AMPX vs. PLUG

Last updated Apr 1, 2026

Compare and contrast key facts about Amprius Technologies Inc. (AMPX) and Plug Power Inc. (PLUG).

Performance

AMPX vs. PLUG - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Amprius Technologies Inc. (AMPX) and Plug Power Inc. (PLUG). The values are adjusted to include any dividend payments, if applicable.

AMPX vs. PLUG - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
AMPX Amprius Technologies Inc.	113.69%	181.79%	-47.07%	-33.29%	-20.70%
PLUG Plug Power Inc.	14.72%	-7.51%	-52.67%	-63.62%	-57.78%

Fundamentals

EPS AMPX : -$0.35 PLUG : -$1.03
PS Ratio AMPX : 29.29 PLUG : 2.42
Total Revenue (TTM) AMPX : $73.01M PLUG : $709.92M
Gross Profit (TTM) AMPX : $8.26M PLUG : $708.24M
EBITDA (TTM) AMPX : -$18.66M PLUG : -$706.05M

Returns By Period

In the year-to-date period, AMPX achieves a 113.69% return, which is significantly higher than PLUG's 14.72% return.

AMPX

• 1D: 14.54%
• 1M: 57.13%
• YTD: 113.69%
• 6M: 60.27%
• 1Y: 529.10%
• 3Y*: 24.63%
• 5Y*: —
• 10Y*: —

PLUG

• 1D: 5.61%
• 1M: 26.26%
• YTD: 14.72%
• 6M: -3.00%
• 1Y: 67.41%
• 3Y*: -42.23%
• 5Y*: -42.27%
• 10Y*: 1.03%

*Multi-year figures are annualized to reflect compound growth (CAGR)

Return for Risk

AMPX vs. PLUG — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

AMPX

AMPX Risk / Return Rank: 97
AMPX Sharpe Ratio Rank: 99
AMPX Sortino Ratio Rank: 96
AMPX Omega Ratio Rank: 92
AMPX Calmar Ratio Rank: 99
AMPX Martin Ratio Rank: 98

PLUG

PLUG Risk / Return Rank: 67
PLUG Sharpe Ratio Rank: 64
PLUG Sortino Ratio Rank: 76
PLUG Omega Ratio Rank: 67
PLUG Calmar Ratio Rank: 68
PLUG Martin Ratio Rank: 61

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

AMPX vs. PLUG - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Amprius Technologies Inc. (AMPX) and Plug Power Inc. (PLUG). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

	AMPX	PLUG	Difference
Sharpe ratio Return per unit of total volatility	5.06	0.59	+4.47
Sortino ratio Return per unit of downside risk	3.79	1.85	+1.94
Omega ratio Gain probability vs. loss probability	1.43	1.19	+0.24
Calmar ratio Return relative to maximum drawdown	10.77	1.21	+9.56
Martin ratio Return relative to average drawdown	27.27	1.97	+25.30
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

AMPX vs. PLUG - Sharpe Ratio Comparison

The current AMPX Sharpe Ratio is 5.06, which is higher than the PLUG Sharpe Ratio of 0.59. The chart below compares the historical Sharpe Ratios of AMPX and PLUG, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	AMPX	PLUG	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	5.06	0.59	+4.47
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	-0.45	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.01	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.12	-0.15	+0.28

Correlation

The correlation between AMPX and PLUG is 0.34, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

AMPX vs. PLUG - Dividend Comparison

Neither AMPX nor PLUG has paid dividends to shareholders.

Tickers have no history of dividend payments

Drawdowns

AMPX vs. PLUG - Drawdown Comparison

The maximum AMPX drawdown since its inception was -94.49%, smaller than the maximum PLUG drawdown of -99.99%. Use the drawdown chart below to compare losses from any high point for AMPX and PLUG.

Drawdown Indicators

	AMPX	PLUG	Difference
Max Drawdown Largest peak-to-trough decline	-94.49%	-99.99%	+5.50%
Max Drawdown (1Y) Largest decline over 1 year	-46.41%	-56.66%	+10.25%
Max Drawdown (5Y) Largest decline over 5 years	—	-98.43%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-99.04%	—
Current Drawdown Current decline from peak	-13.00%	-99.85%	+86.85%
Average Drawdown Average peak-to-trough decline	-57.34%	-96.20%	+38.86%
Ulcer Index Depth and duration of drawdowns from previous peaks	18.33%	34.79%	-16.46%

Volatility

AMPX vs. PLUG - Volatility Comparison

Amprius Technologies Inc. (AMPX) and Plug Power Inc. (PLUG) have volatilities of 30.29% and 29.77%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AMPX	PLUG	Difference
Volatility (1M) Calculated over the trailing 1-month period	30.29%	29.77%	+0.52%
Volatility (6M) Calculated over the trailing 6-month period	76.89%	72.75%	+4.14%
Volatility (1Y) Calculated over the trailing 1-year period	105.63%	115.40%	-9.77%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	129.41%	94.13%	+35.28%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	129.41%	88.56%	+40.85%

Financials