Which has the lower trailing P/E, MRK or TMO?

TMO has the lower trailing P/E: MRK trades at 36.68 and TMO at 30.89. P/E is one valuation measure and does not by itself establish which business is cheaper.

Which has grown faster, MRK or TMO?

Over the past five years, MRK grew revenue faster — MRK at a 8.60% CAGR versus TMO at 5.00%.

Does MRK or TMO pay a bigger dividend?

MRK yields 2.58% and TMO yields 0.31% based on trailing dividends and the latest price.

Is MRK or TMO more profitable?

TMO runs the higher net margin — MRK at 13.62% versus TMO at 15.06%.

How have MRK and TMO total returns compared?

Over the past 10 years, MRK delivered 12.20% and TMO delivered 14.03% annualized total return. Past performance doesn't predict future results.

Merck & Co., Inc. (MRK) vs Thermo Fisher Scientific Inc. (TMO)

A side-by-side comparison of Merck & Co., Inc. and Thermo Fisher Scientific Inc. across valuation, profitability, dividends, and growth — built entirely from reported fundamentals, as of August 2, 2026. Differences are shown without an overall score or investment verdict.

MRK

Merck & Co., Inc.

$321.62B

$130.20HealthcareAt close: Jul 31, 2026, 4:00 PM ET

TMO

Thermo Fisher Scientific Inc.

$213.42B

$574.30HealthcareAt close: Jul 31, 2026, 4:00 PM ET

Total return — MRK vs TMO

growth of $100 · dividends reinvested · last 30y

MRK +981.4%TMO +1765.4%TMO compounded faster

MRK TMO

MRK vs TMO: by the numbers

•MRK is the larger company ($321.62B vs $213.42B market cap).
•TMO trades at the lower trailing earnings multiple (30.89 vs 36.68 P/E), one valuation lens rather than an overall verdict.
•TMO converts more revenue to profit (15.06% vs 13.62% net margin).
•MRK grew revenue faster over the past five years (8.60% vs 5.00% CAGR).
•MRK pays the higher dividend yield (2.58% vs 0.31%).

Metrics side by side

Valuation

Metric	MRK	TMO
P/E ratio	36.68	30.89
Forward P/E	47.10	22.90
P/S ratio	4.91	4.60
P/B ratio	7.02	4.04
PEG ratio	1.81	4.54
EV / EBITDA	15.11	23.96
FCF yield	4.39%	3.43%

Profitability

Metric	MRK	TMO
Gross margin	75.91%	40.37%
Operating margin	36.17%	17.69%
Net margin	13.62%	15.06%
ROE	19.48%	13.24%
ROIC	18.27%	7.58%

Dividends

Metric	MRK	TMO
Dividend yield	2.58%	0.31%
Payout ratio	46.03%	10.13%

Growth (annualized)

Metric	MRK	TMO
Revenue CAGR (5Y)	8.60%	5.00%
EPS CAGR (5Y)	21.21%	1.99%
FCF CAGR (5Y)	15.69%	-1.83%
Total return CAGR (5Y)	14.62%	1.52%

Frequently asked

Which has the lower trailing P/E, MRK or TMO?: TMO has the lower trailing P/E: MRK trades at 36.68 and TMO at 30.89. P/E is one valuation measure and does not by itself establish which business is cheaper.
Which has grown faster, MRK or TMO?: Over the past five years, MRK grew revenue faster — MRK at a 8.60% CAGR versus TMO at 5.00%.
Does MRK or TMO pay a bigger dividend?: MRK yields 2.58% and TMO yields 0.31% based on trailing dividends and the latest price.
Is MRK or TMO more profitable?: TMO runs the higher net margin — MRK at 13.62% versus TMO at 15.06%.
How have MRK and TMO total returns compared?: Over the past 10 years, MRK delivered 12.20% and TMO delivered 14.03% annualized total return. Past performance doesn't predict future results.

Go deeper

Full MRK analysis Full TMO analysis Interactive comparison tool

Dig into the metrics

Merck & P/E ratio Thermo Fisher Scientific P/E ratio Merck & dividend yield Thermo Fisher Scientific dividend yield Merck & ROE Thermo Fisher Scientific ROE Merck & operating margin Thermo Fisher Scientific operating margin Merck & revenue growth Thermo Fisher Scientific revenue growth Merck & free cash flow Thermo Fisher Scientific free cash flow

Merck & & Thermo Fisher Scientific appear in these rankings

Highest Dividend Yield Stocks Highest ROIC Stocks Highest Operating Margin Stocks Highest FCF Yield Stocks

Figures are sourced from reported fundamentals and the latest end-of-day price. This comparison is informational only and is not investment advice. Past performance does not predict future results. See our methodology. Compiled by TGMCharts Research · data verified August 2, 2026.