With money accumulated from game-show winnings, Madrox started up a private investigation firm in Mutant Town with Wolfsbane and Strong Guy. Originally calling his company XXX Investigations, the group settled on the name X-Factor Investigations after the team they were formerly members of. Jamie also hired Siryn and M, who were former teammates of his during his time with Paris branch of X-Corporation. After M-Day the majority of the inhabitants of mutant town lost their powers. Rictor was one of the depowered mutants and after considering suicide (with help from one of Jamie's dupes) was convinced to join X-Factor with the others.
The cryptic child Layla Miller ended up spending a lot of time at X-Factor Investigations, often irritating and confusing the occupants. Layla continued to hang out with X-Factor, subtly influencing the members actions with the stuff she knows. Learning more about her life as an orphan, she was invited to live with the team.
The team has since encountered a deranged depowered mutant named Doctor Leery, Damian Tryp and his rival investigation firm Singularity Investigations, the Isolationist, mercenaries Clay and Solo, depowered mutant terrorist group X-Cell (including the Blob and Marrow), and most recently Silver Age X-Men villain Arcade. The team has also notably been rivals with former teammate Quicksilver who has often tried to repower the depowered mutants with ineffective and often disastrous results.
X-Factor has also experienced internal friction after a drunken Multiple Man created dupes that slept with both Monet and Siryn. At first the two girls stopped speaking to each other, but the pair then became frequent partners and best friends. Although often non-combatant rivals with the X-Men, X-Factor Investigations were recruited to participate in the fight for the first new mutant baby which launched Messiah Complex.
Madrox agreed to send two dupes of his to the future (with the help of Forge) to gain information about the future. Layla hitched a ride on the device and became stuck in the future. Unbeknown to Madrox, there was no way in retrieving the dupes and Cyclops and Forge had intended to kill his duplicated selves so Madrox Prime could reabsorb the information. With Layla trapped in the future, alternative methods were needed but Jamie soon fell into a coma.
In the future, after being imprisoned in a mutant concentration camp, Layla and one of Madrox's duplicates met up with a young Lucas Bishop. After learning about the stories he was told about a mutant baby damning the mutant race, Layla stole a bomb from one of the security guards and threw it at the Madrox dupe, allowing Madrox Prime to wake up. Madrox awoke in a panic, relaying the information to the X-Men and with a M tattooed over his face eye. Layla is now stuck in the future, and it is unknown what happened to the other dupe.
During the event, Rictor also posed as a baseline human who hated mutants in order to infiltrate the Purifiers. Under the guise of "Joaquin Murrieta", Rictor pretended to shoot and perhaps fatally injure Wolfsbane in front of members of the group to gain entrance. He then gathered information from their computers to relay to the X-Men about their advanced technology and information regarding the whereabouts of the mutant baby.
The New X-Men, on a mission of revenge, interrupted his undercover duty blowing his cover. Luckily, Rictor was teleported away from the scene in time. Monet, Siryn, and Strong Guy's role in the mission was to participate in combat against the Marauders and the Acolytes on Muir Island. Wolfsbane participated in the X-Force as one of the vicious trackers, a role she would continue with undercover under the orders of Cyclops. X-Factor was falling apart during the Divided We Stand story arc. Madrox has since nearly broken down particularly over the loss of Layla Miller. Siryn has revealed she is pregnant with Jamie's child, but has been unable to properly communicate with him since she found out.
Wolfsbane has decided to stay with X-Force, in part because she has seen a future in which she will kill Jamie Madrox. After a scornful goodbye, she parts ways with Jamie and only leaves a note for Rictor, with whom she's had a romantic relationship in the previous months. Upon reading the letter, an already distraught Rictor decides to leave the team. As he leaves the building, he falls into a trap door that leaves him under the capture of X-Men villain Arcade and the Purifier he tricked into letting him into their group.
The group eventually comes to his rescue but not before Arcade escapes revealing that he has put a force-field around the city that will trap everyone inside as a bomb detonates the entire perimeter. The bomb, implanted within the ex-Purifier upon his last heart beat, prepares to detonate as he drinks his last sip of poison. X-Factor became aware of the Secret Invasion of Earth. In the three part story arc with She-Hulk, X-Factor get their first client in their new location, Detroit, Michigan. The client is looking for his son, who happens to be former X-Man Darwin who happens to be traveling with Longshot.
Upon finding Darwin and Longshot and chasing them across Detroit, She-Hulk and Jazinda turn up resulting in a fight between X-Factor and She-Hulk. It is then revealed that Longshot isn't Longshot at all and is in fact Nogor, representative of the Skrull gods, whose presence on earth gives the Skrulls morale and helps them believe they are blessed in this war. Jazinda had told She-Hulk, which was the reason they were in Detroit and with everything out in the open, She Hulk and X-Factor make up and set about saving the world from the Skrulls.
Nogor is finally captured and is taken off into the distance and Darwin remains with the X-Factor team. While Madrox, Monet, Strong Guy and Longshot are investigating the disappearance of Darwin, Val Cooper turns up with an escort of government agents to reveal to Siryn and Rictor that in fact X-Factor Investigations has been working for the government.
During this time, Syrin goes into labor and Val Cooper is shot on the lawn. Siryn takes Val off to the hospital and herself to have her baby. The gang return from their search and rescue mission for Darwin at the Karma project. Madrox and Siryn become engaged thanks to her asking the question. The baby is finally delivered and as a precaution Madrox follows the baby on its way to the nursery so he isn't stolen by the government.
Upon holding the new baby (now named Sean after his grandfather) it becomes apparent that this isn't any normal homosapien baby, surprise, surprise. A strange glow surrounds Sean and Madrox feels the same sensation as he does when he absorbs his dupes, then baby Sean, like a dupe is absorbed. Siryn is obviously livid with Madrox and upon discovering the conception of her baby was with a dupe of Jamie and not Jamie himself, she promises to break his neck.
X-Factor Investigations recently disbanded. Havok joined Uncanny Avengers, Shatterstar and Rictor are now in Mojoworld, Pip apparently died, Wolfsbane and Darwin quit the team again, Siryn became Morrigan (a supernatural entity). Polaris was recruited for a mysterious project called X-Factor, Madrox & Layla are reunited as a couple, Longshot and Monet will return playing important roles.
Members:
Multiple Man
Layla Miller
Supporting Cast:
None
Former Members:
Wolfsbane
Strong Guy
Rictor
Siryn
M
Longshot
Shatterstar
Darwin
Pip the Troll
Havok
Polaris
