Function Get-Owner {
#requires -version 2.0
 param([string]$file)
 
 try {
  Get-Item $file -ea stop | Out-Null
  write (Get-Acl $file).Owner
  }
  catch {
   Write-Warning "Failed to find $file"
   }
  finally {}
  
}
#example
# dir c:\files -recurse | select fullname,@{name="Owner";Expression={Get-Owner $_.fullname}}