STX vs. LDOS

Last updated Jun 9, 2026

STX (Seagate Technology plc) and LDOS (Leidos Holdings, Inc.) are both stocks. Both are in the Technology sector — STX in Computer Hardware, LDOS in Information Technology Services. Over the past 10 years, STX returned 49.93%/yr vs 15.01%/yr for LDOS. At a 0.30 correlation, their price movements are largely independent.

Performance

STX vs. LDOS - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Seagate Technology plc (STX) and Leidos Holdings, Inc. (LDOS). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, STX achieves a 218.93% return, which is significantly higher than LDOS's -31.76% return. Over the past 10 years, STX has outperformed LDOS with an annualized return of 49.93%, while LDOS has yielded a comparatively lower 15.01% annualized return.

STX

• 1D: 3.46%
• 1M: 12.03%
• YTD: 218.93%
• 6M: 208.54%
• 1Y: 599.43%
• 3Y*: 149.84%
• 5Y*: 59.24%
• 10Y*: 49.93%

LDOS

• 1D: -1.31%
• 1M: -5.62%
• YTD: -31.76%
• 6M: -33.53%
• 1Y: -16.31%
• 3Y*: 15.32%
• 5Y*: 4.53%
• 10Y*: 15.01%

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

STX vs. LDOS - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
STX Seagate Technology plc	218.93%	225.26%	4.06%	69.12%	-51.42%	87.50%	10.14%	62.14%	-2.90%	16.67%
LDOS Leidos Holdings, Inc.	-31.76%	26.50%	34.52%	4.50%	20.04%	-14.20%	8.95%	88.82%	-16.72%	29.14%

Correlation

The correlation between STX and LDOS is 0.02, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.02
Correlation (3Y) Calculated over the trailing 3-year period	0.13
Correlation (5Y) Calculated over the trailing 5-year period	0.17
Correlation (10Y) Calculated over the trailing 10-year period	0.27
Correlation (All Time) Calculated using the full available price history since Oct 13, 2006	0.30

Over the past year, the correlation between STX and LDOS has dropped to 0.02 - well below their long-term average of 0.30, suggesting their price drivers have been diverging.

Fundamentals

Market Cap STX : $199.90B LDOS : $15.72B
EPS STX : $10.58 LDOS : $10.92
PE Ratio STX : 82.87 LDOS : 11.25
PEG Ratio STX : 0.99 LDOS : 0.09
PS Ratio STX : 17.90 LDOS : 0.92
PB Ratio STX : 182.56 LDOS : 3.14
Total Revenue (TTM) STX : $11.01B LDOS : $17.33B
Gross Profit (TTM) STX : $4.57B LDOS : $3.04B
EBITDA (TTM) STX : $2.59B LDOS : $2.34B

Return for Risk

STX vs. LDOS — Risk / Return Rank

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

STX

STX Risk / Return Rank: 99
STX Sharpe Ratio Rank: 100
STX Sortino Ratio Rank: 99
STX Omega Ratio Rank: 98
STX Calmar Ratio Rank: 100
STX Martin Ratio Rank: 100

LDOS

LDOS Risk / Return Rank: 20
LDOS Sharpe Ratio Rank: 18
LDOS Sortino Ratio Rank: 19
LDOS Omega Ratio Rank: 18
LDOS Calmar Ratio Rank: 28
LDOS Martin Ratio Rank: 18

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.

STX vs. LDOS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Seagate Technology plc (STX) and Leidos Holdings, Inc. (LDOS). 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.

	STX	LDOS	Difference
Sharpe ratio: Return per unit of total volatility	9.54	-0.56	+10.10
Sortino ratio: Return per unit of downside risk	6.19	-0.60	+6.79
Omega ratio: Gain probability vs. loss probability	1.80	0.92	+0.88
Calmar ratio: Return relative to maximum drawdown	28.81	-0.43	+29.24
Martin ratio: Return relative to average drawdown	84.36	-1.12	+85.48
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

STX vs. LDOS - Sharpe Ratio Comparison

The current STX Sharpe Ratio is 9.54, which is higher than the LDOS Sharpe Ratio of -0.56. The chart below compares the historical Sharpe Ratios of STX and LDOS, 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

	STX	LDOS	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	9.54	-0.56	+10.10
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	1.34	0.17	+1.17
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	1.19	0.55	+0.64
Sharpe Ratio (All Time) Calculated using the full available price history	0.53	0.23	+0.30

Drawdowns

STX vs. LDOS - Drawdown Comparison

The maximum STX drawdown since its inception was -88.74%, which is greater than LDOS's maximum drawdown of -54.72%. Use the drawdown chart below to compare losses from any high point for STX and LDOS.

Drawdown Indicators

	STX	LDOS	Difference
Max Drawdown Largest peak-to-trough decline	-88.74%	-54.72%	-34.02%
Max Drawdown (1Y) Largest decline over 1 year	-21.00%	-38.17%	+17.17%
Max Drawdown (3Y) Largest decline over 3 years	-40.00%	-38.17%	-1.83%
Max Drawdown (5Y) Largest decline over 5 years	-56.99%	-38.17%	-18.82%
Max Drawdown (10Y) Largest decline over 10 years	-56.99%	-42.29%	-14.70%
Current Drawdown Current decline from peak	-6.80%	-38.17%	+31.37%
Average Drawdown Average peak-to-trough decline	-26.45%	-19.67%	-6.78%
Ulcer Index Depth and duration of drawdowns from previous peaks	7.16%	14.55%	-7.39%

Volatility

STX vs. LDOS - Volatility Comparison

Seagate Technology plc (STX) has a higher volatility of 17.98% compared to Leidos Holdings, Inc. (LDOS) at 7.17%. This indicates that STX's price experiences larger fluctuations and is considered to be riskier than LDOS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	STX	LDOS	Difference
Volatility (1M) Calculated over the trailing 1-month period	17.98%	7.17%	+10.81%
Volatility (6M) Calculated over the trailing 6-month period	49.95%	25.18%	+24.77%
Volatility (1Y) Calculated over the trailing 1-year period	63.55%	29.33%	+34.22%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	44.63%	26.74%	+17.89%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	42.18%	27.50%	+14.68%

Dividends

STX vs. LDOS - Dividend Comparison

STX's dividend yield for the trailing twelve months is around 0.33%, less than LDOS's 1.35% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
LDOS Leidos Holdings, Inc.	1.35%	0.90%	1.07%	1.35%	1.37%	1.57%	1.29%	1.35%	2.43%	1.98%	29.17%	3.41%
STX Seagate Technology plc	0.33%	1.05%	3.27%	3.28%	5.32%	2.40%	4.21%	4.27%	6.53%	6.02%	6.60%	6.14%

Financials

STX vs. LDOS - Profitability Comparison

The chart below illustrates the profitability comparison between Seagate Technology plc and Leidos Holdings, Inc. over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

STX - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Seagate Technology plc reported a gross profit of 1.45B and revenue of 3.11B. Therefore, the gross margin over that period was 46.5%.

LDOS - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Leidos Holdings, Inc. reported a gross profit of 761.00M and revenue of 4.40B. Therefore, the gross margin over that period was 17.3%.

STX - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Seagate Technology plc reported an operating income of 982.00M and revenue of 3.11B, resulting in an operating margin of 31.6%.

LDOS - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Leidos Holdings, Inc. reported an operating income of 508.00M and revenue of 4.40B, resulting in an operating margin of 11.6%.

STX - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Seagate Technology plc reported a net income of 748.00M and revenue of 3.11B, resulting in a net margin of 24.0%.

LDOS - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Leidos Holdings, Inc. reported a net income of 328.00M and revenue of 4.40B, resulting in a net margin of 7.5%.

Frequently Asked Questions

Can I hold both STX and LDOS in my portfolio?

STX and LDOS have a correlation of 0.02, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, STX or LDOS?

STX has higher volatility (17.98%) compared to LDOS (7.17%). In terms of maximum drawdown, STX dropped -88.74% vs LDOS's -54.72%.

Which has better risk-adjusted returns?

STX currently has the higher Sharpe Ratio (9.54 vs -0.56), 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.