| 1953 |
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• Stavros J. Costopoulos is re-elected Chairman of the Board of Directors, while Spyros J. Costopoulos assumes the responsibilities of Managing Director.
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 Stavros J. Costopoulos Chairman of the Board of Directors of the Commercial Credit Bank Photograph Alpha Bank Historical Archives
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| 1956 |
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• Two additional storeys are completed at the Main Building of the Bank in Athens and the areas on the ground floor are renovated and reorganised.
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 The Main Building of the Commercial Credit Bank at the junction of Stadiou and Pesmazoglou Streets, 1957-60 Photograph Alpha Bank Historical Archives
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| 1957 |
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• A Branch is established in Patra.
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 The façade of the Patra Branch, 1957 Photograph Alpha Bank Historical Archives
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| 1958 |
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• A Branch is established in Thessaloniki.
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