The Defense Advanced Research Projects Agency (DARPA) will host the Multi X Office (MXO) Spark Tank event for prospective proposers and future MXO collaborators on November 2-4, 2026, in Chicago, Illinois. Advance registration is required. Registration will open on August 10, 2026. There will be no on-site registration. This event will be hosted in-person only. The event will include overview presentations by DARPA personnel, including MXO Program Managers, and an opportunity for 1:1 engagement with MXO Program Managers and MXO Leadership via sidebar meetings. After the event, presented materials may be posted tohttps://www.darpa.mil/about/offices/mxo.