Sixth Street and Bayview Acquire Castle Trust Bank to Fuel Specialist Lending and Retail Savings Growth
By Lauren Towner · 3 August 2026

Quick Summary
Castle Trust Bank has been acquired by Sixth Street and Bayview Asset Management from J.C. Flowers & Co. The acquisition provides the specialist bank with fresh capital to expand its retail savings franchise, specialist property lending, and retail finance operations while leveraging a tech-enabled platform for scale.
How Will the Castle Trust Bank Acquisition Drive Growth?
The acquisition by Sixth Street and Bayview provides Castle Trust Bank with the significant financial strength and long-term capital necessary to scale its operations. The new owners have committed additional capital to fuel expansion across the Bank's core business lines. This includes:
- Expanding the retail savings franchise to attract more customer deposits.
- Broadening the specialist property finance loan book, which already exceeds £1.1 billion.
- Deepening the commitment to Omni Capital Retail Finance, the Bank's dedicated retail finance arm.
What Results Has Castle Trust Bank Delivered to Date?
Castle Trust Bank enters this new chapter with a strong foundation of growth and a proven track record in specialist lending. The Bank currently serves nearly 170,000 customers and has successfully scaled its balance sheet across multiple verticals. Key performance metrics include:
- £1.6 billion in customer savings balances.
- A £1.1 billion specialist property finance loan book.
- Over £200 million in retail finance loans.
Why is this Acquisition Significant for the UK Banking Market?
The partnership between Sixth Street and Bayview signals a high degree of confidence in the UK specialist banking sector. Both firms bring deep expertise in credit markets and asset-based finance, which will be critical as Castle Trust Bank navigates future market transformations. The Bank’s leadership, led by CEO Martin Bischoff, remains in place to ensure continuity. This transition allows the Bank to invest further in its customer proposition and innovative product development, ensuring it can meet the evolving needs of borrowers and savers alike.
FF NEWS TAKE:
This acquisition definitely moves the needle for the UK specialist banking landscape. By shifting from J.C. Flowers to the combined might of Sixth Street and Bayview, Castle Trust Bank gains access to a deeper pool of capital and sophisticated asset-based finance expertise. In an era where scale and tech-efficiency are paramount, this deal provides the Bank with the firepower to aggressively challenge larger incumbents in the property and retail finance niches.
Companies in this story: Sixth Street, Bayview Asset Management, Omni Capital Retail Finance, J.C. Flowers & Co, Castle Trust Bank
People in this story: Martin Bischoff, Pierre Lussato, Masashi Washida