Housing loan books total $2.18 trillion for top 10 lenders in September, Macquarie competes with majors

The Australian Prudential Regulation Authority’s (APRA) report tracking the top Authorised Deposit-Taking Institutions (ADIs) has been released for September 2025. 

Agile Market Intelligence plots the monthly loan books and movements across the top 10 ADIs, with majors maintaining the largest share. Macquarie, in particular, shows positive steady expansion with the possibility of challenging the Big 4 in terms of variance growth. In addition, several non-major entities are showing the potential for gradual expansion after a recent period of slowed growth. 

Key stats you need to know

• The top 10 housing ADIs’ loan books reached $2.18 trillion in total for September 2025.

• The big four occupy 80% of the total loan book share, with Macquarie and ING combined occupying half of the remaining total.

• Business lenders have witnessed improved loan book growths, however only 7 out of the top 10 lenders have seen positive growth. 

Macquarie continues to challenge the big four in loan book growth

• CBA has increased its housing loan book value at $603.1B, with a growth variance at $4.05B.

• Macquarie outpaces 3 of the 4 majors in loan book growth variance at $3.20B.

Macquarie continues to be a contender to the big four, having consistent positive growth culminating in a loan book share rate at 2.13%. This number is triple the growth rate of the top housing loan entity, that is CBA at 0.68%. Macquarie’s performance, alongside ING (1.18%) and HSBC (0.87%), also surpasses the other 3 majors, with a growth variance of 0.37% for Westpac, 0.38% for NAB, and 0.31% for ANZ. ‍

Top ADIs portfolios expanding at slower rates, hints at recovery

• Majors have shown a minimum 0.30% growth variance increase in September. 

• Mid-tier ADIs show signs of potential recovery from contractions earlier in the year.

• Macquarie, ING, and HSBC have shown a variance growth rate of 0.80% and above.

Across the top housing lenders entities that saw slow growth in the previous months, a resurgence is occurring across both major and non-major ADIs. CBA and Westpac have grown by a variance rate of 0.68% ($4.05B) and 0.37% ($1.83B), a trend mirrored by non-major companies such as Macquarie, ING, and HSBC. Furthermore, other non-majors are showing potential for positive increases, as is the case for Bendigo and Adelaide, and Suncorp at -0.06% and -0.02%, respectively. 

About the report

The figure in this article was drawn by Agile Market Intelligence from APRA’s monthly ADI statistics to September 2025. The dataset covers total housing loans 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, a monthly survey of residential and commercial mortgage lenders. It is a community-driven knowledge base of lender performance that offers transparency to the market by surfacing these collective insights from the broker community. This empowers brokers to make informed decisions and enables lenders to benchmark and improve performance.