger institution bid receives a larger share of the institution quota. Non-institutional investors used to be allotted only in proportion, which rewarded the largest form. The May 2025 FAQ says each of them gets at least the minimum lot, subject to availability, and only the remainder is in proportion. The January 2025 board note says main-board non-institutional allotment is a draw of lots. The small bucket is applications above ₹2,00,000 up to ₹10,00,000, with 1/3 of the non-institutional quota. The big bucket is above ₹10,00,000, with 2/3.
A multiple of “times subscribed” on a news site is not a promise. If the company finds fewer than 1,000 prospective allottees, it cannot allot at all. The allotment guide has the worked example. The application guide is the bid. A regular purchase, instead of one crowded issue, is a SIP.
Questions
Does oversubscription mean I will not get shares?
Not by itself. If the retail quota can still give every valid applicant one minimum lot, everyone gets that lot and only the spare shares are shared by extra demand. The lottery starts when there are more valid applicants than lots.
Do institutions face the same lottery?
No. Qualified institutional buyers are allotted in proportion to their bids. Non-institutional investors on the main board are closer to retail: a draw of lots for the minimum lot, inside the small and big buckets, subject to shares being available.
Is a grey market premium a measure of oversubscription?
No. Oversubscription is official demand against the shares in that category, as the exchanges report it and the basis later records it. A grey market premium is an unofficial price. This site does not print one, and it does not decide the draw.
Sources
Figures checked 31 Oct 2026.