IPO Lock In Periods: When Can Promoters, Employees, And Anchor Investors Sell

Without any restriction, promoters and early investors could sell large blocks of shares within days of listing, flooding the market with supply the moment retail investors have just bought in at the issue price. A lock in period prevents exactly that, forcing the people who knew the company best before it went public to keep their money in it for a defined stretch afterward.

The idea is less about punishing insiders than about signalling genuine confidence, and about giving the stock time to find a stable trading pattern before the largest holders are even legally able to exit.

Promoter shareholding is not locked in as a single block. SEBI's ICDR Regulations split it into two separate buckets, each running on its own clock. The minimum promoters' contribution, typically 20% of the company's post issue capital, is locked in for 18 months, a period that was reduced from 3 years through a 2021 reform aimed at making it easier for companies to go public without over restricting their largest shareholders.

Any promoter shareholding beyond that minimum contribution carries a shorter lock in of 6 months, itself reduced from 1 year in the same round of reforms.

Promoter Holding	Lock In Period
Minimum promoters' contribution (typically 20% of post issue capital)	18 months
Promoter shareholding beyond the minimum contribution	6 months

Anchor investors, the institutions given guaranteed allocation ahead of an IPO opening to the public, do not have their entire holding released on a single date. Half of their allotted shares are locked in for 30 days from allotment, and the remaining half for 90 days. This staggered structure itself dates to a 2022 amendment.

Before that change, the full 50% released at 30 days was the only anchor lock in, and a wave of anchor selling right on day 31 had, on more than one occasion, put real pressure on a newly listed stock. Splitting the release into two dates was a direct response to that pattern.

Day 30 is not the day anchor risk disappears. It is the day half of it does, with the other half still to come 60 days later.

This is the detail most likely to surprise a first time reader. Shares allotted to employees under an Employee Stock Option Scheme, an Employee Stock Purchase Scheme, or Stock Appreciation Rights are specifically exempt from the standard non promoter lock in, provided the underlying scheme itself complies with SEBI's Share Based Employee Benefits Regulations, 2014.

An amendment dated March 8, 2025, extended this exemption further, to cover bonus shares issued against existing ESOP or ESPS holdings as well. In practice, this means an employee holding shares through a compliant stock option scheme can typically sell immediately upon listing, the same freedom a retail investor has, rather than facing the multi month restriction that applies to most other pre IPO shareholders.

Pre IPO investors who are neither promoters nor covered by an exempt employee scheme, venture capital funds, private equity investors, and other early non promoter shareholders, face a general lock in of 6 months from allotment, also reduced from 1 year through the 2021 reforms.

A more recent addition applies specifically to larger holders: non promoter shareholders holding more than 20% of the company must retain at least half of that stake for a full year, a longer, partial restriction aimed squarely at the largest non promoter positions rather than smaller ones. Category I and II Alternative Investment Funds that have held their shares for at least 6 months before the draft prospectus was filed are generally exempt from this general non promoter lock in altogether.

None of this restricts a retail investor's own shares. Once allotted and listed, retail holdings carry no lock in of any kind and can be sold the same day. What is worth watching instead is the lock in expiry calendar for stocks you already hold, since a large block of promoter, anchor, or other pre IPO shares becoming legally sellable on a specific date is a real, schedulable event.

It is worth being precise about what expiry actually means: it lifts the legal restriction, it does not compel anyone to sell. A lock in expiring is a risk worth watching, not a guaranteed price event, and plenty of expiries pass without any unusual selling at all.

A genuine gap existed in how these rules were enforced when pre IPO shares held by non promoters were pledged as loan collateral. Depository systems were technically unable to mark pledged securities with a standard lock in flag, leaving a real difference between what the regulation required and what could actually be implemented.

A March 2026 amendment to Regulation 17 of the SEBI ICDR Regulations addressed this directly, requiring depositories to record such pledged shares as non transferable for the full duration of the applicable lock in once instructed by the issuer, with the restriction continuing even if the pledge is later invoked or released.

Promoters themselves retain a separate, narrower right to pledge their own locked in shares as loan collateral, but only where the loan comes from a scheduled commercial bank, a public financial institution, or a systemically important NBFC, and only for purposes connected to the company's own stated objects.

If that pledge is ever invoked and the lender takes possession of the shares, the original lock in continues to apply to the lender exactly as it would have applied to the promoter, rather than lapsing simply because ownership changed hands.

The current lock in framework is the product of several rounds of SEBI reform rather than a single, static rulebook.

Date	Change
2021 amendment	Minimum promoters' contribution lock in reduced from 3 years to 18 months; general pre IPO investor lock in reduced from 1 year to 6 months
2022 amendment	Anchor investor lock in split into two tranches, 50% at 30 days and 50% at 90 days, to avoid a single concentrated release date
2024 to 2025 amendments	Non promoter shareholders holding more than 20% required to retain at least half that stake for a full year; the ESOP and ESPS lock in exemption extended to bonus shares issued against those holdings
March 2026 amendment	New Regulation 17(2) requires depositories to record pledged non promoter shares as non transferable for the lock in duration, closing a previous enforcement gap

All Four Categories, Side By Side

Category	Lock In Period	Key Condition
Promoters, minimum contribution	18 months	Applies to the 20% of post issue capital treated as minimum contribution
Promoters, shareholding beyond the minimum	6 months	Applies to any promoter holding above the minimum contribution threshold
Anchor investors	30 days for half the allotment, 90 days for the rest	Staggered specifically to avoid a single release date
Employees, via a compliant ESOP, ESPS, or SARs scheme	Generally exempt	Requires the underlying scheme to comply with SEBI's 2014 employee benefit regulations
Other pre IPO, non promoter shareholders	6 months, with a further 1 year partial restriction above a 20% stake	Category I and II AIFs held 6 or more months before the draft prospectus are generally exempt
Retail investors	None	Free to sell from the day of listing

Note: Retail investors who buy shares in an IPO carry no lock in of any kind and can sell the moment the stock lists. Everyone else, promoters, anchor investors, employees, and other pre IPO shareholders, faces some version of a restriction, and the specifics differ meaningfully by category. Between December 2025 and March 2026 alone, roughly 108 companies saw lock in expiries covering shares worth close to Rs 3 lakh crore, a reminder that this is a genuinely sizeable, recurring market event rather than a narrow technical footnote. A March 2026 amendment to SEBI's ICDR Regulations, covered further down, also closed a real gap in how these restrictions are enforced.

This article is for general informational purposes only and does not constitute investment advice. Lock in periods, exemptions, and regulatory details described here reflect SEBI's ICDR Regulations as understood as of July 2026 and may change with future amendments. Confirm current lock in schedules for a specific company directly in its prospectus or through the stock exchange, and consult a qualified financial adviser for guidance specific to your situation.