General Updates

Date: September 9, 2026 The General Manager, The Manager, Listing Department, Listing & Compliance Department, Bombay Stock Exchange Limited, National Stock Exchange of India Limited Phiroze Jeejeebhoy Towers, Exchange Plaza, Plot no. C/1, G Block, Dalal Street, Bandra Kurla Complex, Mumbai – 400 001 Bandra East, Mumbai – 400 051 Scrip Code: 543669 Scrip Symbol: RUSTOMJEE Dear Sir / Madam, Subject- Disclosure under Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 In terms of Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, we wish to inform you that Keystone Realtors Limited (“the Company”) has jointly incorporated a new Limited Liability Partnership viz. One Landmark House LLP, having 50% profit sharing ratio, for an initial investment of Rs. 50,000/- (Fifty Thousand only). In this regard, we hereby enclose the necessary details in Annexure I as required under the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015. This is for your information and records. Thanking you, Yours faithfully, For Keystone Realtors Limited Bimal K Nanda Company Secretary and Compliance Officer Membership No. ACS – 11578 Encl: As above KEYSTONE REALTORS LIMITED Registered Office: 702, NATRAJ, M. V. Road Junction, Western Express Highway, Andheri (East), Mumbai-400069. Tel.: +912266766888 | CIN: L45200MH1995PLC094208| Website:www.rustomjee.com Annexure A a) Name of the target entity, details in One Landmark House LLP is Limited Liability brief such as size, turnover etc. Partnership, incorporated on September 8, 2026, for real estate business. Being new incorporation, Turnover is NIL. b) whether the acquisition would fall No within related party transaction(s) and whether the promoter/ promoter group/ group companies have any interest in the entity being acquired? If yes, nature of interest and details thereof and whether the same is done at “arm’s length” c) industry to which the entity being Real Estate acquired belongs d) objects and impact of acquisition Expansion of Business (including but not limited to, disclosure of reasons for acquisition of target entity, if its business is outside the main line of business of the listed entity) e) brief details of any governmental or No regulatory approvals required for the acquisition f) Indicative time period for completion Not Applicable of the acquisition g) consideration - whether cash Rs. 50,000/- (Contribution as Partner) consideration or share swap or any other form and details of the same h) Cost of acquisition and/or the price Not applicable at which the shares are acquired i) Percentage of shareholding / control 50% Profit Sharing acquired and / or number of shares acquired j) brief background about the entity Not Applicable acquired in terms of products/line of business acquired, date of incorporation, history of last 3 years turnover, country in which the acquired entity has presence and any other significant information (in brief) KEYSTONE REALTORS LIMITED Registered Office: 702, NATRAJ, M. V. Road Junction, Western Express Highway, Andheri (East), Mumbai-400069. Tel.: +912266766888 | CIN: L45200MH1995PLC094208| Website:www.rustomjee.com