Officer Kang Sun Files Intent to Sell $4.8M in AMPX Shares
AMPX has more than doubled off its 52-week low of $1.7.
Summary
Amprius Technologies officer Kang Sun has filed a Form 144 indicating an intent to sell 506,267 shares of common stock, valued at approximately $4.8 million.
Key Events · Ownership and Investor Activity · AMPX
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Officer Intent to Sell
Kang Sun, an officer and director of Amprius Technologies, filed a Form 144 to sell 506,267 shares of common stock.
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Significant Value
The proposed sale is valued at approximately $4.8 million.
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Shares from Option Exercise
The shares intended for sale were acquired through the exercise of stock options on the same day as the filing.
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Recent Selling History
This filing follows previous sales by Mr. Sun totaling over $11 million in the past three months, including a large sale under a 10b5-1 plan.
Analysis · AMPX · Manufacturing
This Form 144 filing signals a significant intent to sell by Kang Sun, an officer and director of Amprius Technologies. The proposed sale of nearly $4.8 million in shares, following the exercise of stock options, represents a notable transaction. This follows substantial sales by Mr. Sun in the past three months, including a large sale under a 10b5-1 plan. While option exercises often lead to sales for liquidity or tax purposes, the cumulative selling activity from an insider could be interpreted as a lack of conviction or a move to diversify holdings. Investors should monitor actual sales reported on Form 4.
How filings like this one have moved
In the 30 days to Sep 23, 2026, 35.1% of the 1081 measured filings Wiseek scored 8 moved their stock by 5% or more by the next session's close. The median move was -0.41%. 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 $10.15 on NYSE in the Manufacturing sector, with a market capitalization of approximately $1.3B. The 52-week trading range was $1.70 to $16.03. This filing was assessed with negative market sentiment and an importance score of 8 out of 10.