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RYUK-IL C&S

191410 · KOSDAQ · Manufacture of Electronic Components

– Previous close pending (official data.go.kr feed not active yet) Live price ↗

Source: Financial Services Commission stock price data (data.go.kr), updated once a day.

Daily price, 1 year

Key statistics

Market cap (KRW bn)–

PER–

PBR–

ROE %13.9

Debt ratio % (liabilities / equity)145

Revenue TTM (KRW bn)36.5

Op. profit TTM (KRW bn)-1.3

Dividend yield %–

Basis: market cap at …; equity = total equity (consolidated if available) at 2026.06.30; net income = trailing 12 months to 2026.06.30 (consolidated). PER is not shown when TTM net income is negative.

Upcoming risk events

Next 90 days for this company, plus macro events tagged with this ticker or its sector. Not a recommendation.

2026-10-30

Apple earnings (estimated date) (FQ4 2026) estimated ↗

iPhone demand matters for Korean camera-module and component makers.

Medium

Other scheduled dates (routine, not risks) (2)

2026-11-02 · Routine schedule: record date
2026-12-16 · Routine schedule: shareholder meeting

See it in the full calendar →

Annual results (KRW bn)

	2021	2022	2023	2024	2025
Revenue	30.9	32.9	29.0	37.5	44.8
Operating profit	-11.3	-2.2	0.9	-0.5	-1.5
Net income	3.0	0.7	-0.2	-0.5	1.6

Quarterly results (KRW bn, 3 months)

	2025Q1	2025Q2	2025Q3	2025Q4	2026Q1	2026Q2
Revenue	19.5	7.3	8.2	9.8	10.8	7.8
Operating profit	0.8	-0.9	-0.9	-0.5	0.5	-0.5
Net income	0.0	-1.9	13.1	-9.6	0.6	-0.8

Largest shareholder

As of the 2025 annual report: 구자옥 and related parties hold 35.24% of common shares.

Recent disclosures

Date	Filing
2026-10-23	CB conversion / price adjustment [기재정정]전환주식의전환청구권행사 (상환전환우선주)	DART original
2026-10-21	Tangible asset / business transfer 주요사항보고서(유형자산양수결정)	DART original
2026-10-20	Governance / misc. (routine) 본점소재지변경	DART original
2026-10-20	Shareholder meeting [기재정정]주주총회소집결의	DART original
2026-10-20	Shareholder meeting [기재정정]주주명부폐쇄기간또는기준일설정	DART original
2026-10-16	Shareholder meeting 주주총회소집결의 (임시주주총회)	DART original
2026-10-16	Shareholder meeting 주주명부폐쇄기간또는기준일설정	DART original
2026-10-16	CB conversion / price adjustment 전환주식의전환청구권행사 (상환전환우선주)	DART original
2026-10-07	Governance / misc. (routine) 기타시장안내	DART original
2026-10-02	Governance / misc. (routine) [기재정정]대표이사변경	DART original
2026-10-01	Governance / misc. (routine) 대표이사변경	DART original
2026-10-01	Shareholder meeting 임시주주총회결과	DART original

Past material filings and price reaction (market-adjusted)

Date	Filing type	On the news (vs. market)	Next day (vs. market)	20 days (vs. market)
2026-09-30	Share buyback decision	+12.2%	-1.8%	–
2026-09-16	Delisting / administrative issue designation	-0.5%	-1.3%	–
2026-09-09	Delisting / administrative issue designation	+0.7%	+9.6%	-7.6%
2026-08-26	Rights offering (paid-in capital increase)	+1.3%	+13.8%	+26.6%
2026-07-23	Tangible asset / business transfer	-0.7%	+6.6%	+8.1%
2026-07-10	Share buyback decision	+7.4%	+21.7%	+7.9%
2026-07-10	Warning: possible administrative-issue designation	+2.8%	+18.5%	+4.9%
2026-07-09	Disposal of shares in another company	-2.8%	+7.4%	+26.3%
2026-03-12	Revenue/profit change >=30% (15% large caps)	-2.1%	-4.3%	-10.9%
2025-07-25	Tangible asset / business transfer	+2.6%	-2.9%	-0.5%

For information only, not investment advice. Data may be delayed or inaccurate. Full disclaimer → Data: OpenDART (FSS), stock prices: official previous-day close from the Financial Services Commission (data.go.kr) and FinanceData/marcap history, index data via FinanceDataReader, FX: ECB reference rates, crypto data from Upbit, Bithumb and Binance public APIs.
Market data not licensed for redistribution.
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