Amprius Technologies (AMPX) logo

Amprius Technologies (AMPX) stock

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$8.38
-2.44%

Lithium-ion batteries, market cap $1.3BDrones

After-hours $8.45 +0.84%

As of 4:03 PM ET after-hours, delayed 15+ min · Live for Pro members

Why is AMPX down?

Down 63% from its Jun 2, 2026 high.

  • Its $74.5M in cash covers about 6 quarters at the past year's pace of $13.2M a quarter.
  • Arithmetic on filed figures, not a forecast.

Sources: Price history, Oct 30, 2026; Latest balance sheet, Aug 6, 2026; Quarterly reports, Jun 30, 2026

Tell me next time AMPX moves

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1 more reason, free with an account →The other side, how the business stands, the timeline, and its peers, for Pro members.
Quality Score
-3
Poor
In its industry
#10of 18

AMPX's Quality Score fell 4 points on Fri, Oct 30, to -3. Closed more than 1.5% below its 21-day average (4 chart checks stopped).

See AMPX's 14 chart checksSee it live, free until Wednesday morning. No account. No card. Then keep going with a free account.

We do the work for you. Every stock is scored and ranked, every 15 seconds while the market is open. Here it's 15 minutes behind. Pro members see it live.

Key facts on AMPX

Key facts on AMPX
Holding it backA $36M loss narrower than $38M a year earlier
Latest filing8-K, Sep 28 Signed a material agreement
1 more reason behind AMPX's -3, free with an account →5 more reasons behind AMPX's -3, for Pro members.

AMPX in the news

TodayWith its group.

What's next

Wed Nov 11: Q3 2026 Earnings Conference CallDate confirmed.

AMPX catalysts

Coming up

After its last 4 reports it closed +3.2% on average, higher 3 of 4 times.

12 past catalysts since 2022, with sizes and sources, for Pro members.Get in free →

Why AMPX scores -3

Poorfor quality, not price, 1 of 14 chart checks firingWhat the Quality Score means

  • −2Long-term trend below a falling 200-⁠day average, down over one year
  • +3Growth sales up 144% on the year, gross margin up 40.9 pointsSales and margins against a year earlier: up to +3 for fast growth and widening margins, down to -2 when both shrink.
  • Chart checks adds
  • Profit subtractsRead on the last four quarters against the four before, or the last full year where no quarters are filed.
  • Dilution subtractsNew shares over the year: -1 at 10% more, -2 at 25% more.
  • Volatility subtractsA daily range of 5% or more with nothing behind it (no profit or cash flow, sales shrinking, or 10% more shares outstanding with no free cash flow): -1, or -2 from 8%.
  • Cash flow subtracts-1 when free cash flow over the last four quarters is negative.
  • Insider trades subtracts

No effect today: Run-up, Size, Persistence, and News.

What every line is worth, and the reason behind it, on AMPX and every other stock.Get in free →

Price, score, chart checks, and the industry rank are from a snapshot taken at 4:03 PM ET, at least 15 minutes behind. How we rank stocks.

Tested. Our top-⁠scored stocks returned 2.2x the average stock over the next month. How we tested it

Here is what Pro members see.

  • The same page for Pro members, on AMD

    Its Quality Score and rank, the line that drives it, and the live price.

  • The full chart

    A year of candles to start, out to the whole history, with insider trades marked and the Quality Score under the price.

  • Every line of the score

    Price action, the company, and signals, each with its points, on AMPX and every other stock.

  • CEOs buying their own stock

    Every CEO buy, biggest names first. Sort, filter, save the list, and set optional alerts.

  • Congress trades

    A member's trades, newest first, each with its amount. Sort and filter the whole list.

  • 14 chart checks, read for you

    The ones firing on the stock, each in plain words, its rule a tap away.

  • Earnings, week by week

    Who reports each day, and how each stock took its last four reports.

  • FDA dates, counted down

    Each date in the company's words, its cash against the date, and an optional alert before it.

  • The market map

    Every stock a box, colored by its Quality Score.

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    Each theme's stocks ranked by Quality Score, live. Here, AI chips.

  • The top 10, every day

    The ten highest Quality Scores at each close, kept day by day, week by week.

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AMPX has 1 of 14 chart checks firing

Volume1 of 3 shown
Tight range1 of 3 shown
Buying1 of 3 shown
The other 10 checks on AMPX, and all 14 on every stock.Get in free →

AMPX RSI today: 44.3, below its 50-day and 200-day averages

Not scored

Not in the Quality Score: over 20 years of tests, 2006 to 2026, they added no edge.

The deep dive on AMPX

5 more findings on AMPX, each with its source, for Pro membersGet in free →

How AMPX ranks in Electrical Products

AMPX is #10 of 18 by Quality Score among Miscellaneous Electrical Machinery, Equipment & Supplies.

How AMPX ranks in Electrical Products
10Amprius Technologies (AMPX) logoAMPXAmprius-3

Net income over four quarters: AMPX -$36.5M, KTOS $30.9M, UMAC -$6.46M, AIRO -$25.4M.

More in Electrical Products

When does AMPX report earnings, and what happens after?

Reports Tue Nov 10, after the close (in 8 days). Confirmed.

What an earnings report is: every 3 months, a company tells everyone how much it sold and earned. We read the figures, the outlook, and how the stock moved after.

What AMPX reported on Aug 4, 2026

The quarter

The figures are not read from the release yet.

The filing on EDGAR

Where the sales came from

AMPX's results filing gives no sales by line in a table we read.

The outlook

The outlook the company gave, by period
MeasureFigure
2026 full year
Total revenueat least $140 millionraised

Figures as filed (SEC filing, Aug 4)

3 more outlook lines, for Pro members.

The numbers

Market value
$1.3B
today
Sales
$109M
up 144% on the year
Free cash flow
-$58.4M
last 12 months

Its share count grew 20% a year over 3 years.

3 more figures, for Pro members.

No analyst estimates on Breakaway: every figure here is filed.

The whole report on AMPX: every line of its sales, every outlook beside the one it replaced, and the company's words, for Pro members.Get in free →
ReportedGapReaction5
sessions
Aug 4, 2026After close+14.7%+8.4%+11.8%
May 6, 2026After close-13.8%-27.4%-21.1%
Mar 4, 2026After close+7.3%+18.6%+48.1%

AMPX closed higher after 3 of its last 4 reports.

All 4 reports, and AMPX's Quality Score going into each

Everyone reporting earnings next week

AMPX sales and profit by year

Sales and profit by year

Sales grew every year from 2021 to 2025, to $73M. It lost money in each of the five years.

Insiders trading AMPX

AMPX insider trades

4 insiders sold $6.3M across 14 filings in the last 6 months. No open-⁠market buys on record. The newest:

SellKang Sun$642KDirectorat $10.34 on Aug 21, filed Aug 25
All 14 insider filings on AMPX from the last six months, for Pro members.Get in free →

All AMPX insider trades

AMPX's officers and directors

Officers and directors with a Form 4 in the last 12 months.

2 more officers and directors file at AMPX. Each page above names the rest.

See insider trades by person

Which ETFs hold AMPX?

In ETFs: AMPX is under 0.1% of VTI, the most of the 24 funds Breakaway covers, by their holdings as filed for Jun 30, 2026.

About Amprius Technologies

Amprius Technologies Inc is engaged in the production of silicon anodes for high-energy-density lithium-ion batteries. The company develops, manufactures and markets lithium-ion batteries for mobility applications, including the aviation, electric vehicle (EV) and light electric vehicle (LEV) industries. The company's batteries are used for existing and emerging aviation applications, including unmanned aerial systems, such as drones and high-altitude pseudo satellites. Its silicon anodes are a direct drop-in replacement of the graphite anode in traditional lithium-ion batteries, and its manufacturing processes leverage the manufacturing processes for conventional lithium-ion batteries and the related supply chain.

109 employeesFremont, CAamprius.com

What Amprius Technologies says it competes with

“We compete directly and indirectly with current battery manufacturers and with an increasing number of companies that are developing new battery technologies and chemistries to address the growing market for electrified mobility Index to Consolidated Financial Statements solutions.”

From its annual report, SEC filing · Mar 6, 2026

2 more sentences, what it says it does, and its sales by region, for Pro membersGet in free →

AMPX's score card

Amprius Technologies (AMPX): Quality Score -3, Poor, #10 of 18 in Electrical Products, with its price, on Breakaway
The picture a link to this page shows when it is shared.

Pro members see every line of every stock's score.

  • What would turn AMPX's score around: 8 things
  • 2 more filings explained, a plain line each
  • Real-⁠time prices, no delay
BreakawayAug 25Kang Sun sold AMPX$642K at $10.34, filed Aug 25

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See AMPX's 14 chart checks

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Straight Answers

As of Nov 2, 2026: AMPX's Quality Score is -3 (Poor), #10 of 18 in Miscellaneous Electrical Machinery, Equipment & Supplies. Insiders sold $6.3M in the last 6 months (Form 4).

Is AMPX a good stock to buy? What its Quality Score says

AMPX scores -3 today, which Breakaway calls Poor. It is #10 of 18 in Miscellaneous Electrical Machinery, Equipment & Supplies by Quality Score, with 1 of 14 chart checks firing. Down 63% from its Jun 2, 2026 high. Shares: 17.8% more than a year ago (to Jun 30). Breakaway does not say whether to buy any stock: the score does not know your situation, and it is not a recommendation to buy or sell anything. Please do your own research.

What is AMPX's Quality Score?

AMPX scores -3 today, which Breakaway calls Poor (below zero). That is #10 of 18 in Miscellaneous Electrical Machinery, Equipment & Supplies by Quality Score. The score adds up the chart checks, the trend, the company's filed sales, its profits, the news, insider trades, and Congress trades. The section above lists the lines behind AMPX's -3.

Are insiders buying AMPX?

4 insiders sold $6.3M across 14 filings in the last 6 months. No open-⁠market buys on record. The newest is Kang Sun, Director, who sold $642K on Aug 21. Every filing, with the scored weight, for Pro members.

Are the prices delayed?

Only on the public pages, which run at least 15 minutes behind. Pro members, and anyone on a guest pass, see real-time prices: the scanner refreshes every 15 seconds, and your watchlist every few seconds, pre-market and after hours included.

The moves after past earnings reports are past behavior, not a forecast.

The price, the score, the chart checks and readings, and the industry rank on this page are delayed at least 15 minutes.

Our top-scored stocks' record: Oct 2021 to Sep 2026, before costs. Recorded live since Sep 9 2026.

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