Anchor Investor in IPO: Rules, Quotas and the Lock-In Trap
An anchor investor is an institutional buyer invited to commit capital to an IPO a day before the public bidding starts. Two ideas routinely get confused: anchor investors are not the same as general Qualified Institutional Buyers (QIBs), and an anchor bid is not a guarantee that the stock is cheap or safe. The structure exists to give an initial price signal to the market, but the rules governing how anchors enter, what they pay, and when they can exit are heavily restricted by law.
Dhanvantri Capital Services Private Limited, known as Dhanvantree, is an AMFI-registered mutual fund and Specialised Investment Fund distributor, ARN-194216, and a distributor of portfolio management services registered with APMI, APRN10201. We are not registered investment advisers. This page explains how a regulatory capital structure works. It names no public issue, promises no allocation, and sets no course of action. The choice is yours.
The short version:
Minimum application size is ₹10 crore; retail investors and HNIs cannot apply
Issuers can carve out up to 60% of the institutional (QIB) quota for anchor investors
Exactly one-third of the anchor book is reserved for domestic mutual funds, provided they bid
Anchor bidding happens entirely on T-1 day, one business day before the IPO opens to the public
The lock-in is split in two: half the shares are locked for 30 days, the other half for 90 days
If the final IPO price comes out lower than the anchor price, the anchor gets no refund
What an anchor investor actually is
An anchor investor is a Qualified Institutional Buyer (QIB) who bids for shares on a discretionary basis before the public issue opens. The category was introduced by the Securities and Exchange Board of India (SEBI) in 2009 under the Issue of Capital and Disclosure Requirements (ICDR) Regulations.
The logic is straightforward. Before retail investors and non-institutional investors put up their money, the company wants to show that large financial institutions have vetted the business and backed it with real capital.
Only specific institutions qualify to bid as anchors:
Mutual funds and alternative investment funds registered with SEBI
Foreign portfolio investors (FPIs)
Scheduled commercial banks and public financial institutions
Registered insurance companies and qualifying pension funds
To prevent promoters from gaming their own IPO, SEBI enforces strict conflict-of-interest bars. Promoters, promoter group entities, Book Running Lead Managers, and their immediate relatives cannot participate as anchor investors. The only exception is for independent mutual fund schemes or institutional arms that operate at arm’s length from the lead manager.
Ticket size and allocation limits: how the anchor book is built
A mainboard anchor bid requires serious institutional capital: the minimum application size is ₹10 crore.
The anchor quota is not an extra pool of shares created out of thin air. It is carved directly out of the QIB portion of the issue size. Under SEBI ICDR regulations, an issuer may allocate up to 60% of the QIB portion to anchor investors. The remaining 40% (or more, if the anchor book is not fully subscribed) must stay open for regular institutional bidding during the public issue.
Unlike the public portion of an IPO, where shares are allotted proportionately or through a lottery, anchor allotment is entirely discretionary. The company and its merchant bankers decide who gets in and who gets left out.
To keep the book diversified, Schedule XIII of the SEBI ICDR Regulations sets limits on how many anchors can share the pie:
| Size of the Anchor Allocation | Permitted Allottee Count | Minimum Allotment per Anchor |
|---|---|---|
| Up to ₹250 Crore | Minimum 2, Maximum 15 investors | ₹5 crore |
| Above ₹250 Crore | Minimum 5 for the first ₹250 crore; additional investors allowed in tiers of 10 per extra ₹250 crore block | ₹5 crore |
Notice the difference between application and allotment. An anchor must apply with at least ₹10 crore, but lead managers can allocate a minimum of ₹5 crore worth of shares to an individual anchor to accommodate more participants within the band.
When can anchor investors actually sell?
The shares given to anchor investors do not trade freely on listing day. They are subject to a mandatory split lock-in enforced at the depository level.
For years, anchors faced a simple 30-day lock-in. On day 31, entire funds would routinely dump their holdings, hitting retail investors who bought at listing. To curb this volatility, SEBI introduced a dual lock-in structure for all public issues opening on or after 1 April 2022:
50% of allotted shares: Locked in for 30 days from the date of allotment.
Remaining 50% of allotted shares: Locked in for 90 days from the date of allotment.
During those 30 and 90 days, the shares cannot be transferred, pledged, or sold in the market. Once day 30 and day 90 pass, the restriction lifts, and the anchor is free to hold or liquidate the position.
The price asymmetry: why a lower issue price gives no refund
Anchor bidding happens on T-1 day, which is the working day immediately before the IPO opens to the general public. Because anchors bid early, the price they agree to pay might not match the final cut-off price discovered when public bidding closes several days later.
SEBI rules handle this difference with an asymmetric settlement mechanism:
If the final IPO price is higher than the anchor price: The anchor cannot pocket a discount. The anchor must pay the additional margin money per share within the deadline stated in the offer documents.
If the final IPO price is lower than the anchor price: The anchor gets no refund. The investor is allotted shares at the original, higher anchor price.
For example, if an anchor bids and receives an allocation at ₹500, but public demand is sluggish and the book building discovers a final cut-off price of ₹475, the anchor still pays ₹500. They do not get a ₹25 refund. The public gets the lower price; the anchor absorbs the penalty of committing early.
The domestic mutual fund reservation
Anchor bidding happens before public retail subscriptions, often after institutional marketing meetings or an IPO roadshow. By the close of T-1 day, the issuer must publicly disclose the entire anchor sheet—who bought in, how many shares they took, and at what price—to the BSE and the NSE.
Within that anchor book, domestic institutions get statutory protection. Under SEBI regulations, exactly one-third (33.33%) of the anchor allocation is reserved for domestic mutual funds.
This reservation is conditional:
If domestic mutual funds submit valid bids at or above the anchor price, they are entitled to that one-third share.
If domestic mutual funds do not bid enough to fill the 33.33% quota, the unsubscribed balance can be given to other qualified institutional buyers, such as foreign portfolio investors or insurance firms.
To understand how mutual funds deploy this capital across schemes, read our breakdown of the different types of mutual funds.
What retail investors get wrong about anchor lists
A prominent anchor list shows that professional analysts looked at the company’s financial records before committing capital. But treating an anchor sheet as a green light to buy shares blindly ignores how institutional portfolios work.
Three realities are worth keeping in mind:
Portfolio sizing: A ₹50 crore anchor ticket in a mid-cap IPO might look massive to an individual, but for a ₹40,000 crore institutional fund, it is a 0.1% position. An institutional desk can afford to write off a speculative bet if it fails. A retail investor putting a large share of their savings into the same stock cannot.
No guarantee of listing gains: Anchors invest for various reasons, including long-term client mandates or tactical sector positioning. Their presence does not guarantee that the stock will open at a premium on listing day.
The 30-day and 90-day supply overhang: When the lock-in dates arrive, institutional funds that took tactical positions often trim or exit. That sudden surge in available market supply can create price pressure, regardless of the company’s underlying business.
An anchor book is an informative data point, not an endorsement. Look at the balance sheet, debt levels, and business model before deciding whether an issue makes sense for you.
Common Questions
No. High net-worth individuals cannot apply in the anchor category, even if they have ₹10 crore or more to commit. The category is strictly reserved for defined Qualified Institutional Buyers, such as registered mutual funds, insurance companies, banks, and foreign portfolio investors.
If the final offer price discovered through public book building is lower than the anchor allocation price, the anchor investor does not receive a refund. The anchor investor is allotted shares at the higher anchor allocation price.
No. All shares allotted to anchor investors carry mandatory lock-in periods. Anchor investors cannot sell any of their shares on listing day. Half of the holding unlocks after 30 days, and the remaining half unlocks after 90 days from the date of allotment.
SEBI regulations mandate that 33.33% of the anchor book be reserved for domestic mutual funds to ensure that domestic retail savings (pooled through mutual funds) get participation alongside large global foreign portfolio investors. If mutual funds do not submit sufficient bids, the remaining portion can be allotted to other QIBs.
The anchor investor list, including the names of the participating institutions, the number of shares allotted, and the allotment price, is submitted to the stock exchanges on T-1 day (the evening before the IPO opens to the public).
Disclaimer: The views expressed here are of the author and do not reflect those of Dhanvantree. Mutual funds are subject to market risks, please read the scheme documents carefully before investing.