Great Depression

On the morning of February 15, 1932 customers began a run on the bank, waiting in lines that ran out of the building and onto the street. Tellers were instructed to honor all withdrawal requests. In 2.5 days, a total of $1.5 million was withdrawn. Near the end of the second day, Heber J. Grant, president of both the bank and the LDS Church, placed a sign in the bank's window that read, in part:

[The bank] is in a very strong, clean, liquid condition. It can pay off every depositor in full. Fear of its failure is not only without foundation, but positively foolish. There is not a safer bank in the State or the Nation.^[7]

Lines of depositors that had been as long as a city block began to dwindle, and within five or six days many customers returned to deposit their money. By month's end, total deposits were more than withdrawals, and Zions had survived the Great Depression.^[5]

In 1957, Zions merged with Utah Savings and Trust Company, established in 1889, and First National Bank of Salt Lake City, established in 1890.^[5] The surviving institution was named Zions First National Bank.^[3][8] These banks merged into Zions in 1957.^[3]

1960–2007

Keystone Insurance and Investment Co. was formed in April 1955 to acquire Lockhart Corporation. In April 1960, Keystone, together with several individual investors, acquired a 57.5% interest in Zions First National Bank from the LDS Church.^[3] At that time, the bank had deposits of approximately $120 million.^[3] In 1965, the name of the company was changed to Zions Bancorporation. However, it operated as Zions Utah Bancorporation from 1966 to 1987.^[3]

It acquired Bank of Kearns in 1962, Bank of Spanish Fork in 1968, Utah National Bank in 1969, Bank OF Commerce, Bank of St. George, and Bountiful State Bank in 1970, Bank OF Vernal and Carbon Emery Bank in 1973.^[8]

In January 1966, Zions became a public company via an initial public offering.^[5] There continued to be some minority shareholders until April 1972, when the company exchanged the remaining minority shares for common shares.

The bank expanded into Nevada in 1985 with the purchase of Nevada State Bank.^[9]

The bank entered Arizona in 1986 with the acquisition of Mesa Bank.^[7][10]

It expanded into Colorado and New Mexico in 1996 by acquiring Aspen Bancshares, which operated Pitkin County Bank and Trust, Valley National Bank of Cortez, and Centennial Savings Bank.^[11]

In March 1997, Zions acquired 27 branches in Arizona, Idaho, Nevada, and Utah from Wells Fargo.^[12]

In July 1997, Zions acquired Tri-State Bank of Idaho.^[13]

In September 1997, Zions acquired Vectra Banking Corporation and Tri-State Finance Corporation of Colorado for a total of $200 million.^[14][15][16]

In 1999, the company bid for First Security Corporation but lost to Wells Fargo after the U.S. Securities and Exchange Commission forced Zions to restate its results in prior years due to the way it accounted for acquisitions.^[17][18] Despite the unsuccessful pursuit of First Security, Zions became the largest bank headquartered in Utah.

In December 2005, the company expanded into Texas with the acquisition of Amegy Bank.^[19]

2008–present

On October 27, 2008, Zions received a $1.4 billion investment from the U.S. government as a result of the Troubled Asset Relief Program.^[20] It repaid the final $700 million on September 26, 2012,^[21] and the government realized a profit of $253 million from its investment in the company.^[22][23]

In 2010, Zions sold NetDeposit to BankServ.^[24][25]

On June 1, 2015, Zions Bancorporation announced a corporate restructuring, which included the consolidation of seven bank charters into a single charter and $120 million in expense reduction initiatives.^[26]

In October 2018, Zions merged the holding company and its banking subsidiary ZB, N.A. into Zions Bancorporation, N.A.^[27]