Japan's megabanks are coming to buy Wall Street. Sumitomo Mitsui Financial Group (SMFG) is preparing for a possible full acquisition of US investment bank Jefferies, according to the Financial Times. If it happens, it would be one of the biggest cross-border deals a Japanese financial institution has attempted in decades.

The FT Report: A Takeover Task Force in Tokyo

On March 24, 2026, the Financial Times dropped a bombshell: SMFG, Japan's second-largest bank by assets, has assembled a small internal team to prepare for a possible full acquisition of Jefferies Financial Group, the New York-based investment bank in which SMFG already holds a 20% economic stake.

The timing isn't coincidental. Jefferies' stock has plummeted more than 36% in 2026 alone, leaving its market capitalization at roughly $8.2 billion. Compare that to SMFG's approximately $124 billion valuation, and the financial math for a full buyout becomes entirely feasible.

However, the FT also noted that no deal is imminent. Whether Jefferies' leadership would agree to sell at such depressed valuations remains uncertain. SMFG appears to be in "watch and prepare" mode, ready to strike if the price is right, but not rushing into anything.

Indeed, Bloomberg reported the same day that SMFG has no immediate plans for an acquisition, citing regulatory hurdles and other obstacles. SMFG's official statement was carefully diplomatic: "Jefferies is our important partner. We decline to comment on hypothetical assumptions or rumors."

Five Years of Building the Relationship

This is not a bolt from the blue. SMFG and Jefferies have been building the relationship since 2021:

  • 2021: Sumitomo Mitsui Banking Corporation (SMBC) invests roughly ¥40 billion for an initial stake of about 5%, starting with cross-border M&A advisory
  • 2023: The alliance widens to M&A and equity and debt capital markets, focused on US investment-grade clients
  • Subsequent memorandums: coverage extended to EMEA, Canada, Asia, and Australia
  • September 2025: roughly ¥135 billion (about $910 million) of additional investment raises the economic stake from 14.5% to up to 20%. A joint venture, "SMBC Nikko Jefferies Securities," is announced for Japanese equity operations, set to launch January 2027, alongside about $2.5 billion in credit facilities extended to Jefferies

SMFG also has a representative on Jefferies' board. This is no longer a passive investment; it is an increasingly integrated partnership.

Why Now?

Jefferies' stock decline stems from specific troubles. Its Leucadia Asset Management division had roughly $715 million in exposure to First Brands Group, the US auto-parts manufacturer that collapsed in September 2025 amid fraud allegations. In February 2026, the London-based non-bank lender Market Financial Solutions (MFS) also collapsed. Fraud, including double-pledged receivables, surfaced at both after the fact, and investors turned their attention to Jefferies' lending standards and risk appetite. The firm is also in a legal dispute with Western Alliance, and investors have filed suits alleging Jefferies misled them about fund investments tied to First Brands.

For SMFG, this distress could represent a buying opportunity, a chance to acquire a respected Wall Street brand at a significant discount. But it also means inheriting legal risks and potential reputational concerns that require careful evaluation.

SMFG's motivations run deeper than opportunism. Japan's banking sector faces structural headwinds: although the Bank of Japan ended its negative interest rate policy in March 2024, rates remain low by global standards, and Japan's shrinking population means the domestic market offers limited growth. Overseas expansion isn't just a growth strategy, it's a survival imperative.

Investment banking has been a particular weak spot for SMFG. While rival Mitsubishi UFJ Financial Group (MUFG) has dominated this space through its longstanding alliance with Morgan Stanley, SMFG has long been playing catch-up. The company has set an ambitious target of doubling overseas securities operating profit to approximately $330 million by the fiscal year ending March 2026.

How Japan's Big Three Compare

Each of Japan's three megabank groups has pursued a distinct approach to global expansion, creating what industry observers call a "three-kingdoms" dynamic:

MUFG × Morgan Stanley (2008–present): The Pioneer MUFG invested roughly $9 billion in Morgan Stanley during the chaos of the 2008 financial crisis, securing approximately 24% of the US bank's shares. Over 17 years, this alliance has become the gold standard for Japanese-American financial partnerships, with MUFG Morgan Stanley Securities consistently ranking at the top of Japan-related M&A advisory league tables. In December 2025, MUFG announced plans to deepen cooperation in asset management and Asian markets. The main limitation: MUFG's influence over Morgan Stanley's management remains constrained by its minority position.

Mizuho × Greenhill (2023): The Targeted Approach Mizuho Financial Group acquired boutique advisory firm Greenhill & Co. in 2023, boosting its M&A advisory capabilities. While smaller in scale compared to the MUFG and SMFG strategies, this targeted acquisition gave Mizuho a foothold in the competitive US advisory market.

Nomura × Lehman Brothers (2008): The Cautionary Tale Nomura Holdings' roughly $200 million acquisition of Lehman Brothers' European and Asian operations in 2008 remains the most-cited example of what can go wrong when Japanese firms buy into Wall Street. Cultural clashes, talent exodus, and integration difficulties led to years of losses. It took Nomura over a decade to stabilize its overseas business, a painful reminder that buying a Wall Street firm is the easy part; making it work is the real challenge.

SMFG's Jefferies play falls somewhere between MUFG's cautious alliance model and Nomura's full-integration approach. The question is whether SMFG can avoid the pitfalls that plagued Nomura while achieving a deeper level of integration than MUFG has with Morgan Stanley.

Three Hurdles

Several significant obstacles stand between SMFG and a completed deal:

Regulatory scrutiny: A full acquisition of a US financial institution by a foreign entity requires approval from the Federal Reserve, the SEC, and potentially other regulators. SMFG has carefully kept its voting rights below 5% so far, a full takeover would trigger an entirely different level of regulatory review, particularly given current US political sensitivities around foreign ownership of financial institutions.

Cultural collision risk: Japanese banking culture, characterized by consensus-driven decision-making, seniority-based hierarchies, and long-term relationship focus, differs dramatically from Wall Street's performance-driven, high-compensation environment. The Nomura-Lehman experience showed how this gap can derail even well-intentioned acquisitions. Top Jefferies producers might head for the exits if they feared a cultural shift.

The seller's willingness: this may be the biggest wall. Jefferies management holds roughly 20% of the company. CEO Rich Handler, President Brian Friedman, and Chair Joe Steinberg each hold substantial stakes, and none of them has much reason to sell at a price down almost 40% from the start of the year. A buyer with money is not a transaction if nobody is selling.

What Happened Next: Earnings Missed

The quarterly results this article said were coming landed on March 25.

They were mixed. Revenue came in at $2.02 billion, up 27% year on year and in line with expectations. Net income attributable to common shareholders rose to $155.7 million from $127.8 million a year earlier. Investment banking and equities trading both posted record revenues.

But adjusted earnings per share came to $0.70, against a consensus of $0.95. A $36 million after-tax goodwill impairment tied to the Tessellis sale, plus $17 million of losses from MFS and First Brands, did the damage. UBS kept its buy rating, citing the record investment banking and equities revenue, while acknowledging that one-off costs and a high compensation ratio hit EPS.

SMFG has not stood still either. A May regulatory filing showed Sumitomo Mitsui Banking Corporation had acquired $310 million of Jefferies stock. No takeover talks, but the position keeps deepening quietly.

From Cautious Lenders to Global Players

Zooming out, this story is part of a larger transformation of Japan's financial sector. In fiscal 2024, MUFG reported approximately $10 billion in net profit while SMFG recorded roughly $6.5 billion, both at or near all-time highs. Armed with enormous capital reserves, Japanese megabanks are globalizing at an unprecedented pace.

Industry analysts have called this the "Third Wave" of Japanese investment in US finance. The first wave came during the 1980s bubble era (ending largely in expensive failures). The second came in 2008-2010 (with mixed results from MUFG-Morgan Stanley and Nomura-Lehman). This third wave is being described as more strategic, more patient, and informed by past lessons.

Yet as Bloomberg's opinion columnists have pointed out, the track record of Japanese firms acquiring US investment banks remains decidedly mixed. Whatever form SMFG's relationship with Jefferies ultimately takes, it will serve as a crucial test of whether Japanese capital and Wall Street deal-making culture can successfully merge.

Japanese megabanks are clearly entering a new chapter in their global expansion. In your country, have foreign banks ever acquired major domestic financial institutions? How did the public react? We'd love to hear your perspective!

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