UCTT vs. STM

Last updated Jun 3, 2026

UCTT (Ultra Clean Holdings, Inc.) and STM (STMicroelectronics N.V.) are both stocks. Both are in the Technology sector — UCTT in Semiconductor Equipment & Materials, STM in Semiconductors. Over the past 10 years, UCTT returned 31.29%/yr vs 30.87%/yr for STM. At a 0.46 correlation, their price movements are largely independent.

Performance

UCTT vs. STM - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Ultra Clean Holdings, Inc. (UCTT) and STMicroelectronics N.V. (STM). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, UCTT achieves a 256.14% return, which is significantly higher than STM's 207.39% return. Both investments have delivered pretty close results over the past 10 years, with UCTT having a 31.29% annualized return and STM not far behind at 30.87%.

UCTT

• 1D: 6.51%
• 1M: 20.91%
• YTD: 256.14%
• 6M: 250.60%
• 1Y: 361.20%
• 3Y*: 37.90%
• 5Y*: 10.14%
• 10Y*: 31.29%

STM

• 1D: 15.20%
• 1M: 42.62%
• YTD: 207.39%
• 6M: 232.12%
• 1Y: 221.40%
• 3Y*: 22.21%
• 5Y*: 17.95%
• 10Y*: 30.87%

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

UCTT vs. STM - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
UCTT Ultra Clean Holdings, Inc.	256.14%	-29.54%	5.30%	2.99%	-42.21%	84.14%	32.72%	177.10%	-63.32%	138.04%
STM STMicroelectronics N.V.	207.39%	5.28%	-49.67%	41.66%	-26.76%	32.39%	38.91%	96.34%	-35.65%	94.77%

Correlation

The correlation between UCTT and STM is 0.52, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.52
Correlation (3Y) Calculated over the trailing 3-year period	0.56
Correlation (5Y) Calculated over the trailing 5-year period	0.62
Correlation (10Y) Calculated over the trailing 10-year period	0.59
Correlation (All Time) Calculated using the full available price history since Mar 26, 2004	0.46

The correlation between UCTT and STM shifts across timeframes, from 0.46 (all time) to 0.62 (5 years), reflecting how their relationship changes across market environments.

Fundamentals

Market Cap UCTT : $4.09B STM : $73.55B
EPS UCTT : -$4.28 STM : $0.15
PS Ratio UCTT : 1.97 STM : 5.99
PB Ratio UCTT : 6.51 STM : 4.14
Total Revenue (TTM) UCTT : $2.07B STM : $12.40B
Gross Profit (TTM) UCTT : $323.40M STM : $4.20B
EBITDA (TTM) UCTT : -$53.90M STM : $2.32B

Return for Risk

UCTT vs. STM — Risk / Return Rank

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

UCTT

UCTT Risk / Return Rank: 97
UCTT Sharpe Ratio Rank: 99
UCTT Sortino Ratio Rank: 96
UCTT Omega Ratio Rank: 94
UCTT Calmar Ratio Rank: 98
UCTT Martin Ratio Rank: 98

STM

STM Risk / Return Rank: 95
STM Sharpe Ratio Rank: 98
STM Sortino Ratio Rank: 95
STM Omega Ratio Rank: 95
STM Calmar Ratio Rank: 93
STM Martin Ratio Rank: 91

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.

UCTT vs. STM - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Ultra Clean Holdings, Inc. (UCTT) and STMicroelectronics N.V. (STM). 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.

	UCTT	STM	Difference
Sharpe ratio Return per unit of total volatility	5.29	4.26	+1.03
Sortino ratio Return per unit of downside risk	4.31	4.18	+0.13
Omega ratio Gain probability vs. loss probability	1.53	1.59	-0.06
Calmar ratio Return relative to maximum drawdown	12.30	6.11	+6.19
Martin ratio Return relative to average drawdown	34.77	13.97	+20.80
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

UCTT vs. STM - Sharpe Ratio Comparison

The current UCTT Sharpe Ratio is 5.29, which is comparable to the STM Sharpe Ratio of 4.26. The chart below compares the historical Sharpe Ratios of UCTT and STM, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	UCTT	STM	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	5.29	4.26	+1.03
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.17	0.40	-0.23
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.53	0.70	-0.17
Sharpe Ratio (All Time) Calculated using the full available price history	0.19	0.26	-0.06

Drawdowns

UCTT vs. STM - Drawdown Comparison

The maximum UCTT drawdown since its inception was -95.20%, roughly equal to the maximum STM drawdown of -94.40%. Use the drawdown chart below to compare losses from any high point for UCTT and STM.

Drawdown Indicators

	UCTT	STM	Difference
Max Drawdown Largest peak-to-trough decline	-95.20%	-94.40%	-0.80%
Max Drawdown (1Y) Largest decline over 1 year	-29.74%	-36.35%	+6.61%
Max Drawdown (3Y) Largest decline over 3 years	-68.24%	-66.66%	-1.58%
Max Drawdown (5Y) Largest decline over 5 years	-70.43%	-66.66%	-3.77%
Max Drawdown (10Y) Largest decline over 10 years	-79.34%	-66.66%	-12.68%
Current Drawdown Current decline from peak	-1.50%	0.00%	-1.50%
Average Drawdown Average peak-to-trough decline	-46.39%	-55.24%	+8.85%
Ulcer Index Depth and duration of drawdowns from previous peaks	10.52%	15.89%	-5.37%

Volatility

UCTT vs. STM - Volatility Comparison

Ultra Clean Holdings, Inc. (UCTT) has a higher volatility of 23.15% compared to STMicroelectronics N.V. (STM) at 20.98%. This indicates that UCTT's price experiences larger fluctuations and is considered to be riskier than STM based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	UCTT	STM	Difference
Volatility (1M) Calculated over the trailing 1-month period	23.15%	20.98%	+2.17%
Volatility (6M) Calculated over the trailing 6-month period	54.75%	38.05%	+16.70%
Volatility (1Y) Calculated over the trailing 1-year period	68.86%	52.37%	+16.49%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	58.43%	44.64%	+13.79%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	58.77%	44.15%	+14.62%

Dividends

UCTT vs. STM - Dividend Comparison

UCTT has not paid dividends to shareholders, while STM's dividend yield for the trailing twelve months is around 0.45%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
STM STMicroelectronics N.V.	0.45%	1.39%	1.32%	0.48%	0.67%	0.45%	0.50%	0.89%	1.73%	0.98%	2.10%	5.11%
UCTT Ultra Clean Holdings, Inc.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Financials

UCTT vs. STM - Profitability Comparison

The chart below illustrates the profitability comparison between Ultra Clean Holdings, Inc. and STMicroelectronics N.V. over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

UCTT - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Ultra Clean Holdings, Inc. reported a gross profit of 84.40M and revenue of 533.70M. Therefore, the gross margin over that period was 15.8%.

STM - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, STMicroelectronics N.V. reported a gross profit of 1.05B and revenue of 3.10B. Therefore, the gross margin over that period was 33.8%.

UCTT - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Ultra Clean Holdings, Inc. reported an operating income of 11.40M and revenue of 533.70M, resulting in an operating margin of 2.1%.

STM - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, STMicroelectronics N.V. reported an operating income of 96.00M and revenue of 3.10B, resulting in an operating margin of 3.1%.

UCTT - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Ultra Clean Holdings, Inc. reported a net income of -17.90M and revenue of 533.70M, resulting in a net margin of -3.4%.

STM - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, STMicroelectronics N.V. reported a net income of 37.00M and revenue of 3.10B, resulting in a net margin of 1.2%.

Frequently Asked Questions

Can I hold both UCTT and STM in my portfolio?

UCTT and STM have a correlation of 0.52, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, UCTT or STM?

UCTT has higher volatility (23.15%) compared to STM (20.98%). In terms of maximum drawdown, UCTT dropped -95.20% vs STM's -94.40%.

Which has better risk-adjusted returns?

UCTT currently has the higher Sharpe Ratio (5.29 vs 4.26), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.