June 5, 1945 - Slovenia's Maribor-based refinery and Lendava Oil Company, located in Lendava, western Slovenia become the Slovenian arm of nationalised Jugopetrol.
Apr 12, 1947 - The Slovenian arm of Jugopetrol renames to Jugopetrol Ljubljana.
Jan 15, 1953 - The company changes its name to Petrol Ljubljana.
1983 - Petrol Ljubljana renames to Petrol.
Nov 30, 1987 - The company sets up trading and procurement company Petrol-Trade Handelsges m.b.H. in Vienna, the capital of Austria.
Dec 11, 1989 - The company establishes trading company Cypet Oils Ltd. in Cyprus.
July 5, 1991 - Petrol and strategic assets management company Istrabenz d.d., based in Koper, western Slovenia, establish Instalacija d.o.o., specialising in storage and handling of petroleum products. Petrol holds a 49% stake in the newly established company.
Oct 4, 1993 - Petrol sets up gas company Petrol Plin d.o.o., following the merger of Petrol's gas operations unit and gas company Apegas d.o.o., in Ljubljana. On Oct 14, 2010 Petrol Plin d.o.o. merges into Petrol d.d.
1996 - Petrol transforms into a joint stock company.
Sept 25, 1996 - Petrol d.d. establishes trading company Petrol Trgovina d.o.o. in Zagreb, the capital of Croatia.
May 5, 1997 - Petrol d.d. is lists on the Ljubljana Stock Exchange.
Jan 5, 1999 - The company sets up trading company Petrol BH Oil Company d.o.o. in Sarajevo, the capital of Bosnia and Herzegovina.
July 7, 1999 - Petrol d.d. acquires fuel retailer Shell Slovenija d.o.o. and changes its name to Destilat d.o.o. In 2004, Destilat d.o.o. renames to Petrol Maloprodaja Slovenija d.o.o.
2000 - Petrol d.d. sets up catering company Petrol Gostinstvo d.o.o., based in Logatec, western Slovenia. In 2005, Petrol d.d. sells to Switzerland-based catering company Marche International Ltd. a total of 75% of Petrol Gostinstvo, which is renamed to Marche Gostinstvo d.o.o.
June 20, 2002 - Petrol d.d. and Slovenian company Nafta Lendava d.o.o., establish Geoenergo d.o.o., engaged in natural gas and crude oil extraction. Petrol d.d. holds a 50% stake in the newly established company.
Aug 14, 2002 - Petrol d.d. sets up Petrol Skladiscenje d.o.o. in Ljubljana, specialising in oil product storage.
Nov 25, 2002 - Petrol d.d. sets up engineering company Petroservis d.o.o. in Ljubljana, which is renamed to Petrol Tehnologija d.o.o. in 2004.
Dec 31, 2002 - Petrol d.d. establishes its wholly owned subsidiary Petrol d.o.o. in Belgrade, the capital of Serbia, specialising in trade of petroleum products.
2002 - Petrol d.d. acquires a 80% stake in Slovenian companies Energetika Ravne d.o.o. and Energetika Store d.o.o. from Ljubljana-based Slovenske Zelezarne d.d. and sets up energy provider Petrol Energetika d.o.o.
July 13, 2004 - Petrol d.d. and Slovenia's tyre production company Sava Tires d.o.o. establish tire retreading company Karkasa d.o.o. in Kranj, Slovenia. Petrol holds a 50% stake in the newly established company.
May 16, 2006 - Petrol d.d. establishes security services company Petrol VNC d.o.o. in Ljubljana.
July 17, 2007 - The company and Kosovo-based OTI C.O. Sh.a. establish trading company Petrol-OTI-Slovenija Sh.p.k., in which Petrol d.d. holds 51%.
July 2007 - Petrol d.d. sets up Albania-based Petrol Slovenia Tirana Sh.a., engaged in wholesale of fuels. Petrol holds a 55% stake in the newly-established company.
Aug 8, 2007 - Petrol d.d. establishes its fully-owned Serbian gas distribution subsidiary Petrol Gas Group DOO.
Aug 22, 2007 - Petrol d.d. and Montenegro-Bonus DOO, based in Cetinje, southern Montenegro, establish Montenegrin fuel trading company Petrol-Bonus d.o.o., in which Petrol d.d. holds a 50% stake.
July 13, 2011 - Slovenia's natural gas distributor RP Plin d.o.o.merges into Petrol d.d..
May 9, 2011 - Slovenia's energy company Ogrevanje Piran d.o.o. merges into Petrol d.d..
2012 - Petrol d.d. raises its stake in Croatian natural gas company Petrol-Jadranplin d.o.o to 100%. Croatia's natural gas company Petrol-Butan d.o.o. merges into Petrol-Jadranplin d.o.o. which renames to Petrol Plin d.o.o. Petrol d.d. acquires a 100% stake in Serbian natural gas seller and distributor Beogas Invest DOO.
Feb 14, 2013 - Petrol d.d. takes over the local electricity producer IG Investicijski Inzeniring d.o.o., which ceases to exist as a separate legal entity
Mar 15, 2013 - Petrol d.d. takes over the local petroleum company Instalacija d.o.o., which no longer exists as a separate legal entity.
Nov 11, 2014 - Petrol d.d. takes over its local subsidiaries Petrol Maloprodaja Slovenija d.o.o., a fuel retailer, and Ekoen Ena d.o.o., a biomass energy producer.
Jan 2, 2015 - Petrol d.d. establishes its subsidiary Petrol Praha CZ s.r.o. in the Czech Republic.
Feb 25, 2015 - Petrol d.d. takes over its environmental solutions subsidiary Eltec Petrol d.o.o.
Feb 26, 2016 - The company takes over its wholly-owned subsidiary Petrol Tehnologija d.o.o., which no longer exists as a separate legal entity.
Oct 3, 2016 - The company takes over its energy distribution subsidiary Energetika Crnomelj d.o.o.
Feb 27, 2018 - Petrol d.d. takes over the local Petrol Energetika d.o.o., which ceases to exist as a separate legal entity
Apr 4, 2018 - Petrol d.d. takes over local Megaenergija d.o.o. which ceases to exist as a separate legal entity.
July 20, 2018 - The company establishes its subsidiary Petrol GEO d.o.o.
Dec 17, 2018 - Petrol Geoterm d.o.o. takes over the local Petrol d.d. and ceases to exist as a separate legal entity.
Dec 21, 2018 - The company acquires a 100% stake in a local companies Ekoen d.o.o., Ekoen GG d.o.o. and Ekoen S d.o.o.
Last updated on Sept 17, 2019.