please find attached the credit rating received from ICRA

Ref: DEL/SEC/2026/08/04 Date: August 26, 2026 Department of Corporate Services/Listing BSE Limited Phiroze Jeejeebhoy Towers Dalal Street, Fort Mumbai – 400 001 BSE Scrip Code: 504908 Dear Sir/ Madam, Sub: Intimation of Credit Rating Ref: Regulation 30 of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015 (“SEBI Listing Regulations”) Pursuant to Regulation 30 of the SEBI Listing Regulations, it is hereby informed that ICRA has published the following rating on August 25, 2026 as per below details: Instrument Rated Amount Rating Action (Rs. Crore) Long term – Fund based – 14.00 [ICRA]BBB+(Stable); Cash credit Reaffirmed/Assigned for enhanced amount Short term – non-fund based 14.50 [ICRA]A2; – Others Reaffirmed/Assigned for enhanced amount Total 28.50 This Intimation will also be uploaded on company’s website at https://duncanengg.com/investor/details/regulations-46-62-sebi-credit-ratings This is for your kind information and necessary records. Thanking you. For Duncan Engineering Limited Shanu Gupta Company Secretary and Compliance Officer Encl: as above ICRA Limited ICRA/Duncan Engineering Limited/25082026/1 Date: August 25, 2026 Mr. Kamal Saria Duncan Engineering Limited Office and Plant, F-33, MIDC, Ranjangaon, Karegoan, Tal-Shirur, Maharashtra 412209 Dear Sir, Re: ICRA's Credit Rating for below mentioned Instruments of Duncan Engineering Limited As per the Rating Agreement/Statement of Work executed with ICRA Limited, ICRA’s Rating Committee has taken the following rating actions for the mentioned instruments of your company. Rated Amount (Rs. Financial Sector Instrument Crore) Rating Action[1] Regulator# Long-term - Fund-based - Cash [ICRA]BBB+(Stable); Reaffirmed/Assigned for 14.00 RBI credit enhanced amount Short-term - Non-fund based - [ICRA]A2 ; Reaffirmed/Assigned for enhanced 14.50 RBI Others amount Total 28.50 #SEBI’s grievance redressal/dispute resolution and SEBI investor protection mechanisms such as SCORES and ODR shall not be available for activities and instruments which fall under the regulatory purview of Financial Sector Regulators other than SEBI. The aforesaid rating(s) will become due for surveillance within one year from the date of rating communication letter. However, ICRA reserves the right to review and/or, revise the above rating(s) at any time based on new information becoming available, or the required information not being available, or other circumstances that ICRA believes could have an impact on the rating(s). Therefore, request the lenders and investors to visit ICRA website at www.icra.in for latest rating(s) of the company. The rating(s) are specific to the terms and conditions of the instruments as indicated to us by you, and any change in the terms or size of the same would require a review of the rating(s) by us. In case there is any change in the terms and conditions or the size of the rated instrument, the same must be brought to our notice before the instrument is used by you. In the event such changes occur after the rating(s) have been assigned by us and their use has been confirmed by you, the rating(s) would be subject to our review, following which there could be a change in the rating(s) previously assigned. Notwithstanding the foregoing, any change in the over-all limit of the instrument from that specified in this letter, would constitute an enhancement that would not be covered by or under the said Rating Agreement. [1]Complete definitions of the ratings assigned are available at www.icra.in Sensitivity Label : Confidential The rating(s) assigned must be understood solely as an opinion and should not be treated, or cause to be treated, as recommendation to buy, sell, or hold the rated instrument availed/issued by your company. You are also requested to forthwith inform us about any default or delay in repayment of interest or principal amount of the instrument rated, as above, or any other debt instruments/ borrowing and keep us informed of any other developments which may have a direct or indirect impact on the debt servicing capability of the company including any proposal for re-schedulement or postponement of the repayment programmes of the dues/ debts of the company with any lender(s) / investor(s), or occurrence of any significant development that could impact the ability of the company to raise funds such as restriction imposed by any authority from raising funds through issuance of debt securities through electronic bidding system. Further, you are requested to inform us immediately as and when the borrowing limit for the instrument rated, as above, or as prescribed by the regulatory authority(ies) is exceeded. We look forward to your communication and assure you of our best services. With kind regards Yours sincerely For ICRA Limited Prashant Vasisht Senior Vice President prashant.vasisht@icraindia.com Sensitivity Label : Confidential Annexure Details of Bank Limits Rated by ICRA Instrument Name Amount (Rs. Crore) Rating Rating Assigned On Kotak Mahindra Bank Limited Cash Credit 14.00 [ICRA]BBB+(Stable) August 14, 2026 Kotak Mahindra Bank Limited Non Fund-Based Facilities 14.50 [ICRA]A2 August 14, 2026 Total 28.50 Sensitivity Label : Confidential