AsianFin -- Nvidia CEO Jensen Huang has begun selling company stock as part of a pre-arranged plan that could see him offload up to $865 million worth of shares by the end of the year.

According to a Monday filing with the U.S. Securities and Exchange Commission, Huang sold 100,000 shares over June 20 and June 23, generating $14.4 million. The transactions mark the first under a Rule 10b5-1 trading plan adopted in March and disclosed in Nvidia’s most recent quarterly report.

Huang, currently the world’s 12th richest person with a net worth of $126 billion—largely tied to Nvidia stock—has sold more than $1.9 billion worth of shares to date, according to the Bloomberg Billionaires Index.