Shift4 Payments, Inc. FOUR

Key data

The business

Shift4 sells payment processing bolted directly into the software a merchant already runs: the SkyTab tablet on the restaurant table, the terminal at the stadium beer stand, the checkout on a hotel booking page. It takes a slice of every card swipe, and because the processing lives inside the point-of-sale software, ripping it out means changing how the whole business rings up a sale. That is the moat, a switching cost dressed as convenience, sold through the software vendors who bring the merchants. In 2025 it bought Global Blue and pushed into tax-free shopping, taking a commission on the VAT a tourist reclaims on a purchase, which the company books net, as an agent. The engine is volume times take rate: more merchants, more dollars flowing, a thin cut of each.

The numbers

The top line compounds and the bottom line does not, and the gap is the whole story.

Revenue rose 34% year over year in Q2, helped by a full quarter of Global Blue, and operating income more than held. Yet net income of $22M is lower than the $34M the company earned a year earlier on a third less revenue. The wedge is interest and the minority holders in the company's Up-C structure, who stand between the operating line and the shareholder.

Revenue tripled in four years, roughly 32% a year. Operating income went from a loss to $351M. Net income swung from a $48M loss in 2021 to $75M in 2022, climbed to $230M in 2024, then fell back to $119M in 2025 even as operating income jumped 42%. That is the debt taken on for Global Blue arriving on the income statement. What the reported profit hides is the cash: the business generated about $634M of operating cash flow in 2025 and roughly $624M of free cash, so it trades near seven times the cash it actually produces while reading over 35 times reported earnings. The variant here is simple. The market is pricing the income statement; the cash statement says the earning power is two to three times larger, and the difference is non-cash acquisition amortization plus interest that pays down over time. The leverage that a year ago was the only thing that could force the founder's hand is still exactly there, net debt at 4.6 times EBITDA, while the organic growth print stayed buried under the acquisition.

Management

The founder is buying with both hands. Jared Isaacman, who remains the largest shareholder, bought about $23M of stock across three purchases this year, the bulk of $33.6M in total insider buying against a trivial $1.7M sold, plan status not disclosed on those sales. That is the loudest thing in the file. The company also bought back $453M of stock in 2025 and another $295M in the first quarter of 2026, aggressive repurchasing while carrying 4.6 times leverage, which is either conviction or borrowing to shrink the count, depending on where organic growth actually is. The pay and the buyback both point the same way as the insider buying, toward a management that thinks the stock is worth more than $46.

How it fails or surprises you

The GAAP mirage widens. Operating income climbed to $351M in 2025 while net income fell to $119M, the single fact the cash-machine read explains least well. If EBITDA does not outgrow the interest and minority drain, the shareholder keeps watching cash that never becomes reported profit. The print that proves it: net income stuck under $150M while operating income pushes past $400M.

Organic growth is quietly single-digit. The 34% top line is inflated by Global Blue; the company does not break out clean organic volume. If the underlying business is growing below the mid-teens, then eight times earnings is fair, not cheap, and the multiple has no spring in it. The print: a same-store volume number that decelerates toward low double digits.

The re-rate (right tail). At about seven times free cash flow, with the founder buying $23M and $624M of annual cash coming in, a move of leverage under four times alongside a clean mid-teens organic print would pull the multiple toward the low-20s its peers carry, worth well over double from here. The print: net debt below four times EBITDA with double-digit organic growth in the same quarter.

Closing thoughts

The shape here is a cash machine wearing a thin income statement. At $46 the stock throws off roughly $624M of free cash a year against a $4.2B market value, under seven times, while its reported profit reads over 35 times because interest and minority holders sit between the operating line and the shareholder. Which world you are in turns on the one number the company will not cleanly break out: organic growth. If it is still mid-teens, the debt pays down, the wedge narrows, and a re-rating toward the peer multiple is worth more than double. If organic has slipped to single digits while a travel slowdown hits Global Blue, then 4.6 times leverage and 1.5 times interest cover on reported earnings is thin cover, and the founder's buying will not rescue a bad quarter. The fatter tail is up, because the price already assumes the bad case, but the left tail is real and you avoid it only by watching the leverage.

The bet is still that Shift4 keeps wiring up the places you tap your card and turns the cash into debt paydown faster than the market believes. It breaks if net income keeps falling while operating income climbs, the sign the debt is winning, and the one pair to watch is net debt to EBITDA against organic volume growth, quarter by quarter. Below four times with double-digit organic, the doubters were wrong. Above 4.5 times with organic in single digits, they were early, not wrong.