Barclays PLC said Monday it will acquire ABN Amro NV for $91.16 billion in the world's largest bank takeover, capping a month of negotiations to create a global financial services giant.

As part of the deal, ABN Amro announced it was selling its U.S. unit, LaSalle Bank, to Bank of America Corp. for $21 billion in cash.

The proposed chief executive of the new group, Barclays CEO John Varley, called the deal "the largest merger ever in global financial industry," and said it holds out the promise of growth at a rate twice as fast as global GDP.

Despite the agreement, ABN Amro said it will go ahead with meetings with representatives from Royal Bank of Scotland PLC, Spain's Banco Santander Central Hispano SA and Belgian-Dutch bank Fortis NV, which invited ABN Amro to enter talks earlier this month.

Those talks would be aimed at splitting up ABN Amro and selling off parts of its operations to each, which could be more lucrative for shareholders.

Under the deal announced Monday, Barclays offered 36.25 euros ($49.25) for each ABN Amro share, slightly below Friday's closing price of 36.29 euros ($49.38). Varley valued the deal at a 33 percent premium from ABN Amro's share price when talks began last month.

ABN Amro shares rose 1 percent to 36.66 euros ($49.88). Barclays shares fell 2 percent to 735 pence ($14.70).

"The proposed merger of ABN Amro and Barclays will create a strong and competitive combination for its clients with superior products and extensive distribution," the banks said in a statement. "The merged group is expected to generate significant and sustained future incremental earnings growth for shareholders."

For each share, ABN Amro shareholders will be offered 3.225 ordinary shares in the new group, to be called Barclays PLC. The companies said the deal would create a single bank with 47 million customers worldwide. Bank branches were likely to retain their brand names.

The new group will be based in Amsterdam — seen as a negotiating concession to the Dutch — and Varley said he would base himself in the Dutch capital. But the group said it would remain a British "tax resident."

Dutch Finance Minister Wouter Bos, who must approve the deal, said the merger "would fit in the consolidation that is expected to take place within the European banking sector."

The group said it expected to see $4.8 billion in annual cost savings by 2010. Some 12,800 jobs will be trimmed from the combined work force of 217,000, and 10,800 others would migrate to cheaper offshore locations, the banks said.

Varley said Barclays' return on investment would be 13 percent by 2010, which he said "represents a very attractive opportunity for our shareholders."

Both banks said they would recommend the deal to their shareholders, and ABN Amro was due to hold a shareholder meeting this week. The merger was expected to be completed during the fourth quarter of this year, the banks said.

Varley said shareholders faced a stark choice: Either deconstruct ABN Amro by opting for the competing consortium's bid, or form one of the world's largest banks by accepting Barclays takeover.

Executives refused to speculate on what would happen if the consortium offered a higher bid.

The Children's Investment Fund, a hedge fund that owns a 2 percent stake in ABN Amro and which had pushed for the bank's breakup to improve shareholder earnings, said it was studying the proposed deal.

Varley said the combined power of ABN Amro and Barclays would provide a solid platform for continued expansion.

"This is the start, not the end. We are assembling a group uniquely qualified to compete for business all around the world," he said. He singled out Asia as one area for growth.

Alongside proposed chief executive Varley, Bob Diamond — head of investment banking at Barclays — will be president. The new board will initially consist of 10 members from Barclays and nine members from ABN Amro. Arthur Martinez, chairman of ABN Amro's supervisory board, will be nominated as chairman.

Rijkman Groenink, ABN Amro's CEO for the last seven years, said he would not accept an executive role. Groenink presided over the bank during a period when major shareholders criticized the performance of the bank's shares. Groenink said he would move to a non-executive directorship position.

The deal must be approved by financial regulators, but the banks have been consulting with the regulators during the negotiating process.

For 2006, ABN Amro's net profit rose 7.7 percent to $6.42 billion. Barclays posted an annual net profit of 4.57 billion pounds ($9.14 billion), a rise of a third from 2005.