| Year | Detail |
| 1994 |
Borealis was formed through the merger of Statoil and Neste, the largest industrial merger in Nordic Europe. |
| 1998 |
OMV's petrochemical sector was incorporated into Borealis. OMV and the International Petroleum Investment Company (IPIC) acquired Neste's 50% business share in Borealis, making it part of their joint venture. This integration was a key component of OMV's petrochemical integration efforts. |
| 2000 |
The company constructed and started its first Borstar Polypropylene plant in Schwechat, Austria. |
| 2001 |
Borouge, a joint venture between Borealis and ADNOV, started a new petrochemical complex in Ruwais, UAE. It includes 600,000 metric tons per year of ethylene cracker and two Borstar polyethylene plants with a combined production capacity of 450,000 t/y. |
| 2007 |
The company launched the Gulf Plastics Pipe Academy (GPPA) to promote the usage of high-quality plastic pipe systems in the Middle East. |
| 2009 |
In August 2009, Borealis to close the HDPE production unit in Beringen, Belgium. |
| 2011 |
The company acquired PEC-Rhin (Ottmarsheim, France), a producer of nitrate fertilizers, ammonia, ammonia water, and nitric acid for industrial use, from GPN. GPN is a 100% subsidiary of Total and a leading European producer of nitrogen-based chemicals. |
| 2014 |
The company launched N-Pilot, an advanced new diagnostic tool to help optimize nitrogen fertilizer applications. |
| 2016 |
Borealis acquired mtm plastics GmbH, a German plastic recycler, and mtm compact GmbH, a post-consumer polyolefin recyclates producer, to underline its commitment to the circular economy and put the company in the industry's pole position regarding plastics recycling. |
| 2017 |
Borealis AG and NOVA Chemicals Corporation signed a preliminary agreement to form a joint venture (JV) with Total Petrochemicals and Refining USA, Inc. that will develop and own a new light feed cracker and a new Borstar polyethylene (PE) facility in Bayport, Texas. |
| 2019 |
Abu Dhabi National Oil Company (ADNOC), Adani Group, BASF, and Borealis AG signed a Memorandum of Understanding to conduct a joint feasibility study to further evaluate a collaboration to establish a chemical complex in Mundra, Gujarat, India. |