Amprius Tech Stock Drops as Short Seller Alleges MisconductAmprius Technologies IncBATS:AMPXKalaGhaziShares of Amprius Technologies Inc. (NASDAQ: AMPX), a developer of silicon anode battery technology, slipped during trading on Wednesday afternoon following the release of a critical report from a short-selling firm. The report leveled serious accusations against the company, causing investor sentiment to cool and driving the stock price downward. Key Allegations from the Short Report The short seller's report put forward a series of damaging claims regarding Amprius's business practices. Among the most serious accusations were that the company had exaggerated its customer orders, maintained hollow or overstated manufacturing capabilities, and engaged in significant related-party transactions that had not been properly disclosed to the public. As of the time of reporting, Amprius had not immediately responded to Benzinga's request for comment on the allegations. One particularly striking claim made by the short seller—identified as Manatee—involved a Chinese supplier that reportedly accounts for approximately 36% of Amprius's cost of revenue for the 2025 fiscal year. According to the report, this supplier is actually an undisclosed related party with close ties to Kang Sun, the founder of Amprius. If true, this would represent a major omission in the company's disclosures and could raise significant governance concerns. Stock Performance Prior to the Decline Prior to Wednesday afternoon's drop, Amprius had enjoyed a remarkable run on the stock market. Over the past year, shares had risen by roughly 490%, reflecting strong investor enthusiasm for the company's silicon anode battery technology. That surge was supported by a steady stream of positive announcements, including several new customer agreements and recent media appearances by CEO Tom Stepien, who had been actively promoting the company's progress and future prospects. However, the short seller's report appears to have cast a shadow over that momentum, at least temporarily, as investors reassess the validity of the company's claims and the true state of its operations.