Insignia

Ancient Transformer
This ancient symbol was discovered by Shockwave. He claims that although Transformers have been split into two races, they are one species. Generation One

Autobot
This symbol appeared on the forehead of Ancient Robot, who spoke to Rodimus Prime within the Matrix. FFoD

The Fallen
This symbol was only used on the Titanium toyline representation of the Fallen. It was not used in The War Within or any other fiction.

Clench
This symbol was worm by Clench and his team in Kaon's illegal pitfights prior to the Great War. After Megatron replaced Clench as team captain he retained the symbol for a time before developing the Decepticon insignia as his team emblem.

Security Services
This symbol is used by the Autobot Security Services crew operating under Sentinel Prime and was seen on the flags draped over the coffins at the state funeral of operatives Fastback and Bumper.

Senate-related symbol
This symbol was worm the crew of Senator Decimus' ship, as well as by Ratbat during his senatorial days.

Autobot

Decepticon

Emirate Xeon
This symbol appeared on the helmet of the departed politician Emirate Xeon.

Ultracon
Used by Ratbat's group.

Autobot
It seems likely that in the real world, the Autobot symbol was derived from a stylized drawing of Prowl's toy's head. In the Marvel Comics continuity, it was known as the "Autobrand" and was seemingly based on the face of the Last Autobot. In the original animated series, it was a mark of the Quintesson slave brand.

The Autobot symbol as it appeared on Generation One toy packaging.

Decepticon
It seems likely that in the real world, the Decepticon symbol was derived from a stylized drawing of Soundwave's toy's head. It has no given origin in either comic or cartoon, but in the latter, it presumably has the same origin as the Autobot symbol. In the live action movie continuity, it was based on blurred image of the Fallen.

The Decepticon symbol as it appeared on Generation One toy packaging. Note the bevelled detail in the center of the crest at the top - the model sheet of the symbol created for the G1 cartoon based on this version misinterpreted it as a third spike, and it appeared in the show rendered in this manner almost universally.

Cybertron Guard
This symbol represents the Decepticons under Shockwave's command charged with Cybertron's security. It was retroactively named in 2007 by TakaraTomy's World of the Transformers website, but unnamed in its original context.
Divide and Conquer

Wreckers
This symbol was used by the Wreckers in the 3H Wreckers/Universe comics, and debuted in 2001. It is uncertain if prior incarnations of the team used this insignia or if it came into use after the signing of the Pax Cybertronia. Departure

EDC (cartoon)

EDC (Dreamwave)

Machination

Quintesson
This symbol was featured as part of the decal set for the e-Hobby exclusive Overcharge drones.

Z Foundation

Zarak Consortium

Angela

Stardust

Zangetsu

Optimus

Malignus

Cobra

G.I. Joe

Autobot
The G2 Autobot symbol seems clearly based on Optimus Prime. In the Marvel Comics continuity this change may have occured since the Last Autobot had come and gone.

Decepticon
The G2 Decepticon symbol seems to be a stylized, updated G1 Decepticon symbol. Bludgeon's Decepticons adopted this symbol around 1991, apparently unaware it was also being used by the Cybertronian Empire that they would soon encounter.

Cybertronian
This symbol was used by Jhiaxus's Cybertronian Empire, who considered themselves neither Autobot nor Decepticon.

Cybertron Alliance
This was only used in Japanese continuity to bridge Return of Convoy and Generation 2.

Maximal

Predacon

Predacon (Timelines)
Worn by Razorclaw in Dawn of Future's Past.

Mutant

Maximal Peacekeeper
Worn by knight-like Maximal soldiers/peacekeepers in Beast Wars: The Ascending.

Razorclaw

Tantrum

Divebomb

Headstrong

Rampage

Moon

Space Pirate Seacons

Blendtron / Herald of Unicron (semi-official)

Maximal

Vehicon

Dinobot
This insignia replaced the spark crystals of the Beast Wars Neo toys that were introduced to the Beast Machines toyline.

Mini-Con
This symbol hints at the origins of the Mini-Cons, in that the "M" is echoed in Unicron's face, with the border representing the planet-eater's orbital ring.

Unicron
Used in Dreamwave's Armada profile book to denote Unicron-allied Transformers.

Energon
Used to denote Energon. It is a stylized representation of an Autobot Energon star.

Powerlinx - Black
Used by Optimus Prime and his combiner partners.

Powerlinx - Gold
Worn by Mega-sized Transformers who can combine with fellow Mega- and Deluxe-sized Transformers.

Powerlinx - Silver
Worn by Deluxe-sized Transformers who can combine with fellow Deluxe- and Mega-sized Transformers.

Powerlinx - Red
Worn by Ultra-sized Transformers, who can combine with additional vehicle mode parts to form a "brute mode"

Powerlinx - Blue
Used by the Air Team, the Construction Team, and the Destruction Team.

Team Ironhide
An insignia worn by Ironhide and a group of Omni-Cons under his command in an episode of the Energon cartoon.

Unicron
Seen in the background of Unicron's transformation sequence in the Energon cartoon.

Earth
Seen on Cyber Keys that belong to Transformers from Earth.

Velocitron
Seen on Cyber Keys that belong to Transformers from the planet Velocitron.

Jungle Planet
Seen on Cyber Keys that belong to Transformers from the Jungle Planet.

Gigantion
Seen on Cyber Keys that belong to Transformers from the planet Gigantion.

Cybertron Defense Team
Used by Hot Shot, Red Alert, and Scattorshot, after their collective reconstruction.

Autobot
Changes include slanted eyes, slanted top, and the forehead hole having its high edge straightened

Decepticon
Here the eyes are now smaller and more diamond shaped, whereas the original version had triangular eyes.

Sector Seven
A Secret organization on earth that is trying to save humanity from the Autobots and Decepticons.

Mountain Dew Robot
An elite group of infiltrators determined to steal the All Spark for their own purposes.

Stop Sector Seven
Stop Sector 7 was a organization created to stop Sector 7 headed by Agent X .

N.E.S.T.
Depicted on vehicles and uniforms of NEST personnel.

N.E.S.T.
Insignia on some Autobots' ,who join N.E.S.T., toys.

Autobot

Decepticon

Autobot

Autobot Secret Police
Worn by Nightbeat and presumably his subordinates.

Decepticon

Cybertron Elite Guard
This insignia is used by the elite forces under the command of Ultra Magnus.

Sumdac Systems
The corporate logo of Isaac Sumdac's company, as seen in the foyer of Sumdac Tower.

Autotot

Go-bot

Go-bot

First Transformers

Cobra/Decepticon
Used for promotion of the comic, not in the actual story.