When I look for opportunities in the ASX 200, I tend to focus on shares with clear growth pathways and expanding market opportunities.
That usually leads me toward companies that are building platforms, scaling globally, or reshaping their industries.
Here are three ASX 200 shares that stand out to me right now.
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Xero Ltd (ASX: XRO)
Xero is evolving into something much bigger than accounting software.
At its core, it sits on top of financial data for millions of small businesses. That position creates a powerful foundation for expanding into adjacent services and delivering more value over time.
What I find particularly interesting right now is how the company is leaning into artificial intelligence (AI).
According to its recent investor briefing, Xero sees the long-term opportunity expanding its total addressable market by around four times as AI capabilities are layered into its platform.
That shift changes how I think about the business. It moves beyond subscription accounting software and toward a broader system that helps businesses make decisions, automate processes, and improve performance.
On top of that, the integration with Melio is opening up a large US payments opportunity, which adds another growth driver.
I think Xero is building a platform that can continue to expand its reach and relevance over time.
Hub24 Ltd (ASX: HUB)
HUB24 is benefiting from structural change within the wealth industry.
More advisers are moving toward platform-based solutions, and HUB24 continues to capture that shift.
What stands out is the pace at which the business is scaling. In its latest results, platform funds under administration reached $152.3 billion, supported by record net inflows of $10.7 billion in the half.
That growth reflects strong demand from advisers and ongoing market share gains.
But it isn't settling for that. HUB24 continues to invest in new solutions, including an emerging ecosystem that leverages AI and integrated tools to improve adviser productivity.
For me, this is a business where growth is driven by both industry tailwinds and continued innovation within its platform.
Sigma Healthcare Ltd (ASX: SIG)
Sigma Healthcare is another ASX 200 share I think could be a best buy. It is shaping into a very different business following its merger with Chemist Warehouse.
It now combines wholesale distribution with a large and growing retail network, which creates a broader and more scalable model.
The recent first-half results highlight how that combination is performing. Revenue increased 15% to $5.5 billion, with strong growth across both domestic and international markets, supported by expanding store networks and increasing demand.
What I find attractive is the runway ahead. The company continues to open new stores, expand its private label offering, and drive efficiencies through scale.
Overall, I think Sigma is transitioning into an integrated healthcare platform with multiple ways to grow.
Foolish takeaway
What stands out to me is how each of these businesses is expanding its opportunity set.
Xero is building a broader platform around financial data and AI, Hub24 is scaling alongside structural growth in platform-based investing, and Sigma Healthcare is strengthening its position across retail and distribution.
That ongoing expansion is what I look for when identifying high-quality ASX 200 shares to buy now.
