Regulatory note: Lock-in rules may change and may differ according to the acquisition route, shareholder category and IPO structure. Investors should review the latest SEBI regulations, offer documents and transaction agreements before acting.
This article is for investor education only and is not investment advice, research advice, a buy/sell recommendation, or an assurance of liquidity, listing, price appreciation or IPO timelines. Transactions in unlisted securities may not have the same regulatory protections, exchange-based grievance redressal or investor-protection mechanisms available in the listed securities market. Investors should verify the legal route, counterparty, documents and applicable regulations before acting.
Ask five different unlisted-share investors what the unlisted shares lock-in period is, and you'll probably get five different answers. That's because there isn't one fixed rule. Whether a lock-in applies at all, and for how long, depends on how the shares were acquired, who the shareholder is, and whether the restriction is coming from SEBI's regulations or from a private agreement signed long before any IPO was on the table. Some shares may not carry a formal statutory or contractual lock-in, but any resale still depends on transfer restrictions, buyer availability, company approval where required, demat/settlement process, tax impact and applicable law. Others stay locked for months after a company lists. The only way to know which situation you're in is to check the specifics of the transaction rather than assume a general rule applies.
Direct answer: It's the stretch of time during which a holder of pre-listing shares can't sell them — either because SEBI's ICDR Regulations impose a statutory restriction that kicks in once the company lists, or because a private agreement restricts transfer regardless of listing. Low liquidity in the unlisted market is a related but separate problem from an actual lock-in.
There are really three different things people lump together under "lock-in," and mixing them up is where most confusion starts.
The first is regulatory lock-in, which only comes into play once a company completes an IPO, under SEBI's ICDR Regulations, 2018. The second is a contractual restriction — something baked into a shareholders' agreement or the company's articles of association, which can apply well before an IPO is even planned. The third is more of an operational restriction: no ready buyer exists, or the transfer paperwork simply hasn't been completed.
It helps to separate lock-in from illiquidity. A share can have zero formal lock-in attached to it and still be difficult to sell, simply because there's no exchange to trade it on. Conversely, a buyer might be lined up and ready, yet the share remains legally non-transferable because a depository has tagged it. Both situations stop you from exiting, but only one of them is a lock-in in the strict regulatory sense — and that distinction matters when you're planning around it.
This isn't an abstract compliance detail. It affects when you can actually get your money back.
Assuming shares become sellable the moment a company lists is one of the more expensive assumptions an investor can make. Capital access can be delayed well past the listing date if the shares sit in a statutory lock-in bucket. Selling before an IPO is its own challenge too — it comes down to whether a buyer can be found and whether the articles or shareholder agreement even allow the transfer. Even after listing, a sale isn't automatic on day one, because settlement and depository tagging take time to process. Layer on top of that the fact that IPO plans get delayed or shelved fairly often, and that share prices can swing sharply in the first days of trading, and it becomes clear why "I'll just sell after listing" isn't a plan on its own.
Listing a company doesn't flip a switch that frees every shareholder at once. Depository records have to correctly separate the free shares from the tagged ones, and that process isn't always instant.
When shares are issued directly by the company — through a fresh issue, a private placement, a preferential allotment, a rights or bonus issue, or the conversion of instruments like CCPS or CCDs — they enter the company's official capitalisation table from the date of allotment. This is generally the cleaner of the two acquisition routes from a records standpoint, since the company itself holds the allotment history.
How long the pre-IPO share lock-in period eventually runs depends on who's holding the shares and when they were allotted.
Promoters sit under Regulation 16 of the SEBI ICDR Regulations. A minimum promoters' contribution — typically at least 20% of post-issue capital — is locked in for a longer stretch after listing, while any promoter holding above that threshold usually carries a shorter lock-in. Non-promoter pre-issue shareholders fall under Regulation 17 instead, which locks the entire pre-issue capital held by such shareholders for six months from the date of allotment in the IPO. There are exemptions here worth knowing about — shares allotted under a compliant employee stock option scheme, for instance, and holdings by certain registered venture capital funds and Alternative Investment Funds that meet specific conditions. SME IPOs run on a related but somewhat different framework of their own.
Why does the acquisition date matter so much? Because lock-in calculations generally start from the allotment date, and the holding period of original shares and certain bonus shares can be aggregated for that purpose. The company's DRHP or RHP is where this gets spelled out — it will identify which pre-issue shares are locked in and for how long, and that document should be treated as the authoritative source rather than a general rule of thumb. It's also worth keeping the statutory lock-in separate in your head from any contractual restriction the investor may have separately agreed to, since the two can run on entirely different timelines, and the contractual one can easily outlast the regulatory one.
A secondary purchase is simply a transaction where an investor buys shares from an existing shareholder rather than subscribing to newly issued ones from the company. Ownership just moves from one holder to another — no new shares get created in the process.
Buying secondhand doesn't automatically create a new lock-in, but it doesn't wipe out any existing restriction either. A few things determine where a buyer actually stands:
Not necessarily, and it's genuinely not a yes-or-no question. Buy from a shareholder whose shares carry no encumbrance or contractual restriction, and you'll likely only be subject to whatever regulatory lock-in later kicks in at IPO. Buy from someone bound by an agreement, a pledge, or a company-imposed condition, and those restrictions can pass straight through to you. The only way to know for certain is to read the underlying agreements before the money changes hands.
Direct answer: Not always. It comes down to whether that specific holding falls within a statutory lock-in bucket under the ICDR Regulations, and whether the depository has correctly processed the shares as tradable in the demat account.
When a company lists, existing shareholdings don't vanish or reset — they simply carry over in the demat account. What changes is that some of those holdings become tradable while others stay restricted, based on instructions the issuer sends to the depositories marking the locked-in portion as non-transferable. That tag is typically lifted automatically once the relevant period runs out. Depositories, registrars and the exchange are largely executing instructions here — they're not independently deciding who gets to sell.
If a shareholder's shares carry no disclosed lock-in, they should, in principle, be tradable from the listing date, subject to normal settlement timing. A promoter or an early non-promoter investor caught under Regulation 16 or 17, on the other hand, simply can't sell until that period has run its course. The prospectus is where this is disclosed — which categories of shares are locked in, and for how long. It's worth remembering that the listing date and the date a particular holding actually becomes transferable are frequently not the same day.
| Point of Comparison | Pre-IPO Allotment | Secondary Purchase |
| Source | The company | An existing shareholder |
| Counterparty | The company itself | Another shareholder |
| Relevant date | Date of allotment | Often the seller's original allotment date |
| Contractual restrictions | Set by the subscription agreement | May be inherited from the seller |
| Post-listing lock-in | Governed by promoter/non-promoter rules | Depends on the share's prior history |
| Documents to check | Allotment letter, articles of association | Sale agreement, seller's proof of title |
| Liquidity before IPO | Depends on the company's own processes | Depends on finding a willing seller |
| Exit certainty | Tied to the IPO timeline | Same dependency, plus title accuracy |
Neither route comes out ahead across the board. Each carries its own paperwork and its own dependency chain.
| Factor | What to Check | Good Sign | Red Flag |
| Acquisition route | Allotment or secondary purchase | Clearly documented | Origin is vague or undocumented |
| Seller ownership | Seller's title to the shares | Verified holding matches records | Unclear or third-party holding |
| Acquisition date | Date shares were first allotted | Clearly stated and verifiable | Disputed or unavailable |
| Shareholder category | Promoter, non-promoter, employee | Confirmed against company records | Category is unclear or unconfirmed |
| Transfer approval | Whether board or company consent is needed | Approval process is defined | No clarity on how approval works |
| Contractual lock-in | Clauses in the underlying agreement | Terms disclosed before purchase | Terms withheld or vaguely described |
| IPO filing status | Whether a DRHP/RHP has been filed | Filed and publicly accessible | Only informal, verbal claims |
| Demat records | Accuracy of beneficial ownership | Matches the transaction documents | Mismatch or unexplained delay |
| Corporate actions | Bonus issues, splits, conversions | Clearly recorded and adjusted for | History is untracked or unclear |
| Fees and taxes | Brokerage, stamp duty, capital gains | Costs itemised upfront | Costs surface only after the fact |
Investors should also be careful about where and how the transaction is executed. SEBI has cautioned investors about buying or selling securities of unlisted public companies through unauthorized electronic platforms or websites. Such transactions may not carry the same investor-protection, dispute-resolution or grievance-redressal mechanisms available through recognized market infrastructure.
There are really only a handful of ways to exit unlisted shares, and each comes with its own strings attached:
A few realities are worth keeping in mind regardless of which route applies. A buyer isn't always available when you want one. The price quoted informally in conversation or on a platform can differ meaningfully from what's actually executable in a real transaction. Transfer restrictions can delay or block a sale even when a willing buyer is standing by. And an announced IPO is not the same thing as a guaranteed exit — timelines shift, and plans get shelved more often than investors expect. Taxes and transaction costs deserve a place in the decision too, not an afterthought.
There's no clean winner between a fresh allotment and a secondary purchase — it depends on what you're optimizing for. A fresh allotment usually comes with cleaner, company-issued documentation, but the price is set by the company rather than negotiated. A secondary purchase leaves more room to negotiate price, but transferability and lock-in visibility hinge on the seller's own history, which adds a layer of counterparty risk a fresh allotment doesn't really carry. Liquidity before an IPO is limited either way, and IPO-related uncertainty doesn't discriminate between the two routes.
A few questions tend to cut through the noise when deciding:
Supremus Angel supports investors by sharing available transaction-related information, helping them understand the general transfer and settlement process, and encouraging document-based verification before any transaction. This may include explaining whether a transaction appears to be a fresh allotment or secondary transfer, what documents should be reviewed, and what general risks may affect liquidity or exit.
Supremus Angel does not guarantee IPO timelines, listing gains, liquidity, buyers, exit price, allotment, regulatory approval or assured returns. The information shared is educational and process-oriented, and investors should take independent legal, tax and investment advice before entering any unlisted share transaction.
There's no single, universal unlisted shares lock-in period that covers every transaction — the real answer depends on how the shares were acquired, who's holding them, when the acquisition happened, what the contractual documents say, and how the company's own IPO disclosures classify that specific holding. A secondary purchase isn't automatically free of restrictions just because it didn't originate with the company, and listing on an exchange doesn't hand you an immediate exit either, since regulatory lock-in and depository processing can both hold things up. Before any money changes hands, check the actual lock-in position against the offer document and the transaction agreements — not against general assumptions or whatever came up in a chat with a broker.
1. What is the lock-in period for unlisted shares? It's the stretch during which a holder can't sell unlisted shares, arising either from SEBI's ICDR Regulations once the company lists, or from a private contractual restriction agreed earlier. The exact duration hinges on shareholder category and acquisition route, so it's worth confirming from the offer document rather than assuming.
2. Is there a fixed pre-IPO share lock-in period in India? No single fixed period covers all pre-IPO shares. Promoters and non-promoter pre-issue shareholders are treated quite differently under the ICDR Regulations, and contractual restrictions can stack on top of whatever the regulatory requirement is, depending on what was agreed at the time of acquisition.
3. Can I sell unlisted shares before the company's IPO? Possibly, through a private secondary transaction — subject to the articles of association, any shareholders' agreement, and actually finding a willing buyer. There's no exchange for unlisted shares, so completing a transfer can take longer than expected.
4. Are secondary purchases of unlisted shares subject to lock-in? They can be. Buying secondhand doesn't automatically create a fresh lock-in, but it also doesn't erase restrictions already attached to the shares. Buyers should check the seller's original acquisition date and any existing conditions before committing.
5. Can pre-IPO investors sell shares on the listing date? Not necessarily. It comes down to whether that specific holding sits in a statutory lock-in bucket and whether the depository has processed it as tradable. Some shareholders can sell right from listing; others stay restricted for a defined period afterward.
6. How can I check the post-listing lock-in applicable to my shares? The DRHP or RHP discloses which shareholder categories carry a lock-in and for how long. It's also worth confirming beneficial ownership status and lock-in tagging directly with your depository participant once the company actually lists.
7. Does the lock-in period start from the purchase date or listing date? It depends on which rule is in play. Regulatory lock-in is generally measured from the allotment date and takes effect at listing, though the holding period before an IPO filing can matter too. Verify the exact starting point from the offer document itself.
8. What happens if an IPO is delayed or cancelled? Any lock-in tied to that particular listing simply doesn't take effect, but that also means investors are left without the exit they were counting on. Contractual restrictions agreed separately from the IPO would still continue on their own terms.
9. Are bonus shares or split shares subject to the same lock-in? Often, yes — particularly where bonus shares are issued against already-locked-in original shares out of free reserves, since holding periods can be aggregated for the calculation. The exact treatment should be confirmed from the company's own disclosures.
10. How can an investor exit unlisted shares? Options include a private secondary sale, a company-approved buyback or tender offer, waiting out an IPO and subsequent listing, or simply continuing to hold if nothing suitable is available right now. Which route makes sense depends on the specific company and shares involved.
11. Is low liquidity the same as a lock-in period? No. Low liquidity just means a buyer might be hard to find even when the shares are legally transferable, while a lock-in is a formal restriction imposed by regulation or contract. Both get in the way of an exit, but for entirely different reasons.
12. Which documents should be checked before buying pre-IPO shares? Worth reviewing: the purchase or subscription agreement, the articles of association, any shareholders' agreement, the seller's original allotment records in a secondary deal, and the DRHP or RHP if an IPO filing already exists.
