Ali Haydar Kurtdarcan

Bilkent Holding AS engages in the provision of investment management services. It focuses on the contracting and project, industry and trade, corporate service, individual service, real estate management, and other subsidiaries. The company was founded by Ihsan Dogramaci in 1968 and is headquartered in Bilkent, Turkey.

Tepe Insaat Sanayi AS provides construction and engineering services. Its services includes engineering, procurement, construction, and design build. The firm involves in building housing projects, hospital and health complexes, airports and terminals, and infrastructure projects. The company was founded in 1969 and is headquartered in Ankara, Turkey.

Ido Istanbul Deniz Otobusleri Sanayi Ve Ticaret AS provides marine transportation services. The firm operates fast ferries, sea buses, passenger boats, vehicle ferries, and cruisers. It also offers reservation services and travel insurance products through online. The company was founded in 1987 and is headquartered in Istanbul, Turkey.

TAV Tepe Akfen Investment Construction & Opertation JSC operates as a construction company which engages in the construction & operation of airports. Its services include design, construction, project financing, procurement and project management. The company was founded in 1997 and is headquartered in Istanbul, Turkey.

TAV Yatirim Holding AS builds and operates airports.

Tepe Güvenlik AS is a security company based in Ankara, Turkey. Part of Securitas AB, Tepe Güvenlik AS provides corporate security services, including Securitas Alarm systems for emergency situations such as theft and gas leaks. The Turkish company's services include home and business alarm systems, communication, call center, and regional office information. Founded in 1992, the private company was acquired by Securitas AB on August 24, 2021 for $1.18 million.