This is another huge myth in the US housing market, that big companies own lots of the housing and are jacking the prices up. It's simply not true. Large corporations own a tiny fraction of the market while the vast majority is owned by individuals and small landlords.
There's a lot of synergy and overlap between small landlords, property management companies, rent-fixing companies, and Wall St. It doesn't matter to the renter that their slum is owned by a tiny LLC that is nevertheless part of the broader constellation of anti-social rent-seeking behavior that is bringing down this republic.
Maybe the new facts evict randomly from the cached index of facts? Or maybe they consolidate with old entries into new entries? Eviction from cache doesn't automatically mean deletion from long term storage.