Biggest ASX market cap gains and falls, in dollars
Market cap is shares on issue multiplied by the share price, so a 4% week at a large producer can be worth far more money than a 60% week at a small explorer. These boards rank ASX mining and healthcare companies by the dollars their market cap moved over the week, the month, the quarter and the year — not by percentage, which the home page already shows.
Every window on these boards rolls. Each one counts back from the most recent close: the weekly board is the last 5 trading days, the monthly board is the last 21 trading days, the quarterly board is the last 63 trading days, the yearly board is the last 250 trading days. They are not calendar weeks, months, quarters or years, so every board moves on by a day at each close.
Open any company for its news-flow record — every market-sensitive announcement it has filed this year, against its price. Or press Chart on a row for its price chart, delayed 15 minutes.
* 22% of the figures here are measured against a dated share count from the start of their window; the rest (marked *) are measured on today’s count. We started recording each company’s share count every trading day on 17 August 2026, so the record is still building out — the quarterly board is covered from about November 2026 and the yearly from about August 2027.
Measured across 1,047 ASX mining and healthcare companies; 781 had a share count at this close.
Not financial advice.Catalyst Ahead is an AI-driven research tool. All projections are inferences from public company announcements. AI-derived inferences from company announcements. Always do your own research and consult a licensed adviser before trading.