In the context of the input sentence, determine the relationship between 'Covestro' and 'Bayer'.
Options: distributed by, employer, owned by, chairperson

Fri, Sep 4, 2015, 11:05 BST - UK Markets close in 5 hrs 25 mins Bayer says Covestro unit to go public in Q4 AFP – 28 minutes ago View Photo
owned by