First Interstate Bancorp
Corporate brand
UnclaimedA former American bank holding company that built a major western U.S. banking network before being acquired by Wells Fargo in 1996.
Last updated August 26, 2026
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Overview
First Interstate Bancorp was an American bank holding company headquartered in Los Angeles and one of the largest banking organizations in the western United States. Its institutional lineage extended from the banking assets assembled by Amadeo Giannini and Transamerica Corporation during the first half of the twentieth century. Regulatory changes following the separation of Transamerica and Bank of America led to the banking operations being spun off in 1958 as Firstamerica Corporation. The company subsequently operated under the Western Bancorporation name and used United California Bank, or UCB, for much of its California retail banking business. The company expanded through acquisitions, branch growth, and diversification into financial services. During the 1960s it developed a sizeable California and western-state presence, while later initiatives added mortgage banking, discount brokerage, merchant banking, equipment leasing, venture capital, and other activities. In June 1981, Western Bancorporation adopted the First Interstate Bancorp name. The First Interstate identity was then applied across much of the group, creating a unified brand for a network of affiliated banks. First Interstate was also involved in the development of card services. Its affiliated banks offered locally issued Master Charge cards in the early 1970s; after the evolution of the national card organizations, those operations became associated with MasterCard. In the 1980s, the company pursued broader financial-services activities, including securities and commodities services through First Interstate Discount Brokerage, merchant banking through Continental Illinois Ltd., equipment leasing through Commercial Alliance Corporation, and expanded mortgage operations through Republic Realty Mortgage Corporation. The company’s growth was interrupted by major credit problems. Weak real-estate lending and the severe California recession produced substantial losses in 1987, 1989, and 1991. First Interstate responded by reducing risk, disposing of noncore or unprofitable businesses, and concentrating on strengthening its existing banking franchise rather than continuing aggressive expansion. Its attempted hostile takeover of Bank of America in 1986 and 1987, initially valued at approximately $3.2 billion, failed. The company nevertheless acquired Allied Bancshares of Houston in 1987. Under chairman and chief executive Edward M. Carson, First Interstate recovered during the first half of the 1990s. It acquired 15 Washington branches from failed Great American Bank in 1994, but remained a potential target during the consolidation of the American banking sector. Wells Fargo launched a hostile bid in October 1995. First Bank System also pursued First Interstate and reached a proposed merger agreement, but regulatory and structural problems caused that proposal to collapse in January 1996. Wells Fargo and First Interstate then agreed to an all-stock transaction initially valued at approximately $11.3 billion. Wells Fargo completed the acquisition on April 1, 1996 and announced plans to eliminate 7,200 jobs. The First Interstate name did not disappear entirely. First Interstate BancSystem of Montana had operated under a franchise agreement using the name and logo since 1984. Following the 1996 breakup of the California-based holding company, the Montana organization negotiated to retain the brand. It became the continuing corporate user of the First Interstate name, while First Interstate Bancorp itself ceased to exist as an independent company. The historical company’s former New York Stock Exchange symbol was I; the modern ticker FIBK belongs to First Interstate BancSystem, a successor brand user rather than to First Interstate Bancorp.
History
The history of First Interstate Bancorp is rooted in the western banking network assembled by Transamerica Corporation. Amadeo Giannini formed Transamerica in 1928 to consolidate financial ventures that included banking and nonbanking businesses. Through acquisitions from the 1930s to the 1950s, the group accumulated banks and related financial companies across the western United States. Regulatory intervention changed the structure of the enterprise. In 1953, authorities required the separation of Transamerica and Bank of America under the Clayton Antitrust Act. The Bank Holding Company Act of 1956 imposed additional restrictions on the combination of banking interests and other activities. As a result, Transamerica’s banking operations, comprising 23 banks in 11 western states, were separated in 1958 into Firstamerica Corporation. The new company conducted business through First Western Bank and Trust Company and changed its name to Western Bancorporation in 1961. Western Bancorporation expanded substantially during the 1960s. Its California retail operations used the United California Bank name, particularly after the acquisition of California Bank in Los Angeles. The company sought to compete with Bank of America by expanding its branch network and adding financial-services capabilities. It established a mortgage company in 1974 and a venture-capital company in 1979. During the early 1970s, its affiliated banks also offered locally issued Master Charge cards, which later became part of the MasterCard system. The organization experienced a serious affiliate failure in 1970 when United California Bank of Basel collapsed following unauthorized commodity-futures trades. The episode resulted in criminal convictions and imprisonment for several bank officers. It remains a significant historical risk and governance event associated with the company’s predecessor banking network. In June 1981, Western Bancorporation became First Interstate Bancorp. The new name was intended to provide a consistent identity for the group’s banks. During the 1980s, deregulation encouraged the company to diversify beyond conventional deposits and loans. It created First Interstate Discount Brokerage in 1983, acquired Continental Illinois Ltd. for merchant banking in 1984, bought Commercial Alliance Corporation for equipment leasing, and expanded mortgage banking through Republic Realty Mortgage Corporation. First Interstate also pursued transformative acquisitions. In 1986 and 1987 it attempted to acquire Bank of America in a hostile transaction reported at approximately $3.2 billion. The proposal failed, but First Interstate acquired Allied Bancshares, a Houston-based bank. The company then encountered its own financial difficulties. Losses tied to real-estate lending and the California recession occurred in 1987, 1989, and 1991. Management responded by selling or closing noncore operations, including equipment leasing, a government-securities business, and most of the wholesale banking unit. The strategy shifted from rapid expansion toward balance-sheet repair and improvement of the existing franchise. First Interstate’s condition improved by the middle of the 1990s under chairman and chief executive Edward M. Carson. In 1994, it acquired 15 Washington branches from failed Great American Bank. Nevertheless, nationwide consolidation made the company a takeover candidate. Wells Fargo launched a hostile bid in October 1995, while Norwest, Bank One, and First Bank System were also identified as possible alternatives. First Bank System reached a merger agreement with First Interstate in November, but regulatory difficulties surrounding its offer forced it to withdraw in January 1996. Wells Fargo and First Interstate reached an agreement shortly afterward. The stock transaction was initially valued at approximately $11.3 billion, and Wells Fargo completed the purchase on April 1, 1996. The acquiring company announced 7,200 job eliminations. The First Interstate brand survived through a separate Montana organization. First Interstate BancSystem had received a franchise to use the name and logo in 1984. After the California holding company was dismantled, the Montana company negotiated to retain those brand assets. Consequently, the modern First Interstate identity belongs to First Interstate BancSystem, while the original First Interstate Bancorp is a defunct historical holding company.
- 1996
Acquired by Wells Fargo
[1]Wells Fargo completed its acquisition of First Interstate Bancorp on April 1, ending the company’s independent existence.
- 1994
Washington branches acquired from Great American Bank
[1]First Interstate acquired 15 Washington branches from failed Great American Bank.
- 1986
Bank of America takeover attempt begins
[1]First Interstate initiated an unsuccessful hostile bid for Bank of America, a move reported at approximately $3.2 billion.
- 1983
Discount brokerage business established
[1]First Interstate created First Interstate Discount Brokerage to provide securities and commodities services to bank customers.
- 1981
First Interstate Bancorp name adopted
[1]Western Bancorporation changed its corporate name to First Interstate Bancorp and began consolidating its banking brands under First Interstate.
- 1961
Firstamerica becomes Western Bancorporation
[1]The company adopted the Western Bancorporation name while its California retail operations continued under the United California Bank identity.
- 1958
Banking operations become Firstamerica Corporation
[1]Transamerica’s western banking operations were spun off as Firstamerica Corporation following antitrust and bank-holding-company regulation.
- 1928
Transamerica Corporation is formed
[1]Amadeo Giannini formed Transamerica to consolidate banking and other financial ventures that later supplied the institutional foundation for First Interstate’s predecessor network.
Products and positioning
Large regional bank holding company serving the western United States, with a broad commercial and retail banking platform and related financial-services businesses.
Consumer banking
Retail banking
The company operated a broad western branch network offering conventional deposit accounts, payments, consumer credit, and other branch-based banking services. United California Bank was the principal California retail identity before the First Interstate brand was introduced across the system.
Business banking
Commercial banking
Commercial banking supplied loans, deposits, cash-management support, and related services to businesses and institutions. Real-estate lending became a major source of losses during the California recession and contributed to the company’s later retrenchment.
Payment cards · 1970
Master Charge and MasterCard services
Affiliated banks offered locally issued Master Charge cards during the early 1970s. As the national card structure evolved, the business became associated with MasterCard International and the MasterCard name.
Brokerage · 1983
First Interstate Discount Brokerage
Established in 1983, the discount brokerage provided bank customers with access to securities and commodities services, extending the group into investment-related financial services.
Mortgage finance · 1974
Mortgage banking
First Interstate developed mortgage capabilities through its Western Bancorporation Mortgage Company and later broadened those activities with the acquisition of Republic Realty Mortgage Corporation.
Specialized finance · 1984
Merchant banking and equipment leasing
The group entered merchant banking through Continental Illinois Ltd. and equipment leasing through Commercial Alliance Corporation in 1984. Both activities were later part of the noncore businesses reduced during the company’s restructuring.
Controversies
Brand decisions
1996
Sale to Wells FargoM&ABackground
Industry consolidation and competing takeover proposals placed First Interstate under sustained acquisition pressure.
Action taken
First Interstate accepted Wells Fargo’s all-stock merger proposal after a competing First Bank System agreement collapsed over regulatory issues.
Aftermath
Wells Fargo completed the acquisition on April 1, 1996. First Interstate Bancorp ceased operating as an independent company, while its name and logo continued through a Montana franchisee.
Initial reported transaction value. (1996)
- First Bank System — First Bank System pursued First Interstate and reached a proposed merger agreement, but withdrew after regulatory difficulties.
1991
Retrenchment after real-estate and recession lossesStrategyBackground
Bad real-estate loans and the California recession produced substantial losses in several years, weakening the company’s position.
Action taken
Management emphasized repairing existing operations and disposed of noncore activities, including equipment leasing, a government-securities operation, and most of the wholesale banking unit.
Aftermath
The company recovered by the middle of the decade and became a takeover target during the subsequent wave of banking consolidation.
1986
Attempted hostile acquisition of Bank of AmericaM&ABackground
First Interstate sought a transformational expansion against the largest banking institutions in California.
Action taken
It pursued a hostile takeover of Bank of America, with the bid reported at approximately $3.2 billion.
Aftermath
The bid was defeated. First Interstate subsequently acquired Allied Bancshares of Houston instead.
Reported value of takeover bid. (1986–1987)
1981
Unify the banking network under the First Interstate identityStrategyBackground
The company operated through multiple predecessor and affiliated bank names, limiting consistency and recognition across its western network.
Action taken
Western Bancorporation changed its corporate name to First Interstate Bancorp and applied the First Interstate name more broadly across its banks.
Aftermath
The move created the First Interstate systemwide brand that was later retained by First Interstate BancSystem of Montana under a franchise arrangement.
Sources1 sources
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