IBN 6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUER PURSUANTTO RULE 13a -16 OR

15d-16 UNDER THE SECURITIESEXCHANGE ACT OF 1934

For the month of July 2026

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:

1. Others

OTHERNEWS

Subject: Disclosureunder 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:

In continuation to the disclosure made by ICICI Bank Limited (“Bank”) earlier in the day, please note that Moody’s Ratings and S&P Global Ratings have vide letters dated July 24, 2026, assigned ‘Baa3’ and ‘BBB’ rating respectively to the USD denominated Senior Unsecured Fixed Rate Notes (“Notes”) issued by ICICI Bank Limited, acting through its IFSC Banking Unit, under the Bank’s Global Medium Term Note Programme.

NOT FOR DISTRIBUTIONIN THE UNITED STATES

Thisdocument is not an offer of securities for sale in the United States. Any securities referred to herein have not been and will not beregistered under the United States Securities Act of 1933, as amended (the “Securities Act”) or any United States state securitieslaws, and may not be offered or sold in the United States except pursuant to an exemption from, or in a transaction not subject to, theregistration requirements of the Securities Act and in accordance with any applicable United States state securities laws. There is nointention to register any securities referred to herein in the United States or to make a public offering of the securities in the UnitedStates. This document does not constitute an offer to sell or the solicitation of an offer to buy the Notes described herein

You are requested to take note of the same and bring it to the notice of all concerned.

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.