Edmund Moster (24 August 1873 – 1942) was a Croatian Jewish entrepreneur, industrialist, inventor and co-founder of the "Penkala-Moster Company" (now TOZ) in Zagreb. Moster was born and raised to a Jewish family of Hinko Moster and Terezija Lederer, with nine siblings in Sveti Ivan Žabno near Križevci. His father was much respected tradesman and steam mill owner in Sveti Ivan Žabno. The Moster family's wealth had been earned by diligence and shrewdness. Moster was married to Klara Breitenstein. In 1911, Moster and his brother Mavro collaborated with Slavoljub Eduard Penkala to open the "Penkala-Moster" pen and pencil company in Zagreb. Moster and his brother owned 66,6% of the company, and Penkala 33,3%. Moster would later open another company, in Berlin, Germany, which was headed by his o