KB Financial Group (KB) corrects filing on largest shareholder’s decreased stake

Rhea-AI Filing Summary

KB Financial Group Inc. filed an amended foreign issuer report to correct a wording error about its largest shareholder’s stake. The report clarifies that the Korean National Pension Service’s holdings had decreased, not increased. Its ownership moved from 33,505,649 common shares (8.99% as of March 31, 2026) to 33,460,006 common shares (8.97% of 372,850,455 total shares based on the May 8, 2026 shareholder registry).

Key Figures

Previous NPS holdings: 33,505,649 shares Updated NPS holdings: 33,460,006 shares Total shares outstanding: 372,850,455 shares +1 more

4 metrics

Previous NPS holdings 33,505,649 shares Common shares, 8.99% ownership as of March 31, 2026

Updated NPS holdings 33,460,006 shares Common shares, 8.97% of total shares based on May 8, 2026 registry

Total shares outstanding 372,850,455 shares Shareholder registry of KB Financial Group as of May 8, 2026

Form type Form 6-K/A Amended report of foreign private issuer correcting clerical error

Key Terms

Form 6-K/A, foreign private issuer, largest shareholder, shareholder registry

4 terms

Form 6-K/A regulatory

"This Report of Foreign Private Issuer on Form 6-K/A (this “Amended Report”)"

Form 6-K/A is an amended report filed with the U.S. Securities and Exchange Commission by a foreign (non‑U.S.) company to correct or add material information previously sent in a Form 6‑K. It matters to investors because it updates the official public record—think of it as a corrected or expanded page in a company’s disclosure file—so the new or corrected details can affect how investors judge the company’s risks, results or future prospects.

foreign private issuer regulatory

"REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16"

A foreign private issuer is a company organized outside the United States that meets tests showing it is primarily foreign-controlled and therefore qualifies for a different set of U.S. reporting rules. For investors, that means the company files less frequent or differently formatted disclosures with U.S. regulators and may follow home-country accounting and governance practices, so buying its stock is like dining at a well-reviewed restaurant that follows its home kitchen’s rules instead of the local menu — you get access but should check what standards apply.

largest shareholder financial

"Changes in the Number of Shares Owned by the Largest Shareholder of KB Financial Group Inc."

shareholder registry financial

"based on the shareholder registry of KB Financial Group as of May 8, 2026"

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K/A

REPORT OF FOREIGN PRIVATE ISSUER

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

THE SECURITIES EXCHANGE ACT OF 1934

For the month of May 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 ☐

EXPLANATORY NOTE

This Report of Foreign Private Issuer on Form 6-K/A (this “Amended Report”) is furnished to amend the Report of Foreign Private Issuer furnished to the Securities and Exchange Commission on May 18, 2026 under the title “Changes in the Number of Shares Owned by the Largest Shareholder of KB Financial Group Inc.” (the “Original Report”) solely to correct a clerical error, revising “had increased” to “had decreased.” No other changes to the Original Report are made by this Amended Report.

The entirety of the Original Report shall be amended and replaced as follows:

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

KB Financial Group Inc.

On May 18, 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 decreased from 33,505,649 shares of common stock, representing 8.99% of the total shares as of March 31, 2026, to 33,460,006 shares of common stock, representing 8.97% of 372,850,455 total shares based on the shareholder registry of KB Financial Group as of May 8, 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: May 19, 2026		By:		/s/ Sang Rok Na
		(Signature)
		Name: Sang Rok Na
		Title: Senior Managing Director and Chief Financial Officer

FAQ

What does KB Financial Group Inc.'s May 2026 Form 6-K/A report change?

The report corrects a wording error, clarifying that the Korean National Pension Service’s shareholding had decreased rather than increased. It replaces the earlier Form 6-K while keeping all other information the same.

How many KB Financial Group shares did the Korean National Pension Service previously hold?

KB Financial Group reported the Korean National Pension Service previously held 33,505,649 common shares. This represented 8.99% of the company’s total shares as of March 31, 2026, before the reported decrease.

What is the Korean National Pension Service’s updated stake in KB Financial Group?

After the change, the Korean National Pension Service held 33,460,006 common shares of KB Financial Group. This represented 8.97% of 372,850,455 total shares, based on the shareholder registry dated May 8, 2026.

Who is identified as the largest shareholder of KB Financial Group Inc. in this filing?

The filing identifies the Korean National Pension Service as KB Financial Group’s largest shareholder. The report focuses on a small decrease in its common share holdings and the corresponding percentage ownership figures.

Why did KB Financial Group file an amended Form 6-K/A in May 2026?

KB Financial Group filed the amended report solely to correct a clerical error in the earlier submission. The phrase “had increased” was revised to “had decreased,” with no other changes to the original disclosure.

What total share count did KB Financial Group use to calculate ownership percentages?

Ownership percentages were calculated using 372,850,455 total shares. This total is based on KB Financial Group’s shareholder registry as of May 8, 2026, and underpins the reported 8.97% stake for the Korean National Pension Service.