Koç Holding | 976,878 followers on LinkedIn. Koç Holding is Turkey’s leading investment holding company and Koç Group is Turkey's largest industrial and services group in terms of revenues, exports, number of employees, taxes paid and market capitalization on Borsa Istanbul. Being the only Turkish company to be ranked in Fortune Global 500 List and in Forbes World’s Best Employers List, Koç Holding has leading positions with strong competitive advantages in energy, automotive, consumer durables and finance sectors.