The LHCb Collaboration has reported a 2.5% matter–antimatter asymmetry in Λb baryon decays with 5.2σ significance. This is the first confirmed observation of CP violation in baryons. The Standard Model predicts baryonic CP violation at the∼ 10−11 level, far too small to explain the result or the existence of a matter-dominated universe. In this short paper, we show that the Aperture–Well Unification Theory (AWUT)—a geometric space- time framework—predicts a natural 2–3% baryonic asymmetry due to non-mirror-symmetric trinity-well structure. The explanation requires no tunable parameters and follows directly from AWUT’s basic geometry. Summary CERN has measured a 2.5% CP asymmetry in Λb decays. AWUT predicts a natural 2–3% asymmetry from first-principles geometry. The Standard Model predicts∼ 10−11. This Letter presents the minimal self-contained derivation.