Officer Kang Sun Files Intent to Sell Over $10M in Amprius Technologies Stock
AMPX has more than doubled off its 52-week low of $1.7 on light trading volume (0.1× avg).
Summary
An officer and director of Amprius Technologies has filed an intent to sell over $10 million in company stock, potentially adding selling pressure to shares.
Key Events · Ownership and Investor Activity · AMPX
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Officer Files Intent to Sell Shares
Kang Sun, an officer and director, filed a Form 144 indicating an intent to sell 1,018,875 shares of common stock.
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Significant Value of Proposed Sale
The proposed sale has an approximate market value of $10,341,581.25, representing a notable amount of shares relative to the company's market capitalization.
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Part of Pre-Planned Trading Plan
The shares are intended to be sold following the exercise of stock options and are part of a 10b5-1 trading plan adopted in August 2025.
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Recent Sales History
This filing follows previous sales by Kang Sun totaling approximately $16.4 million over the past three months, some also under 10b5-1 plans.
Analysis · AMPX · Manufacturing
Kang Sun, an officer and director of Amprius Technologies, has filed a Form 144 indicating an intent to sell approximately $10.3 million worth of common stock. This proposed sale, which follows the exercise of stock options, represents a notable amount of shares entering the market. While the sale is part of a pre-planned 10b5-1 trading plan, the significant volume could create an overhang on the stock. Investors should monitor the actual sales and the company's stock performance.
How filings like this one have moved
In the 30 days to Sep 23, 2026, 29.1% of the 1683 measured filings Wiseek scored 7 moved their stock by 5% or more by the next session's close. The median move was -0.32%. These are measured outcomes after filings of this importance, not a forecast for this one.
Measured one observation per ticker per day, after exclusions. Current figures: Filing Impact Tracker · open dataset
At the time of this filing, AMPX was trading at $10.96 on NYSE in the Manufacturing sector, with a market capitalization of approximately $1.4B. The 52-week trading range was $1.70 to $16.03. This filing was assessed with negative market sentiment and an importance score of 7 out of 10.