Is KuCoin under Binance?

Is KuCoin really under Binance? I've heard rumors about this, but I'm not quite sure. Could you clarify this for me? Is there some sort of formal relationship or partnership between the two exchanges? Or is it just a misconception among crypto enthusiasts? I'm quite interested in understanding the structure and affiliations within the cryptocurrency industry, and this is one question that's been lingering in my mind. Could you shed some light on this matter?