A $20,000 investment gives investors enough room to spread their money across a few high-quality ASX 200 shares.
I would want that money working across different parts of the market. That means avoiding three companies with the same drivers and instead looking for a mix of growth, financial exposure, and global opportunity.
Three ASX 200 shares I would consider buying with $20,000 are named in this article.

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Breville Group Ltd (ASX: BRG)
The first ASX 200 share I would buy is Breville. It has built a premium consumer brand across kitchen appliances, with coffee machines at the centre of its global growth story.
I think the company is interesting because it is selling into a habit that can be very sticky. Coffee is part of many people's daily routines, and consumers are increasingly willing to spend on better at-home equipment if it improves the experience.
That gives Breville a useful position. Its products are designed to sit in the premium end of the market, where brand, performance, design, and customer trust are important.
The growth opportunity is also global. Breville already has a strong presence in several markets, but I think there is still room to expand its brand awareness, product range, and direct distribution over time.
There are risks. Consumer spending can weaken, tariffs can affect margins, and premium appliances are not immune to economic pressure.
But if Breville keeps building its brand and winning more households internationally, I think it could be a much larger business in a decade.
Netwealth Group Ltd (ASX: NWL)
The second ASX 200 share I would consider is Netwealth. It operates an investment platform used by financial advisers and their clients. It helps with portfolio administration, reporting, investment access, and client management.
I like this business because it sits inside one of Australia's most important long-term financial trends: the growth of personal wealth.
Australia has a huge pool of superannuation and investment assets. As more people approach retirement, inherit wealth, or seek professional advice, technology becomes increasingly important in managing that money efficiently.
Netwealth has built a strong reputation in the independent platform market. Advisers want systems that are easy to use, flexible, and reliable. Clients want better visibility over their investments.
That creates a good backdrop for Netwealth if it can keep winning flows and deepening adviser relationships.
The share price can be sensitive to market conditions because funds under administration can rise and fall with asset prices. Competition is also strong. But I think Netwealth has the kind of scalable model that can reward long-term investors if it continues taking share.
Macquarie Group Ltd (ASX: MQG)
The third ASX 200 share I would buy is Macquarie Group.
Macquarie is one of the most impressive financial businesses on the ASX in my view.
It is not a simple bank. It has operations across asset management, commodities and global markets, banking and financial services, and investment banking.
That gives Macquarie several ways to make money.
Some parts of the business can benefit from infrastructure investment. Others are exposed to commodities, energy transition, private markets, deal activity, and global capital flows.
I think that flexibility is one of the reasons Macquarie has created so much value over time.
Earnings can be uneven from year to year, and the share price can pull back when markets are weak or when deal activity slows. But I see Macquarie as a long-term compounder with a strong culture, global reach, and a proven ability to move capital into attractive opportunities.
Foolish Takeaway
I think this mix would give me exposure to three very different long-term stories.
Breville offers global brand growth, Netwealth gives exposure to the expanding wealth management platform market, and Macquarie adds a diversified financial business with global reach.
That is a useful spread for a $20,000 portfolio.
There will be weaker periods for all three shares, and valuation should still be watched. But if I were investing for the next five to 10 years, I would be happy to let these businesses work away in the background.