6-K

UNITED STATES

SECURITIES ANDEXCHANGE COMMISSIONWashington, D.C. 20549

FORM 6-K

REPORT OF FOREIGNISSUER PURSUANT TO RULE 13a -16 OR

15d-16 UNDER THESECURITIES EXCHANGE ACT OF 1934

For the month of September 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:Board Meeting for approval of Financial Results

IBN

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

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

Pursuant to the applicable provisions of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, we wish to inform you that the meeting of the Board of Directors of the Bank is scheduled to be held on Saturday, October 18, 2025, to, inter alia, consider and approve the unaudited financial results (standalone and consolidated) for the quarter and six months ending September 30, 2025.

In view of the above and pursuant to the provisions of the SEBI (Prohibition of Insider Trading) Regulations, 2015 read with ICICI Bank Code on Prohibition of Insider Trading, the Trading Window for dealing in the securities of the Bank will remain closed for all Designated Persons of the Bank (including Directors) and their immediate relatives from October 1, 2025 to October 20, 2025 (both days inclusive).

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.