DGX vs. PHG: Quest Diagnostics vs. Koninklijke Philips Stock Comparison

November 11, 2026

How do Quest Diagnostics (DGX) and Koninklijke Philips (PHG) 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

Quest Diagnostics (DGX) and Koninklijke Philips (PHG) both fall under the Health Care Equipment & Services industry group, but DGX is classified in Health Care Providers & Services while PHG is classified in Health Care Equipment & Supplies.

Quest Diagnostics (DGX) trades as ordinary local shares, while Koninklijke Philips (PHG) trades as an ADR — compare with FX exposure, depositary-program fees, and dividend-withholding-tax differences in mind.

Company profile comparison for Quest Diagnostics (DGX) and Koninklijke Philips (PHG)
Profile Item	DGX	PHG
Name	Quest Diagnostics Incorporated	Koninklijke Philips N.V. ADR
Country/Region	United States	Netherlands
GICS Sector	Health Care	Health Care
GICS Industry Group	Health Care Equipment & Services	Health Care Equipment & Services
GICS Industry	Health Care Providers & Services	Health Care Equipment & Supplies
GICS Sub-Industry	Health Care Services	Health Care Equipment
Market Capitalization	28.21 billion USD	29.67 billion USD
Currency	USD	USD
Exchange	NYSE	NYSE
Listing Date	December 17, 1996	March 17, 1980
Security Type	Common Stock	ADR

Price Performance

Cumulative Growth

DGX

PHG

GSPC

Quest Diagnostics (DGX) vs. Koninklijke Philips (PHG), 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 Quest Diagnostics (DGX) and Koninklijke Philips (PHG). Returns over one year are annualized.

Calendar-Year Returns

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Calendar-year total returns for Quest Diagnostics (DGX) and Koninklijke Philips (PHG). Each bar is that year's total return, measured year-end to year-end.

Performance Metrics

Price performance metrics for Quest Diagnostics (DGX) and Koninklijke Philips (PHG)
Metric	DGX	PHG
Total Return (1Y)	45.88%	13.15%
Total Return (3Y, Annualized)	27.45%	18.95%
Total Return (5Y, Annualized)	14.84%	-6.38%

Risk Profile

Drawdown History

DGX

PHG

GSPC

Quest Diagnostics (DGX) vs. Koninklijke Philips (PHG), 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 Quest Diagnostics (DGX) and Koninklijke Philips (PHG). Each bar is the share of months whose return fell in that 5% bucket.

Risk Metrics

Risk profile metrics for Quest Diagnostics (DGX) and Koninklijke Philips (PHG)
Metric	DGX	PHG
Volatility (1Y, Annualized)	24.06%	29.55%
Beta (5Y)	0.54	0.65
Max Drawdown (5Y)	-28.62%	-74.51%
Avg. Volume (3M)	1.00M	1.08M

Risk-Adjusted Performance

Risk-Return Positioning

DGX and PHG 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 Quest Diagnostics (DGX) and Koninklijke Philips (PHG)
Metric	DGX	PHG
Sharpe Ratio (1Y)	1.73	0.30
Sortino Ratio (1Y)	3.16	0.48

Profitability

ROE (TTM)

Quest Diagnostics (DGX) at 15.32% sits in the top ROE quartile, while Koninklijke Philips (PHG) at 8.61% is closer to the peer norm — stronger capital efficiency for DGX.

DGX

Health Care Equipment & Services industry group

15.32%

Max: 47.61%
DGX: 15.32%
Q3: 14.36%
Median: 5.45%
Q1: -10.67%
Min: -47.01%

PHG

Health Care Equipment & Services industry group

8.61%

Max: 47.61%
Q3: 14.36%
PHG: 8.61%
Median: 5.45%
Q1: -10.67%
Min: -47.01%

Quest Diagnostics (DGX) vs. Koninklijke Philips (PHG): A comparison of their ROE against the Health Care Equipment & Services industry group benchmark.

Net Margin (TTM)

Quest Diagnostics (DGX) at 9.54% retains a top-quartile share of revenue as profit, ahead of Koninklijke Philips (PHG) at 5.39%, which keeps about the industry-typical share.

DGX

Health Care Equipment & Services industry group

9.54%

Max: 29.35%
DGX: 9.54%
Q3: 9.33%
Median: 2.18%
Q1: -6.29%
Min: -28.46%

PHG

Health Care Equipment & Services industry group

5.39%

Max: 29.35%
Q3: 9.33%
PHG: 5.39%
Median: 2.18%
Q1: -6.29%
Min: -28.46%

Quest Diagnostics (DGX) vs. Koninklijke Philips (PHG): A comparison of their net margin against the Health Care Equipment & Services industry group benchmark.

Operating Margin (TTM)

Quest Diagnostics (DGX) at 15.63% operates in the top operating margin quartile, ahead of Koninklijke Philips (PHG) at 3.76%, which runs around its industry’s norm.

DGX

Health Care Equipment & Services industry group

15.63%

Max: 35.43%
DGX: 15.63%
Q3: 14.14%
Median: 6.81%
Q1: -0.28%
Min: -16.29%

PHG

Health Care Equipment & Services industry group

3.76%

Max: 35.43%
Q3: 14.14%
Median: 6.81%
PHG: 3.76%
Q1: -0.28%
Min: -16.29%

Quest Diagnostics (DGX) vs. Koninklijke Philips (PHG): A comparison of their operating margin against the Health Care Equipment & Services industry group benchmark.

Profitability Metrics

Profitability metrics for Quest Diagnostics (DGX) and Koninklijke Philips (PHG)
Metric	DGX	PHG
ROE (TTM)	15.32%	8.61%
ROA (TTM)	6.61%	3.59%
Net Margin (TTM)	9.54%	5.39%
Operating Margin (TTM)	15.63%	3.76%
Gross Margin (TTM)	33.18%	46.43%

Growth

Revenue Growth

Quest Diagnostics (DGX) at 11.78% is around its peer norm for revenue growth, while Koninklijke Philips (PHG) at -1.04% drops into the bottom quartile, signaling weaker demand or pricing momentum.

Quest Diagnostics (DGX) vs. Koninklijke Philips (PHG): A comparison of their Revenue Growth across different time periods.

EPS Growth

Only one side can be read here: Quest Diagnostics (DGX) reports EPS growth of 13.78%, ranked against its industry; Koninklijke Philips (PHG) has no EPS growth figure this period.

Quest Diagnostics (DGX) vs. Koninklijke Philips (PHG): A comparison of their EPS Growth across different time periods.

Growth Metrics

Growth metrics for Quest Diagnostics (DGX) and Koninklijke Philips (PHG)
Metric	DGX	PHG
Revenue Growth (YoY)	11.78%	-1.04%
Revenue Growth (3Y CAGR)	3.74%	0.01%
EPS Growth (YoY)	13.78%	--
EPS Growth (3Y CAGR)	3.16%	--

Financial Strength

Current Ratio (MRQ)

Quest Diagnostics (DGX) at 1.70 keeps current ratio within its industry’s typical mid-range, while Koninklijke Philips (PHG) at 1.33 runs in the tighter-liquidity quartile — a thinner cushion against current liabilities for PHG.

DGX

Health Care Equipment & Services industry group

1.70

Max: 7.59
Q3: 4.00
Median: 1.98
DGX: 1.70
Q1: 1.37
Min: 0.30

PHG

Health Care Equipment & Services industry group

1.33

Max: 7.59
Q3: 4.00
Median: 1.98
Q1: 1.37
PHG: 1.33
Min: 0.30

Quest Diagnostics (DGX) vs. Koninklijke Philips (PHG): A comparison of their current ratio against the Health Care Equipment & Services industry group benchmark.

Debt / Equity (MRQ)

Both Quest Diagnostics (DGX) at 0.80 and Koninklijke Philips (PHG) at 0.70 fund their balance sheets with roughly industry-typical debt-to-equity mixes.

DGX

Health Care Equipment & Services industry group

0.80

Max: 1.88
Q3: 0.91
DGX: 0.80
Median: 0.58
Q1: 0.16
Min: 0.00

PHG

Health Care Equipment & Services industry group

0.70

Max: 1.88
Q3: 0.91
PHG: 0.70
Median: 0.58
Q1: 0.16
Min: 0.00

Quest Diagnostics (DGX) vs. Koninklijke Philips (PHG): A comparison of their debt-to-equity ratio against the Health Care Equipment & Services industry group benchmark.

Financial Strength Metrics

Financial strength metrics for Quest Diagnostics (DGX) and Koninklijke Philips (PHG)
Metric	DGX	PHG
Current Ratio (MRQ)	1.70	1.33
Debt / Equity (MRQ)	0.80	0.70
Net Debt / EBITDA	2.38	2.45

Dividends

Dividend Yield (TTM)

Koninklijke Philips (PHG) pays no dividend (yield 0.00%) — it may be reinvesting, using buybacks, or simply not returning cash through dividends. Meanwhile Quest Diagnostics (DGX) reports a yield of 1.33%, ranking against industry peers normally.

DGX

Health Care Equipment & Services industry group

1.33%

DGX: 1.33%
Max: 0.00%
Q3: 0.00%
Median: 0.00%
Q1: 0.00%
Min: 0.00%

PHG

Health Care Equipment & Services industry group

0.00%

PHG: 0.00%
Max: 0.00%
Q3: 0.00%
Median: 0.00%
Q1: 0.00%
Min: 0.00%

Quest Diagnostics (DGX) vs. Koninklijke Philips (PHG): A comparison of their dividend yield against the Health Care Equipment & Services industry group benchmark.

Dividend Payout Ratio (TTM)

Koninklijke Philips (PHG) reports payout ratio above 100% at 211.79%, meaning dividends exceeded current-period earnings and sustainability needs extra context. Meanwhile Quest Diagnostics (DGX) reports 25.10%, ranking against industry peers normally.

DGX

Health Care Equipment & Services industry group

25.10%

DGX: 25.10%
Max: 0.00%
Q3: 0.00%
Median: 0.00%
Q1: 0.00%
Min: 0.00%

PHG

Health Care Equipment & Services industry group

211.79%

PHG: 211.79%
Max: 0.00%
Q3: 0.00%
Median: 0.00%
Q1: 0.00%
Min: 0.00%

Quest Diagnostics (DGX) vs. Koninklijke Philips (PHG): A comparison of their payout ratio against the Health Care Equipment & Services industry group benchmark.

Dividend Metrics

Dividend metrics for Quest Diagnostics (DGX) and Koninklijke Philips (PHG)
Metric	DGX	PHG
Dividend Yield (TTM)	1.33%	0.00%
Dividend Payout Ratio (TTM)	25.10%	211.79%

Valuation

P/E Ratio (TTM)

Quest Diagnostics (DGX) at 25.46 is near its industry’s usual P/E ratio, while Koninklijke Philips (PHG) at 63.23 sits in the richer quartile — PHG needs stronger growth or earnings quality to justify the premium.

DGX

Health Care Equipment & Services industry group

25.46

Max: 80.41
Q3: 47.62
Median: 29.93
DGX: 25.46
Q1: 21.19
Min: 4.21

PHG

Health Care Equipment & Services industry group

63.23

Max: 80.41
PHG: 63.23
Q3: 47.62
Median: 29.93
Q1: 21.19
Min: 4.21

Quest Diagnostics (DGX) vs. Koninklijke Philips (PHG): A comparison of their P/E ratio against the Health Care Equipment & Services industry group benchmark.

P/S Ratio (TTM)

On P/S ratio, both Quest Diagnostics (DGX) at 2.38 and Koninklijke Philips (PHG) at 1.67 are priced roughly in line with their industries — neither looks cheap nor rich on a sales basis.

DGX

Health Care Equipment & Services industry group

2.38

Max: 8.80
Q3: 4.32
DGX: 2.38
Median: 2.13
Q1: 1.10
Min: 0.03

PHG

Health Care Equipment & Services industry group

1.67

Max: 8.80
Q3: 4.32
Median: 2.13
PHG: 1.67
Q1: 1.10
Min: 0.03

Quest Diagnostics (DGX) vs. Koninklijke Philips (PHG): A comparison of their P/S ratio against the Health Care Equipment & Services industry group benchmark.

P/B Ratio (MRQ)

On P/B ratio, both Quest Diagnostics (DGX) at 3.68 and Koninklijke Philips (PHG) at 2.28 are valued close to their industries’ norm against book — neither stands out from peers.

DGX

Health Care Equipment & Services industry group

3.68

Max: 11.68
Q3: 6.12
DGX: 3.68
Median: 3.00
Q1: 1.73
Min: -1.31

PHG

Health Care Equipment & Services industry group

2.28

Max: 11.68
Q3: 6.12
Median: 3.00
PHG: 2.28
Q1: 1.73
Min: -1.31

Quest Diagnostics (DGX) vs. Koninklijke Philips (PHG): A comparison of their P/B ratio against the Health Care Equipment & Services industry group benchmark.

Valuation Metrics

Valuation metrics for Quest Diagnostics (DGX) and Koninklijke Philips (PHG)
Metric	DGX	PHG
P/E Ratio (TTM)	25.46	63.23
P/S Ratio (TTM)	2.38	1.67
P/B Ratio (MRQ)	3.68	2.28
Free Cash Flow Yield (TTM)	3.09%	6.23%