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Amprius Technologies

AMPX
22
Electrical Equipment & Parts · Industrials
Price
$10.16
+0.06 (+0.59%)
Market Cap
$1.44B
Winston Score
22
Winston is worried
Weak fundamentals across most pillars.

Share count rising — dilution

+23.4% over 4y

The company has issued more shares over this period, which dilutes each existing shareholder’s stake.

Diluted shares outstanding: 101.0M (2021) → 124.6M (2025)

Amprius Technologies makes rechargeable lithium-ion batteries with silicon anodes instead of the traditional graphite ones. This design allows the batteries to store significantly more energy in a lighter package, which appeals to customers in aerospace, defense, and high-performance electric vehicles. The company is known for producing some of the highest energy-density batteries commercially available today.

Amprius earns revenue by selling battery cells and packs directly to customers, with most business currently tied to government and defense contracts alongside early commercial partnerships. The company operates primarily in the United States and is still relatively small, with its competitive edge resting on its proprietary silicon nanowire anode technology, which is difficult for competitors to replicate quickly. However, Amprius is not yet profitable, and its main challenge is scaling up manufacturing capacity fast enough to bring costs down and reach the commercial volumes needed to turn a profit.

Winston Score History

Growth Profile

When traditional metrics don't capture the full picture, these are the signals growth stock investors use instead.

Revenue Growth

+137.4% YoY

YoY Growth Rate

Strong revenue growth

EPS Growth

-84.4% YoY

YoY Growth Rate

Earnings declining

R&D Spend

$9M/ year

Rising (+28% vs prior year)

12.9% of revenue

3.2x the sector average (4%)

Investing heavily in future products and technology

Insider Activity

6.9%ownership

Declining

Insider ownership declining — could be dilution or selling

Cash Runway

~4 years

$90M cash & investments

Quarterly Free Cash Flow

→ Burn rate stable

$90M cash & investments at current burn rate

Strong grower

Amprius Technologies is growing revenue at 137% year-over-year. The Winston Score penalises unprofitable companies, but revenue at this pace tells a different story — this is a company still in "build mode."

The Winston Score above measures business quality today. Growth stocks often score lower because they invest in the future rather than maximising current profits. These metrics show what matters most for evaluating that future.

Score breakdown

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Quality

Gross Margin
23.6%
Thin — 23.6% gross margin
Operating Margin
-11.7%
Losing money on operations — -11.7%
ROCE
-2.7%
Weak — -2.7% return on capital

Negative ROIC means the business is losing money on every dollar invested in it.

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Growth

Sales YoY
+202.1%
Fast-growing sales (202.1% YoY)
EPS YoY
N/A
Data not available
EPS Consistency
0/8 quarters
Earnings rarely grow — volatile business

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Cash Flow

Cash Conversion
N/A
Data not available
FCF Margin
-48.7%
Burning cash (-48.7%)

Free cash flow is negative. They are burning cash, not generating it.

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Stability

Debt / Equity
0.04
Conservative — low debt load (0.04)
Interest Cover
N/A
Data not available

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Valuation

P/E Ratio (TTM)
N/M
Negative earnings — P/E not meaningful
P/E vs Forward
N/A
not available
Data not available

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Dividends

Not applicable for this business.
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