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 April 2014

Commission File Number: 000-53445

KB Financial Group Inc.

(Translation of registrant’s name into English)

84, Namdaemoon-ro, Jung-gu, Seoul 100-703, 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  x            Form 40-F  ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):  ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):  ¨

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes  ¨            No   x

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82- N/A .

2014 First Quarter Preliminary Operating Results

On April 25, 2014, KB Financial Group Inc. (“KB Financial Group”) held an earnings conference and released its preliminary operating results for the first quarter of fiscal year 2014. 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 the International Financial Reporting Standards as adopted by the Republic of Korea (“K-IFRS”) and are currently being reviewed by our independent auditors and are subject to change.

1. Operating results of KB Financial Group (Consolidated)

(Won in millions, %)		1Q 2014		4Q 2013		% Change Increase (Decrease) (Q to Q)			1Q 2013		% Change Increase (Decrease) (Y to Y)
Operating revenue*	Specified Quarter		4,986,561		5,361,429		(6.99	%)		6,202,554		(19.60	%)
	Cumulative		4,986,561		22,597,188		—			6,202,554		(19.60	%)
Net operating profit	Specified Quarter		483,724		458,084		5.60	%		532,865		(9.22	%)
	Cumulative		483,724		2,026,992		—			532,865		(9.22	%)
Profit before income tax	Specified Quarter		498,427		368,679		35.19	%		547,736		(9.00	%)
	Cumulative		498,427		1,815,291		—			547,736		(9.00	%)
Profit for the period	Specified Quarter		373,525		258,965		44.24	%		412,916		(9.54	%)
	Cumulative		373,525		1,263,705		—			412,916		(9.54	%)
Profit attributable to shareholders of the parent company	Specified Quarter		373,525		258,965		44.24	%		411,458		(9.22	%)
	Cumulative		373,525		1,260,509		—			411,458		(9.22	%)

* 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.

2. Operating results of Kookmin Bank (Consolidated)

(Won in millions, %)		1Q 2014		4Q 2013		% Change Increase (Decrease) (Q to Q)			1Q 2013		% Change Increase (Decrease) (Y to Y)
Operating revenue*	Specified Quarter		3,774,007		4,095,114		(7.84	%)		4,862,670		(22.39	%)
	Cumulative		3,774,007		17,461,406		—			4,862,670		(22.39	%)
Net operating profit	Specified Quarter		322,356		352,173		(8.47	%)		376,063		(14.28	%)
	Cumulative		322,356		1,438,122		—			376,063		(14.28	%)
Profit before income tax	Specified Quarter		337,337		245,590		37.36	%		391,090		(13.74	%)
	Cumulative		337,337		1,211,611		—			391,090		(13.74	%)
Profit for the period	Specified Quarter		258,232		173,153		49.14	%		295,857		(12.72	%)
	Cumulative		258,232		819,719		—			295,857		(12.72	%)
Profit attributable to shareholders of the parent company	Specified Quarter		258,232		173,153		49.14	%		295,812		(12.70	%)
	Cumulative		258,232		819,635		—			295,812		(12.70	%)

* 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. Operating results of KB Kookmin Card Co., Ltd. (Consolidated)

(Won in millions, %)		1Q 2014		4Q 2013		% Change Increase (Decrease) (Q to Q)			1Q 2013		% Change Increase (Decrease) (Y to Y)
Operating revenue*	Specified Quarter		722,306		787,202		(8.24	%)		714,376		1.11	%
	Cumulative		722,306		2,990,037		—			714,376		1.11	%
Net operating profit	Specified Quarter		124,899		90,392		38.17	%		124,738		0.13	%
	Cumulative		124,899		503,759		—			124,738		0.13	%
Profit before income tax	Specified Quarter		124,189		89,691		38.46	%		124,760		(0.46	%)
	Cumulative		124,189		502,107		—			124,760		(0.46	%)
Profit for the period	Specified Quarter		94,439		68,734		37.40	%		95,588		(1.20	%)
	Cumulative		94,439		384,411		—			95,588		(1.20	%)
Profit attributable to shareholders of the parent company	Specified Quarter		94,439		68,734		37.40	%		95,588		(1.20	%)
	Cumulative		94,439		384,411		—			95,588		(1.20	%)

* Represents the sum of interest income, fee and commission income, and other operating income.

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: April 25, 2014	By:	/s/ Woong-Won Yoon
	(Signature)
	Name:	Woong-Won Yoon
	Title:	Deputy President & CFO