SEBI issued Circular No. HO/49/14/13(11)2026-CFD-POD1/I/16864/2026 on July 21, 2026, operationalising the freezing of promoter and promoter group holdings — including associates — at the ISIN level during buy-back periods. This implements Regulation 24(i)(ea) of the SEBI (Buy-back of Securities) Regulations, 2018. The freeze prevents promoters from selling or transferring shares during an open-market buy-back window, strengthening market integrity and preventing insider advantage during company-initiated repurchases.

When a listed company undertakes a buy-back of its own shares — particularly through the open market route — there is an inherent conflict of interest risk: promoters could simultaneously sell their holdings in the market while the company is buying shares, effectively offloading their stake at artificially supported prices. To plug this regulatory gap, SEBI introduced Regulation 24(i)(ea) in the Buy-back Regulations, 2018, which mandates that promoter holdings be frozen during the buy-back window.

The July 2026 circular takes this a step further by operationalising the freeze at the ISIN (International Securities Identification Number) level. This is technically significant: previously, a blanket freeze could be applied to an entire demat account, which raised operational complexities. An ISIN-level freeze is surgical — it locks only the specific security being bought back, while allowing the promoter to trade other securities in the same demat account.

This approach aligns with global best practices where insider-related trading restrictions are targeted rather than blanket. For depositories (NSDL and CDSL), it requires system-level upgrades to implement security-specific holds on demat accounts. For exchanges and RTAs, coordination protocols must be established.

From a market integrity standpoint, this circular is critical: it ensures buy-backs serve their stated purpose — returning surplus cash to shareholders equitably — rather than becoming a price-support mechanism that selectively benefits promoters. SEBI Grade A candidates must understand both the regulatory provision and the operational mechanism behind ISIN-level freezing.