Back to the trend of the day: Switzerland's biggest bank, UBS, is weighing a move of its headquarters abroad (in German)

Poly Rating · from the trend of the day

Too Big to Fail Banks List 2026: Bank Size vs Home GDP

UBS's $1.71 trillion balance sheet is about one and a half times Switzerland's yearly economic output, while JPMorgan Chase, at $5 trillion, equals only about 15% of US GDP.

No. 1: UBS
10 places
Current as of October 18, 2026, 03:07 EDT

01Final list

The leading AIs each built their own list of ten independently. Here is one result that is easy to check: every place has a reason, a source, and the list of AIs that included it.

Order: from most to least AI agreement.

A bright badge means this AI put the entry on its list. A dim badge means it did not.

1
UBS
$1.71tn of assets is about 149% of Swiss GDP on IMF 2026 data and 164% on World Bank 2025 data. That is bigger than the whole economy of the AAA-rated state behind it.
Included it: Claude, ChatGPT, Grok, Gemini, MiMo, Kimi, DeepSeek.
In their lists: Claude: 1 · ChatGPT: 1 · Grok: 1 · Gemini: 1 · MiMo: 1 · Kimi: 1 · DeepSeek: 1
What each AI noted 7
- Claudeplace 1
  UBS's $1.71 trillion balance sheet is about 1.5 times Switzerland's GDP, so the bank is bigger than the economy that would have to rescue it.
  Source ↗
- ChatGPTplace 1
  A $1.707 trillion bank faces a potential headquarters dispute over roughly $16 billion to $20 billion of additional capital.
  Source ↗
- Grokplace 1
  Assets equal 167% of Swiss GDP with vast global wealth and foreign booking books that dwarf the home economy.
  Source ↗
- Geminiplace 1
  A single bank whose $1.65 trillion balance sheet dwarfs Switzerland's entire annual GDP by nearly 180%, prompting contingency plans to relocate its headquarters abroad.
  Source ↗
- MiMoplace 1
  About 1.5 times Swiss GDP on its own balance sheet — and since 15 October 2026 it is reported to be weighing a headquarters move away from the country that would have to rescue it.
  Source ↗
- Kimiplace 1
  Its $1.69tn balance sheet is ~162% of Switzerland's entire GDP — and the bank is now openly weighing leaving the country rather than accept the capital law meant to make it safer.
  Source ↗
- DeepSeekplace 1
  A $1.7tn balance sheet equal to about 164% of Swiss GDP — the only bank here whose home economy is smaller than the bank by a wide margin.
  Source ↗
7 AIs put it here
Source ↗
2
Banco Santander
€1.95tn of assets roughly equals or exceeds Spain's whole economy (about 107–120%, depending on GDP year and exchange rate). Most income is earned abroad: 71% or 81%, depending on the source.
Included it: Claude, ChatGPT, Grok, Gemini, MiMo, Kimi, DeepSeek.
In their lists: Claude: 2 · ChatGPT: 4 · Grok: 10 · Gemini: 4 · MiMo: 2 · Kimi: 2 · DeepSeek: 3
What each AI noted 7
- Claudeplace 2
  Santander's €1.95 trillion of assets is roughly the size of Spain's whole economy, and most of its business sits in other countries.
  Source ↗
- ChatGPTplace 4
  Santander's €1.954 trillion in assets and 182 million customers span nine core markets, making any exclusively Spanish rescue assumption unrealistic.
  Source ↗
- Grokplace 10
  Pan-European and Latin American footprint makes its Spanish home relatively small by comparison.
  Source ↗
- Geminiplace 4
  Its €1.80 trillion balance sheet exceeds 115% of Spain's entire national output, with over three quarters of its business distributed across the UK, US, and the Americas.
  Source ↗
- MiMoplace 2
  Around 71% of its income is earned outside Spain — but it is a Spanish balance sheet Madrid would be rescuing.
  Source ↗
- Kimiplace 2
  Roughly €1.95tn of assets against a $1.9tn Spanish economy — a bank whose profits are made mostly in Brazil and Mexico but whose rescue would be Madrid's problem.
  Source ↗
- DeepSeekplace 3
  Assets are about 120% of Spanish GDP while roughly 81% of revenue is earned outside Spain — the home country is mainly a headquarters, not a balance sheet.
  Source ↗
7 AIs put it here
Source ↗
3
HSBC
$3.44tn equals about 81–86% of UK GDP, yet only about a fifth of revenue comes from Britain (one source). It is also in the highest FSB bucket on this list (3).
Included it: Claude, ChatGPT, Grok, Gemini, MiMo, Kimi, DeepSeek.
In their lists: Claude: 5 · ChatGPT: 3 · Grok: 4 · Gemini: 3 · MiMo: 4 · Kimi: 7 · DeepSeek: 2
What each AI noted 7
- Claudeplace 5
  HSBC's $3.44 trillion is about 81% of UK GDP, and its Hong Kong operations are a core business.
  Source ↗
- ChatGPTplace 3
  HSBC's approximately $3.4 trillion balance sheet sits under a British holding company even though the group's business is spread across major international markets.
  Source ↗
- Grokplace 4
  Asia-focused giant whose balance sheet is ~80% of UK GDP yet relies on a stronger home backstop.
  Source ↗
- Geminiplace 3
  Anchored legally in London but earning over 75% of its profits in Asia, creating a $3.0 trillion liability for a UK state already carrying 100% debt-to-GDP.
  Source ↗
- MiMoplace 4
  Nearly USD 3 trillion of exposure guaranteed from London while the profit engine keeps running on Asia.
  Source ↗
- Kimiplace 7
  Bucket 3 and a balance sheet ~75% of UK GDP, yet the home state matters least here: the group just completed the privatisation of Hang Seng Bank and its money is made in Asia.
  Source ↗
- DeepSeekplace 2
  Assets equal about 86% of UK GDP, but only one-fifth of revenue comes from the UK — a British headquarters with an Asian balance sheet.
  Source ↗
7 AIs put it here
Source ↗
4
BNP Paribas
Its €3.08tn balance sheet is about the size of French GDP, and the state that would rescue it already owes about 118–120% of GDP. Rating agencies split between Aa3, A+ and AA-.
Included it: Claude, ChatGPT, Grok, Gemini, Kimi, DeepSeek. Did not include: MiMo.
In their lists: Claude: 3 · ChatGPT: 5 · Grok: 2 · Gemini: 2 · Kimi: 3 · DeepSeek: 4
What each AI noted 6
- Claudeplace 3
  At €3.08 trillion, BNP Paribas is about as large as France's annual output, and France carries government debt of roughly 118–120% of GDP.
  Source ↗
- ChatGPTplace 5
  A 4.4% leverage ratio puts a different perspective on the resilience of one of Europe's major cross-border banking groups.
  Source ↗
- Grokplace 2
  Nearly as large as the entire French economy while holding most credit exposures outside France.
  Source ↗
- Geminiplace 2
  Carries assets equivalent to roughly 90% of French GDP at a time when France's national debt exceeds 112% of GDP and faces sovereign rating downgrades.
- Kimiplace 3
  Europe's largest bank by assets runs a balance sheet of roughly €2.9tn — about 95% of French GDP — and sits in G-SIB bucket 2 alongside UBS.
  Source ↗
- DeepSeekplace 4
  Assets roughly match French GDP, and France's public debt is 118% of GDP — a bank the size of the state's economy with a state already borrowing heavily.
  Source ↗
6 AIs put it here
Source ↗
5
ING Group
€1.17tn of assets is roughly 85–95% of the Dutch economy (an estimate that moves with the exchange rate), and the balance sheet grew €23bn in a single quarter.
Included it: Claude, ChatGPT, Grok, Gemini, MiMo, Kimi. Did not include: DeepSeek.
In their lists: Claude: 7 · ChatGPT: 2 · Grok: 9 · Gemini: 5 · MiMo: see list · Kimi: 5
What each AI noted 6
- Claudeplace 7
  The Netherlands has a GDP of about $1.41 trillion, so a bank that is a large share of it sits close to the limit of what the state can cover.
  Source ↗
- ChatGPTplace 2
  ING reported €1.166 trillion in assets while its risk-weighted capital ratio was just 13.1%, making geographic scale more striking than the headline cushion.
  Source ↗
- Grokplace 9
  Large relative to the smaller Dutch economy with substantial cross-border retail and wholesale business.
  Source ↗
- Geminiplace 5
  A retail and wholesale giant whose €1.02 trillion asset base nearly matches the entire €1.08 trillion gross domestic product of the Netherlands.
- MiMo
  Named differently in its own list: open the full list.
  see list
- Kimiplace 5
  ING is still ~86% of Dutch GDP 17 years after the state injected €10bn and split it in two — a reminder that 'rescued once' is not the same as 'rescueable'.
  Source ↗
6 AIs put it here
Source ↗
6
Crédit Agricole
About €2.3–2.4tn, roughly 70–77% of French GDP (estimate; sources give different asset totals), backed by the same rescuer as BNP, a state owing about 118% of GDP.
Included it: Claude, ChatGPT, Grok, Gemini, Kimi. Did not include: MiMo, DeepSeek.
In their lists: Claude: 6 · ChatGPT: 8 · Grok: 3 · Gemini: 7 · Kimi: 6
What each AI noted 5
- Claudeplace 6
  Its group CET1 ratio of 17.2% is among the highest in this list, which makes the French state's burden smaller than the bucket suggests.
  Source ↗
- ChatGPTplace 8
  Its 17.2% CET1 ratio is unusually strong, but the correct systemically important perimeter is the whole mutual group, not merely its listed subsidiary.
  Source ↗
- Grokplace 3
  Second French G-SIB with assets rivaling national GDP and substantial cross-border activity.
  Source ↗
- Geminiplace 7
  Its €2.5 trillion asset base is 85% of France's GDP, combining mutual domestic networks with Europe's largest asset manager, Amundi.
  Source ↗
- Kimiplace 6
  France's second bucket-2 bank: €2.37tn of assets, ~77% of GDP, and a rescue of Crédit Lyonnais (1994) that cost the French state more than the bank's entire market value today.
  Source ↗
5 AIs put it here
Source ↗
7
Barclays
£1.73tn ($2.29tn), about 54–58% of UK GDP, is a second large claim on the same state that already stands behind HSBC, a state with debt above 100% of GDP.
Included it: Claude, ChatGPT, Grok, Gemini, DeepSeek. Did not include: MiMo, Kimi.
In their lists: Claude: 9 · ChatGPT: 6 · Grok: 5 · Gemini: 6 · DeepSeek: 5
What each AI noted 5
- Claudeplace 9
  Barclays holds about £1.73 trillion ($2.29 trillion), roughly 54% of UK GDP, with a large investment bank at its centre.
  Source ↗
- ChatGPTplace 6
  Barclays shares Britain's systemic banking responsibility with HSBC, but its G-SIB surcharge is one bucket lower.
- Grokplace 5
  UK G-SIB with assets over half of home GDP and significant international markets activity.
  Source ↗
- Geminiplace 6
  Balances a massive transatlantic Wall Street investment bank against a domestic UK lender, with assets reaching nearly 50% of the home country's GDP.
  Source ↗
- DeepSeekplace 5
  Assets are about 58% of UK GDP and almost half of revenue is foreign — large enough to strain the UK, but not as outsized as HSBC.
  Source ↗
5 AIs put it here
Source ↗
8
Standard Chartered
At $993bn it is only about 23–25% of UK GDP, but about 92% of revenue is earned outside Britain (one source). The UK backs a bank whose business is almost entirely abroad.
Included it: Claude, ChatGPT, Grok, Kimi, DeepSeek. Did not include: Gemini, MiMo.
In their lists: Claude: 10 · ChatGPT: 7 · Grok: 8 · Kimi: 10 · DeepSeek: 6
What each AI noted 5
- Claudeplace 10
  It has the smallest balance sheet here at $993bn, about 23% of UK GDP, and almost all of its business is outside the UK.
  Source ↗
- ChatGPTplace 7
  A London-headquartered G-SIB operates across 55 markets, making supervisory geography particularly important.
  Source ↗
- Grokplace 8
  Emerging-markets specialist whose foreign footprint far outweighs its UK home base.
  Source ↗
- Kimiplace 10
  Only ~23% of UK GDP — but over 90% of its business is in Asia, Africa and the Middle East, so the honest answer is that no home government is really its rescuer.
  Source ↗
- DeepSeekplace 6
  Only about 25% of UK GDP, but 92% of revenue is earned outside the UK — a small home balance sheet with a very foreign risk map.
5 AIs put it here
Source ↗
9
Mitsubishi UFJ Financial Group (MUFG)
About 62% of Japan's GDP, smaller than the European banks above it, but its home state carries the heaviest debt here: 204% of GDP in one IMF reading, about 245% in another.
Included it: Claude, Gemini, MiMo, DeepSeek. Did not include: ChatGPT, Grok, Kimi.
In their lists: Claude: 8 · Gemini: 9 · MiMo: 7 · DeepSeek: 8
What each AI noted 4
- Claudeplace 8
  Japan's government debt is about 204% of GDP, the weakest rescue position among the home countries here, though MUFG is small against Japan's $4.46 trillion economy.
  Source ↗
- Geminiplace 9
  A $2.7 trillion Japanese financial conglomerate resting on a sovereign whose national debt exceeds 250% of GDP.
  Source ↗
- MiMoplace 7
  Half of Japan's yearly output sits on MUFG's books — while the state behind it owes roughly two-and-a-half times that output.
  Source ↗
- DeepSeekplace 8
  Assets are about 62% of Japanese GDP, and Japan's public debt is 204% of GDP — a large bank in a state with very little headline fiscal room.
4 AIs put it here
Source ↗
10
Société Générale
€1.67tn is only about half of French GDP, but it relies on the same rescuer as BNP and Crédit Agricole. Together the three banks hold assets of over twice French GDP (estimate).
Included it: Claude, Grok, Gemini. Did not include: ChatGPT, MiMo, Kimi, DeepSeek.
In their lists: Claude: 4 · Grok: 6 · Gemini: 8
What each AI noted 3
- Claudeplace 4
  Its €1.67 trillion balance sheet is only about half of France's GDP, but it shares the same heavily indebted rescuer as BNP and Crédit Agricole.
  Source ↗
- Grokplace 6
  Highly international French G-SIB whose foreign credit share exceeds domestic.
  Source ↗
- Geminiplace 8
  Carries €1.50 trillion in assets under French jurisdiction, representing over 50% of national GDP while undergoing aggressive overseas divestments.
3 AIs put it here
Source ↗

More about the top three ↓

02More about the top three

The ranking is above. Here is more about the three places at the top: what they are, why they are here, and what is worth knowing.

The three shares use different GDP years, sources and exchange rates (UBS is 149% or 164%, Santander 107–120%), so compare them roughly, not to the point.

1UBS

No. 1 — UBS. On the lists of 7 of 7 AIs; median place there: 1. The AIs put UBS first because its balance sheet is bigger than the whole Swiss economy that would have to rescue it.

UBS · Public domain · Wikimedia Commons

Did you know

When UBS took over Credit Suisse in 2023, it signed a deal with the Swiss government to cover 9 billion francs of possible losses. UBS pays the first 5 billion francs itself. The state covers anything beyond that, up to a maximum of 9 billion.
Source ↗

What it is: Switzerland's biggest bank, formed when it took over Credit Suisse in 2023.
Its edge: It is the only one of the three whose assets exceed its home country's GDP.
Who should know: Useful for anyone curious how a bank can be too big for its own country to save.

Assets vs home GDP149% of Swiss GDP
Founded1854
HeadquartersZurich

Wikipedia · Wikidata

Did you know

UBS began as a small bank in the town of Winterthur, founded in 1862 with 5 million francs of share capital. In 1912 it merged with the Toggenburger Bank. The result was the Union Bank of Switzerland, which merged with Swiss Bank Corporation in 1998 to become UBS.
Source ↗

Where to go further

Open UBS's 2025 annual report PDF. Start with the balance sheet and find the total assets line, then compare that number with the size of Switzerland's economy.
Source ↗

Video: Why Wealthy Americans Love UBS, The Secretive Swiss Banking Giant · CNBC

Compare the top three ↓

2Banco Santander

No. 2 — Banco Santander. On the lists of 7 of 7 AIs; median place there: 3. The AIs rank Santander second because its assets match Spain's whole economy, though most of its income comes from abroad.

Interbrand (Madrid office) [ 1 ] · Public domain · Wikimedia Commons

Did you know

In June 2017 Santander bought Banco Popular, then Spain's sixth-largest bank, for a symbolic price of just one euro. Popular had been judged failing, and Santander planned a capital increase of about 7 billion euros to strengthen it.
Source ↗

What it is: Spain's biggest bank, earning most of its money in Europe and the Americas.
Its edge: Its assets are about the size of its home economy, closer than HSBC's.
Who should know: Useful for anyone wondering who pays if a bank earns abroad but fails at home.

Assets vs home GDP107–120% of Spanish GDP
Founded1857
HeadquartersSantander, Cantabria

Wikipedia · Wikidata

Why it is here

Santander's balance sheet stood at EUR 1,867,515 million at 31 December 2025. That includes EUR 75,011 million held for sale, mainly its Poland business. This is a bank bigger than most countries' economies, spread across many markets. — Santander, Q4 2025 financial report (SEC filing)
Source ↗
The Financial Stability Board puts Santander in the lowest bucket (1.0% extra capital). UBS sits at 1.5% and HSBC at 2.0%. So despite its size, regulators see Santander as less systemic than the other two. — Financial Stability Board, 2025 G-SIB list
Source ↗

History

In 1994, Santander won control of Banesto at an auction run by the Bank of Spain. Banesto had been taken into state hands in 1993 after an accounting scandal, and the win made Santander Spain's leading bank.
Source ↗

Keep in mind

Spain's anti-money-laundering watchdog reportedly fined Santander more than €40 million over weak internal checks at its online unit Openbank. Sources say the amount reflects the bank's size, not how serious the events were.
Source ↗
Brazil is a weak spot. Santander's record results were overshadowed there, where it set aside more money for loans that may not be repaid, with interest rates at 15% and elections coming in 2026.
Source ↗

Where to go further

Open Santander's 2025 Form 20-F, filed with the US SEC. Look first for the page that splits income by country, to see how much comes from outside Spain.
Source ↗

Compare the top three ↓

3HSBC

No. 3 — HSBC. On the lists of 7 of 7 AIs; median place there: 4. The AIs put HSBC third because its assets are large next to UK GDP, while most of its profit comes from Asia.

HSBC · Public domain · Wikimedia Commons

Did you know

HSBC's two bronze lions in Hong Kong are named Stephen and Stitt, after two bank managers. In World War II, Japan took them to be melted down. The war ended first, and an American sailor spotted them in an Osaka dockyard in 1945.
Source ↗

What it is: A London-based bank that earns most of its money in Asia, especially Hong Kong.
Its edge: It sits in a higher regulator risk bucket than UBS and Santander.
Who should know: Useful for anyone curious why a bank's home country may matter less than its profits.

Assets vs home GDP81–86% of UK GDP
Founded1865
HeadquartersLondon

Wikipedia · Wikidata

Why it is here

HSBC is in the FSB's bucket 3, which means 2.0% extra capital. That is a higher bucket than UBS (1.5%) and Santander (1.0%). Only JPMorgan, at 2.5%, sits above it. — Financial Stability Board, 2025 G-SIB list
Source ↗
HSBC's Hong Kong business brought in $15.9bn of the group's $71.0bn revenue in 2025 (excluding notable items). The UK brought in $12.9bn. Hong Kong is a bigger earner than the bank's British home market. — HSBC, Annual Results 2025
Source ↗

Did you know

Stephen roars and Stitt looks calm. Insiders said this matched the two bankers' personalities. People rub the lions' paws and noses for luck. The Hong Kong pair were modelled on lions first placed at the bank's Shanghai office in 1923.
Source ↗

History

In 1992 HSBC bought full ownership of Midland Bank after a short bidding war with Lloyds. The deal forced HSBC to move its headquarters from Hong Kong to London on 1 January 1993.
Source ↗

Keep in mind

In 2012 HSBC agreed to pay about $1.92bn to US authorities over money laundering. Its CEO said the bank accepts responsibility for past mistakes. A TV reporter called the fine "a huge slap on the wrist".
Source ↗

Where to go further

Start with the Strategic Report 2025, the shorter of HSBC's two main 2025 reports. Look for how the bank's income is split between regions, to check the claim that only about a fifth of revenue comes from Britain.
Source ↗

Video: What’s behind HSBC’s privatisation of Hang Seng Bank? · South China Morning Post

Compare the top three ↓

The top three side by side

	UBS	Banco Santander	HSBC
In the AIs' lists	7 / 7	7 / 7	7 / 7
Assets vs home GDP	149% of Swiss GDP	107–120% of Spanish GDP	81–86% of UK GDP
Founded	1854	1857	1865
Headquarters	Zurich	Santander, Cantabria	London
Put first by	Claude, ChatGPT, Grok, Gemini, MiMo, Kimi, DeepSeek	—	—

Places with the same number of AIs are ordered by their average place in the AIs' own lists.

03Worth knowing

What the AIs noticed while building the list.

The contrast: JPMorgan Chase holds $5,015bn of assets and sits alone in the FSB's top bucket, yet that is only about 14–16% of US GDP, depending on which GDP year is used.

Noticed by:

Included it: Gemini, MiMo, DeepSeek. Did not include: Claude, ChatGPT, Grok, Kimi.

01Final list

UBS

Banco Santander

HSBC

BNP Paribas

ING Group

Crédit Agricole

Barclays

Standard Chartered

Mitsubishi UFJ Financial Group (MUFG)

Société Générale

02More about the top three

1UBS

Did you know

2Banco Santander

Did you know

3HSBC

Did you know

The top three side by side

More ratings

03Worth knowing

04How we counted

1The question

2Why this topic

3Where it applies

4What we looked at

5Who ranked

6How the places were set

05Each AI's own list

What Claude noticed

What ChatGPT noticed

What Grok noticed

What Gemini noticed

What MiMo noticed

What Kimi noticed

What DeepSeek noticed