Artificial intelligence (AI) has quickly shifted from being a future theme to something that is actively reshaping industries today. What I find most interesting is that the opportunity is not limited to the obvious global tech giants. There are ASX shares quietly building the infrastructure that helps make AI possible. If I were looking to lean into this trend, these are three ASX shares I would be paying close attention to. Image source: Getty Images NextDC Ltd (ASX: NXT) When I think about AI, one of the first things that comes to mind is data. Not just the algorithms or the models, but the physical infrastructure required to store, process, and move enormous amounts of information. That is where NextDC fits in. The company operates high-performance data centres, which are becoming increasingly critical as demand for cloud computing and AI workloads continues to grow. What stands out to me is the scale of its expansion. The company has been investing heavily in new capacity, and its growing forward order book suggests that customers are already lining up for that infrastructure. AI workloads are not lightweight. They require power, connectivity, and proximity. Data centres sit right at the centre of that ecosystem. For me, NextDC is less about short-term profitability and more about positioning. If AI demand continues to rise, I think the importance of high-quality data centre operators only increases. Megaport Ltd (ASX: MP1) If NextDC is about where data lives, Megaport is about how it moves. Megaport provides network-as-a-service, allowing businesses to connect quickly and flexibly to cloud providers, data centres, and other services. In an AI-driven world, that connectivity becomes even more important. Training models, running applications, and distributing results all rely on fast, scalable networks. The more complex and data-intensive the workloads become, the more valuable that connectivity layer is. What I find interesting here is how the company is expanding its capabilities. Its recent push into adjacent areas like compute and GPU-as-a-service suggests to me that it is trying to capture more of the AI value chain, not just the networking component. It is still a business that is proving itself in some respects. But if it executes well, I think it has the potential to benefit meaningfully from the growth in AI-driven demand. Goodman Group (ASX: GMG) Industrial property company Goodman is not always the first name people think of when it comes to artificial intelligence. But I think it arguably should be. The company has been increasingly focused on developing data centres alongside its more traditional logistics assets. And those data centres are becoming a critical piece of AI infrastructure globally. Something that stands out to me is the scale and positioning of its development pipeline. With a significant portion of its work in progress now tied to data centres, Goodman is effectively building the physical backbone required for the digital economy. It also has something that I think is underappreciated. Access to land, power, and capital in key global cities. These are not easy assets to replicate. And as demand for data centre capacity grows, those constraints could become even more important. For me, Goodman offers a slightly different way to play the AI theme. It is less about technology itself and more about the infrastructure that supports it. Foolish takeaway If you are bullish on artificial intelligence, I do not think you need to limit yourself to the obvious names overseas. From data storage to connectivity to physical infrastructure, NextDC, Megaport, and Goodman Group each provide exposure to different parts of the AI ecosystem. When I think about where the long-term demand is heading, these are the kinds of businesses I find myself drawn to.