Altair's Revenue Officer Offloads $185,982 in Stock Dias Nelson, Chief Revenue Officer at Altair Engineering, sold 1,671 shares for $185,982 to cover tax-related obligations. Following this sale, Nelson retains 55,411 shares, including 24,490 unvested units. Altair's stock, near its peak, has gained 38% over the past year, fueling significant insider trading activity.2