Does Zara own UNIQLO?

I'm curious to know, does Zara, the popular international fashion retailer, actually own UNIQLO, another well-known clothing brand? I've seen both brands in shopping malls and online, and they seem to offer similar products, but I've never been clear on whether they're part of the same company or separate entities. Can you clarify the ownership structure between Zara and UNIQLO for me? I'm interested in understanding the business relationship, if any, between these two fashion giants.