The Advanced Research Projects Agency for Health (ARPA-H) posts this funding opportunity in support of the Brain Repair of Any Injured Neural Structure (BRAINS) Exploratory Topic program. ARPA-H anticipates multiple awards with Other Transaction award types resulting from this announcement. Interested parties are invited to review the BRAINS Special Notice ARPA-H-SN-26-153 and Innovative Solutions Opening (ISO) ARPA-H-SOL-26-148. Parties interested in submitting a proposal in response to the ARPA-H BRAINS ISO are required (mandatory) to submit a solution summary. No awards will be made, or funding provided as a result of solution summary submissions. The virtual Proposers' Day will be on June 9, 2026 and the recording will be available on the BRAINS program website. The event is intended to foster a greater understanding of the BRAINS program.