About Us

Founded in the second half of the 1970s, Alto Holding Group has evolved over time from an individual enterprise to become recognized companies in their respective fields. With a commitment to quality and integrity in the tasks undertaken, the group has established itself as reputable entities.


Founded in 1984, Köhler Inc. holds the largest market share, 55%, in both mechanical and electronic metering. The accurate measurement of electrical energy, an integral part of our daily lives and industry, is crucial for TEDAS and related institutions, EPDK, and end-user customers. Köhler produces three-phase, single-phase, combi (mechanical and electronic) electricity meters in Turkey with state-of-the-art technology. Our meters, backed by the TS-EN-ISO 9001 quality system certificate, solidify our leading role in the industry.

Despite the decline in electricity consumption due to major earthquakes and subsequent decreases in construction in our country, Köhler has maintained its market share against various challenges. The mandatory use of electronic meters and frequent changes in standards have led many factories producing mechanical electricity meters to close. Despite these challenges, Köhler has preserved its market share. By expanding its product range, it has become capable of meeting the needs of consumers from all walks of life by producing all meters used in Turkey.

As our group believes that balanced and high-quality industrialization is one of the fundamental elements of progress in the modern globalized system, Köhler Inc. has directed the resources it gains from its activities towards new investments. Established in 1996, Alto Tekstil Giyim Boya Apre Sanayi ve Ticaret A.S. began its investment activities by acquiring a 30,000 m2 plot facing the E-5 highway in Tekirdağ Çorlu Vakiflar Yoztepe. It quickly started modern weaving, fabric dyeing, and finishing operations with state-of-the-art machinery. Conscious of the importance of protecting nature as much as industrializing for a country, Altoteks has established a modern infrastructure and treatment plant outside its integrated facility building. It holds the 2000 En ISO 9001:2000 quality certificate.

Çerezler, hizmetlerimizi daha verimli bir şekilde sunmamızı sağlar. Çerez politikasını inceleyebilirsiniz.