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Glossary · Capital Markets

What is Lock-up undertaking?

An undertaking by existing shareholders and the issuer in an IPO not to sell their shares, or issue new shares, for a set period.

It aims to limit selling pressure on the share price after the IPO and protect investor confidence. Its duration and scope are disclosed in the prospectus, and its expiry may cause price volatility.

Source: SPK Payların Satışı Tebliği, halka arz uygulaması

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Last updated: November 8, 2026 · This definition is for general information only.

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