1990

  • The number of permanent members nearly reached 117 thousand.
  • The 7th Stage of Ankara-Çankaya, the 2nd Stage of İstanbul-Sefaköy and the 4th Stage of İzmir-Üçkuyular housing projects were completed and delivered to the members. 
  • The 1st Stage of Ankara-Çayyolu Housing Project was initiated.
  • OYAK became a partner in the First National Bank of Boston which formed the basis of OYAK Bank and in SELYAK which engaged in activities in the field of petroleum products with the brand “ELF”.
  • Shares of Ünye Çimento, Petkim and Aselsan, which were the Group Companies of OYAK, started to be traded in İstanbul Stock Exchange.

1989

  • A service allowing the members, whose retirement was to borrow up to 80% of their reserves was launched in order to ensure that they get prepared for their retirement in advance.
  • The Donation-Based Pensioner Income System was established so as to provide members with additional income after their retirement.
  • The 6th Stage of Ankara-Çankaya and the 1st Stage of İstanbul-Sefaköy housing projects were completed and delivered to the members. 
  • OYAK Turizm ve Ticaret A.Ş. (OYTUR) was established.  

1988

  • Through the decision of the General Assembly of OYAK, the lowest amount for the benefits of death and disability was increased to 20 times the salary of a Colonel which was subject to contributions.
  • The 5th Stage of Ankara-Çankaya and the 3rd Stage of İzmir-Üçkuyular housing projects were completed and delivered to the members. 
  • The 7th Stage of Ankara-Çankaya, the 4th Stage of İzmir-Üçkuyular, the 2nd Stage of İstanbul-Sefaköy and Antalya housing projects were initiated.    

1987

  • Through the decision of the General Assembly of OYAK, the lowest amount for the benefits of death and disability was fixed as 12 times the salary of a Colonel which was subject to contributions.
  • The 4th and 5th Stages of Ankara-Çankaya and the 2nd Stage of İzmir-Üçkuyular housing projects were completed and delivered to the members. 
  • The 1st Stage İstanbul-Sefaköy, the 6th Stage of Ankara-Çankaya and the 3rd Stage of İzmir Üçkuyular housing projects were initiated.  
  • OYAK purchased İzmir Etap Hotel and engaged in activities in the tourism sector.
  • OYAK-Kutlutaş partnership was terminated.
  • Shares of Mardin Çimento started to be traded in İstanbul Stock Exchange.

1986

  • The 2nd and 3rd Stages of Ankara-Çankaya housing project were completed and delivered to the members; the 4th and 5th Stages of the housing project were initiated.  
  • Trading was launched in İstanbul Stock Exchange (İMKB) and the shares of Goodyear, HEKTAŞ, Bolu Çimento and Pınar Et, which were the affiliates of OYAK, started to be traded in İMKB.

1985

  • The number of permanent members reached 90 thousand.
  • The 2nd Stage of İzmir-Üçkuyular housing project was initiated.
  • OYAK Renault started manufacturing the Renault-9 in Turkey, which was selected as the car of the year in Europe. 

1984

  • The 2nd and 3rd Stages of Ankara-Çankaya housing project were initiated.
  • OYAK became a partner in ENTAŞ Entegre Tavukçuluk Sanayi Tic. A.Ş. and ENTAŞ launched the sale of specially-packaged chicken for the first time in Turkey with the brand “Lades”.
  • Partnership in TOE and MAT was terminated. 

1983

  • OYAK became a partner in Pınar Entegre Et ve Yem Sanayii A.Ş. (Pınar Et) and Yatırım Sanayi ve Ticaret A.Ş. (YASAŞ).  

1982

  • The 2nd Stage of İstanbul-Kozyatağı and the 1st Stage of İzmir-Üçkuyular housing projects were completed and delivered to the members. 
  • OYAK became a partner in Eti Pazarlama Sanayi ve Tic. A.Ş. which was an affiliate of Eti Group, one of the two leading groups in the biscuit sector, and in Tam Gıda Sanayi ve Tic. A.Ş. 
  • OYAK İnşaat A.Ş. was established so as to enable members to purchase houses under more favorable conditions and OYAK Menkul Değerler A.Ş. (the current OYAK Yatırım) was established in parallel with the developments in security markets in Turkey.  

1981

  • The Capital Markets Law entered into force and Goodyear, HEKTAŞ and OYTAŞ, which were the Group Companies of OYAK, became subject to this law.