AMPX stock forecast, quote, news & analysis

Key Takeaways

• Amprius Technologies (AMPX) shares dropped approximately 37% over the past 30 days, falling from $16.17 on June 18 to $10.16 as of July 17, 2026.
• The stock's removal from several Russell indices in late June triggered passive fund selling and dampened institutional demand.
• Analyst downgrades, including a "strong sell" from Zacks Research, and sustained insider selling added downward pressure.
• Despite the steep correction, Amprius reported record Q1 2026 revenue of $28.5 million (up 153% year-over-year) and raised full-year guidance to at least $130 million.
• Longer-term catalysts — including defense contracts, a $21 million light electric vehicle purchase order, and U.S. manufacturing expansion with Nanotech Energy — remain intact.

Amprius Technologies (AMPX) Company Overview and Market Position

Amprius Technologies is a Fremont, California-based developer and manufacturer of high-energy-density lithium-ion batteries built on proprietary silicon anode technology. The company's batteries deliver up to twice the energy density of conventional graphite-based cells — reaching 450–500 Wh/kg — making them particularly valuable for weight-sensitive applications in aerospace, defense, unmanned aerial systems (UAS), light electric vehicles, and emerging markets such as robotics and eVTOL aircraft. Amprius operates a capital-light contract manufacturing model with partners in China, South Korea, and the United States, including a recently announced partnership with Nanotech Energy for domestic production. The company's SiCore platform now represents 97% of product revenue and serves over 550 customers globally. Investors track AMPX for its exposure to the defense drone supercycle, silicon anode battery innovation, and the broader electrification megatrend.

Amprius Technologies (AMPX) Stock Price Performance: Last 30 Days vs. Quarter

AMPX shares declined approximately 37% in the last 30 days, sliding from a close of $16.17 on June 18, 2026, to $10.16 on July 17, 2026. The selloff was marked by several high-volume distribution days, including a 10.9% single-day drop on July 16 and an 11.3% plunge on June 24. Over the broader quarter, the stock has fallen roughly 46% from mid-April levels near $18.67. Notably, AMPX reached a 52-week high of $24.23 on June 2 before entering a persistent downtrend, erasing much of the year's earlier gains. Year-to-date, the stock remains up approximately 29%, reflecting the powerful rally from roughly $7.89 at the end of 2025 that preceded the current correction.

What Drove AMPX Stock Price in the Last 30 Days

Several converging factors drove the sharp 30-day decline. The most significant technical catalyst was the June 27 Russell index reconstitution, which removed AMPX from the Russell Microcap, Russell 3000E, and related growth benchmark indices. Index deletions typically force passive funds and some institutional investors to adjust or exit positions, creating mechanical selling pressure. This was compounded by a Zacks Research downgrade to "strong sell" in early July, which added to negative sentiment despite the broader analyst consensus remaining at "Moderate Buy" with an average price target of approximately $22.50. Insider selling also weighed on investor confidence: Director Donald R. Dixon sold 85,000 shares at $17.17 on June 15, and total insider sales over the trailing 90-day period reached 310,144 shares worth roughly $5 million. Separately, Stephens Investment Management Group reduced its AMPX stake by 38.1% in the first quarter. The stock's elevated beta of 2.25 amplified downside moves in a risk-off tape, while persistent short interest in the mid-teens percentage range contributed to heightened volatility. The 30-day selloff also reflects profit-taking following the stock's meteoric rise — AMPX had surged over 200% from its late-2024 bottom — as growth and battery-sector names faced broad de-rating pressure.

What Drove AMPX Stock Performance Over the Last Quarter

The quarterly story for AMPX is defined by a dramatic reversal. The stock entered the second quarter near $15.52 and rallied sharply to an all-time high of $24.23 by early June, driven by optimism following the Q1 2026 earnings report on May 6–7. That report showcased record revenue of $28.5 million (up 153% year-over-year), a raised full-year revenue outlook to at least $130 million, and reiterated targets for positive adjusted EBITDA. Amprius also highlighted a $21 million multi-quarter purchase order from a Chinese light electric vehicle customer, expanding Defense Innovation Unit contracts totaling $18.1 million, and growing traction with U.S. defense drone programs. However, the post-earnings reaction was volatile: shares plunged 27.4% on May 7 despite the strong headline numbers, as investors digested the EPS miss ($0.04 loss vs. $0.02 estimate) and the temporary gross margin compression tied to the SiMaxx wind-down. After recovering and reaching new highs in early June, the stock was hit by the Russell index deletion, sustained insider selling, analyst downgrades, and broader market caution toward high-growth, pre-profit companies. The net result is a quarterly decline of roughly 46%, underscoring how quickly sentiment can shift in a high-beta name even when fundamental business momentum remains strong.

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AMPX Stock Forecast Drivers: What Investors Should Watch Next

Looking ahead, the Q2 2026 earnings report — expected in early August — stands as the most important near-term catalyst for AMPX. Management guided for a re-acceleration of sequential revenue growth in the June quarter, and the company has a perfect track record of beating revenue estimates over the past three years. Investors will closely monitor SiCore shipment volumes, gross margin trajectory toward the 25% full-year target, and any updates to the $130 million revenue guidance. Beyond earnings, key drivers include the ramp of U.S.-based manufacturing through the Nanotech Energy partnership, progress on NDAA-compliant supply chains for defense customers, and additional purchase orders from the drone and light electric vehicle segments. Macroeconomic risks — including trade policy uncertainty, interest rate sensitivity for growth stocks, and geopolitical tensions affecting Asian manufacturing partners — remain relevant. The stock's elevated short interest could also set the stage for sharp reversals if positive catalysts materialize. Execution on the path to adjusted EBITDA profitability and sustained revenue growth above 60% will ultimately determine whether the recent selloff represents a buying opportunity or the start of a longer repricing.

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