FISV vs FOUR: How Fiserv and Shift4 Payments Compare (2026)

Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

Reading it: FISV is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. FISV and FOUR share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined FISV and FOUR exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

Fiserv is one of the largest payments and financial-technology companies in the world. It operates broadly in two areas: merchant solutions, where it processes card and digital payments for millions of businesses and runs the Clover point-of-sale and small-business platform, and financial solutions, where it provides core account processing, card issuing, digital banking, and related technology to banks and credit unions. Most of its revenue is recurring and transaction-based, tied to the volume of payments and accounts it processes, which gives the business a steady, infrastructure-like quality. Fiserv changed its listing to the Nasdaq and reinstated its original ticker symbol FISV (from FI) in November 2025.

Full FISV guide

Shift4 Payments, Inc. (NYSE: FOUR) provides end-to-end payment processing and commerce technology for what it calls the experience economy. Its stack combines merchant acquiring, a payments gateway, and proprietary software, most visibly the SkyTab point-of-sale system, serving restaurants, hotels and resorts, casinos, stadiums and arenas, theme parks, nonprofits, and specialty retail. The company processed roughly $56 billion of volume in the first quarter of 2026 at a blended spread near 61 basis points. Its 2025 acquisition of Global Blue, a roughly $2.5 billion deal, added tax-free shopping and VAT refund processing for international luxury shoppers plus dynamic currency conversion, and those pieces now anchor the Shift4 One platform that bundles payments, currency conversion, and tax-free shopping for cross-border retail in Europe.

Full FOUR guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• FISV drivers: Recurring, transaction-based revenue; Clover platform growth.
• FOUR drivers: International expansion and Shift4 One; Global Blue and tax-free shopping.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: The main risk is that Fiserv's growth is modest, so slowing organic revenue growth, margin pressure, or weaker free cash flow can disappoint investors, as the 2026 share weakness showed. For FOUR, leverage is the first-order risk: roughly $4.58 billion of debt against ~$473 million of cash means debt accounts for more than half of enterprise value, which magnifies both the equity upside and the downside if growth stalls.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick FISV if you believe its drivers more; FOUR if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the FISV and FOUR guides.

FISV. Figures are approximate and tied to the asOf date; verify live numbers before acting. Fiserv is a profitable, cash-generative company, so an earnings multiple is meaningful, and the 2026 share weakness left some valuation metrics looking discounted versus its history. But the market's concern is the pace of organic growth, margins, and free-cash-flow recovery, so investors should weigh those trends and execution on internal initiatives rather than the multiple alone.

FOUR. The valuation reads two very different ways depending on which earnings number is used: trailing GAAP P/E near 61x reflects net income of only ~$62 million after acquisition amortization and interest, while the forward multiple near 9.5x reflects adjusted EPS guidance of ~$5.50 to ~$5.70. Enterprise value of roughly $8.4 billion against ~$858 million of adjusted EBITDA puts the business near 9.8x EV/EBITDA, a level more typical of a mature processor than a company guiding to 26% to 31% growth. Shares traded around $54 in early August 2026 against a 52-week range of roughly $34.56 to $103.30, and second-quarter results were scheduled for August 6, 2026.

Headline figures (approximate, Jul 2026): FISV shows revenue (q1 2026) ~$5.03 billion, down about 2% year over year, adjusted eps (q1 2026) ~$1.79, beating expectations though down year over year, gaap eps (q1 2026) ~$1.07, 2026 guidance organic revenue growth ~1% to 3%; adjusted EPS ~$8.00 to $8.30 (reaffirmed); FOUR shows revenue (ttm) ~$4.45B (+28% YoY), q1 2026 gross revenue less network fees ~$549M (+49% YoY), adjusted ebitda (ttm) ~$858M, market cap / enterprise value ~$4.3B / ~$8.4B.

FISV and FOUR are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined FISV and FOUR exposure against your real portfolio. It is not an investment adviser.