Sixth Street and Bayview Acquire Castle Trust Bank to Fuel Specialist Lending and Retail Savings Growth
By Lauren Towner · 3 August 2026
In brief: Castle Trust Bank has been acquired by Sixth Street and Bayview Asset Management from J.C. Flowers & Co to accelerate growth in retail savings and specialist property finance.
| Customer Base | 170,000 customers |
|---|---|
| Savings Balances | £1.6 billion |
| Property Loan Book | £1.1 billion |

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.
Frequently asked questions
Who acquired Castle Trust Bank?
Castle Trust Bank was acquired by investment firms Sixth Street and Bayview Asset Management as equal partners. The bank was previously owned by the private equity firm J.C. Flowers & Co.
What is the current size of Castle Trust Bank's loan book?
As of August 2026, Castle Trust Bank holds a specialist property finance loan book of more than £1.1 billion and a retail finance loan book exceeding £200 million.
Will the leadership of Castle Trust Bank change after the acquisition?
No, Castle Trust Bank will continue to be led by its existing management team, including Chief Executive Officer Martin Bischoff, ensuring continuity in strategy and operations.
About the companies
Bayview Asset Management
1 story on FF News since 2026
Omni Capital Retail Finance
Part of Castle Trust Bank · Website · 2 stories on FF News since 2019
Previously on FF News:
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