MLM vs. PKX: Martin Marietta Materials vs. POSCO Stock Comparison

November 11, 2026

How do Martin Marietta Materials (MLM) and POSCO (PKX) stack up? This page sets them side by side across company profile, performance and risk, profitability, growth, financial strength, dividends, and valuation, with selected fundamentals also measured against each stock's industry-group peers.

Company Profile

Martin Marietta Materials (MLM) and POSCO (PKX) both fall under the Materials industry group, but MLM is classified in Construction Materials while PKX is classified in Metals & Mining.

Martin Marietta Materials (MLM) trades as ordinary local shares, while POSCO (PKX) trades as an ADR — compare with FX exposure, depositary-program fees, and dividend-withholding-tax differences in mind.

Company profile comparison for Martin Marietta Materials (MLM) and POSCO (PKX)
Profile Item	MLM	PKX
Name	Martin Marietta Materials, Inc.	POSCO Holdings Inc. American Depositary Receipt
Country/Region	United States	South Korea
GICS Sector	Materials	Materials
GICS Industry Group	Materials	Materials
GICS Industry	Construction Materials	Metals & Mining
GICS Sub-Industry	Construction Materials	Steel
Market Capitalization	36.85 billion USD	14.79 billion USD
Currency	USD	USD
Exchange	NYSE	NYSE
Listing Date	February 17, 1994	October 14, 1994
Security Type	Common Stock	ADR

Price Performance

Cumulative Growth

MLM

PKX

GSPC

Martin Marietta Materials (MLM) vs. POSCO (PKX), with S&P 500 (GSPC) for reference: Growth of a $10,000 investment over the past five years. Adjusted for dividends and splits.

Trailing Returns

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Trailing total returns for Martin Marietta Materials (MLM) and POSCO (PKX). Returns over one year are annualized.

Calendar-Year Returns

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Calendar-year total returns for Martin Marietta Materials (MLM) and POSCO (PKX). Each bar is that year's total return, measured year-end to year-end.

Performance Metrics

Price performance metrics for Martin Marietta Materials (MLM) and POSCO (PKX)
Metric	MLM	PKX
Total Return (1Y)	-12.23%	-4.84%
Total Return (3Y, Annualized)	6.32%	-15.65%
Total Return (5Y, Annualized)	5.43%	-1.81%

Risk Profile

Drawdown History

MLM

PKX

GSPC

Martin Marietta Materials (MLM) vs. POSCO (PKX), with S&P 500 (GSPC) for reference: Drawdown from the running peak over the past five years. Each line shows the decline from its prior peak; 0% marks a new high.

Return Distribution

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Distribution of monthly total returns for Martin Marietta Materials (MLM) and POSCO (PKX). Each bar is the share of months whose return fell in that 5% bucket.

Risk Metrics

Risk profile metrics for Martin Marietta Materials (MLM) and POSCO (PKX)
Metric	MLM	PKX
Volatility (1Y, Annualized)	29.72%	46.00%
Beta (5Y)	1.02	1.71
Max Drawdown (5Y)	-33.19%	-68.71%
Avg. Volume (3M)	805.11K	216.95K

Risk-Adjusted Performance

Risk-Return Positioning

MLM and PKX are plotted by 1-year volatility (risk) and 1-year return. The dashed Capital Allocation Line runs from the risk-free rate through the shared industry median.

Risk-Adjusted Metrics

Risk-adjusted metrics for Martin Marietta Materials (MLM) and POSCO (PKX)
Metric	MLM	PKX
Sharpe Ratio (1Y)	-0.56	-0.20
Sortino Ratio (1Y)	-0.75	-0.30

Profitability

ROE (TTM)

Both Martin Marietta Materials (MLM) at 6.02% and POSCO (PKX) at 2.21% land near their industries’ usual ROE ranges, so capital efficiency looks broadly in line with peers on both sides.

MLM

Materials industry group

6.02%

Max: 52.88%
Q3: 19.49%
Median: 8.76%
MLM: 6.02%
Q1: -3.41%
Min: -32.81%

PKX

Materials industry group

2.21%

Max: 52.88%
Q3: 19.49%
Median: 8.76%
PKX: 2.21%
Q1: -3.41%
Min: -32.81%

Martin Marietta Materials (MLM) vs. POSCO (PKX): A comparison of their ROE against the Materials industry group benchmark.

Net Margin (TTM)

Martin Marietta Materials (MLM) at 31.88% retains a top-quartile share of revenue as profit, ahead of POSCO (PKX) at 1.89%, which keeps about the industry-typical share.

MLM

Materials industry group

31.88%

Max: 38.66%
MLM: 31.88%
Q3: 15.98%
Median: 5.28%
Q1: 0.00%
Min: -20.40%

PKX

Materials industry group

1.89%

Max: 38.66%
Q3: 15.98%
Median: 5.28%
PKX: 1.89%
Q1: 0.00%
Min: -20.40%

Martin Marietta Materials (MLM) vs. POSCO (PKX): A comparison of their net margin against the Materials industry group benchmark.

Operating Margin (TTM)

Both Martin Marietta Materials (MLM) at 22.29% and POSCO (PKX) at 4.26% run core operations about as efficiently as their industries’ norm — neither stands out on operating profitability.

MLM

Materials industry group

22.29%

Max: 66.70%
Q3: 28.92%
MLM: 22.29%
Median: 12.56%
Q1: 3.28%
Min: -14.07%

PKX

Materials industry group

4.26%

Max: 66.70%
Q3: 28.92%
Median: 12.56%
PKX: 4.26%
Q1: 3.28%
Min: -14.07%

Martin Marietta Materials (MLM) vs. POSCO (PKX): A comparison of their operating margin against the Materials industry group benchmark.

Profitability Metrics

Profitability metrics for Martin Marietta Materials (MLM) and POSCO (PKX)
Metric	MLM	PKX
ROE (TTM)	6.02%	2.21%
ROA (TTM)	3.27%	1.31%
Net Margin (TTM)	31.88%	1.89%
Operating Margin (TTM)	22.29%	4.26%
Gross Margin (TTM)	26.74%	7.87%

Growth

Revenue Growth

Martin Marietta Materials (MLM) at 8.62% is around its peer norm for revenue growth, while POSCO (PKX) at -6.09% drops into the bottom quartile, signaling weaker demand or pricing momentum.

Martin Marietta Materials (MLM) vs. POSCO (PKX): A comparison of their Revenue Growth across different time periods.

EPS Growth

Both Martin Marietta Materials (MLM) at -42.09% and POSCO (PKX) at -29.00% land near their industries' usual EPS growth ranges, so bottom-line momentum looks broadly in line with peers on both sides.

Martin Marietta Materials (MLM) vs. POSCO (PKX): A comparison of their EPS Growth across different time periods.

Growth Metrics

Growth metrics for Martin Marietta Materials (MLM) and POSCO (PKX)
Metric	MLM	PKX
Revenue Growth (YoY)	8.62%	-6.09%
Revenue Growth (3Y CAGR)	-0.06%	-6.72%
EPS Growth (YoY)	-42.09%	-29.00%
EPS Growth (3Y CAGR)	10.61%	-39.42%

Financial Strength

Current Ratio (MRQ)

Both Martin Marietta Materials (MLM) at 1.63 and POSCO (PKX) at 1.98 carry current ratio within their industries’ typical mid-ranges, suggesting balanced short-term liquidity relative to peers.

MLM

Materials industry group

1.63

Max: 5.96
Q3: 3.30
Median: 2.24
MLM: 1.63
Q1: 1.45
Min: 0.16

PKX

Materials industry group

1.98

Max: 5.96
Q3: 3.30
Median: 2.24
PKX: 1.98
Q1: 1.45
Min: 0.16

Martin Marietta Materials (MLM) vs. POSCO (PKX): A comparison of their current ratio against the Materials industry group benchmark.

Debt / Equity (MRQ)

Both Martin Marietta Materials (MLM) at 0.75 and POSCO (PKX) at 0.50 fund their balance sheets with roughly industry-typical debt-to-equity mixes.

MLM

Materials industry group

0.75

Max: 1.98
Q3: 0.89
MLM: 0.75
Median: 0.47
Q1: 0.13
Min: 0.00

PKX

Materials industry group

0.50

Max: 1.98
Q3: 0.89
PKX: 0.50
Median: 0.47
Q1: 0.13
Min: 0.00

Martin Marietta Materials (MLM) vs. POSCO (PKX): A comparison of their debt-to-equity ratio against the Materials industry group benchmark.

Financial Strength Metrics

Financial strength metrics for Martin Marietta Materials (MLM) and POSCO (PKX)
Metric	MLM	PKX
Current Ratio (MRQ)	1.63	1.98
Debt / Equity (MRQ)	0.75	0.50
Net Debt / EBITDA	5.88	2.81

Dividends

Dividend Yield (TTM)

Martin Marietta Materials (MLM) at 0.63% pays an industry-typical yield; POSCO (PKX) at 18,518.52% is above its entire peer range — the higher number, but one that calls for a look at payout sustainability before treating it as an advantage.

MLM

Materials industry group

0.63%

Max: 4.52%
Q3: 1.85%
MLM: 0.63%
Median: 0.38%
Q1: 0.00%
Min: 0.00%

PKX

Materials industry group

18,518.52%

PKX: 18,518.52%
Max: 4.52%
Q3: 1.85%
Median: 0.38%
Q1: 0.00%
Min: 0.00%

Martin Marietta Materials (MLM) vs. POSCO (PKX): A comparison of their dividend yield against the Materials industry group benchmark.

Dividend Payout Ratio (TTM)

Martin Marietta Materials (MLM) at 24.85% pays out a band-typical share of earnings, while POSCO (PKX) at 51.60% distributes more than its industry norm — less retained, thinner cover.

MLM

Materials industry group

24.85%

Max: 83.62%
Q3: 41.37%
MLM: 24.85%
Median: 9.54%
Q1: 0.00%
Min: 0.00%

PKX

Materials industry group

51.60%

Max: 83.62%
PKX: 51.60%
Q3: 41.37%
Median: 9.54%
Q1: 0.00%
Min: 0.00%

Martin Marietta Materials (MLM) vs. POSCO (PKX): A comparison of their payout ratio against the Materials industry group benchmark.

Dividend Metrics

Dividend metrics for Martin Marietta Materials (MLM) and POSCO (PKX)
Metric	MLM	PKX
Dividend Yield (TTM)	0.63%	18,518.52%
Dividend Payout Ratio (TTM)	24.85%	51.60%

Valuation

P/E Ratio (TTM)

POSCO (PKX) at 15.57 is near its industry’s usual P/E ratio, while Martin Marietta Materials (MLM) at 38.67 sits in the richer quartile — MLM needs stronger growth or earnings quality to justify the premium.

MLM

Materials industry group

38.67

Max: 59.00
MLM: 38.67
Q3: 32.93
Median: 18.82
Q1: 11.96
Min: 3.93

PKX

Materials industry group

15.57

Max: 59.00
Q3: 32.93
Median: 18.82
PKX: 15.57
Q1: 11.96
Min: 3.93

Martin Marietta Materials (MLM) vs. POSCO (PKX): A comparison of their P/E ratio against the Materials industry group benchmark.

P/S Ratio (TTM)

POSCO (PKX) at 0.00 looks cheap on sales in the lower P/S ratio quartile, while Martin Marietta Materials (MLM) at 5.11 looks rich in the upper quartile — a clear gap in price per dollar of revenue.

MLM

Materials industry group

5.11

Max: 9.62
MLM: 5.11
Q3: 4.34
Median: 1.87
Q1: 0.73
Min: 0.00

PKX

Materials industry group

0.00

Max: 9.62
Q3: 4.34
Median: 1.87
Q1: 0.73
PKX: 0.00
Min: 0.00

Martin Marietta Materials (MLM) vs. POSCO (PKX): A comparison of their P/S ratio against the Materials industry group benchmark.

P/B Ratio (MRQ)

On P/B ratio, both Martin Marietta Materials (MLM) at 2.09 and POSCO (PKX) at 1.36 are valued close to their industries’ norm against book — neither stands out from peers.

MLM

Materials industry group

2.09

Max: 6.59
Q3: 3.55
MLM: 2.09
Median: 2.08
Q1: 1.26
Min: -0.17

PKX

Materials industry group

1.36

Max: 6.59
Q3: 3.55
Median: 2.08
PKX: 1.36
Q1: 1.26
Min: -0.17

Martin Marietta Materials (MLM) vs. POSCO (PKX): A comparison of their P/B ratio against the Materials industry group benchmark.

Valuation Metrics

Valuation metrics for Martin Marietta Materials (MLM) and POSCO (PKX)
Metric	MLM	PKX
P/E Ratio (TTM)	38.67	15.57
P/S Ratio (TTM)	5.11	0.00
P/B Ratio (MRQ)	2.09	1.36
Free Cash Flow Yield (TTM)	4.54%	-23,410.34%