What is Trader Joe's sister company?

Could you please explain to me who or what is the sister company of Trader Joe's? I'm curious to know if they operate in a similar industry or if they have any shared ownership or management. Additionally, I'm wondering if their business model or customer base has any similarities to Trader Joe's. It would be helpful if you could provide some details about the company's history, mission, and current market position. Thank you for your time and information.