Jack Ma just put roughly $76.5 million of his own money where his mouth is. The Alibaba co-founder purchased more than HK$600 million worth of Hong Kong-listed shares in the company over consecutive trading days, making it one of the most significant insider buys the Chinese tech giant has seen in recent memory.

He wasn’t alone. Chairman Joe Tsai scooped up approximately HK$162 million worth of shares over two days, while CEO Eddie Wu added around HK$40 million of his own. Collectively, the executive trio spent more than HK$200 million on top of Ma’s separate, much larger purchase.

The placement that started it all

The insider buying spree didn’t happen in a vacuum. It followed Alibaba’s announcement of a massive share placement designed to bankroll its artificial intelligence ambitions. The company issued 710 million new shares at HK$112.70 each, raising roughly HK$80 billion, or about $10.2 billion. Every dollar of those proceeds is earmarked for AI.

The market’s appetite for the deal was striking. Demand for the placement reached approximately $28 billion, meaning it was oversubscribed by roughly three times.