Idemitsu Kosan raises profit forecast: what it means for Idemitsu Kosan stock
Published on 10/13/2026 at 05:09 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS- Idemitsu Kosan raised its full-year net profit forecast and announced a share split on October 13, 2026.
- First-quarter fiscal 2027 net income reached JPY 217.50 billion on revenue of JPY 2.27 trillion.
- The last Lang & Schwarz price was EUR 8.48 on October 12, 2026, while results were scheduled for November 11, 2026.
Idemitsu Kosan (ISIN JP3142500002) raised its full-year net profit forecast and announced a share split on October 13, 2026, according to Reuters. The company cited higher oil prices and a weaker yen, which increased inventory valuation, as the reason for the forecast change.
What the forecast means
The forecast revision follows a strong first quarter. Idemitsu Kosan reported JPY 2.27 trillion in revenue and JPY 217.50 billion in net income for the first quarter of fiscal 2027, according to Yahoo Finance.
The first-quarter net income figure was supported by the same inventory valuation mechanism cited in the forecast report. That makes the oil-price and currency backdrop central to the earnings outlook, rather than a purely volume-driven improvement.
Revenue and profit scale
The first-quarter revenue figure was 2.27 trillion yen, while net income reached 217.50 billion yen. The company also reported diluted earnings per share of JPY 179.63 for the period, giving investors a quantified measure of the earnings contribution behind the revised outlook.
For historical context, Idemitsu Kosan reported JPY 8.11 trillion in fiscal 2026 revenue and JPY 171.91 billion in net income, according to GoAI. Fiscal 2026 net income was 65.22 percent above the JPY 104.05 billion reported for fiscal 2025, while revenue was 11.80 percent lower than the JPY 9.19 trillion recorded in fiscal 2025.
Results date and stock context
The next reported results date was November 11, 2026, according to Yahoo Finance. The date gives the market a defined checkpoint for testing whether the forecast increase is being supported by operating performance as well as valuation effects.
Idemitsu Kosan operates in energy, including oil and gas refining and marketing, basic chemicals, functional materials, power and renewable energy, and resources. Its Tokyo Stock Exchange ticker is 5019, and its reported fiscal 2026 market capitalization was JPY 1.8 trillion; the 52-week range was JPY 987.50 to JPY 1,708.50.
Last euro quote
The last available Lang & Schwarz price was EUR 8.48 on October 12, 2026 at 10:57 p.m. CEST. The dated quote gives German-market investors a euro reference before the November results date, while the company's primary listing remains on the Tokyo Stock Exchange.
The further course of trading is shown by the continuously updated real-time quote of Idemitsu Kosan stock.
Idemitsu Kosan stock facts
- Company: Idemitsu Kosan Co., Ltd.
- ISIN: JP3142500002
- Ticker: 5019
- Primary exchange: Tokyo Stock Exchange
- Last price Lang & Schwarz (as of October 12, 2026, 10:57 p.m. CEST): EUR 8.48
- Market capitalization: JPY 1.8 trillion (as of October 12, 2026)
- 52-week range: JPY 987.50-JPY 1,708.50 (as of October 12, 2026)
- Sector / Industry: Energy / Oil and Gas Refining and Marketing
- Next earnings date: November 11, 2026
Market context: Market report Nikkei 225.
