Kang Sun, a director of Amprius Technologies Inc. (NASDAQ: AMPX), sold 62,101 common shares on August 21, 2026, for a total of $642,186 under a non-discretionary sell-to-cover arrangement. The transaction was executed to cover tax withholding obligations linked to the vesting of restricted stock units, according to regulatory filings.
The shares were sold at prices ranging from $10.10 to $10.48 apiece, with AMPX trading around $10.18 at the time. The stock has declined 4.2% over the past week, and InvestingPro analysis has flagged AMPX as overvalued relative to its fair value estimate while noting elevated volatility.
Following the disposition, Sun retains direct ownership of 1,218,397 shares, including 911,688 restricted stock units, and holds an additional 56,406 shares indirectly through the Kang & Cecilia Sun Family Revocable Trust.
Amprius reported Q2 revenue of $34.02 million, exceeding Wall Street expectations of $29.29 million, while posting an adjusted loss per share of negative $0.02, in line with analyst forecasts. The company raised its full-year revenue guidance to at least $140 million, up from a prior estimate of $130 million, and increased its gross margin outlook to at least 28%. Amprius ended the quarter with $74.5 million in cash and no debt.
In operational developments, Amprius extended its industrial lease in Fremont, California, through June 2034, with two five-year renewal options and annual rent adjustments included in the agreement.
