Recent Company News

• 07:56 PM ET Nov 11, 2025
  

  Idemitsu Kosan Co. to launch up-to-¥30.00B buyback, to run from 12-Nov through 11-Nov-26 (11-Nov, post-close) (¥1130.0000, +31.5)

• 01:43 AM ET Nov 11, 2025
  

  Idemitsu Kosan Co. reports H1 net income attributable ¥36.08B vs year-ago ¥99.44B (¥1098.5000, 0)

• 10:36 PM ET Oct 28, 2025
  

  Idemitsu Kosan Co. provides results of tender offer for Fuji Oil; 40.9M shares tendered (¥477.0000, 0)

• 11:00 AM ET Oct 27, 2025
  

  StreetAccount Summary - Private company transactions for the week ended 25-Oct

• 11:44 AM ET Sep 18, 2025
  

  Idemitsu Kosan Co. releases 2025 ESG Data Book (¥1027.0000, 0)

• 11:18 AM ET Sep 15, 2025
  

  StreetAccount M&A Summary: Week of 8-Sep

• 03:19 AM ET Sep 11, 2025
  

  Idemitsu Kosan Co. to launch tender offer for Fuji Oil at ¥480/share, to run from 12-Sep to 28-Oct (¥333.0000, 0)

• 09:08 PM ET Sep 09, 2025
  

  Mitsui Chemicals, Idemitsu Kosan and Sumitomo Chemical sign MoU on integration of Sumitomo Chemical's PP and LLDPE businesses into Prime Polymer (¥999.7000, +0.7)

• 07:51 PM ET Sep 09, 2025
  

  Mitsui Chemicals, Idemitsu Kosan and Sumitomo Chemical to merge commodity polyolefin plastic operations - Nikkei (¥3802.0000, 0)

• 11:33 AM ET Aug 29, 2025
  

  Idemitsu Kosan Co. releases 2025 Integrated Report (¥984.0000, 0)