MRO vs. KOS

Last updated Jun 3, 2026

MRO (Marathon Oil Corporation) and KOS (Kosmos Energy Ltd.) are both stocks. Both operate in the Oil & Gas E&P industry within the Energy sector. A 0.58 correlation means they provide meaningful diversification when combined.

Performance

MRO vs. KOS - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Marathon Oil Corporation (MRO) and Kosmos Energy Ltd. (KOS). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

MRO

• 1D: —
• 1M: —
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

KOS

• 1D: 2.06%
• 1M: -7.19%
• YTD: 227.31%
• 6M: 177.57%
• 1Y: 68.75%
• 3Y*: -23.33%
• 5Y*: -2.55%
• 10Y*: -5.74%

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

MRO vs. KOS - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MRO Marathon Oil Corporation	0.00%	0.00%	20.15%	-9.29%	66.91%	149.77%	-50.38%	-3.93%	-14.37%	-0.82%
KOS Kosmos Energy Ltd.	227.31%	-73.47%	-49.03%	5.50%	83.82%	47.23%	-58.06%	44.22%	-40.58%	-2.28%

Correlation

The correlation between MRO and KOS is 0.58, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (3Y) Calculated over the trailing 3-year period	0.37
Correlation (5Y) Calculated over the trailing 5-year period	0.56
Correlation (10Y) Calculated over the trailing 10-year period	0.59
Correlation (All Time) Calculated using the full available price history since May 12, 2011	0.58

The correlation between MRO and KOS shifts across timeframes, from 0.37 (3 years) to 0.59 (10 years), reflecting how their relationship changes across market environments.

Fundamentals

Total Revenue (TTM) MRO : $6.58B KOS : $1.37B
Gross Profit (TTM) MRO : $3.50B KOS : $10.14M
EBITDA (TTM) MRO : $4.23B KOS : $95.79M

Return for Risk

MRO vs. KOS — Risk / Return Rank

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

KOS

KOS Risk / Return Rank: 65
KOS Sharpe Ratio Rank: 66
KOS Sortino Ratio Rank: 68
KOS Omega Ratio Rank: 63
KOS Calmar Ratio Rank: 64
KOS Martin Ratio Rank: 63

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.

MRO vs. KOS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Marathon Oil Corporation (MRO) and Kosmos Energy Ltd. (KOS). 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.

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

Sharpe Ratios by Period

	MRO	KOS	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	0.80	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	-0.04	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	-0.07	—
Sharpe Ratio (All Time) Calculated using the full available price history	—	-0.17	—

Drawdowns

Drawdown Indicators

	MRO	KOS	Difference
Max Drawdown Largest peak-to-trough decline	—	-97.11%	—
Max Drawdown (1Y) Largest decline over 1 year	—	-63.57%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-89.39%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-89.82%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-94.28%	—
Current Drawdown Current decline from peak	—	-83.83%	—
Average Drawdown Average peak-to-trough decline	—	-64.53%	—
Ulcer Index Depth and duration of drawdowns from previous peaks	—	31.19%	—

Volatility

Volatility by Period

	MRO	KOS	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	21.94%	—
Volatility (6M) Calculated over the trailing 6-month period	—	71.11%	—
Volatility (1Y) Calculated over the trailing 1-year period	—	86.47%	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	—	70.22%	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	—	76.93%	—

Dividends

MRO vs. KOS - Dividend Comparison

Neither MRO nor KOS has paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
KOS Kosmos Energy Ltd.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	1.92%	3.17%	0.00%	0.00%	0.00%	0.00%
MRO Marathon Oil Corporation	0.00%	0.00%	1.54%	1.70%	1.18%	1.10%	1.20%	1.47%	1.39%	1.18%	1.16%	5.40%

Financials

Frequently Asked Questions

Can I hold both MRO and KOS in my portfolio?

MRO and KOS have a correlation of 0.58, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.