Mercury closed a $200 million Series D at a $5.2 billion valuation on May 20, 2026 — up 49% from its valuation just 14 months earlier — and the timing is as instructive as the cheque. The startup-banking fintech announced the round on the same news cycle that confirmed conditional approval from the Office of the Comptroller of the Currency (OCC) to establish Mercury Bank, N.A., putting it among the first fintechs to move toward a full national bank charter under a US regulatory environment that just got friendlier when President Donald Trump’s May 19 executive order pushed the OCC and four other federal financial regulators onto 90- and 180-day timelines for streamlining fintech-charter pathways. The combined signal — fresh capital plus a charter on track — is the cleanest case study yet of what the new EO is meant to enable.
The Series D was led by venture firm TCV — backer of Revolut and Nubank — with existing investors Sequoia Capital, Andreessen Horowitz and Coatue participating. Mercury reached $650 million in annualised revenue in Q3 2025 and reported a 2.5x increase in applications in Q1 2026 versus Q1 2025, with chief executive Immad Akhund framing the growth as a function of an underlying shift in startup formation:
“AI is collapsing the friction between an idea and a company faster than anything I have seen in my career.”
— Immad Akhund, co-founder and CEO, Mercury (Business Wire / Mercury)
The OCC conditional approval is the more consequential piece for B2B readers. Mercury Bank, N.A. would give the company direct access to capabilities its current partner-bank model cannot match — including Zelle integration, an expanded lending suite, and deeper payment infrastructure built and controlled in-house. A national bank charter is the regulatory perimeter most US fintechs have circled for a decade without crossing, and Mercury moving to the front of that queue at the same moment the federal financial regulators are under explicit White House direction to streamline charter pathways is the policy/operational alignment the sector has been waiting for. The structural backdrop for that alignment is documented in our coverage of how the Trump executive order ordered a Fed master-account review for fintechs.
The competitive read is mixed. TCV’s portfolio — Revolut and Nubank — points to where Mercury is being positioned: a US neobank-style franchise oriented at the SMB and startup segment, with the same kind of compounding revenue model that drove the international comparables. The $650 million ARR base is already material — for context, the Brazilian and European reference points were valued at multiples of similar revenue trajectories — and the 2.5x application-flow growth suggests the top of the funnel is still expanding. Compared with the broader European-neobank push covered when Bunq filed for its Mexican banking licence, Mercury is taking the opposite route into North America: building US charter first rather than expanding into adjacent markets through partner licensing. That choice now looks well-timed.
The peer field will read the move as a signal that the OCC charter pathway is open for any sufficiently scaled fintech with a clean regulatory record. Expect filings from at least one major incumbent fintech (Plaid, Wise, or a Stripe subsidiary) within the next two quarters. Compliance and risk teams across the sector should treat the EO timelines as binding for application processes, not aspirational. The same shifting incumbent map drives consolidation pressure — as the European-payments competitive context makes clear, including when Klarna landed inside Worldline’s European merchant network — and the US side is now mirroring those moves in charter form rather than M&A form.
What happens next. Three observable markers will resolve this story across the next two quarters. First, the OCC final charter approval for Mercury Bank, N.A. — conditional approval is not final, and the conditions can shape the operating model. Second, the next major fintech to file for a national bank charter using the same template — that filing would confirm the pathway is genuinely open. Third, the Federal Reserve master-account question on the back of the May 19 EO: a Mercury-affiliated bank entity would, in principle, be eligible to apply, but the Fed has 120 days to deliver its evaluation report and master-account access is the slower-moving track. Until those signals land, the $200 million Series D and OCC conditional approval together mark the clearest fintech-charter inflection of 2026.
This article is informational only and does not constitute legal, regulatory, or investment advice. Firms should consult qualified counsel and their relevant supervisory authority before taking any action based on the analysis above.
Rick Steves
Rick Steves has seen business and economics through many lenses. He joined the financial services industry in 2009, and has been a financial journalist since 2011. He holds a degree in Business Administration and has experience producing real-time news, from both buy-side and sell-side, as well as for retail traders, brokers and service providers. Steves' work has appeared in a variety of online publications including FX Street, NewsBTC, FinanceFeeds, and The Industry Spread. Rick has great interest in the dynamics of the trading industry. The never-ending clash between technology, economics, regulation, and more importantly, the people.
