Stocks for Holding Companies

Salam Alaykoum Cheick,

Can you please help understand how to evaluate if a holding company is shariah compliant or no ?
My particular interest is in REIT Holding companies “PERSIMMON PLC” and “TAYLOR WIMPEY PLC” form the UK, plus others I crossed previousley

In my understanding, a holding company is a company that manages a set of sub-companies. So let’s say, one of these “sub-companies” goes high on Debt Ratio, will this be visible on the holding company Ratio ? (same goes for other compliance criteria)

Thanks and barak allah fik