Korean National Pension Service boosts KB Financial (KB) stake to 8.95% of shares

Rhea-AI Filing Summary

KB Financial Group Inc. reported a change in ownership by its largest shareholder, the Korean National Pension Service. The pension fund increased its holdings from 33,107,971 common shares, or 8.68% of total shares as of December 31, 2025, to 33,379,901 common shares, or 8.95% of 372,850,455 total shares based on the shareholder registry as of February 27, 2026.

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 March 2026

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 March 10, 2026, 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 33,107,971 shares of common stock, representing 8.68% of the total shares as of December 31, 2025, to 33,379,901 shares of common stock, representing 8.95% of 372,850,455 total shares based on the shareholder registry of KB Financial Group as of February 27, 2026.

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: March 10, 2026				By:		/s/ Sang Rok Na
				(Signature)
				Name: Sang Rok Na
				Title: Senior Managing Director and Chief Financial Officer

FAQ

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

KB Financial Group disclosed that its largest shareholder, the Korean National Pension Service, increased its stake to 33,379,901 common shares. This represents 8.95% of 372,850,455 total shares based on the shareholder registry as of February 27, 2026.

Who is the largest shareholder of KB Financial Group Inc. (KB) according to the filing?

The largest shareholder is the Korean National Pension Service. The filing states it holds 33,379,901 common shares of KB Financial Group, representing 8.95% of 372,850,455 total shares recorded in the shareholder registry as of February 27, 2026.

How many KB Financial Group shares did the Korean National Pension Service own before the increase?

Before the increase, the Korean National Pension Service owned 33,107,971 common shares of KB Financial Group. This earlier position represented 8.68% of the company’s total shares as of December 31, 2025, according to the disclosed figures.

What percentage of KB Financial Group (KB) does the Korean National Pension Service now own?

The Korean National Pension Service now owns 8.95% of KB Financial Group. This percentage corresponds to 33,379,901 common shares out of 372,850,455 total shares, based on the company’s shareholder registry as of February 27, 2026.

What total share count did KB Financial Group report in the shareholder registry?

KB Financial Group reported 372,850,455 total shares in its shareholder registry. This figure is used in the filing to calculate the Korean National Pension Service’s updated ownership percentage of 8.95% as of February 27, 2026.

Which period does the earlier ownership percentage for KB’s largest shareholder relate to?

The earlier ownership percentage of 8.68% for the Korean National Pension Service relates to December 31, 2025. At that time, the pension fund held 33,107,971 common shares of KB Financial Group, as specified in the disclosure.