Which has the lower trailing P/E, AMTM or SITE?

AMTM has the lower trailing P/E: AMTM trades at 24.83 and SITE at 26.24. P/E is one valuation measure and does not by itself establish which business is cheaper.

Is AMTM or SITE more profitable?

SITE runs the higher net margin — AMTM at 1.44% versus SITE at 3.41%.

Amentum Holdings, Inc. (AMTM) vs SiteOne Landscape Supply, Inc. (SITE)

A side-by-side comparison of Amentum Holdings, Inc. and SiteOne Landscape Supply, Inc. across valuation, profitability, dividends, and growth — built entirely from reported fundamentals, as of August 27, 2026. Differences are shown without an overall score or investment verdict.

AMTM

Amentum Holdings, Inc.

$4.99B

$20.43IndustrialsDelayed quote: Aug 27, 2026, 4:00 PM EDT

SITE

SiteOne Landscape Supply, Inc.

$4.17B

$95.50IndustrialsDelayed quote: Aug 27, 2026, 4:00 PM EDT

Total return — AMTM vs SITE

growth of $100 · dividends reinvested · last 2y

AMTM -30.2% (-16.4%/yr)SITE -35.6% (-19.8%/yr)AMTM compounded faster over this window

AMTM SITE

AMTM vs SITE: by the numbers

•AMTM is the larger company ($4.99B vs $4.17B market cap).
•AMTM trades at the lower trailing earnings multiple (24.83 vs 26.24 P/E), one valuation lens rather than an overall verdict.
•SITE converts more revenue to profit (3.41% vs 1.44% net margin).

Metrics side by side

Valuation

Metric	AMTM	SITE
P/E ratio	24.83	26.24
Forward P/E	8.40	23.04
P/S ratio	0.36	0.89
P/B ratio	1.08	2.52
EV / EBITDA	8.04	10.90
FCF yield	9.61%	6.09%

Profitability

Metric	AMTM	SITE
Gross margin	8.73%	35.13%
Operating margin	4.10%	5.28%
Net margin	1.44%	3.41%
ROE	4.35%	9.65%
ROIC	4.71%	7.00%

Growth (annualized)

Metric	AMTM	SITE
Revenue CAGR (5Y)	N/A	10.04%
EPS CAGR (5Y)	N/A	3.68%
FCF CAGR (5Y)	N/A	3.21%
Total return CAGR (5Y)	N/A	-13.76%

Frequently asked

Which has the lower trailing P/E, AMTM or SITE?: AMTM has the lower trailing P/E: AMTM trades at 24.83 and SITE at 26.24. P/E is one valuation measure and does not by itself establish which business is cheaper.
Is AMTM or SITE more profitable?: SITE runs the higher net margin — AMTM at 1.44% versus SITE at 3.41%.

Go deeper

Full AMTM analysis Full SITE analysis Interactive comparison tool

Dig into the metrics

Amentum P/E ratio SiteOne Landscape Supply P/E ratio Amentum ROE SiteOne Landscape Supply ROE Amentum operating margin SiteOne Landscape Supply operating margin Amentum revenue growth SiteOne Landscape Supply revenue growth Amentum free cash flow SiteOne Landscape Supply free cash flow

Amentum & SiteOne Landscape Supply appear in these rankings

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 27, 2026.