
September could be a good time to put some fresh money to work on the S&P/ASX 200 index (ASX: XJO).
But where should you invest?
I would be looking for high-quality businesses with strong market positions and plenty of room to grow over the long term.
With that in mind, here are three ASX 200 shares I think could be top buys this month.
Goodman Group (ASX: GMG)
Goodman could be one of the best ASX 200 shares to buy in September.
The integrated property company has built a global platform around industrial real estate, with warehouses, logistics facilities, and large-scale development sites across major markets.
That alone is a strong business. But arguably the most exciting part of the story is what Goodman is doing with data centres.
Artificial intelligence (AI) and cloud computing are driving huge demand for computing infrastructure, and data centres need land, power, planning approvals, and access to major population centres.
These are all areas where Goodman has an advantage. The company already has deep customer relationships, a strong development pipeline, and experience working with large industrial sites.
I think that gives Goodman a good chance of becoming an even more important infrastructure player over the next decade.
ResMed Inc (ASX: RMD)
ResMed is another ASX 200 share I would consider buying this month.
It is a global medical device leader with a focus on treating sleep apnoea and other respiratory conditions through masks, software, and connected healthcare products.
The long-term opportunity remains extremely large. Millions of people around the world suffer from sleep-related breathing problems, and many have not yet been diagnosed or treated.
In fact, the company estimates that there are over 1 billion people suffering from sleep apnoea, potentially giving ResMed a multi-decade growth runway.
Xero Ltd (ASX: XRO)
A third ASX 200 share to buy in September could be cloud accounting software company Xero.
It has built a platform that helps small businesses and accountants manage invoicing, payroll, reporting, bank feeds, payments, and other financial tasks.
And while AI may change how accounting work is done, Xero is not a narrow tool that can be easily replaced by one feature. Instead, AI could help automate more of the work already taking place across its platform.
Xero also has a large opportunity in markets such as the United States, where its market share remains low.
Its shares can be volatile, but I think the company has a very strong long-term growth outlook.
The post Top 3 ASX 200 shares to buy in September appeared first on The Motley Fool Australia.
Should you invest $1,000 in Goodman Group right now?
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* Returns as of 1 August 2026
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Motley Fool contributor James Mickleboro has positions in Goodman Group, ResMed, and Xero. The Motley Fool Australia’s parent company Motley Fool Holdings Inc. has positions in and has recommended Goodman Group, ResMed, and Xero. The Motley Fool Australia has positions in and has recommended ResMed and Xero. The Motley Fool Australia has recommended Goodman Group. The Motley Fool has a disclosure policy. This article contains general investment advice only (under AFSL 400691). Authorised by Scott Phillips.