The top 10 business loan books total $0.9 trillion, Bank of China sees 4.26% growth

According to the Australian Prudential Regulation Authority (APRA), the top ten Authorised Deposit-Taking Institutions (ADIs) reached a combined $937 billion loan book in September 2025. Agile Market Intelligence has plotted the publicly available APRA data to visualise movements in the leading market, revealing that the Bank of China and other midtiers have driven growth in the past month.

Key stats you need to know

• The top 10 non-financial ADIs’ loan books totalled $937 billion for September 2025

• Bank of China showed the strongest percentage growth rate the past month at 4.26%, outpacing traditional Australian lenders.

• Nine out of 10 business lenders saw positive growth for the month. 

Majors see slow growth in September 2025

• The National Australia Bank has reached the largest sum of non-financial business loans at $252.69 billion.

• Westpac had the most growth variance at $3.32 billion across the board. 

• The 4 majors occupy over 85% of the total loan book share.

Three of the majors showcase positive growth variance in September, namely Westpac (1.76%), CBA (0.73%) and NAB (0.65%). Their business loan books are valued in billions at $191.56, $219.09, and $252.69 respectively. By contrast, ANZ contracted by -0.56%, the only lender to do so in the top ten. Despite this contraction, ANZ’s loan book is valued at $149.63 billion, more than quadruple the value of the next bank in the ranking, that is SMBC at $26.18 billion. While Westpac is expanding its portfolio, and ANZ is contracting, the rest are stagnating for the time being. 

International banks reveal steep positive growths

• Bank of China, Bendigo Bank and Adelaide Bank show faster growth percentage than the 4 majors.

• Japanese lender Sumitomo Mitsui Banking Corporation has the largest loan book among the mid-tiers, valued at $26.18 billion.

• All midtiers showcase positive growth in September 2025.

Two mid-tier lenders, namely Bank of China and Bendigo and Adelaide, have outpaced the 4 majors with steep growths at 4.26% and 2.37%, respectively. In the same month, Sumitomo Mitsui (1.53%) and MUFG (1.58%) outpaced 3 Majors, with Rabobank and Macquarie following with moderate growths at 0.35% and 0.22%, respectively. All six mid-tiers showed positive growth, with some recovering after a brief contraction period.

About the research

The figure in this article was drawn by Agile Market Intelligence from APRA’s monthly ADI statistics to September 2025. The dataset covers total loans to non-financial businesses across Authorised Deposit-Taking Institutions (ADIs). For this analysis, Agile plotted publicly available data to show movements in loan books and market share to identify the top 10 business lenders.

Agile Market Intelligence also conducts Broker Pulse: Commercial Lending, a community-driven benchmarking initiative capturing the experiences of commercial and asset finance brokers across Australia. The report includes data across asset finance, business loans, and commercial mortgages, and is conducted by Agile Market Intelligence.