It's not a phrase i am familiar with. I'm an ex Finance Director and i have never heard of it. My GUESS is that it might be that one person is operating the company. the company has one owner / operator. but it is odd.

Hi Flaviana! It simply means that the company is run or operated by one person. "Single"= one person "run"= managing or operating something Hope this helps! 😊

Well, your guess was also my guess and it sounded odd to me, as well. However, since I'm not a native speaker, I thought it could be admissible somehow. Thank you for your answer! :)

I agree with Paul. It is not owned and managed by a consortium, but by one person.