Sinch

Transaction in Own Shares • Dec 5, 2025

Flagging notification due to share repurchase

Stockholm, Sweden – 5 December 2025 – Sinch AB (publ), today announces, in accordance with Chapter 4, Section 18 of the Swedish Financial Instruments Trading Act (1991:980), that the company on 5 December 2025 repurchased 2,900,000 of its own shares.

Following the transaction, Sinch's total holding of treasury shares amounts to 43,275,143 corresponding to 5.12 percent of the total number of shares in the company, thereby exceeding the five percent threshold as set out in Chapter 4, Section 5 of the Act.

The repurchases are made in accordance with the Board's resolution to acquire own shares announced on 21 July 2025. The repurchases may continue from 23 July 2025 up until the 2026 Annual General Meeting. The purpose of the acquisition of own shares is to adapt the company's capital and share structure to contribute to increased shareholder value.

For further information, please contact

Mia Nordlander

Head of Investor Relations & Sustainability

Mobile: +46 73 511 53 95

E-mail: mia.nordlander@sinch.com

About Sinch

Sinch's vision is to connect every business with every customer, everywhere in the world. With the industry's most trusted foundation for intelligent customer communications, Sinch powers over 900 billion customer interactions annually for more than 190,000 customers across the globe. Leading global companies, including AI innovators, rely on Sinch to strengthen customer relationships and deliver seamless experiences across messaging, email, and voice. Profitable since its founding in 2008, Sinch generated net sales of USD 3 billion (SEK 28.7 billion) in 2024 and has over 4,000 employees in more than 60 countries, with headquarters in Stockholm. Sinch is listed on Nasdaq Stockholm (XSTO: SINCH). Visit us at sinch.com.

This information is information that Sinch AB (publ) is obliged to make public pursuant to the Financial Instruments Trading Act (1991:980). The information was submitted for publication, through the agency of the contact person set out above, at 18:00 CET, 5 December 2025.