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Santander UK’s chief to step down ahead of TSB merger

Mike Regnier will leave after four years leading Santander UK, with the bank serving 14 million active customers and pursuing a £2.65 billion TSB acquisition, the board said.

  • On Friday, Santander UK announced Mike Regnier, Chief Executive Officer of Santander UK, will step down by Q1 2026 and the board has started the successor search.
  • Having joined from Yorkshire Building Society, Regnier said he wants to pursue other interests and felt now was the right time after four to five years at Santander.
  • The deal announced in July involves Santander acquiring TSB for 2.65billion, serving roughly 14 million active customers, 7 million digital customers, 444 branches, and £183.4bn in deposits.
  • Ana Botin, Executive Chair of Banco Santander, said the move allows an orderly transition amid fears the TSB brand could disappear and branch closures may follow; Santander UK chair Tom Scholar added strong succession plans expect appointment in the early part of 2026.
  • The acquisition remains subject to regulatory approval, and Regnier urged finding a successor now because integration of TSB will take longer than his remaining tenure.
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The CEO of Santander UK, Mike Regnier, has decided to leave office with effect since the first quarter of 2026, while the group has modified the board of directors of the British subsidiary with a new appointment. Regnier joined Santander UK, the British subsidiary of Banco Santander in the United Kingdom, in March 2022. Santander has highlighted its supervision of business transformation that has culminated in the acquisition of TSB from Banco …

·Madrid, Spain
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The managing director of Santander UK, Mike Regnier, has confirmed that he will leave his post in the first quarter of 2026, after four years in charge of the entity. The decision, according to the executive himself, responds to a personal planning in which he never contemplated remaining much beyond that time horizon. Regnier joined Santander UK in March 2022, and during his term of office he oversaw a decisive stage for the British subsidiary …

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Bloomberg broke the news in United States on Friday, October 3, 2025.
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