The S&P/ASX 200 Index (ASX: XJO) is on course to start the week with a small gain. In afternoon trade, the benchmark index is up 0.2% to 8,987.3 points.

Four ASX shares that are rising more than most today are listed below. Here's why they are storming higher:

Aussie Broadband Ltd (ASX: ABB)

The Aussie Broadband share price is up 19% to $5.31. This follows the release of the broadband provider's full year results this morning. Aussie Broadband posted an 18.7% increase in revenue to $1,187.1 million and a 14.7% lift in underlying EBITDA to $138.2 million. The latter was at the top end of its guidance range. Looking ahead, management expects further growth in FY 2026 and is forecasting underlying EBITDA of $157 million to $167 million. This represents growth of 14% to 21%.

Kogan.com Ltd (ASX: KGN)

The Kogan share price is up over 3% to $4.16. Investors have been buying the ecommerce company's shares following the release of its FY 2025 results. Kogan posted a 6.2% increase in revenue to $488.1 million but an 8% decline in adjusted EBITDA to $36.8 million. This represents an adjusted EBITDA margin of 7.5%. Management is guiding to a potential improvement in this metric in FY 2026, with a target of 6% to 9%. And longer term, it is aiming for greater than 20%.

Pilbara Minerals Ltd (ASX: PLS)

The Pilbara Minerals share price is up 3% to $2.18. This morning, this lithium giant released its FY 2025 results and reported revenue of $769 million and underlying EBITDA of $97 million. While both were down sharply year on year, they appear to have been better than feared. Commenting on the result, Pilbara Minerals CEO, Dale Henderson, said: "FY25 marked a transformational year for PLS. While the lithium market experienced material pricing pressure, we maintained strong operational performance, completed a major phase of capital investment, and positioned the business for the next phase of growth." It is also worth noting that a number of lithium stocks are charging higher today following a strong finish to last week for their peers on Wall Street.

Polynovo Ltd (ASX: PNV)

The Polynovo share price is up over 8% to $1.19. This has been driven by the release of the medical device company's FY 2025 results. It reported a 28.9% increase in sales to $118.6 million and a 151.2% jump in net profit after tax to $13.2 million. Acting CEO, Dr Robyn Elliott, said: "FY25 has been a successful year with significant growth in all major indicators: patients treated, units sold, revenue, profit and regulatory approvals. I thank our staff for their dedication and look forward to FY26, as we drive the commercial roll out of MTX and deliver increased value and positive outcomes for all our stakeholders."