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Side-by-side financial comparison of ICON PLC (ICLR) and Williams Companies (WMB). Click either name above to swap in a different company.

Williams Companies is the larger business by last-quarter revenue ($3.8B vs $2.0B, roughly 1.9× ICON PLC). Williams Companies runs the higher net margin — 19.1% vs 0.1%, a 19.0% gap on every dollar of revenue. On growth, Williams Companies posted the faster year-over-year revenue change (12.7% vs 0.6%). ICON PLC produced more free cash flow last quarter ($333.9M vs $-379.0M). Over the past eight quarters, Williams Companies's revenue compounded faster (7.3% CAGR vs 0.6%).

ICON plc is an Irish headquartered multinational healthcare intelligence and clinical research organisation. As of February 2025 had approximately 41,900 employees in 55 countries.

The Williams Companies, Inc. is an American energy company based in Tulsa, Oklahoma. Its core business is natural gas processing and transportation, with additional petroleum and electricity generation assets. A Fortune 500 company, its common stock is a component of the S&P 500.

ICLR vs WMB — Head-to-Head

Bigger by revenue
WMB
WMB
1.9× larger
WMB
$3.8B
$2.0B
ICLR
Growing faster (revenue YoY)
WMB
WMB
+12.0% gap
WMB
12.7%
0.6%
ICLR
Higher net margin
WMB
WMB
19.0% more per $
WMB
19.1%
0.1%
ICLR
More free cash flow
ICLR
ICLR
$712.9M more FCF
ICLR
$333.9M
$-379.0M
WMB
Faster 2-yr revenue CAGR
WMB
WMB
Annualised
WMB
7.3%
0.6%
ICLR

Income Statement — Q3 FY2025 vs Q4 FY2025

Metric
ICLR
ICLR
WMB
WMB
Revenue
$2.0B
$3.8B
Net Profit
$2.4M
$734.0M
Gross Margin
Operating Margin
4.2%
27.3%
Net Margin
0.1%
19.1%
Revenue YoY
0.6%
12.7%
Net Profit YoY
-98.8%
51.0%
EPS (diluted)
$0.03
$0.60

Green = leading value per metric. Periods may differ when fiscal calendars don't align.

8-Quarter Revenue & Profit Trend

Side-by-side quarterly history. Quarters aligned by calendar period so offset fiscal years line up.

Revenue
ICLR
ICLR
WMB
WMB
Q4 25
$3.8B
Q3 25
$2.0B
$3.5B
Q2 25
$2.0B
$3.4B
Q1 25
$2.0B
$4.2B
Q4 24
$3.4B
Q3 24
$2.0B
$3.0B
Q2 24
$2.1B
$2.8B
Q1 24
$2.1B
$3.3B
Net Profit
ICLR
ICLR
WMB
WMB
Q4 25
$734.0M
Q3 25
$2.4M
$647.0M
Q2 25
$183.0M
$546.0M
Q1 25
$154.2M
$691.0M
Q4 24
$486.0M
Q3 24
$197.1M
$706.0M
Q2 24
$146.9M
$401.0M
Q1 24
$187.4M
$632.0M
Operating Margin
ICLR
ICLR
WMB
WMB
Q4 25
27.3%
Q3 25
4.2%
31.8%
Q2 25
10.4%
28.0%
Q1 25
11.0%
26.1%
Q4 24
23.2%
Q3 24
14.1%
27.6%
Q2 24
10.8%
24.4%
Q1 24
13.7%
30.3%
Net Margin
ICLR
ICLR
WMB
WMB
Q4 25
19.1%
Q3 25
0.1%
18.5%
Q2 25
9.1%
16.2%
Q1 25
7.7%
16.5%
Q4 24
14.2%
Q3 24
9.7%
23.3%
Q2 24
6.9%
14.1%
Q1 24
9.0%
18.9%
EPS (diluted)
ICLR
ICLR
WMB
WMB
Q4 25
$0.60
Q3 25
$0.03
$0.53
Q2 25
$2.30
$0.45
Q1 25
$1.90
$0.56
Q4 24
$0.39
Q3 24
$2.36
$0.58
Q2 24
$1.76
$0.33
Q1 24
$2.25
$0.52

Balance Sheet & Financial Strength

Snapshot of each company's liquidity, leverage and book value from the latest quarter.

Metric
ICLR
ICLR
WMB
WMB
Cash + ST InvestmentsLiquidity on hand
$468.9M
Total DebtLower is stronger
$27.3B
Stockholders' EquityBook value
$9.3B
$12.8B
Total Assets
$16.5B
$58.6B
Debt / EquityLower = less leverage
2.13×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
ICLR
ICLR
WMB
WMB
Q4 25
Q3 25
$468.9M
Q2 25
$390.4M
Q1 25
$526.7M
Q4 24
Q3 24
$695.5M
Q2 24
$506.6M
Q1 24
$396.1M
Total Debt
ICLR
ICLR
WMB
WMB
Q4 25
$27.3B
Q3 25
$25.6B
Q2 25
$25.6B
Q1 25
$24.1B
Q4 24
$24.7B
Q3 24
$24.8B
Q2 24
$24.1B
Q1 24
$24.1B
Stockholders' Equity
ICLR
ICLR
WMB
WMB
Q4 25
$12.8B
Q3 25
$9.3B
$12.5B
Q2 25
$9.6B
$12.4B
Q1 25
$9.5B
$12.5B
Q4 24
$12.4B
Q3 24
$9.8B
$12.4B
Q2 24
$9.6B
$12.3B
Q1 24
$9.4B
$12.4B
Total Assets
ICLR
ICLR
WMB
WMB
Q4 25
$58.6B
Q3 25
$16.5B
$55.7B
Q2 25
$16.6B
$56.1B
Q1 25
$16.7B
$54.9B
Q4 24
$54.5B
Q3 24
$17.2B
$53.8B
Q2 24
$17.0B
$52.4B
Q1 24
$17.0B
$52.7B
Debt / Equity
ICLR
ICLR
WMB
WMB
Q4 25
2.13×
Q3 25
2.04×
Q2 25
2.06×
Q1 25
1.93×
Q4 24
1.99×
Q3 24
2.00×
Q2 24
1.96×
Q1 24
1.94×

Cash Flow & Capital Efficiency

How much cash each business actually produces after reinvestment. Cash flow is harder to manipulate than net income.

Metric
ICLR
ICLR
WMB
WMB
Operating Cash FlowLast quarter
$387.6M
$1.6B
Free Cash FlowOCF − Capex
$333.9M
$-379.0M
FCF MarginFCF / Revenue
16.3%
-9.9%
Capex IntensityCapex / Revenue
2.6%
50.9%
Cash ConversionOCF / Net Profit
164.59×
2.15×
TTM Free Cash FlowTrailing 4 quarters
$1.0B
$1.0B

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
ICLR
ICLR
WMB
WMB
Q4 25
$1.6B
Q3 25
$387.6M
$1.4B
Q2 25
$146.2M
$1.4B
Q1 25
$268.2M
$1.4B
Q4 24
$1.2B
Q3 24
$402.7M
$1.2B
Q2 24
$218.6M
$1.3B
Q1 24
$327.1M
$1.2B
Free Cash Flow
ICLR
ICLR
WMB
WMB
Q4 25
$-379.0M
Q3 25
$333.9M
$485.0M
Q2 25
$113.9M
$478.0M
Q1 25
$239.3M
$421.0M
Q4 24
$450.0M
Q3 24
$359.3M
$561.0M
Q2 24
$182.3M
$700.0M
Q1 24
$299.9M
$690.0M
FCF Margin
ICLR
ICLR
WMB
WMB
Q4 25
-9.9%
Q3 25
16.3%
13.9%
Q2 25
5.6%
14.2%
Q1 25
12.0%
10.1%
Q4 24
13.2%
Q3 24
17.7%
18.5%
Q2 24
8.6%
24.6%
Q1 24
14.3%
20.7%
Capex Intensity
ICLR
ICLR
WMB
WMB
Q4 25
50.9%
Q3 25
2.6%
27.3%
Q2 25
1.6%
28.8%
Q1 25
1.4%
24.2%
Q4 24
22.5%
Q3 24
2.1%
22.5%
Q2 24
1.7%
20.3%
Q1 24
1.3%
16.3%
Cash Conversion
ICLR
ICLR
WMB
WMB
Q4 25
2.15×
Q3 25
164.59×
2.22×
Q2 25
0.80×
2.66×
Q1 25
1.74×
2.07×
Q4 24
2.51×
Q3 24
2.04×
1.76×
Q2 24
1.49×
3.19×
Q1 24
1.74×
1.95×

Financial Flow Comparison

Revenue → gross profit → operating profit → net profit for each company.

Revenue Breakdown by Segment

ICLR
ICLR

Other Customers$681.3M33%
Clients1125$549.4M27%
Clients15$503.3M25%
Clients610$308.8M15%

WMB
WMB

Services$2.2B57%
Natural Gas Us Regulated$740.0M19%
West$730.0M19%
Non Regulated Service Commodity Consideration$51.0M1%
Natural Gas Gathering Transportation Marketing And Processing$45.0M1%
Affiliated Entity$23.0M1%
Other$14.0M0%
Other Service$11.0M0%

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