AMPX vs SLDP

For growth investors, Amprius Technologies, Inc.

(AMPX) is the stronger pick with 202. 1% revenue growth year-over-year, versus 8. 0% for Solid Power, Inc. (SLDP). Analysts rate Amprius Technologies, Inc. (AMPX) a "Buy" — based on 12 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

Over the past 5 years, Amprius Technologies, Inc.

(AMPX) delivered a total return of +94. 2%, compared to -70. 8% for Solid Power, Inc. (SLDP). Over 10 years, the gap is even starker: AMPX returned +94. 2% versus SLDP's -70. 8%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), Solid Power, Inc.

(SLDP) is the lower-risk stock at 2. 93β versus Amprius Technologies, Inc. 's 3. 05β — meaning AMPX is approximately 4% more volatile than SLDP relative to the S&P 500. On balance sheet safety, Solid Power, Inc. (SLDP) carries a lower debt/equity ratio of 2% versus 38% for Amprius Technologies, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Amprius Technologies, Inc.

(AMPX) is pulling ahead at 202. 1% versus 8. 0% for Solid Power, Inc. (SLDP). On earnings-per-share growth, the picture is similar: Amprius Technologies, Inc. grew EPS 22. 2% year-over-year, compared to 5. 6% for Solid Power, Inc.. Over a 3-year CAGR, AMPX leads at 154. 9% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Amprius Technologies, Inc.

(AMPX) is the more profitable company, earning -60. 3% net margin versus -429. 5% for Solid Power, Inc. — meaning it keeps -60. 3% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: AMPX leads at -63. 9% versus -463. 7% for SLDP. At the gross margin level — before operating expenses — AMPX leads at 11. 3%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

None of the stocks in this comparison currently pay a material dividend.

All are effectively zero-yield and should be held for capital appreciation rather than income.

For long-horizon retirement investors, Amprius Technologies, Inc.

(AMPX) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding. Solid Power, Inc. (SLDP) carries a higher beta of 2. 93 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (AMPX: +94. 2%, SLDP: -70. 8%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Industrials sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: AMPX is a small-cap high-growth stock; SLDP is a small-cap quality compounder stock. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.