I've not been able to find good quality/uniform images of these symbols, so I decided to take a crack at them. I can kinda understand the look behind most of them but some just confuse me, and the omission of the 13th bugs me, mainly because that's due to him being maybe/definitely Optimus which is an idea I've always hated (hence leaving him out entirely for the Last Autobot who I kinda feel got shafted in the current line up). The rest should correspond easily enough to my version of the group, most of them kinda look like they could be part of a chest design so for now that'll be my head canon for what they're supposed to be.
[updated to include the thirteenth Prime, thanks RexBlazer1] it occurs to me that while it's obvious to me which insignia is which here, I might as well clarify just to be safe:
Prima, Vector, Megatronous, Nexus, Mortilus, Solus, Onyx, Solomus, Epistemus, Adaptus, Alchemist, Micronus, Autonomous.
Interchange with your own 13 as you will.