What is an anchor investor?

An anchor investor is a qualified institutional buyer that applies in the anchor book of a book-built IPO, before the issue opens to other bidders. The application has to be at least ₹10 crore on a main-board issue. On an SME issue under the SME chapter, the floor is ₹2 crore. These are application sizes, not a measure of whether the issue is “good”.

Up to 60% of the portion reserved for qualified institutional buyers may go to anchors. The lead managers allot that portion at their discretion, and they finish it on the anchor bidding day. A mutual fund, a bank or an insurer can be in that list. The lead managers themselves, and people related to the promoters, are generally not eligible to apply as anchors.

If the price discovered in the main book is higher than the anchor price, the anchors pay the difference. If the discovered price is lower, the extra amount they paid is not refunded. Anchors take that price risk on purpose. It is not a discount that is handed back when the band clears lower.

The lock-in

For issues opening on or after 1 April 2022, the shares allotted to anchors are split. 50% are locked for 90 days from the date of allotment. The remaining 50% are locked for 30 days. Where the issue size is ₹10,000 crore or more, the same split is effective from 1 July 2022. A lock-in means those shares cannot be sold on the exchange during that period. It does not mean the retail shares you may be allotted are locked. Retail lock-in, if any, is a different line in the offer document, usually for an employee reservation.

How to read the headline

“Fully subscribed by anchors” means institutions took the portion that was offered to them. It does not mean the retail book is full, and it does not mean your application will win the draw. Read the anchor list for familiar names if you want to. Then read the risk factors anyway. The offer-document guide puts anchors next to the rest of the document. The allotment guide is the retail draw. A busy anchor book is not a grey market premium, and it is not a promise of listing-day demand. Retail shares are a separate bucket. An anchor bid does not improve the chance of a retail lottery win. Figures were checked on 2 November 2026 against the ICDR Regulations as amended up to 21 March 2026.