List of Thunderbolts members

The codenames listed under Character are those used during the time the character was a member; under the notes section, super-villain codenames are listed if applicable. Many characters changed their codenames upon joining. Characters with multiple codenames during their membership have them listed chronologically and separated by a slash (/). Bolded names are the active team members.

First Appearance is where the character first appeared as a member. It is not necessarily the first appearance of the character, nor the story depicting how the character joined the team.

All information is listed in publication order first, then alphabetical.

During the Civil War, apprehended villains were given a choice to either help the Thunderbolts or go to jail. The project occurred three weeks earlier with the threat of the Grandmaster and his Squadron Sinister. Some of them reformed and joined the Thunderbolts in the end, returned to a life of crime, or joined The Initiative. Here is a list of them: