| 1956: | Founding of the Österreichischen Mineralölverwaltung Aktiengesellschaft | |
| 1960: | The Schwechat refinery is taken into operation | |
| 1965: | Entry into mineral oil sales with Martha and ÖROP (later ELAN) | |
| 1968: | First natural gas supply contract with the former USSR | |
| 1970: | The Adria-Wien Pipeline is taken into operation | |
| 1974: | Trans-Austria Gas Pipeline is taken into operation | |
| 1980: | West-Austria Gas Pipeline is taken into operation | |
| 1984: | First lead-free gasoline in Austria | |
| 1985: | First international E&P operations in Libya | |
| 1987: |
Acquisition of the Burghausen refinery First step taken towards privatization: 15% of capital stock |
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| 1989: |
Take-over of PCD Polymere GmbH Privatization of further 10% of ÖMV's capital stock |
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| 1990: | Acquisition of CHEMIE LINZ Group; the first ÖMV filling station opens | |
| 1991: | Commencement of the international filling station retail business with the first ÖMV filling stations in Hungary, Czech Republic, Slovakia, Germany and Italy | |
| 1994: | Acquisition of 19.6% of ÖMV's capital stock by IPIC (Abu Dhabi) | |
| 1995: | Renaming from ÖMV to OMV | |
| 1996: | Secondary Offering of 15% of OMV shares | |
| 1997: | The first OMV CNG (compressed natural gas) filling station in Austria opens | |
| 1998: | Sale of PCD to Borealis and acquisition of 25% stake in Borealis | |
| 1999: |
Takeover of the Australian exploration-company CULTUS Petroleum NL First OMV filling stations in Romania and Bulgaria |
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| 2000: | Acquisition of around 10% of the Hungarian oil company MOL | |
| 2001: |
Expansion of the exploration areas in Yemen, Iran and Ireland Natural gas sector spin-off to OMV Erdgas GmbH |
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| 2002: |
Acquisition of 25.1% of the Rompetrol Group First OMV filling station in Serbia-Montenegro |
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| 2003: |
Acquisition of Preussag Energie international E&P-portfolio Acquisition of 45% of Bayernoil-Raffinerieverbund as well as 313 BP-filling stations in Germany, Hungary and Slovakia First OMV filling stations in Bosnia and Herzegovina Acquisition of 139 Avanti filling stations in Austria, Czech Republic, Slovakia and Bulgaria |
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| 2004: |
Restructuring into a management holding Acquisition of a 51% stake in the Romanian oil and gas group, Petrom Capital increase and issue of a convertible bond, hence the free float representing more than 50% of issued share for the first time |
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| 2005: |
Sale of the stake in the Rompetrol Group OMV and IPIC acquire 100% of Borealis OMV sells 50% AMI stake to IPIC |
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| 2006: | Acquisition of a 34% stake in the Turkish oil and gas group, Petrol Ofisi | |
| 2007: | Increase of shareholding in the hungarian oil company MOL to 20.2%; Decision to realize the first OMV power plant projekt in Petrobrazi (Romania) | |
| 2008: | ÖIAG/IPIC consortium increases shareholding in OMV to 50.7% | |
| 2009: | OMV sells its entire stake in MOL to Surgutneftegas | |
| 2010: | Increase of shareholding in the turkish Petrol Ofisi to 95.72%. |