Why Amprius Technologies Stock Surged Today

By Joe Tenebruso – Mar 5, 2026 at 6:16PM ESTKey PointsAmprius' battery business is booming.The company more than tripled its sales in 2025.Shares of Amprius Technologies (AMPX +18.49%) climbed on Thursday after the lithium-ion battery specialist reported impressive growth metrics. By the close of trading, Amprius' stock price was up over 18%. Amprius' high-performance silicon anode batteries. Image source: Amprius Technologies. Electrifying growth Amprius' revenue rocketed 137% higher year over year to $25.2 million in the fourth quarter. "For Amprius, 2025 marked a year of meaningful commercial progress, as we expanded our customer base to over 550, increased revenue by over 3x, and advanced the adoption of our silicon anode batteries across multiple end markets," CEO Tom Stepien said. "Growing demand from existing customers, new program wins, and improved execution across our manufacturing partners drove strong momentum throughout the year." ExpandNYSE: AMPXAmprius TechnologiesToday's Change(18.49%) $2.32Current Price$14.87Key Data PointsMarket Cap$1.6BDay's Range$13.36 - $15.0352wk Range$1.70 - $16.03Volume1.7MAvg Vol7.4MGross Margin7.53% Better still, Amprius' profitability strengthened as it scaled its operations. Its gross margin improved to 24% from negative 21% in the prior-year quarter. That helped the battery cell maker generate positive quarterly adjusted earnings before interest, taxes, depreciation, and amortization (EBITDA) for the first time, totaling $1.8 million. That's compared to an EBITDA loss of $4.8 million in the year-ago period. An upbeat forecast for 2026 Looking ahead, Amprius sees full-year revenue rising by at least 70% to $125 million or more, with adjusted EBITDA of at least $4 million. "In 2026, our team is energized to continue delivering what we believe is a meaningful step function in growth and profitability with a clean balance sheet and a scale-enabling cost structure," chief financial officer Ricardo Rodriguez said.About the AuthorJoe Tenebruso is a contributing Motley Fool stock market analyst with more than 3,000 financial bylines to his name. Joe was an investment analyst for Stock Advisor, Income Investor, Crypto Society, and other top-rated investing services. He also managed Tier 1 Investments, a market-crushing real-money portfolio with 24.58% annualized returns. Joe graduated summa cum laude from Rutgers University with a Bachelor of Science in Finance.tmfguardianX@Tier1InvestorStocks MentionedAmprius TechnologiesNYSE: AMPX$14.87(+18.49%)+$2.32*Average returns of all recommendations since inception. Cost basis and return based on previous market day close.