This is the 2103rd most frequent Turkish word.
şirketlerinin
"Of their companies."
In this example, 'şirketlerinin' implies 'of the companies' and indicates the source of the pressure.
Küçük işletmeler, büyük şirketlerinin baskısı altında kalıyor.
Small businesses are under pressure from large companies.
In this sentence, 'şirketlerinin' means 'of the companies' and forms the possessive phrase with 'Türk' to show possession.
Türk şirketlerinin başarısı uluslararası arenada tanınıyor.
The success of Turkish companies is recognized on the international stage.
Here, 'şirketlerinin' indicates possession as in 'of their company', referring to the company's offerings.