Allen Institute for Brain Science

Seattle WA. Non-profit neuroscience research institute founded by Paul Allen (2003, $100M founding gift — his first major science philanthropy). Part of Allen Institute umbrella (alongside AI2 and Allen Institute for Cell Science). Flagship product: Allen Brain Atlas — free, open-access database of gene expression in mouse and human brains, used by 90%+ of neuroscience researchers globally. Allen Cell Types Database. Allen Mouse Brain Connectivity Atlas. $100M+ annual budget from Paul G. Allen estate. Deep UW Medicine partnership. CEO: Christof Koch (leading consciousness researcher, 2011-2023); now Allan Jones. Brain science → AI feedback loop: Brain Atlas data used extensively in training neural network architectures. Precursor intellectual lineage to AI2. Both AIBS and AI2 are Paul Allen legacy institutions — managed under same philanthropic umbrella.