FCC Licensing Requirements for Receive Only Xband groundstations in the U.S

I was curious about whether the FCC requires spectrum licensing to be obtained for receive only
ground stations that operate in the Xband (~10ghz)?

No. The US does not require licenses to receive signals. Decrypting or decoding things with presumptions or privacy or blatantly not intended for you can get into some blatantly illegal or legal gray area territory with the ECPA or other relevant laws.