Amprius Technologies (AMPX): Why the Stock is Moving
- Jonathan Poyer
- 13 hours ago
- 3 min read
What happened on the quarter
Amprius reported Q4 2025 revenue of $25.2 million, up 137% year over year, and full-year 2025 revenue of $73.0 million, up more than 3x. Q4 gross margin improved to 24%, and the company posted its first positive quarterly non-GAAP adjusted EBITDA of $1.8 million. Management guided to at least $125 million of revenue in 2026 and at least $4 million of adjusted EBITDA, which is a big step up from 2025.
March 5th Earnings Call
The core message from the March 5 earnings call was straightforward: commercial traction is arriving, manufacturing capacity is broadening, and 2026 is supposed to be the inflection year. Management highlighted a first U.S. contract manufacturing partner, Nanotech Energy, in Northern California, plus three partners in South Korea, with production in Korea already underway since September 2025. In plain English: Amprius is trying to prove it can move from “great battery story” to “real volume business.”
Why AMPX is up so much YTD
As of March 18, 2026, AMPX was trading around $18.90, after touching an intraday high of $19.75 that day. MarketBeat said the stock was up roughly 141% YTD and had just hit a new 52-week high.
The main reasons the stock appears to be working are:
1. The growth outlook changed materially The market likes sharp upward revisions, and Amprius gave investors one: 2026 revenue guidance of at least $125 million versus $73 million in 2025, plus a move to positive adjusted EBITDA. That is the kind of “story stock becomes execution stock” setup investors chase.
2. Manufacturing scale is becoming more believable A battery company can have great tech and still fail if scale is the bottleneck. The call emphasized new manufacturing partners in the U.S. and Korea, which likely helped investors get more comfortable that demand can actually be fulfilled.
3. Analysts moved their numbers up Recent coverage notes target-price increases from firms including Cantor Fitzgerald and B. Riley, while other firms maintained positive ratings. That kind of follow-through often matters for smaller-cap momentum names.
4. The setup fits the market’s current appetite Amprius sits in a sweet spot investors tend to reward when risk appetite is strong: advanced battery tech, aviation/defense angle, high-growth guide, and a visible scale-up narrative. That does not guarantee the move lasts, but it does help explain why the stock has rerated so quickly. This last point is an inference based on the earnings results, the guidance, and the analyst reaction.
Amprius Technologies (AMPX): battery story, now turning into a scaling story
Amprius gave investors what growth-stock investors want to see: real revenue acceleration and a credible 2026 ramp. The company reported Q4 revenue up 137% and full-year revenue up more than 3x, then followed that with 2026 guidance for at least $125 million in revenue and positive adjusted EBITDA.
The more interesting part may be what sat underneath the numbers. On the earnings call, management emphasized expanding manufacturing capacity through a new U.S. contract manufacturing partner and three partners in South Korea. For a company built around high-performance silicon-anode batteries, that matters. Great technology gets attention. Scaled production gets paid.
The stock’s big year-to-date move looks tied to three things: better numbers, a much stronger guide, and growing confidence that Amprius can actually deliver volume. Add in fresh analyst target increases, and you have a pretty clean explanation for why the shares have been acting so well. As of March 18, 2026, the stock was trading near $18.90 and had recently made a new 52-week high
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