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 January 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:

OTHER NEWS

Subject: Disclosure under Indian Listing Regulations

IBN

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

This is further to the disclosures made by ICICI Bank Limited (the Bank) on July 19, 2025, November 28, 2025 and January 6, 2026 regarding the proposed acquisition of 100% shareholding in ICICI Prudential Pension Funds Management Company Limited (ICICI PFM) from ICICI Prudential Life Insurance Company Limited (ICICI Life) to make ICICI PFM a wholly owned subsidiary of the Bank.

The Bank has executed the share purchase agreement (“SPA”) with ICICI Life and ICICI PFM today at 11:49 a.m. in relation to the above. Subsequently, all the formalities have been completed. The Bank now holds 100% shareholding in ICICI PFM and ICICI PFM has become a wholly owned subsidiary of the Bank.

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.