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June 14, 2026

Definition

Promoter Lock-in

Promoter lock-in is the period after an IPO during which promoters cannot sell their shares, ensuring they retain skin in the game.

Under SEBI ICDR Regulations, the promoters' minimum contribution (20% of post-issue capital) is locked in for a set period after listing, and any promoter holding above that is locked in for a shorter additional period. The rules were eased in 2021 so that, where issue proceeds are not for capital expenditure, the core lock-in can be 18 months instead of three years.

Lock-in prevents promoters from cashing out immediately and signals their long-term commitment. The scheduled expiry of large promoter lock-ins is closely tracked because it can add selling pressure to the stock.

Related terms

  • Anchor Lock-inAnchor lock-in is the mandatory period for which anchor investors must hold their IPO shares before they can sell.
  • Minimum Promoter ContributionMinimum promoter contribution is the share of post-IPO capital that promoters must hold and lock in, normally 20%.
  • Offer for Sale (OFS)An OFS is the route through which existing shareholders sell their shares to the public — either as part of an IPO or via a separate exchange mechanism — with proceeds going to them rather than the company.

Plain-English explainer from The Dispatch Investors Encyclopedia. General information, not financial advice.