When investors think about ASX financial shares, the big four banks usually get most of the attention.
That is understandable. They are large, profitable, and familiar to most Australian investors.
But if I were choosing one ASX financial stock to buy for the long term, I would be looking very closely at Macquarie Group Ltd (ASX: MQG).
It is not the cheapest financial stock on the market. It is not the simplest either. But I think it may be one of the highest quality.
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More than a bank
The first thing I like about Macquarie is that it is much broader than a traditional bank.
Yes, it has a fast-growing retail banking operation. But it also has major businesses in asset management, commodities, global markets, investment banking, private credit, infrastructure, and specialist investing.
That gives Macquarie a very different earnings profile to the major banks.
A traditional bank is heavily exposed to mortgages, deposits, net interest margins, credit growth, and bad debts. Macquarie has exposure to those things through Banking and Financial Services, but it also has several other engines that can contribute in different market environments.
For me, that is the main attraction.
Macquarie is a financial stock with genuine global reach and multiple ways to grow.
The latest result supports the quality case
I would not buy Macquarie purely because of one result, but its recent FY26 numbers do support the long-term thesis.
The group reported a net profit of $4.85 billion for FY26, up 30% on FY25. Its second-half profit of $3.19 billion was a record half-year result.
That shows the business still has plenty of earnings power.
What I find particularly attractive is the spread of contributions across the group. Macquarie Asset Management, Banking and Financial Services, Commodities and Global Markets, and Macquarie Capital all delivered higher net profit contributions in FY26.
That does not mean every year will be smooth. Macquarie's earnings can move around, especially in its market-facing businesses. But I would rather own a company with several growth engines than one relying on a single source of profit.
Structural growth themes
Another reason I like Macquarie is its exposure to long-term trends.
The company is active in areas such as private markets, infrastructure, energy, commodities, digital banking, private credit, and specialist financing.
These are not small themes.
Infrastructure investment remains important globally. Energy markets are becoming more complex. Private capital continues to grow. Digital banking is taking share from older models. Companies still need specialist advice, capital, risk management, and financing solutions.
Macquarie is positioned across many of these areas.
That gives it a chance to keep finding opportunities over the long term, even as conditions change.
The balance sheet matters
Financial stocks can look attractive when markets are strong, but balance sheet strength is what matters when conditions become more difficult.
This is another area where Macquarie stands out to me.
At the end of FY26, the group reported a Bank Group CET1 ratio of 12.8%, a liquidity coverage ratio of 173%, and a net stable funding ratio of 116%. It also reported total deposits of $221.5 billion, up 25% over the year.
I think that conservative positioning is important.
It gives Macquarie flexibility to support growth, manage volatility, and move when attractive opportunities appear.
Is it the best ASX financial stock to buy?
I think Macquarie has a strong claim.
Commonwealth Bank of Australia (ASX: CBA) is arguably the highest-quality traditional bank on the ASX. But Macquarie offers something different.
It gives investors exposure to a global financial platform, not just an Australian banking franchise.
The trade-off is that Macquarie can be harder to value, and its earnings may be less predictable from year to year. The shares also rarely look obviously cheap when investors are confident in the business. But quality doesn't usually come at a bargain price.
