Ken Griffin, the billionaire founder and CEO of Citadel, has disclosed a 4.5% stake in DeFi Development Corp. (DFDV), a digital asset treasury company focused on accumulating Solana (SOL). The disclosure, made through a Schedule 13G filing with the U.S. Securities and Exchange Commission, shows Griffin holding more than 1.3 million shares of DFDV, representing roughly 4.5% of its outstanding common stock. Separately, Citadel Advisors LLC and affiliated entities reported ownership of 800,000 DFDV shares, or about 2.7% of the company’s stock. The combined stake positions Citadel among DFDV’s largest institutional ... (full story)