Here's my output in case it can help:
PS C:\WINDOWS\system32> C:\Users\Desktop\WhatsMyPK.ps1
Subject : CN=Dell Inc. UEFI Platform Key, OU=Signing, OU=1, DC=dell, DC=com
Issuer : CN=Dell Inc. Issuing CA 1, CN=AIA, CN=Public Key Services, CN=Services, CN=Configuration, DC=dell...