This document analyzes the ownership structures of Ukrainian oligarchs before and after the 2004 Orange Revolution political turnover. It finds that oligarchs who supported the incumbent regime ("Blue" oligarchs) had more transparent ownership structures, while opponents ("Orange" oligarchs) obscured ownership more through offshore entities. After the revolution, Blue oligarchs increased obfuscation of ownership, while Orange oligarchs' structures became more transparent, suggesting obfuscation is used to protect assets from political threats. The study examines ownership chains of over 300 firms to understand how political connections and obfuscation strategies interact.