My clan and I have completed the raid multiple times with other clan members in a single session and still have yet to unlock the little emblem that sits at the bottom of the clan emblem. The other clan I raid with has had the same problem since Iron Horse launch.
Sorry, forgot there was a bug report section so moved it here.
You might be interested in this thread:
https://forums.ubisoft.com/showthrea...rse-Clan-Honor
You might be interested in this thread:
https://forums.ubisoft.com/showthrea...an-Honor/page4