ASX AI Stocks: 5 Biggest Companies in 2025

1. NEXTDC (ASX:NXT)

Market cap: AU$6.82 billion
Share price: AU$10.00

NEXTDC is Australia’s leading data centre operator, with 17 functioning centres and at least 12 more in various stages of development throughout Oceania. The company has also forged several business and academic partnerships to enhance Australia's digital infrastructure, including a collaboration with La Trobe Business School’s Research Centre for Data Analytics and Cognition to research theoretical and practical applications of AI across a range of industries.

In August 2024, NEXTDC obtained NVIDIA's (NASDAQ:NVDA) DGX-Ready Data Centre Program certification, enabling it to optimize NVIDIA's AI platforms and power advanced AI data centres in Australia.

The company was also the recipient of the Pacific Telecommunications Council's Outstanding Data Centre Company award for 2025.

In March 2025, NEXTDC's Sydney location upgraded its AXON platform — a system that connects different cloud services and data centers — to offer super-fast 100 gigabits per second connections, which will help businesses use AI technology more effectively by providing the necessary high-speed and reliable links to their data and partners.

2. Megaport (ASX:MPI)

Market cap: AU$1.47 billion
Share price: AU$8.66

Megaport is a software-defined network service provider that allows enterprise customers to connect between data centres. The company offers a marketplace where customers can find and connect with various service providers within the Megaport ecosystem.

The firm's customer base includes cloud service providers like Amazon's (NASDAQ:AMZN) Amazon Web Services and Microsoft's (NASDAQ:MSFT) Microsoft Azure. Megaport's service also allows customers to link their own equipment across different sites and connect to internet exchange points.

Its Megaport Virtual Edge allows the deployment of virtual network devices like routers and firewalls without needing physical hardware in a data centre.

3. NUIX (ASX:NXL)

Market cap: AU$896.29 million
Share price: AU$2.55

Nuix specializes in investigative analytics and intelligence software, with tools to help organizations analyze and understand copious amounts of data using AI. Nuix's Natural Language Processing capabilities allow it to read unstructured formats, including emails and social media posts. Its machine learning algorithms include advanced abilities like semantic search and risk scoring to identify patterns and connections within the data.

Nuix can handle extremely large data sets, and its software is designed to operate at a forensic level, ensuring that data is collected and analyzed in a way that is legally sound and defensible in court. This gives Nuix a significant market share within the law enforcement and legal communities.

4. BrainChip (ASX:BRN)

Market cap: AU$380.77 million
Share price: AU$0.18

BrainChip is the company behind Akida, a revolutionary digital neuromorphic chip that’s built with a spiking neural network, a type of artificial network that mimics the way messages are passed between neurons in the human brain.

Because the AI is inside the chip, the chip can learn on its own and is not reliant on the cloud or other networks. According to the company, this makes it much more secure and reduces latency.

In June 2024, the company released a white paper for its newly developed technology, TENNs-PLEIADES, an efficient AI processor that can perform complex tasks like decision-making, object recognition and data analysis. BrainChip's lowest-power version of the chip, called Akida Pico, was released on October 1 of that year.

Unlike Akida, this chip is designed for spatiotemporal classification and detection using event-based data, making it particularly well-suited for low-latency applications such as self-driving cars.

BrainChip showcased its advancements in event-based vision at Embedded World 2025 and announced a partnership with Information System Laboratories focused on AI-based radar research solutions based on Akida.

5. Weebit Nano (ASX:WBT)

Market cap: AU$333.61 million
Share price: AU$1.46

While Weebit Nano isn't directly developing AI applications or algorithms, its core technology, Resistive Random-Access Memory (ReRAM), is positioned to be a crucial enabler for the future of AI, particularly in the realm of edge AI and neuromorphic computing. ReRAM's low-power operation and potential for high-density make it a promising memory technology for building neuromorphic chips.

Weebit Nano's target markets are heavily driven by AI, such as autonomous vehicles, robotics and advanced Internet of Things devices. As of March 2025, the company is collaborating with companies like Embedded AI Systems to demonstrate the advantage of ReRAM in ultra-low-power applications.

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