Amprius (AMPX) Plunges 13.65% Post-Earnings as Q3 Results Raise Sustainability Concerns

The share price fell to its lowest level since September 2025 today, with an intraday decline of 5.44%.

Amprius Technologies Inc. (AMPX) has seen its stock fall 15.29% over five days after reporting mixed Q3 2025 results. While revenue surged 173% year-over-year to $21.4 million, driven by a 75% contribution from its aviation segment, the stock dropped 13.65% post-earnings amid concerns over long-term sustainability. Analysts remain optimistic, with Oppenheimer and B.Riley maintaining “Buy” ratings and $17 and $16 price targets, respectively. The company is expanding into defense and drone markets, aiming to diversify revenue streams and improve gross margins above 20% in future quarters.

The lithium-ion battery sector remains competitive, with AMPX’s silicon anode technology facing challenges in scaling profitably against industry leaders. Regulatory shifts in aviation and defense could boost demand for high-performance batteries, but raw material risks and cash burn—$1.4 million adjusted EBITDA in Q3—pose hurdles. Management targets $10 million in additional revenue for cash flow break-even, a goal that will test investor confidence as the stock’s 793.65% annual return contrasts with recent volatility.