Amprius Technologies (AMPX) vs Power Solutions International (PSIX)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 7, 2026.
Summary
Amprius Technologies (AMPX) has outperformed Power Solutions International (PSIX) over the past year, losing 26.4% versus a loss of 38.8%. Amprius Technologies is the larger company by market cap ($1.36 billion vs $1.19 billion), about 1.1 times the size. On valuation, Power Solutions International trades at a lower forward P/E (15.8x vs 93.3x for Amprius Technologies).
Summary generated from market data by MetaCap's automated system. Methodology
Relative performance
Percent change in share price from the first common trading day shown; excludes dividends.
Head-to-head
| Metric | AMPX | PSIX |
|---|---|---|
| Share price | $9.33 | $51.63 |
| Market cap | $1.36B | $1.19B |
| 1-day change | -1.48% | +7.72% |
| YTD return | +18.25% | -9.64% |
| 1-year return | -26.36% | -38.80% |
| 5-year return | — | +1190.75% |
| P/E ratio (TTM) | — | 17.56 |
| Forward P/E | 93.30 | 15.84 |
| EPS (TTM) | $-0.29 | $2.94 |
| Dividend yield | 0.00% | 0.00% |
| Annual dividend | $0.00 | $0.00 |
| 52-week high | $24.23 | $106.50 |
| 52-week low | $7.71 | $25.28 |
| Distance from 52-week high | -61.49% | -51.52% |
| Average volume | 5.52M | 434.09K |
| Shares outstanding | 146.08M | 23.07M |
| Sector | Miscellaneous | Industrials |
| Industry | Industrial Machinery/Components | Industrial Machinery/Components |
Highlighted cells mark the higher value for growth, returns, margins and yield, and the lower value for P/E ratios. Highlighting is a mechanical comparison, not a recommendation.
Key differences
- AMPX has outperformed PSIX by 12.4 percentage points over the past year.
- The two companies sit in different sectors: Amprius Technologies in Miscellaneous and Power Solutions International in Industrials.
AMPX vs PSIX FAQ
Which is bigger, Amprius Technologies or Power Solutions International?
Amprius Technologies (AMPX) is larger, with a market capitalization of $1.36B compared with $1.19B for Power Solutions International (PSIX).
Which stock has performed better over the past year, AMPX or PSIX?
AMPX returned -26.36% over the past 12 months, compared with -38.80% for PSIX (price return, excluding dividends). Past performance does not predict future results.
Are Amprius Technologies and Power Solutions International in the same industry?
Yes. Both are classified in the Industrial Machinery/Components industry within the Miscellaneous sector.