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Chase has widened its market share lead in the Chicago banking market, according to numbers released Monday by the Federal Deposit Insurance Corp.

The New York-based bank had market share in the Chicago area of 24.8 percent in the year ended June 30, up from 23.4 percent in the prior year.

Canadian-owned BMO Harris Bank kept its No. 2 position, with market share of 12 percent, down slightly from 12.1 percent.

Charlotte-based Bank of America, which became No. 2 after its 2007 purchase of LaSalle Bank, remained No. 3 and saw its market share climb from 8 percent to 8.2 percent.

Chicago’s largest locally headquartered bank, Northern Trust Corp., had market share of 7.5 percent, up from 6.5 percent in the prior year.

The three biggest banks all shed area branches from the previous year.

Chase had 397 locations as of June, compared with the previous year’s 441. BMO Harris Bank fell to 225 from 227. Bank of America declined to 168 from 172.

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