SES vs QS vs SLDP

For growth investors, SES AI Corporation (SES) is the stronger pick with 929.

4% revenue growth year-over-year, versus 8. 0% for Solid Power, Inc. (SLDP). Analysts rate Solid Power, Inc. (SLDP) a "Buy" — based on 5 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, Solid Power, Inc.

(SLDP) delivered a total return of -70. 8%, compared to -90. 7% for SES AI Corporation (SES). Over 10 years, the gap is even starker: QS returned -25. 6% versus SES's -91. 3%. 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), QuantumScape Corporation (QS) is the lower-risk stock at 2.

61β versus Solid Power, Inc. 's 2. 93β — meaning SLDP is approximately 12% more volatile than QS relative to the S&P 500. On balance sheet safety, Solid Power, Inc. (SLDP) carries a lower debt/equity ratio of 2% versus 6% for QuantumScape Corporation — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), SES AI Corporation (SES) is pulling ahead at 929.

4% versus 8. 0% for Solid Power, Inc. (SLDP). On earnings-per-share growth, the picture is similar: SES AI Corporation grew EPS 29. 0% year-over-year, compared to 5. 6% for Solid Power, Inc.. 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.

QuantumScape Corporation (QS) is the more profitable company, earning 0.

0% net margin versus -429. 5% for Solid Power, Inc. — meaning it keeps 0. 0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: QS leads at 0. 0% versus -463. 7% for SLDP. At the gross margin level — before operating expenses — SES leads at 53. 8%, 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, QuantumScape Corporation (QS) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding.

SES AI Corporation (SES) carries a higher beta of 2. 91 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (QS: -25. 6%, SES: -91. 3%), 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.

These companies operate in different sectors (SES (Consumer Cyclical) and QS (Consumer Cyclical) and SLDP (Industrials)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: SES is a small-cap high-growth stock; QS is a small-cap quality compounder 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.