X-Factor Investigations

X-Factor Investigations is a fictional detective agency appearing in American comic books published by Marvel Comics. The organization was created by writer Peter David for the comic book series X-Factor (vol. 3). The agency is made up of mutant heroes operating in District X, solving crimes committed by and against mutants.

The team was founded by Jamie Madrox, and fellow former X-Factor members Strong Guy and Wolfsbane. Long-term members later join, including Siryn, M, Rictor, Shatterstar, and Layla Miller. The team fully disbands with the end of the series, issue #262 (September, 2013).

The agency first appears under the name XXX Investigations in the first issue of the Marvel Comics limited series Madrox #1 (November 2004). In the final issue, Madrox #5 (March 2005), the name is changed to X-Factor Investigations, and later abbreviated XF Investigations.

X-Factor Investigations is reopened on Krakoa during the Krakoan Age of X-Men comics, featured in the 2020 X-Factor title.