The main target of the action is the laboratory supply company Sumilab, based in Culiacan, the capital of the Mexican state of Sinaloa. The Treasury Department, which previously sanctioned the company in 2023, maintains that this business participates in the Sinaloa Cartel's fentanyl production chain. The U.S. identified the Favela Lopez family as being behind the Sumilab operation, specifically four siblings (Victor Andres, Francisco, Jorge Luis, and Gabriela) and some of their partners (Jairo Verdugo and Gilberto Gallardo).