M&A target Atom Bank would boost UK building societies' digital offerings

Digital lender Atom Bank PLC's tech capabilities are the biggest draw for its would-be acquirers in the UK banking sector, according to industry executives.

Atom Bank has attracted takeover interest from Leeds Building Society and Yorkshire Building Society, the Financial Times reported May 30. Other bidders could emerge, and Atom Bank's owners are seeking at least £600 million, according to the report.

The reported interest underscores the growing need for UK building societies to scale up and adapt as financial services providers grapple with rapidly evolving technology.

"If I were sitting in the [Yorkshire] or Leeds boardroom, I would not view Atom primarily as a bank," said Jonathan Simnett, managing director at technology M&A advisory firm Hampleton Partners. "I would view it as a regulated digital banking platform with a proven mortgage and savings engine attached."

Whoever acquires Atom Bank gains "immediate access point to a modern digital banking platform," said Will Banks, CEO of corporate advisory firm Challenger Capital. Building societies can struggle to upgrade their systems and create user-friendly digital experiences, but Atom Bank "has already done the hard work of building this capability," said Banks.

Yorkshire already invests heavily in digitization, and acquiring Atom Bank represents the quickest way to become the UK's leading digital mutual, according to Simnett. For Leeds, a deal "could compress a decade of technology transformation into a single acquisition," Simnett said.

Atom Bank began operating in 2016 and mainly provides savings accounts, mortgages and business loans. It takes customer deposits to fund its lending activities but does not offer current accounts.

The company reported a cost-to-asset ratio of 0.84% for the year ended March 31, 2025, up from 0.79% in the year-ago period. It had about 272,000 customers as of March 2025, up 19% from a year before, according to its latest available annual report.

Atom Bank's deposits grew 31.6% in 2025 to £7.5 billion. Its residential mortgage book amounted to £4.2 billion, while its SME lending book amounted to £1.1 billion.

Atom Bank did not respond to requests for comment.

Acquisition interest

Leeds and Yorkshire are two of the largest UK building societies. As a form of mutual, they are governed by their members rather than shareholders and typically offer mortgages at rates favorable to their borrowers, since profit generation is not their primary goal.

Yorkshire is the 10th-largest bank in the UK, with assets of £66.33 billion, while Leeds is the 15th-largest, with assets of £31.96 billion, according to Market Intelligence data. Atom Bank had £9.03 billion of assets as of March 31, 2025, according to its latest available annual report.

Mutuals have been active in the recent wave of bank M&A in the UK and broader Europe. Nationwide Building Society acquired Virgin Money in 2024 in a £2.85 billion deal, one of the biggest bank deals in the UK in recent history. Coventry Building Society also bought fellow mutual Co-operative Bank for £780 million.

"The recent acquisitiveness among building societies is less about opportunistic dealmaking and more about strategic adaptation," Simnett said. It signals a need to scale up and better compete in an industry that has significantly evolved over the past decade, Simnett added.

Building societies have traditionally leaned on their trusted brands, loyal members, and focus on savings and mortgages. "While those strengths are still important, they are not enough anymore," said Banks. "Today's market rewards scale, digital capabilities, efficient balance sheets, quick execution, and a smooth customer experience."

The UK Financial Conduct Authority's Financial Lives Survey 2024 found that 93% of respondents said they used online or mobile banking services in the previous 12 months, up from 78% in 2017. The percentage of respondents who said they availed of in-branch face-to-face banking services steeply declined to 26% in 2024 from 63% in 2017.

Enough firepower

Both mutuals appear to have the financial firepower to acquire Atom in a cash deal as they have strong excess capital positions on a nominal basis, said John Cronin, founder of financial sector research firm SeaPoint Insights, in a note. Leeds' common equity Tier 1 ratio was 25.5% at the end of 2025, while Yorkshire's was 18.8%.

Pricing and valuation appear to be the biggest hurdle for a deal with either suitor. Since building societies are member-owned, they must justify to their owners the long-term value of any deal, Banks said, noting that sellers expecting a high price while buyers deeming Atom as still working on profitability could "create a tough gap to bridge."

"The more important question is: Can buyer and seller agree on a valuation that fairly reflects both Atom's current economics and its strategic potential?" Simnett said.

Offers could be lower than the at-least £600 million Atom's owners are seeking, according to the FT, adding that other bidders could emerge. Atom Bank had previously planned to launch an IPO in 2022, but reportedly switched to exploring a sale, with Sky News noting in April that it could seek a valuation of up to £1 billion.

Leeds did not comment on the reported M&A interest, while a spokesperson for Yorkshire said the firm does not comment on speculation.

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