Executives and directors at Nvidia have sold more than $1 billion worth of the chipmaker’s shares in the past year, with roughly half of that total disposed of in June alone, the Financial Times reported, citing regulatory filings compiled by data firm VerityData. Chief Executive Officer Jensen Huang resumed selling stock this week for the first time since September under a pre-arranged trading plan that allows him to offload as many as six million shares through year-end. Board member Mark Stevens and several other long-serving insiders have also been active sellers, according to the filings. The transactions coincide with an AI-driven rally that pushed Nvidia’s shares to a record on Wednesday and briefly restored the company’s status as the world’s most valuable, with a market capitalisation of about $3.8 trillion. The stock has climbed roughly 60 percent since its April low amid expectations of sustained demand for the group’s artificial-intelligence processors. Nvidia declined to comment on the report. The up-tick in insider selling comes as investors debate whether the recent valuation surge can be maintained.