1935 Plywood manufacturing starts in the Golden Horn to be used in the wings of the first domestic aircraft.
1972 In a small workshop, Hacı Ali Doğan establishes Doğan Mobilya (Furniture).
1978 Panel furniture manufacturing begins at the Düzce factory.
1985 Kelebek opens its first kitchen store.
1987 Doğtaş A.Ş. established as the first step to become institutionalized.
1990 IPO at Borsa İstanbul (Stock Exchange)
1991 First store abroad opens in Dortmund, Germany.
1994 Doğtaş makes its first exports to Albania.
1996 Retail stores open.
1999 Troypark Shopping Mall opens.
2009 Exclusive concept stores open.
2012 Merging with Kelebek, Doğtaş becomes stronger in the furniture market.
2013 Doğtaş and Kelebek companies' new management merge export outlets in 36 countries to become Doğtaş Kelebek Mobilya Sanayi ve Ticaret A.Ş. (Doğtaş Kelebek Furniture Industry and Trade, Inc.)
2017 Active exports to 36 countries, 1,500 employees, 400+ sales points worldwide; Biotrend Çevre ve Enerji Yatırımları A.Ş. (Biotrend Environmental and Energy Investments, Inc.) established.