Take context from the input text and decide on the accurate relationship between 'FedEx' and 'FedEx Express' from the options provided.
Options: distribution format, member of, chief executive officer, subsidiary

And our FedEx Logistics and FedEx Express operating companies continue to work together to secure air charges for customers in the U.S.  Before I close, I’d like to circle back to Brie’s comments about yesterday’s launch of SenseAware ID and the value our sensor-based technology brings to the healthcare industry.
subsidiary