Investments in Equity Accounted Investees (Tables)

12 Months Ended

Dec. 31, 2025

Textblock 1 [Abstract]

Summary of Consolidated Investments in Associates

(a)Details of investments in associates as of December 31, 2024 and 2025 are as follows:

(In millions of won)				December 31, 2024					December 31, 2025
Associates	Location	Closing	Business	Percentage of ownership			Carrying amount		Percentage of ownership				Carrying amount
Paju Electric Glass Co.,    Ltd.	Paju, South Korea	December	Production of glass for display		40	%	W	29,479		40	%	W		31,479
Arctic Sentinel, Inc.	Los Angeles, U.S.A.	March	Development and production of tablet for kids		10	%		—		10	%			—
Cynora GmbH	Bruchsal, Germany	December	Development of organic light emitting materials for displays and lighting devices		10	%		—		10	%			—
Material Science Co.,    Ltd.(*)	Hwaseong, South Korea	December	Development, production, and sales of materials for display		14	%		3,698		9	%			5,027
Total							W	33,177				W		36,506

(*) Due to the investee’s issuance of new shares, the Parent Company’s percentage of ownership decreased from 14% to 9%.

Summary of Financial Information of Significant Associates

(b)Summarized of financial information of the significant associates as of December 31, 2024 and 2025 and for the years ended December 31, 2023, 2024 and 2025 are as follows:

Paju Electric Glass Co., Ltd.

(In millions of won)	December 31, 2024		December 31, 2025
Total assets	W	123,520		122,221
Current assets		110,055		110,544
Non-current assets		13,465		11,677
Total liabilities		48,088		42,107
Current liabilities		47,418		41,469
Non-current liabilities		670		638

8.Investments in Equity Accounted Investees, Continued

(In millions of won)	2023			2024		2025
Revenue	W	184,880			277,093		274,754
Profit (loss) for the year		(2,655	)		10,015		7,499
Other comprehensive income (loss)		(4,894	)		3,301		1,342
Total comprehensive income (loss)		(7,549	)		13,316		8,841

Reconciliation from Financial Information of Significant Associate to its Carrying Value in Consolidated Financial Statements

(c)The reconciliation of the summarized financial information of the significant associates to the carrying amounts of the equity accounted investments as of December 31, 2024 and 2025 are as follows:

(i)As of December 31, 2024

(In millions of won)
Company	Net assets		Ownership interest			Net assets (applying ownership interest)		Intra-group transaction			Carrying amount
Paju Electric Glass Co., Ltd.	W	75,432		40	%		30,173		(694	)		29,479

(ii)As of December 31, 2025

(In millions of won)
Company	Net assets		Ownership interest			Net assets (applying ownership interest)		Intra-group transaction			Carrying amount
Paju Electric Glass Co., Ltd.	W	80,114		40	%		32,046		(567	)		31,479

(d)Carrying amount of other associates, in aggregate, as of December 31, 2024 and 2025 are as follows:

(i)As of December 31, 2024

			Net profit (loss) of associates (applying ownership interest)
(In millions of won)	Book value		Profit (loss) for the year		Other comprehensive income (loss)		Total comprehensive income (loss)
Other associates	W	3,698		1,455		1,912		3,367

(ii)As of December 31, 2025

			Net profit (loss) of associates (applying ownership interest)
(In millions of won)	Book value		Profit (loss) for the year			Other comprehensive income (loss)		Total comprehensive income (loss)
Other associates	W	5,027		(644	)		2,263		1,619

Changes in Investments in Associates and a Joint Venture Accounted for Using Equity Method

(e)Changes in investments in associates accounted for using the equity method for the years ended December 31, 2024 and 2025 are as follows:

(In millions of won)		2024
Company		January 1		Disposals and others			Dividends received			Equity income on investments		Other comprehensive income		Other gain		December 31,
	Paju Electric Glass    Co., Ltd.	W	24,200		—			—			3,957		1,322		—		29,479
Associates	Others		60,129		(60,581	)		(200	)		1,455		1,912		983		3,698
Total		W	84,329		(60,581	)		(200	)		5,412		3,234		983		33,177

(In millions of won)		2025
Company		January 1		Disposals and others			Dividends received			Equity income on investments			Other comprehensive income		Other gain		December 31,
	Paju Electric Glass    Co., Ltd.	W	29,479		—			(1,664	)		3,127			537		—		31,479
Associates	Others		3,698		(1,853	)		—			(644	)		2,263		1,563		5,027
Total		W	33,177		(1,853	)		(1,664	)		2,483			2,800		1,563		36,506