This week’s U.S. fintech tape didn’t just wake up — it stretched, caffeinated, and reminded everyone that American deal flow isn’t dead, it’s just selective. The biggest checks clustered around infrastructure, AI‑native platforms, industrial automation, and mission‑critical systems that keep the economy from wobbling. No gimmicks, no consumer‑app cosplay — just real companies solving real problems with real revenue potential. Below are the five largest U.S. rounds of the week, each pointing to where domestic fintech is actually heading while the rest of the world sprints ahead.
1. MiRus — $1.5B
Location: Marietta, Georgia
Round: Corporate minority investment (34% stake) by Boston Scientific
What they do: MiRus builds next‑generation structural heart, spinal, and orthopedic implant technologies using proprietary alloys and advanced monitoring systems. Not fintech in the traditional sense — but absolutely in the “capital flows to mission‑critical infrastructure” sense. When investors write billion‑dollar checks, they’re voting for systems that keep people alive and economies stable.
2. Modal — $355M
Location: New York City
Round: Series C, led by General Catalyst and Redpoint
What they do: Modal is an AI‑native cloud compute and serverless container platform built for workloads the legacy cloud chokes on — low‑latency inference, massive RL training loops, and billions of isolated sandboxes. It’s the infrastructure layer for the AI era, scaling like it has somewhere to be.
3. Amca — $300M
Location: El Segundo, California
Round: Series B, led by Caffeinated Capital
What they do: Amca is rebuilding America’s aerospace and defense supply chain from the studs up — integrating engineering, qualification, testing, and certified manufacturing into one vertically connected platform. Their AI‑powered RAPID system cuts design‑to‑production timelines by more than two‑thirds. Industrial fintech at its finest: capital backing the systems that keep the country running.
4. Mercury — $200M
Location: San Francisco
Round: Series D, led by TCV
What they do: Mercury provides banking infrastructure for startups and the new wave of AI‑accelerated entrepreneurship. With 300,000+ customers, $650M in annualized revenue, and four straight years of profitability, Mercury is becoming the default operating account for founders who want banking that actually helps them run a business — not just store money in a vault.
5. Radar — $170M
Location: New York City
Round: Series B, co‑led by Gideon Strategic Partners and Nimble Partners
What they do: Radar delivers real‑time, 99%‑accurate inventory intelligence to physical retail using ceiling‑mounted RFID sensors and AI analytics. It’s the data layer brick‑and‑mortar has been pretending it had for a decade — reducing shrink, eliminating out‑of‑stocks, and finally giving retailers the omnichannel visibility they’ve been promising shareholders since 2014.
DWN Executive Brief: What These Deals Signal About the U.S. Fintech Cycle
Zoom out, and the pattern is loud enough to hear from the parking lot: U.S. fintech capital is migrating up‑stack. Investors are done funding front‑end toys and are instead pouring money into the machinery — AI compute (Modal), banking infrastructure (Mercury), industrial automation (Amca), real‑time physical‑world intelligence (Radar), and even mission‑critical medical systems (MiRus). It’s fintech in the broadest, most literal sense: the financing of the systems that make the economy function.
Across all five deals, the through‑line is unmistakable: investors want durability, defensibility, and operational leverage. They’re backing platforms that scale, monetize, and survive regulatory weather without needing a Super Bowl ad to stay alive. The U.S. may not be leading the global funding parade this month, but the deals that are getting done point to a cycle built on infrastructure, automation, and AI‑accelerated productivity — not consumer flash.
In short: the next U.S. fintech wave isn’t about who builds the prettiest interface. It’s about who builds the backbone everyone else will depend on.
Content provided by DWN’s team with the assistance of Copilot
