Trading Window

12704 02 :1,7 NI~1qig .sTct, Mazagon Dock Shipbuilders Ltd. (Formerly Mazagon Dock Limited) (A Govt. ofIndia Undertaking) siz’~4IJ ~, gi~i~ug, W-400 010 Dockyard Road, Mazagon, Mumbai -400 010 certified ISO 9001 Company CIN :L35100MH1934G01002Q79 Ref. No.: SEC/BSENSEDISCL/16/2026-27 Date: 25 June 2026 To To BSE Limited National Stock Exchange ofIndia Limited Phiroze Jeejeebhoy Towers Exchange Plaza, C-I, Block 0 Dalal Street Bandra Kurla Complex Mumbai -400001 Bandra (E), Mumbai -400051 Scrip Code: 543237 NSF Symbol: MAZDOCK Subject: Intimation of Closure of Trading Window under the SEBI (Prohibition of Insider Trading) Regulations, 2015 for the quarter ending on 30 June 2026, Dear Sir! Madam, Please be informed that, pursuant to the Code ofConduct for Prohibition ofInsider Trading in dealing with the securities ofMazagon Dock Shipbuilders Limited (Company) read with applicable provisions of the SEBI (Prohibition of Insider Trading) Regulations, 2015 as amended, the trading window for dealing in securities ofthe company by Designated Persons and their immediate relatives, shall remain closed with effect from01 July 2026till the end of48 hours afterthedeclarationofthe Financial Results ofthe company for the quarter and period ending on 30 June 2026. The date of Board meeting for consideration of the Financial Results of the Company for the quarter and period ending on 30 June 2026 shall be intimated in due course. This is for your information and record. Thanking You, Yours Faithfully, For MAZAGON DOCK SHIPBUILDERS LIMITED Lalatendu Acharya Company Secretary and Compliance officer qft~ +91(22) 2376 2000 *~ (Design) +91(22) 2373 8159 (Proj-C) +91(22) 2373 8147 www.mazdock.com phone+91(22) 2376 3000 Fax (Material)+91(22) 2373 8151 (East Yd.)+91(22) 2373 8333 Website : www.mazdoclc.com IRQS +91(22) 2376 4000 (Finance)+91(22) 2373 8338 AOSPARTMSNTOF IIIDIANREO$SISROF SHIPPING