Insider Trading May 26, 2026 07:10 PM

Amprius Technologies CEO Sells Shares Amid Mixed Financial and Operational Signals

Insider transactions, recent quarterly earnings reports, and strategic partnerships create a complex picture for NASDAQ-listed stock.

By Hana Yamamoto AMPX

Thomas M. Stepien, Chief Executive Officer of Amprius Technologies, Inc., executed a significant sale of company stock totaling approximately $897,685. This transaction occurred as part of mandated sell-to-cover arrangements related to vesting restricted stock units. The recent corporate activity includes reporting Q1 2026 earnings, announcing a partnership with Matternet for battery supply, and facing scrutiny from short sellers regarding company disclosures.

Amprius Technologies CEO Sells Shares Amid Mixed Financial and Operational Signals
AMPX

Key Points

  • CEO Stock Sale Details
  • Financial Performance Mix
  • Strategic Partnerships & Short Seller Concerns

Thomas M. Stepien, the Chief Executive Officer of Amprius Technologies, Inc., executed the sale of 60,702 shares of the company's common stock on May 21, 2026. The total value realized from this transaction amounted to approximately $897,685.

Analysis of the sale reveals that the average selling price for these shares was $14.7884 per share. Furthermore, individual transactions during the period saw prices fluctuating between a low of $14.54 and a high of $15.08. The nature of this divestiture is tied to non-discretionary 'sell-to-cover' arrangements. These mandates are required by the issuer specifically to fund tax withholding obligations that arise from the vesting of restricted stock units.

It is notable that following these specific sales, Mr. Stepien maintained a direct holding of 699,298 shares of Amprius Technologies common stock. This substantial total includes an additional 625,000 restricted stock units (RSUs). These RSUs represent contingent rights to receive one share of common stock each, which are subject to defined vesting schedules and specific conditions.


The company's recent operational news presents a mixed financial picture. In its Q1 2026 earnings report, Amprius Technologies disclosed a net loss totaling $5 million, equivalent to -$0.04 per share. This figure represented a decline compared to the forecasted net loss of -$0.0278 per share.

Despite the reported net loss, the company managed to exceed its revenue expectations for the quarter. Amprius Technologies announced total revenues of $28.5 million, which surpassed the forecast estimate of $25.32 million.

On the strategic front, Amprius Technologies formalized a collaboration with Matternet. This partnership is designed to supply silicon anode lithium-ion batteries specifically for Matternet's M2 delivery drones. The goal of this alliance is to develop comprehensive battery solutions intended for Matternet’s next generation platform. Production readiness for these advanced solutions is slated to align with the company's fleet expansion plans, beginning in early 2027.


The market attention surrounding Amprius Technologies has been intensified by external reports and analyses. One such development involved short seller Manatee Research. This firm released a report that alleged irregularities regarding exaggerated orders and disclosure failures within Amprius Technologies. The report was based on an extensive, month-long investigation and consequently raised specific concerns about the company’s overall operations and required disclosures.

Risks

  • Regulatory/Disclosure Scrutiny
  • Net Loss vs. Revenue Growth
  • Dependence on Future Product Readiness

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