Intimation of closure of Trading Window in connection with declaration of Financial Results for the quarter & half year ending September 30, 2026.

SEC/058/2026-27 September 24, 2026 Listing Department Listing Department BSE Limited The National Stock Exchange of India Limited th Exchange Plaza, C-1, Block G, 25 Floor, Phiroze Jeejeebhoy Towers Bandra Kurla Complex, Bandra Dalal Street, Fort (E), Mumbai - 400 051 Mumbai - 400 001 SYMBOL: MASTEK SCRIP CODE: 523704 ISIN: INE759A01021 Dear Sir(s) / Ma’am(s), Sub: Intimation of closure of Trading Window This is to inform you that in compliance with the SEBI (Prohibition of Insider Trading) Regulations, 2015, as amended, and in compliance with the Company’s “Code for Regulating, Monitoring and Reporting of trading by designated persons and their immediate relatives” the trading window for dealing in the shares of the Company shall remain closed, in connection with the declaration of unaudited financial results of the Company for the second quarter & half year ending September 30, 2026, as per the following details: From September 30, 2026 To Till 48 hours after the declaration and submission of unaudited financial results for the second quarter & half year ending September 30, 2026, to the Stock Exchanges The Company will communicate about the said closure of the trading window to the Designated Persons of the Company, including their respective immediate relatives, in accordance with the Code of Conduct. The date of the proposed Board Meeting for the aforesaid purpose will be communicated in due course of time. Request you to take note of the above. Thanking you. Yours faithfully, For Mastek Limited Reena Raje Company Secretary and Compliance Officer Membership No. A21440 Mastek Limited 804/805, President House, Opp. C. N. Vidyalaya, Near Ambawadi Circle, Ahmedabad – 380 006 Tel: +91-79-2656-4337 | Email: info@mastek.com | Web: www.mastek.com | CIN: L74140GJ1982PLC005215