ParsBoschung company main shareholder is Bahman Diesel Copany that has connections to Iranian government and Bonyand Sepah – Organization that is controlled by IRGC;

Name% of shareholding
Bahman Diesel Co.85.375%
Asre Bahman Commercial Co.2.125%
Iran chassis Production Co.2.125%
Mazda Yadak Co.2.125%
Bouschung Swiss Co.3.625%
Toofan Machine Co.2.5%

ifmat - Parsboschung shareholders and partners

Source » ParsBoschung