Investors Bank, rooted in the American banking landscape, has a rich history dating back to 1926 when it was initially incorporated as the Washington Rock Building and Loan Association. Its journey saw a name change sixteen years later to Investors Savings and Loan Association, which through various mergers, acquisitions, and internal expansions, later transitioned into Investors Savings Bank. The bank underwent significant transformations over the years, notably in 1997, when it transitioned from a New Jersey-chartered mutual savings bank to a New Jersey-chartered stock savings bank. This reorganization saw the birth of a two-tiered holding company structure, with the bank becoming a wholly-owned subsidiary of Investors Bancorp, Inc. In 2005, the holding company became partially public, trading on NASDAQ, and by 2014, it became fully public. However, 2022 marked a significant milestone when Investors Bank was acquired by Citizens Financial Group, with all its locations rebranded as Citizens Bank by February 28, 2023​. To Read Core Details Of Investors Bank In short CLick Here.

The bank, whose headquarters was nestled in Short Hills, New Jersey, was a publicly traded, full-service institution. It was known for offering a gamut of financial services including banking, investment, and retirement services​. Boasting over 150 branches, Investors Bank marked its presence predominantly across New Jersey and New York​​.

Investors Bank was categorized as a State Savings Bank, under the charter class of a commercial bank, state charter, and Fed non-member, supervised by the FDIC. It held the FDIC Certification ID number 28892, reflecting its insured status​. The bank also had a routing number 026011701 for facilitating various transactions. Here is the list of Investors Bank Routing Numbers CLick Here.

However, the exact number of states they operated in besides New Jersey and New York, and their specific banking policy remain elusive as the available resources do not provide a clear delineation of these details. Furthermore, the number of branches is specified as 'over 150,' but a precise count is not provided. Even though there's a mention of Investors Bank branches across the United States on a bank listing site, it doesn't provide a definitive number of states the bank operated in nor does it provide further insights into the bank's policies​​.

Thus, while we have a substantial narrative of Investors Bank’s journey and its structural details, some facets like the number of states they operated in and their precise banking policies require further exploration.