Submission of Intimation of Book Closure for the purpose of 40th Annual General Meeting to be held on Wednesday, 30th September, 2026 at 10.30 a.m.

Date:14th August, 2026 Listing Department, Bombay Stock Exchange Limited P.J. Towers, Dalal Street, Fort, Mumbai- 400 001. Ref: Supertex Industries Limited Scrip Code: 526133 Sub: Intimation of Book Closure and Cut-off Date pursuant to Regulation 42 of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 Dear Sir/Madam, We Wish to inform you that the Company has decided to close the Register of Members and Share Transfer Books from Thursday, 24th September, 2026 to Wednesday, 30th September, 2026 (both days inclusive) for the purpose of the 40th Annual General Meeting of the Company scheduled to be held on Wednesday, 30th September 2026 at 10.30 am at the registered office of the Company at Plot No. 45-46 Phase II, Piperia Industrial Estate, Silvassa- 396230. The Company has fixed Wednesday, 23rd September, 2026 as the “Cut-off date” for the purpose of e-voting for the 40th Annual General Meeting of the Company. Kindly take the same on your records. Yours faithfully, For Supertex Industries Limited Sanjay Kumar Mishra Director & CFO DIN:00304796