This is the 15664th most frequent Russian word.
принадлежащих
"Belonging to."
The word 'принадлежащие' is used as a participle modifying 'компании', describing those that are owned by several owners.
Компании, принадлежащие нескольким владельцам, часто имеют сложную структуру.
Companies belonging to several owners often have a complex structure.
Here 'принадлежащие' is used to describe the islands that are under the ownership of a specific country.
Острова, принадлежащие этой стране, находятся в восточной части океана.
The islands belonging to this country are located in the eastern part of the ocean.
In this sentence, 'принадлежащие' refers to documents that are a part of the historical archive.