Castle Trust Bank has been acquired by vehicles backed by Sixth Street and Bayview Asset Management, with the two firms taking equal stakes in the specialist lender. The deal marks an exit for J.C. Flowers & Co, the financial-services-focused private equity firm that has backed the bank through a period of material balance-sheet growth.
Castle Trust Bank chief executive Martin Bischoff will remain in post, and the wider management team is expected to continue in place. As part of the transaction, Sixth Street and Bayview have committed additional capital to support growth, though the release did not disclose the deal price, the size of the new capital commitment, or a timeline for deployment.
The balance sheet at acquisition
The release includes the clearest set of financial disclosures. Castle Trust Bank has accumulated retail savings balances exceeding £1.6 billion, a specialist property finance loan book of more than £1.1 billion, and a retail finance book through its Omni Capital Retail Finance subsidiary that surpasses £200 million. That gives the business roughly £2.9 billion in combined deposit and lending exposure across three product lines: Cash ISA and savings accounts, specialist bridging and term mortgages, and point-of-sale retail finance.
Bayview brings approximately $44.7 billion in assets under management with a focus on residential, commercial and consumer credit, including mortgage servicing rights and asset-backed securities. Sixth Street manages more than $135 billion in assets under management and committed capital. Both acquirers describe an appetite for asset-based finance with a long-term horizon, which aligns with Castle Trust Bank’s book-built model rather than a higher-velocity fintech scaling play.
Masashi Washida, managing director for asset-based finance at Sixth Street, said the bank’s leadership and its technology platform “create a strong foundation for sustainable growth and scalable operations at an attractive time in the market.”
Sector and regulatory context
The acquisition sits inside a broader pattern of institutional credit managers acquiring or recapitalising mid-sized UK specialist lenders. Rising interest rates over the prior cycle improved net interest margins at savings-funded institutions but also tightened affordability in the specialist mortgage market. With the rate cycle now turning, acquirers with long-duration capital are positioning to grow loan books at what they characterise as an attractive entry point in the credit cycle.
Castle Trust Bank received its banking licence from the Prudential Regulation Authority in June 2020, converting from an investment firm structure. Its regulated status means the change of control will have required PRA and Financial Conduct Authority approval before announcement, a process that typically involves scrutiny of the acquirers’ fitness and propriety and, where relevant, their capacity to inject capital under stress.
The Omni Capital Retail Finance business, acquired by Castle Trust in 2017, adds a consumer credit dimension that sits under FCA consumer-duty obligations introduced in 2023. Any expansion of product lines or customer volumes in that channel will require the new owners to demonstrate compliance with the consumer-duty framework’s outcomes-focused requirements.
The bank did not indicate whether it intends to seek further inorganic growth through loan portfolio acquisitions or whether any product expansions will require additional regulatory permissions.
