The UK:

Bradford & Bingley.

The UK mortgage lender and savings institution, a listed firm, has been taken over by the UK government. Its savings business is to be sold to Spanish bank Santander, which also owns the UK lender Abbey.

Northern Rock.

Like B&B, Northern Rock is a financial institution dating its origins back many decades in the north of England. It was taken over by the UK government in February 2008. Its shares collapsed in value and the bank’s aggressive lending and high-yield savings policy became unstuck because it was funding a considerable portion of its lending via the short-term commercial paper market, which spiked in price during the summer and autumn of 2007. Its total debt obligations of around £100 billion have been added to the UK public debt for accounting purposes.

HBOS.

The bank has agreed to be taken over by Lloyds TSB in a $22.2 billion deal, although as of the time of writing there is still uncertainty about whether the deal will proceed. HBOS’s business includes Insight Investment, the asset management firm. Lloyds operates a private banking arm.

Dawnay Day.

The conglomerate, including hedge fund and commodity trading businesses, called in administrators due to a cash crisis. Since then, a number of its affiliate businesses have severed connections to the parent firm.

The US.

Freddie Mac, Fannie Mae. These two organisations - to use their popular Wall Street nicknames - were government-backed agencies that stood behind the mortgages of about half of the $12 trillion US mortgage market. They were nationalised in early September following growing fears that their collapse would paralyse the US financial system. Some critics argue that these agencies, because they were ultimately supported by the US government anyway, encouraged lax lending policies that have contributed to the current market bust.

AIG, or American International Group, was saved from collapse in September by accepting an $85 billion federal loan. The US government has acquired a majority stake in AIG in what is effectively a debt-for-equity swap. AIG operates a substantial private banking business in jurisdictions including Switzerland. The firm has also announced it intends to offer clients of one of its funds the option to switch to another one.

Washington Mutual.

The takeover of the deposit-taking institution, based in Seattle, came after the largest bank failure in US history. JP Morgan Chase has bought the bank for $1.9 billion. Washington Mutual has total assets of $307 billion.

Merrill Lynch.

A household name with a large wealth management advisory arm and thousands of private client brokers, Merrill was one of the largest credit crunch victims. It has agreed to be bought by Bank of America in a $50 billion deal. As BoA does not have much of a wealth management presence outside its domestic market, the deal is not thought by analysts to be bad news for wealth managers at Merrill.

Bear Stearns.

One of the first big names to go, Bear Stearns, which had been building a smart new European HQ in London’s Canary Wharf, was bought by JPMorgan Chase in March with a $30 billion lending facility from the Federal Reserve. Initially, the purchase price of Bear was at a massive discount but later increased. Bear suffered heavy losses in its credit hedge funds in 2007.

Wachovia.

The bank, based in North Carolina, has been bought by Citi, for $2.16 billion. Wachovia, like Citi, has a significant wealth management operation.

Lehman Brothers.

Once the fourth-biggest US investment bank, it filed for bankruptcy in September. Its North American operations are to be bought by Barclays, although still subject to approval at the time of writing. The bankruptcy threatens to destroy or reduce the value of structured products sold by Lehman to wealth management clients.

Continental Europe

Fortis.

In an embarrassing volte face for the Dutch-Belgian group, Fortis has been part-nationalised by three European states and has also planned to sell off the ABN Amro business it acquired less than 12 months before. The ABN Amro businesses include a large private client operation. When Fortis acquired the private wealth business of the Dutch bank, it more than doubled its private wealth assets under management.

Dexia.

The governments of Luxembourg, Belgium and France have injected €6.4 billion into the bank, which specialises in local government lending, to prevent its collapse.