SEBI (SAST) Regulations, India: Open Offer Triggers, Pricing and Exemptions Explained

Open offer triggers india sit at the heart of every control transaction involving a listed company, and understanding them is now more commercially urgent than ever. As 2026 deal activity accelerates, driven by promoter consolidations, private-equity exits and cross-border inbound M&A, acquirers, promoters and boards need a precise map of when a mandatory open offer is required, how the offer price is calculated, what timelines apply, and which exemptions can lawfully be relied upon. This practitioner explainer walks transaction teams through the trigger tests, pricing mechanics, escrow and disclosure obligations, and the structuring options available under the SEBI (Substantial Acquisition of Shares and Takeovers) Regulations, 2011.

The aim is a single, deal-room-ready reference that removes the guesswork from Indian takeover compliance.

Every threshold and formula in this article should be reconfirmed against the primary regulation text on the Securities and Exchange Board of India portal before filing, because SEBI periodically amends the SAST framework through amendment regulations, circulars and clarifications.

Quick primer, SEBI SAST in one page

The SEBI (Substantial Acquisition of Shares and Takeovers) Regulations, 2011, commonly called the SAST Regulations or the takeover code, govern how shares, voting rights and control in Indian listed companies may be acquired. Their central purpose is investor protection through equal treatment: when an acquirer takes control or a substantial stake, public shareholders must be given a fair exit at a fair price via a mandatory open offer, rather than being locked into a company whose control has quietly changed hands.

The SAST code operates alongside the Companies Act, 2013 framework administered by the Ministry of Corporate Affairs and the continuous-disclosure obligations under the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 (LODR) enforced by SEBI and the stock exchanges. In practice, a takeover transaction touches all three regimes simultaneously, SAST for the offer mechanics, the Companies Act for schemes and approvals, and LODR for ongoing disclosure. Recognising which regime governs each step is the first discipline of clean takeover compliance.

Key definitions to know

• Acquirer. Any person who, directly or indirectly, acquires or agrees to acquire shares, voting rights or control over a target company, whether alone or together with persons acting in concert.
• Target company. A company whose shares are listed on a recognised Indian stock exchange and whose shares or control are being acquired.
• Control. The right to appoint a majority of directors, or to control the management or policy decisions, whether through shareholding, management rights, shareholders’ agreements, voting agreements or otherwise. Control is a substance-over-form test, it is not measured by shareholding alone.
• Promoter. A person identified as such in offer documents or filings, or who exercises control over the affairs of the company directly or indirectly, as recognised under SEBI regulations and the Companies Act.
• Persons acting in concert (PAC). Individuals or entities who, with a common objective of acquiring shares, voting rights or control, co-operate through an agreement or understanding, formal or informal. Certain relationships are deemed to be PAC unless the contrary is established.
• Relevant date / relevant period. The reference dates and lookback windows the regulations use to fix the open offer price and to measure acquisitions, these are pricing-critical and must be read from the regulation text itself.

Because “control” and “persons acting in concert” are interpreted purposively, they generate most of the disputes in Indian takeover practice. The Securities Appellate Tribunal and the courts have repeatedly examined whether particular arrangements amount to control or concert; those precedents are collected through the Securities Appellate Tribunal orders portal and are essential reading before structuring any borderline deal.

When is an open offer required? The trigger tests behind open offer triggers india

The most frequent question deal teams ask is deceptively simple: when do the open offer triggers india rules actually bite? The SAST code sets out a defined set of trigger events, and any one of them, crossed alone or in concert, can compel a mandatory open offer. Broadly, the triggers fall into three families: the initial-threshold trigger, the creeping-acquisition trigger, and the control trigger.

• Initial threshold acquisition. An acquirer (with PAC) who acquires shares or voting rights entitling the acquirer to 25% or more of the voting rights in a target company must make an open offer to public shareholders. This is the primary quantitative trigger under the SAST Regulations.
• Creeping acquisition beyond the annual limit. An acquirer already holding 25% or more, but less than the maximum permissible non-public shareholding, who acquires additional voting rights beyond the permitted annual creeping limit, triggers an open offer. The creeping allowance is measured across a financial year.
• Acquisition of control. Irrespective of the quantum of shares acquired, the acquisition of control over a target company triggers a mandatory open offer. Control can pass through board-appointment rights, management rights or agreements without any single share changing hands at the trigger moment.

These triggers are cumulative in effect: an acquirer must test a proposed transaction against every trigger, because the deal may be quantitatively below one threshold yet cross another through the acquisition of control or through the aggregation of concert-party holdings.

Control versus shareholding, practical examples

The distinction between crossing a shareholding threshold and acquiring control is where most structuring value, and most risk, lies. Two short scenarios illustrate the point.

• Scenario one, cross-border PE buy. A foreign private-equity fund negotiates to acquire a 22% stake from existing promoters. Quantitatively, 22% is below the 25% initial threshold, so at first glance no open offer arises. But if the share-purchase agreement grants the fund the right to appoint a majority of directors, affirmative veto rights over key policy decisions and management control, the acquisition of control trigger may be engaged and an open offer becomes mandatory despite the sub-25% stake. The lesson: negotiated governance rights, not the headline percentage, can determine the outcome.
• Scenario two, promoter consolidation of public shares. A promoter group already holds 40% and wishes to buy shares from the open market to consolidate its position ahead of a strategic decision. Because the group is already above 25%, the relevant question is whether the additional purchases exceed the permitted annual creeping limit. Purchases within the creeping allowance can be made subject to disclosure obligations; purchases beyond it trigger an open offer. Careful sequencing across financial years is a legitimate planning tool here.

Concert parties and deemed acquisitions

Because open offer triggers india are measured on an aggregated basis, identifying persons acting in concert is a non-negotiable step in transaction diligence. A single acquirer holding 20% may sit comfortably below the initial threshold, but if two co-investors holding 3% each are acting in concert with the acquirer toward a common acquisition objective, the aggregate 26% crosses the trigger and the whole arrangement becomes an open offer situation.

Concert can arise from formal shareholders’ agreements, voting undertakings, financing arrangements, or even a demonstrable common understanding without a written contract. Certain relationships, such as those between an entity and its holding, subsidiary or associate companies, or between promoters of the same company, are treated as concert unless rebutted. Practical documentation discipline is therefore essential: transaction counsel should map every co-investor, financing party and related entity, record the intended relationship, and preserve evidence that establishes or rebuts concert as the structuring requires. Failure to identify a concert party correctly is one of the most common and expensive errors in Indian takeover practice.

Open offer price, rules, formula and a worked example

Once a trigger is identified, the next question is what price the acquirer must offer to public shareholders. Open offer price calculation india is governed by a “highest-of” formula under the SAST Regulations, designed to ensure public shareholders receive no less than the best price the acquirer or the market has recently recognised.

The precise references and lookback windows must be taken from the regulation text on the SEBI site, but the structure of the test is as follows: the offer price is the highest of the several statutory price benchmarks, which typically include the negotiated price under the acquisition agreement, the volume-weighted average price paid by the acquirer (and PAC) during the specified lookback period, the highest price paid by the acquirer during the relevant period, and the market-price averages measured over defined periods preceding the public announcement.

Relevant acquisition period and price references

The pricing exercise turns on the “relevant date”, generally tied to the date of the public announcement, and on the lookback windows that flow backward from it. The calculation is a disciplined, step-by-step process rather than a single number:

1. Fix the relevant date by reference to the public announcement.
2. Identify the negotiated price payable under the acquisition agreement or memorandum.
3. Determine the highest price paid, and the volume-weighted average price paid, by the acquirer and PAC for any acquisition during the statutory lookback period.
4. Compute the volume-weighted average market price of the shares over the statutory reference periods preceding the public announcement, using traded data from the exchanges.
5. Select the highest of these figures as the open offer price.

Where shares are infrequently traded, or where the acquisition is indirect, the regulations provide adjusted parameters, another reason to work directly from the current regulation clauses rather than a summary.

Minimum offer size and acceptance conditions

The open offer is not a token gesture: the SAST code prescribes a minimum offer size expressed as a percentage of the target’s voting capital that the acquirer must offer to acquire from public shareholders. If public shareholders tender more shares than the minimum offer size, the acquirer accepts shares on a proportionate basis, meaning each tendering shareholder has a corresponding fraction of their tendered shares accepted. This proportionate-acceptance mechanism protects small shareholders from being crowded out and gives the acquirer certainty about the maximum outlay. The minimum offer percentage and the treatment of over-subscription are set out in the regulation text and should be cited precisely in the offer documents.

Worked numeric example

The following illustration shows how the mechanics fit together. The numbers are illustrative only and are used to demonstrate method, not to state regulatory thresholds; the statutory percentages must be read from the current SAST Regulations.

• Facts. An acquirer agrees to buy a 26% stake from promoters at a negotiated price of ₹120 per share. Over the relevant lookback period the highest price the acquirer paid in the market was ₹115. The volume-weighted average market price over the statutory reference period works out to ₹110.
• Step 1, apply the highest-of test. Compare the negotiated price (₹120), the highest price paid (₹115) and the market average (₹110). The highest is ₹120, so the open offer price is ₹120 per share.
• Step 2, size the offer. Assume the target has 100 million shares and the statutory minimum offer size requires the acquirer to offer to acquire, say, 26 million shares from the public. The maximum consideration payable for the open offer is therefore 26,000,000 × ₹120 = ₹312 crore.
• Step 3, compute the escrow. The acquirer must deposit into an escrow account a sum calculated as a tiered percentage of the total consideration, as prescribed by the SAST Regulations, before the public announcement window closes. The regulations apply a higher percentage to a first band of consideration and a lower percentage to the balance, the exact tiering and thresholds must be read from the regulation and confirmed with the manager and banker to the offer.

The key discipline is that the escrow must be funded and the security instruments in place before, not after, the announcement, a sequencing error here can invalidate the offer timetable and attract regulatory scrutiny.

Exemptions and permitted transfers, how to lawfully avoid an offer

Not every acquisition that crosses a numeric threshold requires an open offer. The SAST Regulations recognise a defined set of exemptions and permitted transfers where the policy rationale for a public exit does not apply, typically because there is no genuine change of control or the transaction is intra-family or intra-group. Each exemption is conditional, and each carries documentation and filing requirements. The exemptions are a legitimate structuring resource, but they are strictly construed: an arrangement dressed up to fit an exemption but which in substance transfers control will not survive regulatory review.

Inter-se promoter transfers

Transfers of shares between promoters who have been named as such for a specified period, and among persons within the same promoter group, are commonly exempt from the open offer requirement where the transfer is bona fide and satisfies the regulation’s conditions. To rely on the exemption, the parties must generally make advance and post-transfer disclosures to the stock exchanges, satisfy any pricing conditions the regulation imposes, and preserve documentary evidence that the transferor and transferee are genuinely part of the promoter group. Typical evidence includes share-transfer documents, board and shareholder approvals where required, and undertakings filed with the exchanges, with disclosure formats available through the National Stock Exchange of India and BSE circulars.

Acquisitions under schemes of arrangement and court/tribunal orders

Acquisitions pursuant to a scheme of arrangement, amalgamation or reconstruction sanctioned by a court or the National Company Law Tribunal (NCLT) are exempt in defined circumstances, reflecting the fact that such schemes are subject to independent judicial and regulatory scrutiny. The scheme process itself, governed by the Companies Act, 2013 framework under the Ministry of Corporate Affairs and adjudicated by the NCLT, requires notice to regulators, creditor and shareholder approvals and tribunal sanction. Where the scheme meets the SAST conditions, no separate open offer arises, but the acquirer must confirm that the scheme falls squarely within the exemption and that any pre-scheme acquisitions do not independently trigger an offer.

Rights issues and bonus shares

Increases in shareholding that arise from a rights issue or bonus issue can be exempt, because the shareholder’s proportionate entitlement flows from the corporate action rather than from an active acquisition of another shareholder’s stake. However, the exemption is conditional. Where an acquirer subscribes to unsubscribed portions of a rights issue and thereby increases its holding beyond permitted limits, or where the increase results in the acquisition of control, the transaction can lose its exempt character and trigger an offer. The correct analysis is to test whether the increase is genuinely proportionate and non-dilutive of public shareholders and whether it independently crosses a trigger.

Timelines, disclosures and escrow, a procedural checklist

Once an open offer is triggered and the exemptions are exhausted, the transaction runs on a strict statutory timetable. The open offer timeline runs from the public announcement through to the closing of the tendering period, and every stage carries filing and disclosure obligations for the acquirer, the target and the promoters. The specific number of days for each stage is prescribed by the SAST Regulations and should be read from the current text.

Escrow and financial security

Before the offer proceeds, the acquirer must deposit security into an escrow account so that public shareholders are protected against non-payment. The escrow amount is calculated as a percentage of the total consideration payable under the offer, tiered so that a higher percentage applies to the first band of consideration and a lower percentage to the balance. Acceptable instruments typically include cash deposited with a scheduled commercial bank, a bank guarantee in favour of the manager to the offer, or deposit of frequently traded and freely transferable securities with an appropriate margin.

The escrow must be created not later than the timeline prescribed by the regulations in relation to the public announcement and maintained until obligations are discharged, the exact percentages and instrument rules are set out in the SAST procedural provisions and must be confirmed with the manager and banker to the offer.

Disclosure obligations

Open offer disclosures india run in parallel with the offer mechanics and also independently of any offer. Acquirers and shareholders crossing prescribed holding thresholds must make event-based disclosures, and persons holding above defined levels must make annual disclosures. The public announcement, detailed public statement and post-offer reports are themselves disclosure documents. Continuous disclosure under the LODR regime, filed through the exchanges, overlaps with SAST disclosure and must be reconciled so that the same acquisition is reported consistently across both regimes. Disclosure formats and filing routes are published by SEBI and the exchanges, and using the current forms is essential to avoid technical default.

Creeping acquisition limits explained

The creeping acquisition limit india rule allows an acquirer who already holds 25% or more, but below the maximum permissible non-public shareholding, to increase its holding by a limited percentage within a financial year without triggering a mandatory open offer. The allowance is measured across the financial year, which makes the timing of purchases a genuine planning variable: an acquirer can legitimately spread a larger consolidation across two financial years to stay within the annual creeping band each year, subject always to the event-based disclosure obligations that attach when holding thresholds are crossed.

What the creeping allowance does not permit is the acquisition of control, control passing still triggers an offer even where the incremental percentage sits within the creeping band.

Practical issues and pitfalls, enforcement, penalties and strategic drafting

The most damaging errors in takeover practice are structural rather than clerical. The recurring pitfalls are a failure to identify persons acting in concert (which understates the aggregate holding and misses a trigger), an incorrect pricing lookback (which produces an offer price below the statutory floor and exposes the acquirer to top-up liability), and late or inconsistent disclosures across the SAST and LODR regimes. Each of these attracts enforcement risk. SEBI can direct compliance, require a delayed open offer with interest, and impose monetary penalties under the SEBI Act, 1992; its orders and the appellate interpretations of the Securities Appellate Tribunal are the primary guide to how “control” and “concert” are applied in contested cases.

The practical mitigations are to build a concert-party map at the outset, to seek an informal guidance or exemption application from SEBI where a structure is borderline, to document the basis of any exemption contemporaneously, and to run the pricing calculation from the regulation text with the manager to the offer before signing.

Checklist for acquirers and targets

• Pre-deal diligence. Map existing shareholding, promoter group and any persons acting in concert; identify all governance rights that could amount to control.
• Trigger map. Test the transaction against the 25% threshold, the creeping band and the control trigger, on an aggregated basis.
• Pricing. Fix the relevant date, run the highest-of calculation from the regulation and reconcile with the negotiated price.
• Timeline planning. Schedule the PA, DPS, DLOF, SEBI observations and tendering windows before signing.
• Escrow funding. Confirm the escrow percentage, choose acceptable instruments and fund within the statutory window.
• Exemptions. Where relied upon, verify conditions and prepare the supporting documentation and disclosures.
• Shareholder communication and filings. Align SAST and LODR disclosures and use current exchange forms.

Further reading and authoritative sources

For the primary regulation text, circulars and FAQs, work from the SEBI portal; for scheme and Companies Act interaction, the MCA portal; for disclosure formats, the NSE and BSE circulars; and for enforcement precedent, the SAT orders portal.

Exemptions and trigger comparison

The table below consolidates the most common scenarios so deal teams can quickly locate a fact pattern and its compliance consequence.

Conclusion

Mastering open offer triggers india is the difference between a clean, well-sequenced control transaction and a deal that stalls under regulatory scrutiny. The disciplined approach is consistent across every scenario: map the aggregated shareholding and every person acting in concert, test the transaction against all three trigger families, calculate the offer price from the regulation’s highest-of formula, fund the escrow within the statutory window, and reconcile SAST and LODR disclosures. Where an exemption is available, document its conditions contemporaneously rather than reconstructing the rationale later. Because the SAST framework is periodically amended, every threshold and formula in this guide should be reconfirmed against the primary regulation text before filing, and where a structure is borderline on control or concert, seeking SEBI’s informal guidance is far cheaper than an enforcement dispute over open offer triggers india after the deal has closed.

Sources

1. Securities and Exchange Board of India (SEBI)
2. Ministry of Corporate Affairs (MCA)
3. National Stock Exchange of India (NSE)
4. BSE India
5. Securities Appellate Tribunal (SAT)
6. Legislative Department, Government of India
7. Supreme Court of India