IPO Lock-in Period
IPO lock-in period is the mandatory period after listing during which certain shareholders are restricted from selling their shares. SEBI mandates lock-in to prevent promoters and pre-IPO investors from immediately exiting after listing, which could destabilise the share price.
What Is the IPO Lock-in Period?
After an IPO, not all shareholders can sell their shares immediately. SEBI imposes lock-in restrictions on:
– **Promoters’ minimum contribution**: locked in for 18 months from the date of allotment (reduced from 3 years post-2021 SEBI reforms)
– **Remaining promoter holding**: locked in for 6 months from allotment
– **Anchor investors**: locked in for 30 days from allotment
– **Pre-IPO shareholders (VC, PE, pre-IPO placement holders)**: locked in for 6 months from allotment
Public shareholders (those who received allotment in the IPO) are not subject to any lock-in and can sell from listing day itself.
Why Lock-in Matters
Lock-in protects retail investors from:
– Promoters “pumping and dumping” shares immediately after listing
– Institutional investors who got in at pre-IPO valuations flooding the market with cheap shares on listing day
– Artificial price discovery distorted by large insider selling
Lock-in Period After SEBI’s 2021 Reforms
SEBI reformed lock-in rules in 2021:
– Promoters with minimum 20% contribution: 18 months lock-in
– Promoters holding above minimum contribution: 6 months lock-in
– This replaced the older 1-year blanket lock-in
Practical Example
A technology company lists after its IPO. The promoter holds 45% of post-IPO shares. SEBI rules require the minimum contribution of 20% to be locked for 18 months and the remaining 25% for 6 months. Six months after listing, the promoter can sell 25% of their shares. But the first 20% cannot be sold for 18 months.
Key Takeaways
– IPO lock-in restricts promoters and pre-IPO investors from selling shares immediately after listing
– Promoters’ minimum contribution is locked for 18 months; remaining holding for 6 months
– Anchor investors face a 30-day lock-in; pre-IPO shareholders face 6 months
– Public IPO allottees have no lock-in and can sell from day one
– Lock-in protects retail investors from large insider selling immediately after listing
