Challenger Banks
1,118
debentures in May 2026
+4%
vs May 2025
Note: this report covers major lenders tracked in the Spark Intel dataset.
May 2026 - Year-over-year
Lenders
Challenger Banks
7 major lenders| Lender | 2023 | 2024 | 2025 | 2026 | Chg | YoY |
|---|---|---|---|---|---|---|
| Aldermore Bank | 144 | 407 | 610 | 626 | +16 | +3% |
| Shawbrook Bank | 211 | 233 | 292 | 271 | -21 | -7% |
| Allica Bank | 64 | 98 | 84 | 118 | +34 | +40% |
| Atom Bank | 20 | 47 | 32 | 28 | -4 | -13% |
| OakNorth | 118 | 24 | 18 | 25 | +7 | +39% |
| Oxbury Bank | 15 | 11 | 29 | 26 | -3 | -10% |
| GB Bank | 2 | - | 8 | 24 | +16 | +200% |
| Cohort total | 1,073 | 1,118 | +45 | +4% | ||
Source: Companies House debenture filings, May 2026. Figures represent registrations in the calendar month only.
May 2026 Market Commentary Available
Read the full CCO commentary on May 2026 UK debenture registrations - covering the continued buy-to-let surge, SME loan provider spike, and year-to-date trends.
View May 2026 Overview →