Hester Biosciences Ltd — Capital/Financing Update 2026

May 20, 2026

HESTER

Hester Biosciences Limited

HQ and Registered Office

Village Meda-Adraj

Taluka Kadi

District Mehsana

Gujarat 384441, India

Phone +91 2764 285 502

+91 2764 285 453

Ahmedabad Office

Pushpak, 1st Floor

Panchvati Circle

Motilal Hirabhai Road

Ahmedabad 380006

Gujarat, India

Phone +91 79 264 45106

Email mail@hester.in

www.hester.in

CIN L99999GJ1987PLC022333

20 May 2026

To,

BSE Limited

Phiroze Jeejeebhoy Towers,

Dalal Street,

Mumbai 400 001

Scrip Code: 524669

To,

National Stock Exchange of India Limited

Exchange Plaza,

Bandra - Kurla Complex,

Bandra (E), Mumbai 400 051

Symbol: HESTERBIO

Dear Sir/ Madam:

Subject: Disclosure under Regulation 30 of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 (as amended)

Pursuant to Regulation 30 read with Schedule III of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, we wish to inform you that amendments/modifications have been executed to the existing Loan Agreement entered into between Hester Biosciences Africa Limited ("Borrower"), a wholly-owned subsidiary of Hester Biosciences Limited ("Hester India"), and Gates Foundation ("Lender"), originally executed in the year 2018, Hester India provided a corporate guarantee in relation to the said loan facility extended to Hester Africa.

The broad terms of the Loan amendment agreement are as under:

Name of borrower entity	Hester Biosciences Africa Limited, Tanzania
Relationship with listed entity	Wholly-owned Subsidiary of the Company
Name of lenders	Gates Foundation, United States of America
Existing outstanding facilities	USD 12 million
Revised terms and conditions	1. Outstanding loan reduced to USD 5 million
2. Waived the accrued interest amounts
3. No interest on further loan amount
4. Revision in loan repayment schedule
Nature of Amendments/ Changes	The amendments include the extension of tenor, revision of repayment schedule and change in interest terms
Guarantee by listed entity	Corporate guarantee provided by the Company continues / stands modified pursuant to the amended agreement
Impact of such guarantee on listed entity	The amendments is expected to improve the liquidity and debt servicing position of the subsidiary. The Company's exposure remains limited to the corporate guarantee obligations already disclosed/contracted.

The disclosure is being made in view of the Company's obligations as guarantor and the potential impact thereof on the Company and its wholly owned subsidiary.

You are requested to take the above information on your record.

Sincerely

For Hester Biosciences Limited

Vinod Mali

Digitally signed by Vinod Mali

Date: 2026.05.20

15:49:23 +03'30'

Vinod Mali

Company Secretary & Compliance Officer