Amprius Technologies, Inc. (AMPX-WT) disclosed a cluster of insider selling on May 21, 2026, with multiple senior leaders selling stock at the same price. Sun Kang sold 67,796 shares at $14.79 per share for about $1.00 million. On the same day, Chief Technology Officer Stefan Constantin Ionel sold roughly $426,080 worth of shares, and CEO Thomas M. Stepien sold about $897,690 worth, also at $14.79. Grouped sales like this can matter to retail investors because they show more than one top insider reducing exposure at the same time, and the CEO and CTO are typically among the most informed executives about business execution and technical progress. At the same time, insider sales can happen for many non-business reasons, including taxes, diversification, or pre-arranged selling plans, so the transaction alone doesn’t automatically signal a change in company fundamentals. This May 21 activity also fits a recent pattern for Sun Kang, who has reported substantial sales in recent months, including a much larger transaction valued at about $19.68 million on April 1, 2026. With three insiders selling within the last 30 days, investors may want to watch whether additional sales continue or whether buying appears alongside selling in future filings.