[6-K] KB Financial Group Inc. Current Report (Foreign Issuer)

Rhea-AI Filing Summary

KB Financial Group Inc. (KB) reported a change in its largest shareholder’s stake. The Korean National Pension Service increased its holdings from 31,601,545 common shares, representing 8.28% of total shares as of September 30, 2025, to 32,666,149 common shares, representing 8.56% of 381,462,103 total shares based on the shareholder registry as of November 14, 2025.

This filing simply updates investors on the ownership level of the largest shareholder and does not describe any related transactions or strategic actions by the company.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 UNDER

THE SECURITIES EXCHANGE ACT OF 1934

For the month of November 2025

Commission File Number: 000-53445

KB Financial Group Inc.

(Translation of registrant’s name into English)

26, Gukjegeumyung-ro 8-gil, Yeongdeungpo-gu, Seoul 07331, Korea

(Address of principal executive office)

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

Form 20-F ☒    Form  40-F ☐

Changes in the Number of Shares Owned by the Largest Shareholder of

KB Financial Group Inc.

On November 20, 2025, KB Financial Group Inc. (“KB Financial Group”) reported that the number of shares owned by its largest shareholder, the Korean National Pension Service, had increased from 31,601,545 shares of common stock, representing 8.28% of the total shares as of September 30, 2025, to 32,666,149 shares of common stock, representing 8.56% of 381,462,103 total shares based on the shareholder registry of KB Financial Group as of November 14, 2025.

SIGNATURES

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 authorized.

KB Financial Group Inc.

(Registrant)

Date: November 20, 2025						By: /s/ Sang Rok Na
						(Signature)
						Name: Sang Rok Na
						Title: Managing Director and Chief Financial Officer

FAQ

What change in ownership did KB Financial Group (KB) disclose in this 6-K?

KB Financial Group disclosed that its largest shareholder, the Korean National Pension Service, increased its holdings from 31,601,545 common shares (8.28% as of September 30, 2025) to 32,666,149 common shares (8.56% of 381,462,103 total shares as of November 14, 2025).

Who is the largest shareholder of KB Financial Group (KB)?

The largest shareholder of KB Financial Group is the Korean National Pension Service, which held 32,666,149 common shares, or 8.56% of 381,462,103 total shares, based on the shareholder registry as of November 14, 2025.

How large is the total share count of KB Financial Group mentioned in the filing?

The filing states that KB Financial Group had 381,462,103 total shares based on the shareholder registry as of November 14, 2025.

By how much did the Korean National Pension Service increase its shares in KB Financial Group?

The Korean National Pension Service increased its holdings from 31,601,545 to 32,666,149 common shares, an increase of 1,064,604 shares based on the figures disclosed.

Does this KB Financial Group 6-K describe any new corporate transactions or earnings results?

No. The 6-K focuses on changes in the number of shares owned by the largest shareholder and does not provide information about new transactions, earnings, or other operational developments.

Who signed the KB Financial Group 6-K report?

The report was signed on behalf of KB Financial Group Inc. by Sang Rok Na, who is identified as Managing Director and Chief Financial Officer.