ACIW vs FOUR vs WEX Stock Comparison

Aci Worldwide, Shift4 Payments and Wex Prices as of Oct 27, 2026 Peers: Industry group
ACIW Aci Worldwide, Inc.
$54.66 +10.4% 1M +8.9% 1Y
Market cap
$5.56B
P/E
24.6x
Revenue (TTM)
$1.82B
Div. yield
–
Payment Processing Technology
4 wins
FOUR Shift4 Payments, Inc.
$37.78 -1.8% 1M -50.8% 1Y
Market cap
$3.01B
P/E
68.7x
Revenue (TTM)
$4.78B
Div. yield
–
Payment Processing Technology
2 wins
WEX WEX Inc.
$186.17 +4.4% 1M +15.7% 1Y
Market cap
$6.62B
P/E
18.9x
Revenue (TTM)
$2.79B
Div. yield
–
Payment Processing Technology
5 wins

Head to Head

11 decided of 12

Wex leads on 5 of the 12 questions below (Wex 5, Aci Worldwide 4, Shift4 Payments 2). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionACIWFOURWEXLeader
Larger companyMarket capitalisation $5.56B $3.01B $6.62B WEX
Cheaper on earningsLower P/E, profitable companies only 24.6x 68.7x 18.9x WEX
Cheaper on forward earningsLower price / next fiscal year consensus EPS 19.7x 6.9x 8.7x FOUR
Faster revenue growthRevenue growth, trailing twelve months +7.0% +32.4% +7.5% FOUR
More profitableNet margin, trailing twelve months 12.4% 0.9% 12.6% WEX
Better return on capitalReturn on invested capital 10.8% 4.9% 7.8% ACIW
Less leveragedLower net debt / EBITDA 1.9x 4.5x -0.7x WEX
Higher dividend yieldTrailing dividend yield 0.00% 0.00% 0.00% –
Better 1-year returnPrice return, last 12 months +8.9% -50.8% +15.7% WEX
Better 5-year returnAnnualised price return, 5 years +12.0%/yr -10.1%/yr +3.0%/yr ACIW
Less volatileAnnualised volatility, 1 year 34.9% 66.2% 41.7% ACIW
Higher overall scoreMean of the five percentile scores vs peers 68/100 66/100 54/100 ACIW

Percentile Scorecard

ACIWFOURWEX

Each axis is the mean percentile of its metrics against the company's industry group. 100 is the best in the group, 50 the middle.

Scores by Axis

AxisACIWFOURWEX
Valuation 77 #24 of 99 89 #12 of 99 71 #29 of 99
Growth 69 #30 of 94 70 #29 of 94 46 #51 of 94
Profitability 80 #19 of 90 67 #30 of 90 72 #26 of 90
Financial Health 60 #43 of 105 20 #84 of 105 32 #72 of 105
Shareholder Returns 57 #27 of 61 85 #10 of 61 47 #33 of 61
Overall 68 66 54
  • ACIW ranked among 109 companies in Fintech
  • FOUR ranked among 109 companies in Fintech
  • WEX ranked among 109 companies in Fintech

Price Performance

Price return, split-adjusted, before dividends. Click a name to hide or show it.

Returns

PeriodACIWFOURWEXSPY
1 month +10.4%-1.8%+4.4% -0.2%
3 months -8.9%-31.2%+1.8% +3.9%
6 months +24.4%-18.3%+22.1% +8.2%
Year to date +14.3%-40.0%+25.0% +12.9%
1 year +8.9%-50.8%+15.7% +12.3%
3 years +176.8%-13.4%+14.0% +87.4%
3 years, per year +40.4%-4.7%+4.5% +23.3%
5 years +76.4%-41.1%+15.7% +67.9%
5 years, per year +12.0%-10.1%+3.0% +10.9%
10 years +192.3%—+65.1% +261.1%
10 years, per year +11.3%—+5.1% +13.7%

Risk

MeasureACIWFOURWEXSPY
Volatility, 1Y 34.9%66.2%41.7% 12.7%
Downside volatility, 1Y 36.5%70.0%44.6% 12.7%
Beta vs S&P 500, 1Y 0.351.440.29 1.00
Return / volatility, 1Y 0.25-0.770.38 0.97
Max drawdown, 5Y -44.2%-71.7%-53.2% -25.4%
From 52-week high -9.2%-50.8%-8.4% -1.2%
52-week high $60.18$76.76$203.22 $779.14
52-week low $38.47$35.57$126.86 $631.97

Valuation History

Weekly multiples on trailing twelve-month fundamentals. Negative or extreme readings (a loss year, a collapsed denominator) are left out so the chart stays readable.

MultipleACIWFOURWEX
P/E now vs peer median 24.6xmedian 20.0x 68.4xmedian 20.0x 18.4xmedian 20.0x
P/S now vs peer median 3.0xmedian 2.3x 1.2xmedian 2.3x 2.3xmedian 2.3x
EV/EBITDA now vs peer median 17.5xmedian 17.5x 10.8xmedian 17.5x 5.4xmedian 17.5x
P/FCF now vs peer median 17.8xmedian 15.9x 13.6xmedian 15.9x 58.9xmedian 15.9x
P/B now vs peer median 3.7xmedian 2.0x 3.4xmedian 2.0x 4.7xmedian 2.0x
PEG now vs peer median 0.51median 1.03 -2.00median 1.03 0.66median 1.03

Financial History

Reported figures by fiscal period, placed on the calendar year (or quarter) each period ended in, so companies with different fiscal years line up.

Trailing twelve monthsACIWFOURWEX
Revenue $1.82B $4.78B $2.79B
Gross profit $893.35M $1.72B $1.66B
Operating income $338.68M $387.50M $711.30M
Net income $225.69M $122.40M $350.80M
Free cash flow $311.41M $433.00M $108.50M
R&D $179.52M – –
EPS (diluted) $2.22 $0.55 $10.05
Cash & equivalents $167.40M $356.00M $1.16B
Total debt $822.18M $4.51B $5.36B
Shares (diluted) 101.68M 79.64M 34.90M
Enterprise value $4.83B -$294.21M -$15.07B

All Metrics

58 metrics · best in bold

Bold marks the best reading: the lowest positive value for multiples, leverage and payout, the highest for everything else. The bar under each value is its percentile against that company's own peers. Hover a value for its rank and the peer median.

Valuation

12 metrics
MetricACIWFOURWEX
P/E 24.6x 68.4x 18.4x
P/FCF 17.8x 13.6x 58.9x
P/Operating cash flow 16.8x 9.9x 24.3x
P/S 3.0x 1.2x 2.3x
P/B 3.7x 3.4x 4.7x
P/Tangible book 3.7x -5.0x 22.0x
EV/EBITDA 17.5x 10.8x 5.4x
EV/EBIT 18.3x 25.9x 7.9x
EV/Revenue 3.4x 2.1x 2.0x
EV/FCF 19.9x 23.2x 52.0x
EV/Operating cash flow 18.8x 16.9x 21.5x
PEG (3Y EPS CAGR) 0.51 -2.00 0.66

Growth

14 metrics
MetricACIWFOURWEX
Revenue growth (1Y) 7.0% 32.4% 7.5%
Revenue CAGR (3Y) 9.9% 28.2% 4.2%
Gross profit growth (1Y) 4.5% 55.7% 7.5%
Gross profit CAGR (3Y) 10.6% 42.6% 3.9%
Operating income growth (1Y) 0.1% 41.2% 6.5%
Operating income CAGR (3Y) 34.9% 45.3% 13.2%
Net income growth (1Y) -10.1% -55.2% 14.5%
Net income CAGR (3Y) 44.8% -4.9% 19.1%
EPS growth (1Y) -7.1% -77.1% 12.9%
EPS CAGR (3Y) 48.0% -34.2% 28.0%
Operating cash flow growth (1Y) 6.9% 16.0% -38.1%
Operating cash flow CAGR (3Y) 35.3% 16.4% -37.9%
Free cash flow growth (1Y) 6.0% 8.8% -61.8%
Free cash flow CAGR (3Y) 37.8% 13.3% -51.8%

Profitability

14 metrics
MetricACIWFOURWEX
Gross margin 49.1% 35.9% 59.6%
EBITDA margin 19.4% 19.5% 37.3%
Operating margin 18.6% 8.1% 25.5%
Pretax margin 16.8% 3.2% 17.4%
Net margin 12.4% 0.9% 12.6%
FCF margin 17.1% 9.1% 3.9%
Operating cash flow margin 18.1% 12.4% 9.4%
Return on equity 15.1% 7.0% 26.8%
Return on assets 7.3% 1.4% 2.2%
Return on invested capital 10.8% 4.9% 7.8%
Return on capital employed 14.3% 5.5% 15.3%
Asset turnover 0.6x 0.5x 0.2x
Cash conversion (OCF / net income) 1.5x 4.8x 0.7x
Stock comp / revenue 4.3% 1.8% 4.3%

Financial Health

11 metrics
MetricACIWFOURWEX
Debt / assets 26.6% 51.9% 32.5%
Debt / equity 0.5x 2.6x 4.0x
Net debt / EBITDA 1.9x 4.5x -0.7x
Debt / FCF 2.6x 10.4x 49.4x
Liabilities / assets 51.6% 80.1% 91.9%
Equity / assets 48.4% 19.9% 8.1%
Interest coverage 6.4x 1.5x 3.1x
Current ratio 1.6x 1.2x 1.0x
Quick ratio 2.0x 1.1x 1.0x
Cash ratio 0.2x 0.2x 0.5x
Altman Z-score 4.05 1.15 0.82

Shareholder Returns

7 metrics
MetricACIWFOURWEX
Dividend yield – – –
Net buyback yield 3.0% 10.7% 1.0%
Shareholder yield 3.0% 10.7% 1.0%
Payout ratio (earnings) – – –
Payout ratio (FCF) – – –
Dividend growth (1Y) – – –
Dividend CAGR (3Y) – – –

Analyst Estimates

Solid lines are reported fiscal-year results; dashed lines are the consensus for the years ahead. Hover a year for the analysts' high and low, and how each result compared with its estimate.

ConsensusACIWFOURWEX
Forward P/E 19.7xFY2026 6.9xFY2026 8.7xFY2026
EPS, next fiscal year $2.77FY2026 $5.50FY2026 $21.31FY2026
EPS growth, next FY +28.2%FY2026 +6.4%FY2026 +32.4%FY2026
EPS growth, the year after +12.6% +8.7% -6.7%
Revenue, next fiscal year $1.81BFY2026 $2.44BFY2026 $2.97BFY2026
Revenue growth, next FY +3.0%FY2026 +23.2%FY2026 +11.5%FY2026
Revenue growth, the year after +20.2% +6.6% -3.1%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersACIWFOURWEX
Held by institutions 100.0% 87.4% 100.0%
Institutions holding 378 358 417
Change in shares held, QoQ +3.5% -2.3% +2.5%
Institutions buying 198 187 189
Institutions selling 130 142 166
Buyers to sellers 1.52 1.32 1.14

Return Correlation

Daily returns, last 12 months

1.00 means two stocks move in lockstep, 0 that they move independently. Pairs below about 0.5 diversify each other.

ACIWFOURWEX
ACIW 1.00 0.45 0.42
FOUR 0.45 1.00 0.42
WEX 0.42 0.42 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, ACIW, FOUR and WEX?

Wex (WEX) is the largest by market capitalisation: Aci Worldwide (ACIW) $5.56B, Shift4 Payments (FOUR) $3.01B, Wex (WEX) $6.62B.

Which stock is cheaper, ACIW, FOUR and WEX?

Wex (WEX) trades on the lowest price-to-earnings ratio (Aci Worldwide (ACIW) 24.6x, Shift4 Payments (FOUR) 68.7x, Wex (WEX) 18.9x). On next year's consensus earnings, Shift4 Payments (FOUR) is cheapest (Aci Worldwide (ACIW) 19.7x, Shift4 Payments (FOUR) 6.9x, Wex (WEX) 8.7x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

Shift4 Payments (FOUR) grew revenue fastest over the trailing twelve months: Aci Worldwide (ACIW) +7.0%, Shift4 Payments (FOUR) +32.4%, Wex (WEX) +7.5%.

Which company is more profitable?

Wex (WEX) has the highest net margin (Aci Worldwide (ACIW) 12.4%, Shift4 Payments (FOUR) 0.9%, Wex (WEX) 12.6%). On return on invested capital, Aci Worldwide (ACIW) leads (Aci Worldwide (ACIW) 10.8%, Shift4 Payments (FOUR) 4.9%, Wex (WEX) 7.8%).

Which stock has performed better?

Over the past year Wex (WEX) returned the most: Aci Worldwide (ACIW) +8.9%, Shift4 Payments (FOUR) -50.8%, Wex (WEX) +15.7%. Over five years, Aci Worldwide (ACIW) compounded fastest (Aci Worldwide (ACIW) +12.0%/yr, Shift4 Payments (FOUR) -10.1%/yr, Wex (WEX) +3.0%/yr). Returns are price only, before dividends.

Which stock is riskier?

By one-year price volatility, Aci Worldwide (ACIW) has been the steadiest (Aci Worldwide (ACIW) 34.9%, Shift4 Payments (FOUR) 66.2%, Wex (WEX) 41.7%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, ACIW, FOUR and WEX?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Wex (WEX) leads on 5. Business Quant does not give investment advice; use the comparison as a starting point for your own research.

Data from SEC filings, exchange prices and consensus estimates, via Business Quant. Percentile scores compare each company with its own peer group, so two companies' scores are each relative to different peers unless you rank against the whole market. Price returns exclude dividends. Nothing on this page is investment advice.