SEBI Sets ISIN-Level Freeze Framework for Promoter Holdings During Buy-Backs

Buy-back controls move to the depository system

The Securities and Exchange Board of India has operationalised the freezing of holdings belonging to promoters, members of the promoter group and their associates at the ISIN level during a listed company’s buy-back process. The development directly affects listed companies undertaking buy-backs, their promoters, merchant bankers, depositories and the company secretarial and compliance teams responsible for executing such transactions.

SEBI issued the circular dated 21 July 2026, bearing reference number HO/49/14/13(11)2026-CFD-POD1/I/16864/2026. It operationalises Regulation 24(i)(ea) of the SEBI (Buy-back of Securities) Regulations, 2018 and requires the depositories to put the operational framework and necessary system enhancements in place before 1 August 2026.

The measure converts the regulatory restriction on promoter dealings during a buy-back into a depository-level control. Instead of depending only on undertakings, disclosures and post-transaction monitoring, the framework is intended to restrict dealings in the relevant security through the market infrastructure itself.

What the freeze covers

The freeze applies to the holdings of the promoter and promoter group, including their associates, in the security identified by its International Securities Identification Number, or ISIN. An ISIN-level freeze attaches the restriction to holdings in the relevant security, rather than imposing a general freeze on every security or asset held in the concerned demat accounts.

This distinction is significant. Promoters and connected entities may hold securities of several issuers in the same demat account. A security-specific restriction is designed to prevent transactions in the listed company’s affected shares or other specified securities without disabling unrelated holdings in that account.

The underlying rule provides for the freeze to operate from the date on which the board of directors or shareholders, as applicable, approve the buy-back proposal until closure of the buy-back offer. Consequently, promoter identification and the mapping of their holdings cannot be treated as a task to be completed only after the public announcement or opening of the offer.

A listed company must be ready to identify the relevant persons and communicate accurate information when the restriction is due to begin. Any delay, omission or mismatch could undermine the control precisely during the period for which the regulations require it.

Depositories to prescribe the operating process

SEBI’s circular places the operational burden on the depositories. They are expected to issue detailed guidelines for implementing the ISIN-level freeze and prescribe the format in which listed companies must submit instructions concerning promoter holdings.

The depository procedures are also expected to address two situations that require carefully controlled exceptions: tendering by promoters in a buy-back conducted through the tender-offer route, and the invocation or release of an encumbrance created before the buy-back period began.

These are not general exemptions from the restriction. In a tender offer, the system must permit promoter shares to be tendered to the extent participation is allowed under the applicable buy-back terms while continuing to prevent unrelated transfers. Similarly, where a pre-existing pledge or other encumbrance is invoked or released, the freeze is to continue on the affected shares or other specified securities after that event.

The practical purpose is to preserve the regulatory restriction even where the form of holding changes. An invocation may transfer the securities to another account, while a release may restore them to an unencumbered status. Neither event is intended, by itself, to make the securities freely transferable during the restricted period.

Why accurate promoter data now matters more

The framework makes the quality of promoter and associate data an immediate transaction-execution issue. Listed companies will need to reconcile the persons classified as promoters and promoter-group members in their regulatory filings with the demat-account and holding information required by the depositories.

The express inclusion of associates makes the exercise wider than simply extracting the names appearing under the promoter category in the latest shareholding pattern. Compliance teams will need to determine the covered universe under the applicable regulations and ensure that the information supplied for freezing is complete, current and supported by internal records.

Potential complications include holdings spread across multiple demat accounts, joint holdings, changes in promoter-group composition, corporate promoters with connected entities, and securities subject to existing pledges or other encumbrances. These issues should be resolved before approval of a proposed buy-back wherever possible, because the approval date itself can trigger the restricted period.

Promoters should also receive clear advance communication. Instructions already given to brokers, standing mandates or contemplated off-market transfers may conflict with the freeze once it becomes operative. While the depository control is intended to stop prohibited movements, the existence of a system restriction does not replace the need for the promoter and the listed company to comply with the substantive buy-back rules.

Implications for buy-back planning

For boards considering a buy-back, the operational timetable must now incorporate the freeze process from the outset. The company, merchant banker, registrar, depositories and stock exchanges may need coordinated and consistent information about the relevant ISIN, approval date, promoter universe, holdings and encumbrances.

Before the board or shareholder meeting that may approve the proposal, the company should verify promoter and promoter-group records, identify associates within the scope of the rule, obtain updated demat particulars and prepare an inventory of pre-existing encumbrances. The transaction team should also establish responsibility for submitting the freeze instruction and retaining evidence that it was accepted and implemented.

During the offer, any permitted tender by a promoter or action concerning an earlier encumbrance should be processed only through the prescribed route. An ordinary transfer instruction should not be assumed to qualify merely because its commercial purpose appears connected with the buy-back or a pledge.

At closure, de-freezing will also require procedural discipline. The company should confirm that the regulatory point of closure has been reached, complete the necessary communication through the prescribed channel and retain depository confirmations as part of the transaction record. Internal checklists should distinguish among approval, opening, tendering, closure and post-buy-back compliance rather than treating the exercise as a single event.

A preventive compliance control

The development reflects a broader regulatory preference for technology-based preventive controls in the securities market. A depository-level freeze can reduce the risk that an impermissible transfer is completed and discovered only through later scrutiny. It can also produce a clearer electronic trail showing when the restriction was applied, what security it covered and when it was removed.

However, automation depends on the accuracy and timeliness of the underlying data. An incomplete list may leave relevant holdings outside the restriction, while an incorrect inclusion may constrain a person who should not have been covered. Listed entities therefore need an escalation process for discrepancies and should not regard submission of a file to the depository as the end of their compliance responsibility.

For finance and governance professionals, the principal change is operational rather than merely documentary. Buy-back preparation must now connect corporate approvals, regulatory classification, beneficial ownership information and depository execution within a single control process.

Key takeaway

SEBI’s ISIN-level framework makes promoter-holding restrictions during buy-backs an infrastructure-enforced control: listed companies should validate the full promoter, promoter-group and associate universe before approval, map all relevant demat holdings and encumbrances, and coordinate timely freezing and de-freezing through the prescribed depository process.