UNITED STATES

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUER PURSUANT TO RULE 13a -16 OR

15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of June 2025

Commission File Number: 001-15002

ICICI Bank Limited
(Translation of registrant’s name into English)

ICICI Bank Towers,
Bandra-Kurla Complex
Mumbai, India 400 051
(Address of principal executive office)

Indicate by check mark whether the registrant files or will file
annual reports under cover Form 20-F or Form 40-F.

Table of Contents

Items:

OTHER NEWS

Subject: Disclosure under Indian Listing Regulations

IBN

ICICI Bank Limited (the ‘Bank’) Report on Form 6-K

The Bank has made the below announcement to the Indian stock exchanges:

ICICI Bank Limited (“Bank”) had, vide its disclosures dated April 19, 2025, communicated that its Board of Directors had approved a proposal for sale of the Bank’s entire shareholding of 18.8% in NIIT Institute of Finance Banking and Insurance Training Limited (“NIIT-IFBI” or “the company”), an associate of the Bank, to NIIT Limited.

The Bank has executed the share purchase agreement with NIIT Limited and NIIT- IFBI (“SPA”) today at 10.06 a.m. in relation to the above. In accordance with the SPA, the Bank has sold its entire shareholding of 18.8% in equity shares of NIIT-IFBI to NIIT Limited for a consideration of ₹ 61.1 million and consequently, NIIT-IFBI has ceased to be an associate of the Bank effective today.

Please take the above information on record.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorised.