What Happens to Unlisted Shares After an IPO?

If you've held unlisted (pre-IPO) shares in a company that has now gone public, here's what actually happens: your shares are converted into the same ISIN as the newly listed shares and continue to sit in your demat account — they don't vanish or need to be reissued. But whether you can sell them immediately depends entirely on which category of shareholder you fall into, because SEBI imposes different lock-in periods on different types of pre-IPO holders.

This is the part that catches a lot of investors off guard: buying unlisted shares before an IPO doesn't automatically mean you can cash out the moment the stock starts trading.

Lock-In Periods by Investor Category

SEBI's ICDR (Issue of Capital and Disclosure Requirements) Regulations set out different lock-in windows depending on who you are:

Investor Category	Lock-In Period	From
Promoters (minimum contribution — 20% of post-issue capital)	18 months	Date of allotment/listing
Promoters (any additional shares above the minimum contribution)	6 months	Date of allotment/listing
Non-promoter pre-IPO investors (VCs, PE funds, angel investors, employees) — mainboard IPO	6 months	Date of listing
Non-promoter pre-IPO investors — SME IPO	1 year	Date of listing
Anchor investors	50% released after 30 days; remaining 50% after 90 days	Date of allotment
Retail investors who bought through the IPO itself	No lock-in	Free to sell from day one of listing

The key distinction to hold onto: if you bought shares before the company went public — whether through a private placement, an employee stock option, or an unlisted-shares platform — you're a pre-IPO investor, and the 6-month (or 1-year, for SME) lock-in applies to you, regardless of exactly when during the pre-IPO window you actually bought in.

Why the Lock-In Exists

The regulatory logic is straightforward: without a lock-in, early investors who bought in at a much lower valuation could dump large blocks of shares the moment trading opens, creating sudden selling pressure that could crash the stock price for retail investors who bought through the IPO. Requiring pre-IPO holders to wait ensures:

• The company's early public market performance reflects genuine investor demand, not a supply glut from early backers cashing out
• Shares enter the market gradually rather than all at once, supporting price stability
• Promoters and early investors demonstrate ongoing commitment to the business, which builds market confidence

How Lock-In Is Actually Enforced

This isn't just a paper restriction — depositories (NSDL/CDSL) mark locked-in shares as "non-transferable" in your demat account, and most modern trading apps display a lock icon next to such holdings. Following a SEBI circular dated April 2026, issuing companies now carry direct contractual obligations to enforce this — incorporating lock-in provisions into their Articles of Association, not just relying on depository-level system flags. This closed a previous gap where pledged shares held by non-promoter investors weren't always properly marked as locked.

One nuance worth knowing: promoters are permitted to pledge their locked-in shares to scheduled commercial banks, public financial institutions, or systemically important NBFCs — but only for loans tied to the company's stated objectives, not for personal use. If such a pledge is invoked (i.e., the promoter defaults), the lock-in restriction transfers along with the shares to the lender, who also cannot sell until the original lock-in period expires.

What Happens When the Lock-In Expires

Once the lock-in period ends, your shares become eligible for trading — but this is worth being precise about: lock-in expiry does not mean you're required to sell. It simply removes the legal restriction. Many promoters and early investors choose to continue holding well beyond the lock-in date, particularly if they remain confident in the company's prospects.

That said, markets do commonly observe a "lock-in expiry effect" — a noticeable uptick in trading volume and sometimes downward price pressure around these dates, as some pre-IPO investors who've been waiting to realise gains choose to sell once they're finally permitted to. This is worth watching if you're considering buying into a stock shortly after its lock-in expiry date, which is publicly disclosed in the company's Red Herring Prospectus (RHP).

Taxation When You Eventually Sell

Once your lock-in ends and you decide to sell, the shares are now taxed as listed equity shares (since Securities Transaction Tax, or STT, applies to the sale on the exchange). Here's the important nuance: your holding period is counted from your original date of purchase — when you bought the unlisted shares — not from the date the company listed. This generally works in your favour if you held the unlisted shares for a meaningful stretch before the IPO.

Holding Period (from original purchase)	Tax Treatment
12 months or less	20% STCG
More than 12 months	12.5% LTCG, on gains above ₹1.25 lakh/year

Compare this to selling unlisted shares before an IPO (i.e., via an OTC/unlisted-shares platform, without ever going public): a different holding-period threshold applies — 24 months, rather than 12 — for shares to qualify as long-term, taxed at 12.5% without indexation; anything held for less is taxed at your income slab rate.

Given the complexity of tracking exact holding periods across a pre-IPO-to-listed transition, and some interpretational nuance in how tax authorities treat edge cases, it's worth having a tax professional confirm your specific computation before filing.

Practical Risks to Keep in Mind

• Illiquidity risk doesn't end at listing for everyone. If you're a pre-IPO investor, you're still locked out of the market for months after the stock starts trading — during which time the price could move significantly in either direction, and you can't act on it.
• Price at listing isn't guaranteed to hold by the time your lock-in expires — a stock trading well above its issue price at listing could be meaningfully lower six months later when you're finally free to sell, and vice versa.
• Track the RHP for exact dates. Lock-in expiry dates for each investor category are disclosed in the company's Red Herring Prospectus and are also typically available on IPO-tracking platforms — worth checking before assuming you (or a stock you're evaluating) are free of lock-in-related supply pressure.

Frequently Asked Questions (FAQs)

Q1. Can I sell my pre-IPO shares immediately after the company lists?

No, in most cases. Non-promoter pre-IPO investors face a mandatory 6-month lock-in (1 year for SME IPOs) from the listing date, during which the shares are marked non-transferable in your demat account.

Q2. Do retail investors who applied through the IPO also face a lock-in?

No. Shares allotted to retail investors through the IPO process itself carry no lock-in — they're free to trade from the very first day of listing.

Q3. What happens to my unlisted shares in my demat account after the IPO?

They convert to the same ISIN as the company's newly listed shares and remain in your account, marked as locked-in (non-transferable) until the applicable lock-in period expires.

Q4. Does lock-in expiry mean promoters or investors will definitely sell?

No. Lock-in expiry only removes the legal restriction on selling — it doesn't obligate anyone to sell. Many promoters and long-term investors continue holding well past the lock-in date.

Q5. How is my holding period calculated for tax purposes once I do sell?

It's counted from your original purchase date of the unlisted shares, not from the IPO listing date — which can work in your favour if you held the shares for a significant period before the company went public.

Q6. Can promoters do anything with their locked-in shares before the lock-in ends?

Yes, with restrictions — promoters can pledge locked-in shares to banks, public financial institutions, or qualifying NBFCs for loans tied to the company's business objectives, but not for personal use.

Disclaimer: This article is for informational and educational purposes only and does not constitute investment or tax advice. Lock-in periods, SEBI regulations, and tax treatment are subject to change and may vary based on specific circumstances, including the type of pre-IPO investment and any private contractual lock-in terms that may extend beyond SEBI's minimum requirements. Please refer to the company's Red Herring Prospectus for exact lock-in dates applicable to your holding, and consult a qualified financial or tax advisor before making investment decisions.