Fiserv (FISV) down 11.49% year-to-date with adjusted EPS guidance of $8.00-$8.30 for 2026, below 2025โ€™s $8.64, after adjusted operating margin contracted to 34.9% from 42.9% and operating income fell 22.6% year-over-year to $1.291 billion. Shopify (SHOP) posted Q4 revenue of $3.672 billion, up 30.58% year-over-year, with B2B GMV surging 96% in 2025, Shop Pay GMV jumping 62%, and Shopify Payments now live in 60 countries.

Fiserv is betting its transformation costs yield AI-driven commerce gains by 2027, while Shopify is defending its durable momentum against concerns that AI disruption will fracture merchant operations.

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Two of the most important names in payments and commerce just reported earnings. One is rebuilding from the inside out. The other can't seem to slow down. What their leaders said reveals where each business stands right now.

Fiserv (NYSE:FISV) CEO Mike Lyons inherited a company mid-transformation, and his Q4 2025 earnings call made clear he's playing a long game.

The headline numbers were rough. Adjusted operating margin contracted from 42.9% to 34.9%, and operating income fell 22.6% year-over-year to $1.291 billion. A big chunk of that pain came from $73 million in One Fiserv transformation costs in Q4 alone.

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But Lyons wasn't defensive. He was direct:

"No other company has the assets, breadth and scale to connect all parts of the financial ecosystem. Our unique position at the center of Commerce and Finance, two massive TAMs strengthens the market position of both our merchant and financial solutions businesses."

That's the bull case in one sentence. The bear case is the 2026 guidance calling for adjusted EPS of $8.00 to $8.30, potentially below the $8.64 posted in 2025. The market noticed: FISV is down 11.49% year-to-date.

The most revealing Lyons quote came on agentic AI:

"We see agentic fundamentally changing the payments landscape and are working with Google, Mastercard and Visa to bring agentic to mainstream commerce."

Fiserv is planting a flag in the next wave of commerce infrastructure. Whether the transformation costs are worth it depends on whether that flag means anything by 2027. Lyons has an Investor Day on May 14, 2026 where he's promised a fuller update on Project Elevate, the AI operational overhaul. That's the next real test.

Shopify (NYSE:SHOP) President Harley Finkelstein had a different problem: explaining why AI won't break what's already working.

The numbers speak loudly. Q4 revenue hit $3.672 billion, up 30.58% year-over-year, extending 11 consecutive quarters of 25%-plus revenue growth. B2B GMV surged 96% in 2025 and Shop Pay GMV jumped 62%.

Finkelstein's most important quote wasn't about growth. It was about risk management:

"Our primary focus is on ensuring a seamless transition that supports our merchants without disrupting existing operations... allowing us to enhance functionality while maintaining the reliable services that our merchants expect."

Shopify's AI strategy is merchant-first, not technology-first. That's a meaningful distinction when every platform is racing to bolt on AI features that confuse more than they help.

CFO Jeff Hoffmeister added a concrete data point: Shopify Payments is now live in 60 countries, underpinning the 36% international revenue growth in 2025. The company also launched a $2 billion share repurchase program starting February 17, 2026, signaling confidence in sustained cash generation.

Two companies, two very different conversations. Fiserv is asking investors to trust a turnaround still in progress and absorbing real costs. Shopify is asking investors to trust that its momentum is durable, not fragile. Both are legitimate stories, but they require very different kinds of patience.

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