Insider Selling: Amprius Technologies (NYSE:AMPX) CTO Sells 3,208 Shares of Stock

Key Points

• Amprius Technologies CTO Constantin Ionel Stefan sold 3,208 shares on May 27 at an average price of $17.19, totaling about $55,146. The sale was disclosed in an SEC filing and was reportedly made to cover tax withholding tied to vested equity awards.
• Stefan also sold 28,812 shares earlier on May 21 at an average price of $14.79, highlighting additional insider selling activity at the company.
• AMPX stock was trading sharply higher at $21.31, near its 52-week high of $22.80, after a recent earnings report that missed EPS expectations but beat revenue estimates. Analysts still rate the stock a Moderate Buy on average, with a target price of $20.25.

Amprius Technologies, Inc. (NYSE:AMPX - Get Free Report) CTO Constantin Ionel Stefan sold 3,208 shares of the company's stock in a transaction on Wednesday, May 27th. The shares were sold at an average price of $17.19, for a total transaction of $55,145.52. Following the completion of the sale, the chief technology officer owned 801,310 shares of the company's stock, valued at approximately $13,774,518.90. This represents a 0.40% decrease in their position. The transaction was disclosed in a filing with the Securities & Exchange Commission, which can be accessed through this link. The sale was made to cover tax withholding obligations related to the vesting of equity awards.

Constantin Ionel Stefan also recently made the following trade(s):

• On Thursday, May 21st, Constantin Ionel Stefan sold 28,812 shares of Amprius Technologies stock. The stock was sold at an average price of $14.79, for a total transaction of $426,129.48.

Amprius Technologies Price Performance

Shares of AMPX traded up $4.15 during midday trading on Thursday, hitting $21.31. The stock had a trading volume of 26,251,931 shares, compared to its average volume of 9,057,368. The company has a 50 day simple moving average of $18.07 and a two-hundred day simple moving average of $13.73. Amprius Technologies, Inc. has a twelve month low of $2.55 and a twelve month high of $22.80. The firm has a market cap of $3.02 billion, a price-to-earnings ratio of -71.03 and a beta of 2.20.

Amprius Technologies (NYSE:AMPX - Get Free Report) last released its quarterly earnings results on Wednesday, May 6th. The company reported ($0.04) earnings per share (EPS) for the quarter, missing the consensus estimate of ($0.02) by ($0.02). Amprius Technologies had a negative net margin of 43.98% and a negative return on equity of 17.48%. The firm had revenue of $28.54 million during the quarter, compared to analyst estimates of $25.72 million. Amprius Technologies has set its FY 2026 guidance at --0.060 EPS. Analysts forecast that Amprius Technologies, Inc. will post -0.07 EPS for the current fiscal year.

Key Stories Impacting Amprius Technologies

Here are the key news stories impacting Amprius Technologies this week:

• Positive Sentiment: Traders bought 46,001 call options on Amprius, a 134% jump above average, suggesting rising speculative demand for upside in AMPX.
• Positive Sentiment: A recent market analysis highlighted Amprius as a June catalyst stock, citing expected updates on capacity, ecosystem development, and backlog, with analysts forecasting roughly 90% revenue growth and continued rapid expansion.
• Neutral Sentiment: Insider selling disclosed this week included director Donald R. Dixon, CEO Thomas M. Stepien, CTO Constantin Ionel Stefan, and director Kang Sun. Several sales were small, and management said some were made to cover tax withholding tied to equity vesting.
• Neutral Sentiment: A research note on the broader silicon anode battery market projected strong long-term growth, which is supportive for Amprius because the company is one of the commercial players in this space.
• Negative Sentiment: Block & Leviton said it is investigating Amprius for potential securities law violations, which could create overhang and legal uncertainty for investors.

Institutional Trading of Amprius Technologies

Several institutional investors have recently added to or reduced their stakes in AMPX. Bank of America Corp DE boosted its stake in Amprius Technologies by 31.1% in the 4th quarter. Bank of America Corp DE now owns 12,890 shares of the company's stock valued at $36,000 after purchasing an additional 3,055 shares during the period. AQR Capital Management LLC boosted its stake in Amprius Technologies by 86.7% in the 1st quarter. AQR Capital Management LLC now owns 77,764 shares of the company's stock valued at $208,000 after purchasing an additional 36,116 shares during the period. Millennium Management LLC raised its position in shares of Amprius Technologies by 94.5% in the first quarter. Millennium Management LLC now owns 1,396,013 shares of the company's stock valued at $3,741,000 after buying an additional 678,442 shares in the last quarter. Goldman Sachs Group Inc. raised its position in shares of Amprius Technologies by 128.6% in the first quarter. Goldman Sachs Group Inc. now owns 244,646 shares of the company's stock valued at $656,000 after buying an additional 137,640 shares in the last quarter. Finally, Rhumbline Advisers raised its position in shares of Amprius Technologies by 61.1% in the first quarter. Rhumbline Advisers now owns 15,690 shares of the company's stock valued at $42,000 after buying an additional 5,951 shares in the last quarter. 5.04% of the stock is currently owned by institutional investors.

Analyst Ratings Changes

A number of analysts recently issued reports on AMPX shares. Weiss Ratings reaffirmed a "sell (e+)" rating on shares of Amprius Technologies in a research report on Monday, April 20th. Roth Mkm restated a "buy" rating on shares of Amprius Technologies in a research note on Friday, May 8th. Cantor Fitzgerald increased their price target on shares of Amprius Technologies from $16.00 to $20.00 and gave the company an "overweight" rating in a report on Friday, March 6th. Needham & Company LLC restated a "buy" rating and set a $20.00 price objective on shares of Amprius Technologies in a research report on Tuesday, March 10th. Finally, B. Riley Financial boosted their price objective on Amprius Technologies from $16.00 to $22.00 and gave the stock a "buy" rating in a report on Monday, March 9th. Eight investment analysts have rated the stock with a Buy rating and one has assigned a Sell rating to the stock. According to data from MarketBeat, Amprius Technologies presently has an average rating of "Moderate Buy" and an average target price of $20.25.

Amprius Technologies Company Profile

Amprius Technologies, Inc NYSE: AMPX is a U.S.-based developer of high-energy-density lithium-ion batteries that leverage silicon anode technology to deliver performance levels beyond conventional graphite-based cells. The company's batteries are designed to offer industry-leading gravimetric energy density, enabling longer run times and reduced weight for portable power applications. Amprius blends advanced materials science and scalable manufacturing processes to commercialize next-generation battery solutions.

At the core of Amprius' product portfolio are cylindrical and prismatic cells that employ a proprietary silicon nanowire anode, which supports high charge/discharge rates while maintaining cycle life.

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