from 1897 until today

With over 120 years of tradition, the Gustav Heess group of companies today presents itself as an efficient family business with headquarters in Leonberg, 6 subsidiaries and production units in Europe, the USA and Asia. Over 150 employees at various locations ensure that more than 50,000 tons of our specialty oils can be delivered to our customers worldwide every year.

1897 - 2020


Competent and reliable partner for our customers for over 120 years.


Upgrade of our specialty refinery with a state-of-the-art vacuum.


Construction and commissioning of our new oil mill at our Caloy production unit in the USA.


Move to the newly built headquarters in Leonberg with approx. 10,000 m2 of storage area, state-of-the-art filling technology under clean room conditions, 1,000,000 kg tank capacity and a cold storage room for sensitive products.

Construction and commissioning of a modern specialty refinery in our production unit Caloy in the USA.


Investment in own production capacities in the USA, where in the meantime the world's leading producer of nut oils has grown up under the name Caloy.


Expansion of the central laboratory unit and external accreditation according to DIN EN ISO/IEC 17025.


Presentation as a modern, international company in the new headquarters in Stuttgart-Feuerbach.


Founding of the subsidiary Olisud in France.


Consistent further development of the company group by the managing partners Alexander and Boris Zastrow. Certification of the company according to ISO 9002 still at the Stuttgart location in order to meet the stricter requirements for product quality.


Commissioning of an own laboratory at the Stuttgart headquarters.


Active development of foreign markets. Founding of subsidiary in Spain, establishing close partnerships with companies in the Czech Republic, Hungary and Italy.


Continuous development of the company, increase in sales and profits. Move into a new building at Stuttgart's Westbahnhof, as premises in Cannstatt became too small.


Concentration on a market segment that had previously played a secondary role - due to the war, but above all due to the decline of the industries previously supplied in Germany. Supply of industrial consumers in all sectors with vegetable and animal fats and oils and their derivatives. As a result, important customers from the pharmaceutical and cosmetic industries, the chemical, steel and metal industries were acquired.


Foundation of a trading company in Bad Cannstatt by the merchant Gustav Heess. At that time the company supplied the textile and leather industry, which was important in southern Germany, with basic materials such as tannic acids, dye wood extracts, fatty oils and waxes.