SYDNEY — The S&P/ASX 200 has shown resilience in the first nine trading days of May 2026, climbing roughly 2.8% despite global volatility, with a handful of standout performers driving much of the gains. As artificial intelligence infrastructure demand, lithium market recovery and technology innovation continue to shape investor sentiment, five companies have emerged as the clear leaders in percentage terms on the benchmark index so far this month.

These top gainers reflect broader themes playing out across the Australian market: the global AI boom's ripple effects on local tech and semiconductor-related firms, renewed interest in critical minerals, and selective strength in healthcare and consumer sectors. Here are the five biggest percentage risers on the ASX 200 from May 1 through May 8, 2026, based on closing prices and market data.

1. BrainChip Holdings (BRN) – Up 68% BrainChip has been the runaway leader, surging more than 68% in early May as its neuromorphic computing technology gained fresh attention from AI developers seeking energy-efficient alternatives to traditional chips. The company's Akida processor, designed for edge AI applications, has secured several new design wins with automotive and industrial clients. Analysts at Bell Potter upgraded the stock citing "strong momentum in the AI edge computing space" and raised their target price significantly. BrainChip's low-power chips are increasingly seen as complementary to larger data center solutions, positioning the company as a niche but high-growth player in the AI supply chain.

2. Lake Resources (LKE) – Up 52% Lithium developer Lake Resources jumped 52% as positive developments in its Kachi Project in Argentina and rising global lithium prices fueled optimism. The company reported strong progress on its Phase One demonstration plant and secured additional........

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