Nassim Taleb's concept of antifragility goes beyond resilience: antifragile systems do not merely survive shocks — they get stronger from them. This article applies antifragility to organizational design, showing how companies can build antifragile properties through optionality (small bets with asymmetric upside), redundancy (slack resources that enable rapid response), via negativa (improving by removing fragilities rather than adding features), and barbell strategies (combining extreme safety with high-risk experimentation). Case studies include how companies navigated the pandemic and how startups use antifragile principles to compete with incumbents.