OTCMKTS:IDKOY Idemitsu Kosan Co.,Ltd. (IDKOY) Stock Price, News & Analysis $20.34 +0.34 (+1.71%) As of 10/13/2026 03:49 PM Eastern Add Compare Share Share Stock Analysis Stock AnalysisAnalyst ForecastsChartSEC FilingsShort Interest About Idemitsu Kosan Co.,Ltd. Stock (OTCMKTS:IDKOY) View Price History Chart DataSkip Price History Chart 1 Day 5 Days 30 Days 90 Days 1 Year Advanced 1 Day 1 Day 5 Days 30 Days 90 Days 1 Year Advanced Show volume Show extended hours Get IDKOY alerts:Sign Up Key Stats Today's Range$20.00▼$21.4950-Day Range$15.64▼$21.5952-Week Range$13.11▼$22.79Volume795 shsAverage Volume1,455 shsMarket Capitalization$12.44 billionP/E RatioN/ADividend Yield1.33%Price TargetN/AConsensus RatingHold Company Overview Idemitsu Kosan Co., Ltd. is a Japan-based integrated energy and materials company engaged in the production, processing, distribution and sale of petroleum and petrochemical products. Its operations include crude oil refining, fuel marketing, lubricants, oil products for industrial and transportation uses, and chemicals used in manufacturing. The company also develops and supplies functional materials, including products for electronics and other advanced applications. In addition, Idemitsu Kosan has businesses related to power generation, renewable energy and energy-transition technologies, reflecting its efforts to expand beyond conventional fossil fuels. Founded in 1911 by Sazo Idemitsu, the company has grown from a petroleum distributor into a diversified energy group serving customers in Japan and international markets. Idemitsu Kosan expanded its domestic petroleum operations through the integration of Showa Shell Sekiyu K.K. in 2019 and continues to pursue investments in lower-carbon energy and specialized materials.AI Generated. May Contain Errors. Read More Receive IDKOY Stock News and Ratings via Email Sign-up to receive the latest news and ratings for Idemitsu Kosan Co.,Ltd. and its competitors with MarketBeat's FREE daily newsletter. Submit View SMS TermsSMS is currently available in Australia, Belgium, Canada, France, Germany, Ireland, Italy, New Zealand, the Netherlands, Singapore, South Africa, Spain, Switzerland, the United Kingdom, and the United States. By entering your phone number and clicking the sign-up button, you agree to receive periodic text messages from MarketBeat at the phone number you submitted, including texts that may be sent using an automatic telephone dialing system. Message and data rates may apply. Message frequency will vary. Messages will consist of stock alerts, news stories, and partner advertisements/offers. Consent is not a condition of the purchase of any goods or services. Text HELP for help/customer support. Unsubscribe at any time by replying "STOP" to any text message that you receive from MarketBeat or by visiting our mailing preferences page. Read our full terms of service and privacy policy. IDKOY Stock News HeadlinesIdemitsu Renewables Completes Funding of $61M Tax Equity and Debt Financing for Luciana Solar projectJuly 29, 2022 | apnews.comAUPDATE 1-Japan's Idemitsu Kosan to buy out Seibu Oil, shut its refinery -NikkeiJune 14, 2022 | reuters.comA Simple Guide to Options Trading While It's Still FreeA free copy of Options Trading Made Simple is available now but wont stay that way for long. Chris Rowe calls it The 10-Minute Guide to Start Trading Options Today, built to help you open your first options trade with less capital than buying shares outright. | True Market Insiders (Ad)Japan's Idemitsu Kosan to buy out Seibu Oil, close its domestic oil refinery -NikkeiJune 13, 2022 | nasdaq.comIdemitsu Kosan Co Ltd (5019)June 4, 2022 | investing.comIdemitsu Kosan Co.,Ltd. Has Established Idemitsu Americas Holdings Corporation to Accelerate the Development of New Projects to Involve Idemitsu Kosan With Leading Companies in the AmericasAugust 24, 2021 | financialpost.comFSee More Headlines IDKOY Stock Analysis - Frequently Asked Questions How have IDKOY shares performed this year? Idemitsu Kosan Co.,Ltd.'s stock was trading at $15.25 at the beginning of 2026. Since then, IDKOY stock has increased by 33.4% and is now trading at $20.3412. When did Idemitsu Kosan Co.,Ltd.'s stock split? Shares of Idemitsu Kosan Co.,Ltd. split on the morning of Friday, January 5th 2024.The 5-1 split was announced on Friday, January 5th 2024. The newly issued shares were issued to shareholders after the closing bell on Friday, January 5th 2024. An investor that had 100 shares of stock prior to the split would have 500 shares after the split. How do I buy shares of Idemitsu Kosan Co.,Ltd.? Shares of IDKOY stock can be purchased through any online brokerage account. Popular online brokerages with access to the U.S. stock market include Charles Schwab, E*TRADE, Fidelity, and Vanguard Brokerage Services. Company Calendar Today10/14/2026Fiscal Year End3/31/2027Get Stock AlertsIndustry, Sector and Symbol Stock ExchangeOTCMKTS SectorEnergy Industry Oil, Gas & Consumable Fuels Sub-IndustryOil & Gas Refining & Marketing Current SymbolOTCMKTS:IDKOY CIK1380365 Webwww.idemitsu.co.jp Phone(133) 213-3150FaxN/AEmployees13,991Year FoundedN/AProfitability EPS (Trailing Twelve Months)N/A Trailing P/E RatioN/A Forward P/E RatioN/A P/E GrowthN/ANet IncomeN/A Net MarginsN/A Pretax MarginN/A Return on EquityN/A Return on AssetsN/A Debt Debt-to-Equity RatioN/A Current RatioN/A Quick RatioN/A Sales & Book Value Annual SalesN/A Price / SalesN/A Cash FlowN/A Price / Cash FlowN/A Book ValueN/A Price / BookN/AMiscellaneous Outstanding Shares611,610,000Free FloatN/AMarket Cap$12.44 billion OptionableNot Optionable BetaN/A The Infrastructure's Backbone: 10 Stocks Powering the AI BuildoutThe AI boom extends far beyond the biggest tech names. Discover 10 companies supplying the memory, storage, networking, semiconductor manufacturing, and power infrastructure that make AI possible. Learn where the next wave of AI investment opportunities may emerge—and the key risks investors should watch as the global AI buildout accelerates.Get This Free Report This page (OTCMKTS:IDKOY) was last updated on 10/13/2026 by MarketBeat.com Staff. From Our PartnersWall Street legend reveals his top AI stock before Oct. 20Marc Chaikin, the 60-year Wall Street veteran behind the Power Gauge rating system, has flagged a new AI stock...Chaikin Analytics | SponsoredTrump's about to unleash his Midterm WeaponTrump is turning the midterms into a referendum on American energy, pushing for more oil, more gas, and lower ...Monument Traders Alliance | SponsoredA Simple Guide to Options Trading While It's Still FreeA free copy of Options Trading Made Simple is available now but wont stay that way for long. 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