Form 6-K

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 July 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 ☐

Preliminary Operating Results for the First Half of 2025

On July 24, 2025, KB Financial Group Inc. (“KB Financial Group”) held an earnings conference and released its preliminary operating results for the first half of fiscal year 2025. The following tables reflect the key figures released during the conference. The presentation materials for the conference, which contain further details, are available at KB Financial Group’s website (http://www.kbfg.com).

The preliminary figures presented herein are based on International Financial Reporting Standards as adopted by the Republic of Korea (“K-IFRS”) and are currently being reviewed by KB Financial Group’s independent auditors and are therefore subject to change.

1.	Preliminary Operating Results of KB Financial Group (Consolidated)


(Won in millions, %)		2Q 2025		1Q 2025		% Change Increase (Decrease) (Q to Q)			2Q 2024		% Change Increase (Decrease) (Y to Y)
Operating revenue	Specified Quarter		24,200,489		19,743,968		22.57			19,911,241		21.54
Operating revenue	Cumulative		43,944,457		19,743,968		—			43,258,186		1.59
Net operating profit	Specified Quarter		2,132,971		2,293,028		(6.98	)		2,302,748		(7.37	)
Net operating profit	Cumulative		4,425,999		2,293,028		—			4,648,307		(4.78	)
Profit before income tax	Specified Quarter		2,343,141		2,306,606		1.58			2,369,731		(1.12	)
Profit before income tax	Cumulative		4,649,747		2,306,606		—			3,767,326		23.42
Profit for the period	Specified Quarter		1,747,580		1,699,122		2.85			1,710,904		2.14
Profit for the period	Cumulative		3,446,702		1,699,122		—			2,766,967		24.57
Profit attributable to shareholders of the parent company	Specified Quarter		1,738,422		1,697,271		2.42			1,732,449		0.34
	Cumulative		3,435,693		1,697,271		—			2,774,431		23.83


Notes: 1)		“Operating revenue” represents the sum of interest income, fee and commission income, insurance income, reinsurance income, gain on financial assets/liabilities at fair value through profit or loss, other insurance finance income and other operating income.
2)		KB Financial Group’s operating results for the second quarter of 2024 have been adjusted retroactively to reflect certain communications with the Financial Supervisory Service regarding the application of K-IFRS 1117 (Insurance Contracts).

2.	Preliminary Operating Results of Kookmin Bank (Consolidated)


(Won in millions, %)		2Q 2025		1Q 2025		% Change Increase (Q to Q)		2Q 2024		% Change Increase (Decrease) (Y to Y)
Operating revenue	Specified Quarter		14,169,626		10,811,411		31.06		11,822,663		19.85
Operating revenue	Cumulative		24,981,037		10,811,411		—		26,225,673		(4.75	)
Net operating profit	Specified Quarter		1,556,425		1,388,909		12.06		1,421,558		9.49
Net operating profit	Cumulative		2,945,334		1,388,909		—		2,861,951		2.91
Profit before income tax	Specified Quarter		1,537,223		1,374,025		11.88		1,510,892		1.74
Profit before income tax	Cumulative		2,911,248		1,374,025		—		2,007,517		45.02
Profit for the period	Specified Quarter		1,152,065		1,017,775		13.19		1,089,094		5.78
Profit for the period	Cumulative		2,169,840		1,017,775		—		1,466,347		47.98
Profit attributable to shareholders of the parent company	Specified Quarter		1,161,173		1,026,432		13.13		1,116,338		4.02
	Cumulative		2,187,605		1,026,432		—		1,505,873		45.27

Note:

“Operating revenue” represents the sum of interest income, fee and commission income, gain on financial assets/liabilities at fair value through profit or loss and other operating income.

3.	Preliminary Operating Results of KB Securities Co., Ltd. (“KB Securities”) (Consolidated)


(Won in millions, %)		2Q 2025		1Q 2025		% Change Increase (Decrease) (Q to Q)			2Q 2024		% Change Increase (Decrease) (Y to Y)
Operating revenue	Specified Quarter		3,216,537		2,988,287		7.64			2,273,350		41.49
Operating revenue	Cumulative		6,204,824		2,988,287		—			5,733,464		8.22
Net operating profit	Specified Quarter		218,043		224,611		(2.92	)		243,362		(10.40	)
Net operating profit	Cumulative		442,654		224,611		—			496,699		(10.88	)
Profit before income tax	Specified Quarter		221,672		238,848		(7.19	)		233,655		(5.13	)
Profit before income tax	Cumulative		460,520		238,848		—			476,699		(3.39	)
Profit for the period	Specified Quarter		160,658		181,703		(11.58	)		180,614		(11.05	)
Profit for the period	Cumulative		342,361		181,703		—			379,467		(9.78	)
Profit attributable to shareholders of the parent company	Specified Quarter		160,335		181,262		(11.55	)		179,528		(10.69	)
	Cumulative		341,597		181,262		—			378,863		(9.84	)


Notes: 1)		The above figures are based on KB Securities’ consolidated financial statements, as a result of which the figures may differ from KB Securities’ earnings results to be released at KB Financial Group’s earnings conference for the first half of 2025, which are based on KB Financial Group’s consolidated financial statements.
2)		“Operating revenue” represents operating income based on KB Securities’ financial statements.

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: July 24, 2025				By: /s/ Sang Rok Na
				(Signature)

				Name: Sang Rok Na
				Title: Managing Director and Chief Financial Officer