Although we have experienced tremendous growth and change in recent years, our fundamental beliefs of innovation, customer focus and superior performance have not wavered.



  • LyondellBasell predecessor company scientist Professor Karl Ziegler discovers the first linear polyethylene (PE) chain.
  • LyondellBasell predecessor company scientist Giulio Natta polymerizes the first crystalline polypropylene. 
  • Natta and Ziegler jointly awarded the Nobel Prize in Chemistry for their discoveries in polyolefins technology and catalysts.
  • The PO/TBA process, invented by Atlantic Richfield Company. (ARCO), produces propylene oxide with tertiary butyl alcohol (TBA) as the co-product.
  • Start-up of the first Hostalen high density polyethylene (HDPE) process plant.
  • Spheripol process, currently the most widely used polyolefins process technology, first introduced by predecessor company Montedison
  • Lyondell Chemical Company is formed from selected chemical and refining assets of Atlantic Richfield Company (ARCO).
  • Lyondell is spun off from ARCO, becoming a public company listed on the New York Stock Exchange (Ticker symbol: LYO).
  • Lyondell acquires low-density polyethylene (LDPE) and polypropylene (PP) businesses from Rexene.
  • LYONDELL-CITGO Refining (LCR) is formed as the Houston Refinery becomes a joint venture with CITGO Petroleum Corporation.
  • Equistar Chemicals, LP is formed as a joint venture between Lyondell and Millennium Chemicals Inc.
  • Occidental becomes the third partner in Equistar.
  • Lyondell acquires ARCO Chemical Company.
  • Basell is formed through the merger of Montell, Targor and Elenac; a 50/50 joint venture between BASF and Shell.
  • Basell completes start-up of the world's largest low density polyethylene plant (LDPE) in Aubette, France, with a single line capacity of 320,000 tons per year.
  • Lyondell increases interest in Equistar to 70.5 percent with acquisition of Occidental's share.
  • Lyondell acquires Millennium Chemicals Inc. As a result, Equistar becomes a wholly owned subsidiary of Lyondell.
  • Access Industries, a privately held industrial group with long-term holdings around the world, purchases Basell.
  • Lyondell acquires CITGO’s 41.25 percent ownership interest in LCR. As a result of this transaction, Houston Refining LP(formerly LCR) becomes a wholly owned subsidiary of Lyondell.
  • Basell and Lyondell merge to become LyondellBasell Industries - one of the world's largest polymers, chemicals and fuels companies.
  • LyondellBasell completes acquisition of Solvay Engineered Polymers, Inc.
  • LyondellBasell voluntarily files for protection under Chapter 11 of the U.S. Bankruptcy Code.
  • LyondellBasell emerges from Chapter 11 protection a stronger organization, with a significantly de-levered balance sheet, an improved cost structure, a new leadership team and a clear focus on Operational Excellence and Goal Zero.
  • LyondellBasell is listed on the NYSE as a publicly traded company (Ticker symbol: LYB).
  • Established regular dividends.
  • Announced plans to increase U.S. ethylene capacity to capture the benefits from processing low-cost natural gas liquids. Also announced plans to establish a propylene oxide joint venture in China that will enhance our ability to supply emerging economies.
  • Expanded our independent Supervisory Board by adding four distinguished business leaders.
  • LyondellBasell stock is added to the Standard & Poor's 500
  • Profits reached a new record level and total annual shareholder return was 89 percent.
  • Increased natural gas liquids feedstock flexibility to 85 percent of total U.S. ethylene capacity
  • LyondellBasell debt upgraded to investment grade.

Trademarks Hostalen and Spheripol are trademarks owned or used by LyondellBasell group companies. Trademarks Hostalen and Spheripol are registered in the U.S. Patent and Trademark Office.

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