The roots of the company lie in 1962 when construction of nitrogen fertilizer factory was started near Jonava city at the confluence of rivers Neris and Sventoji. A convenient geographical site predetermined the location of the factory. Important highway and railway branches connect the enterprise with the biggest cities of Lithuania and the Baltic Sea port.

After two and a half years of intensive work production of synthetic ammonia was launched on February 9, 1965. This date marks the establishment of the company and also the beginning of large scale chemistry in Lithuania.

• 1968 - Methanol plant launched.
• 1971 - Urea plant launched.
• 1972 - Nitric acid plant launched.
• 1973 - Ammonium nitrate, urea-formaldehyde resins (UFR) and polyvinyl acetate dispersion (PVAD) plants launched.
• 1989 - Becoming a member of International Fertiliser Industry Association (www.fertilizer.org). IFA certificate
• 1994 - Privatisation of VĮ "Azotas" - establishment of AB "Achema".
• 1995 - Production of urea-ammonium nitrate (UAN) solution launched.
• 1995 - Becoming a member of Engineering Ecology Association (IEA).
• 1997 - Becoming a committee member of Fertilizer Europe (fomerly known as European Fertiliser Manufacturers Association (EFMA), www.efma.org).
• 1998 - Quality Management System according to the requirements of ISO 9002 Standard implemented.
• 1999 - Production of aluminium sulphate solution commenced.
• 2000 - Environment Protection Management System according to the requirements of ISO 14001 Standard implemented.
• 2001 - Concern "Achema Group" was established following themerging of SC, JSC subsidiaries.
• 2003 - Launch of calcium ammonium nitrate (CAN) production.
• 2003 - AB "Achema" became a real member of Fertilizer Europe (formerly known as EFMA (www.efma.org)).
• 2003 - Establishment of branch "Gaschema".
• 2004 - Acquisition of 50 % shares of distributing company "Agrobaltic" GmbH.
• 2004 - Launch of the first cogeneration power plant.
• 2004 - Independent fertilizer testing laboratory, validated pursuant to EU directives, commenced its operation.
• 2005 - Implementing of new no-waste technology.
• 2006 - Were started operations in isothermal ammonia storage.
• 2006 - Achema started operations in second ammonia plant.
• 2007 - Implementing of "Workers' protection and healthcare management system" complying with BSI OHSAS standard requirements.
• 2011 - Launch of the second cogeneration power plant.