[Data: Coinbase CEO has not purchased COIN stock through the 10b5-1 plan] Community analysis of insider trading data reveals that Coinbase CEO Brian Armstrong has never purchased Coinbase stock (COIN) through the 10b5-1 trading plan, with all transactions being sales. To date, his trading records show 0 purchases and 88 sales. The sell-offs span multiple quarters from 2024 to 2025, including approximately $437 million in the fourth quarter of 2024, and approximately $196 million and $268 million in the second and third quarters of 2025, respectively. Data shows that Coinbase's stock price has fallen by approximately 45% over the past six months.