Investor Categories 6 min read

What is an Anchor Investor in IPO? Rules, Lock-in and What the Anchor Book Tells You

M

Moksh Shah

Published on Sep 30, 2026
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Timeline showing anchor investor bidding one day before an IPO opens to the public

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INTRODUCTION

On 14 October 2024, one day before Hyundai Motor India's ₹27,870 crore IPO opened to the public, 225 investors had already been allotted shares worth ₹8,315 crore. Retail applicants had not yet seen the bidding screen, but the anchor list was already on the exchange websites. That list is the earliest hard evidence of institutional demand an IPO offers, and also one of the most over-interpreted.

Practical Tips

An anchor investor is a Qualified Institutional Buyer (QIB) that bids at least ₹10 crore in a mainboard IPO (₹2 crore in an SME IPO) and is allotted shares one working day before the issue opens to the public. Anchors can take up to 60% of the QIB portion, and half of their shares are locked in for 30 days and half for 90 days.

How the Anchor Round Works

An anchor round is a one-day, private book run by the company and its book running lead managers (BRLMs). Bidding opens and closes on the working day before the public issue, and allotment happens the same day. The allocation is discretionary. The BRLMs choose who gets how much, unlike the retail category, where oversubscribed issues are settled by lottery.

The anchor price is fixed before the issue opens. For both Hyundai Motor India (₹1,960) and Ola Electric (₹76), it was the upper end of the price band, which is also the price retail applicants finally paid. The anchor portion is carved out of the QIB quota, so it does not shrink the retail or HNI quotas. Companies value the round because it locks in a large block of demand before the public window and puts recognisable institutional names on record.

StageWhat happensHyundai Motor India (2024)
Day before openingAnchor bidding and allotment14 Oct: 4.24 crore shares at ₹1,960
Issue daysPublic bidding window15–17 Oct
AllotmentBasis of allotment finalised18 Oct
ListingShares begin trading22 Oct

Who Can Be an Anchor, and How Many

Only QIBs qualify, which means mutual funds, insurers, banks, SEBI-registered foreign portfolio investors and pension funds meeting the corpus threshold. A retail investor cannot bid in this category, whatever the amount. SEBI's amendment effective 30 November 2025 reshaped the framework, and the table shows the current position.

RuleCurrent position
Minimum bid₹10 crore (mainboard), ₹2 crore (SME)
Minimum allotment₹5 crore per anchor
Number of anchorsAllocation up to ₹250 crore: 2 to 15. Above ₹250 crore: at least 5 and at most 15 for the first ₹250 crore, plus 15 for every additional ₹250 crore or part thereof
Size capUp to 60% of the QIB portion
Reserved slice40% of the anchor portion: 33.33% for domestic mutual funds, 6.67% for life insurers and pension funds. Any unfilled insurer/pension slice goes to mutual funds

Before the amendment, only one-third of the anchor portion was reserved, and it was for mutual funds alone. The change is aimed at drawing in more long-horizon domestic money.

A Real Anchor Book: Hyundai Motor India

Hyundai's anchor book is a clean specimen because every number is public. Foreign names included GIC, New World Fund, JP Morgan Funds, Fidelity and BlackRock, while domestic funds such as SBI MF, HDFC MF, ICICI Prudential MF and Nippon India MF, along with insurers like SBI Life, filled the rest.

ItemHyundai Motor India (Oct 2024)
Amount raised₹8,315.28 crore
Shares allotted4,24,24,890
Price₹1,960 (upper end of band)
Investors225
Share of QIB portion60% (29.84% of total issue)
Domestic mutual funds' share34.4% of anchor portion

Ola Electric offers a contrast in shape. Its anchor book raised ₹2,763 crore from 84 investors at ₹76, with ten domestic mutual funds taking ₹1,117 crore, about 40.43% of the book.

Practical Tips

A record anchor book did not protect Hyundai's listing. The shares listed at ₹1,934, about 1.3% below the issue price, and fell around 6% on debut day. Anchors showed they were willing to buy at ₹1,960. They did not commit to what the market would pay on day one.

Myth vs Reality

Anchor rounds attract folklore, and three claims come up more than any others.

MythReality
Anchors buy at a discount that retail never getsIn both Hyundai and Ola, anchors paid the upper end of the band, the same price as the final issue price
Anchors are locked in for monthsOnly half is locked for 90 days; the other half can be sold after 30 days
A big anchor book guarantees listing gainsHyundai had 225 anchors and still listed below issue price

The Lock-in: When Anchors Can Sell

Since April 2022, 50% of each anchor's shares are locked in for 30 days and the remaining 50% for 90 days. Both periods run from the date of allotment, not the listing date. Before that, the whole allocation came free after a single 30-day lock-in. When a date falls on a weekend, the first chance to sell is the next trading day.

IPOAnchor allotment50% freeRemaining 50% free
Hyundai Motor India14 Oct 202417 Nov 202416 Jan 2025
Urban Company9 Sep 202516 Oct 202514 Dec 2025

These dates are known from day one. Urban Company, which raised ₹853.87 crore from anchors, saw its shares fall nearly 4% when the first lock-in ended in October 2025. An unlock date does not force selling, but it adds supply to the market.

How to Read an Anchor Book Before You Apply

The anchor allotment is published on the exchange websites on the bid date, usually the evening before your application window opens. Four checks take a few minutes. First, look at the mix. Long-only mutual funds, insurers and sovereign funds signal patient demand, while a book dominated by a few unfamiliar names deserves more caution. Second, see whether the anchors took the full 60% of the QIB portion, which suggests demand exceeded what the company could give. Third, compare the anchor price with the upper end of the band. Fourth, mark the 30-day and 90-day unlock dates in your calendar.

Then pair this with the grey market reading on IPO360's Live GMP Tracker (ipo360.in/gmp), remembering that both signals can miss. An anchor book tells you who was willing to be early, not who is willing to stay.

KEY TAKEAWAYS

  1. An anchor investor is a QIB that bids at least ₹10 crore (mainboard) and is allotted shares one working day before the IPO opens.
  2. Anchors can take up to 60% of the QIB portion, and this does not reduce the retail or HNI quotas.
  3. Since 30 November 2025, 40% of the anchor portion is reserved: 33.33% for mutual funds and 6.67% for insurers and pension funds.
  4. Half of each anchor's shares unlock after 30 days and half after 90 days, counted from allotment.
  5. Anchors paid the upper end of the band in Hyundai and Ola, the same price as retail.
  6. A strong anchor book shows institutional appetite at the issue price, not a guaranteed listing gain.

Frequently Asked Questions

What is an anchor investor in an IPO?
An anchor investor is a large institutional buyer, technically a Qualified Institutional Buyer, that is allotted IPO shares one working day before the issue opens to the public. The minimum bid is ₹10 crore in a mainboard IPO. Anchors are chosen by the company and its lead managers, and their shares carry a staggered 30-day and 90-day lock-in.
Can retail investors become anchor investors?
No. Only Qualified Institutional Buyers can bid in the anchor category, and the minimum bid is ₹10 crore in a mainboard issue. Retail investors apply during the public window through their broker or UPI, and their allotment follows the retail category rules. Some indirect exposure comes through mutual funds, which often form a large part of the anchor book.
What is the minimum investment for an anchor investor?
A mainboard anchor must bid at least ₹10 crore, while the SME threshold is ₹2 crore. Separately, SEBI's amended rules require a minimum allotment of ₹5 crore per anchor investor. The number of anchors is capped at 15 for allocations up to ₹250 crore, with 15 more allowed for every additional ₹250 crore or part of it.
Is a strong anchor book a reason to apply for an IPO?
Not on its own. An anchor book shows that institutions were willing to buy at the issue price, which is useful evidence, but it says little about what the wider market will pay on listing day. Hyundai Motor India had 225 anchors and still listed slightly below its issue price. Use it alongside valuation, financials and grey market signals.
How long is the anchor investor lock-in period?
Half of the shares allotted to each anchor are locked in for 30 days and the other half for 90 days, both counted from the date of allotment, not the listing date. Before April 2022, the entire anchor allocation had a single 30-day lock-in. When a lock-in ends, the shares become eligible for sale, which can add selling pressure.
What changed in SEBI's anchor investor rules in November 2025?
The amendment, effective 30 November 2025, raised the reserved share of the anchor portion from one-third to 40%: 33.33% for domestic mutual funds and 6.67% for life insurers and pension funds. It also allowed 15 additional anchors (up from 10) per further ₹250 crore, merged the two discretionary categories up to ₹250 crore, and fixed a ₹5 crore minimum allotment.
Where can I find the anchor investor list for an IPO?
Stock exchanges publish the anchor allottee list on the anchor bid date, usually the working day before the issue opens. The company's website and the red herring prospectus also carry the details. Most IPO data portals summarise the anchor amount, price and lock-in end dates, so you can check those dates against your own holding plan.

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