Americium is the most industrially-deployed transuranic element by installation count. Nearly every ionization smoke detector — roughly 3 billion installed globally — contains about 0.29 micrograms of Am-241. Am-241 is separated from legacy plutonium stockpiles where Pu-241 has decayed over decades, making the effective "production" a function of legacy defense inventory drawdown plus solvent extraction capacity, not reactor output. The DOE Isotope Program re-established US domestic production capability in 2012 after a decade-long supply gap; product is now routinely available through NIDC. Annual production volumes, prices, and market shares are not published by DOE — all quantitative claims here should be treated as placeholder until primary sources are identified.