Australian Block Market Share report – June 2025
With the expertise of our Quantitative Analytics team, we compile a monthly report on Australian block market share – to give consistent and transparent data to share key insight in the Australian market.
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The ASX 200 rose 1.28% in June in a modestly constructive push higher, supported by easing geopolitical tensions, continued evidence of the TACO phenomenon, resilient earnings, renewed enthusiasm for AI and tech, and favourable expectations around the Federal Reserve. However, quality was lacking, with narrow breadth and elevated valuations remaining key concerns.
Domestically, June typically sees heightened market activity ahead of EOFY, this year especially so. Block activity and overall turnover were notably strong, and the IPO window opened slightly—further lifting sentiment. The S&P/ASX 200 VIX (average daily value) declined to 11.1 from 11.9 in May.
Block trading remained elevated in June, driven by EOFY dynamics:
Daily block turnover averaged $762 million, up 24% versus the 12-month average.
Blocks accounted for 8.1% of total turnover, compared to the 12-month average of 7.4%.
Block trade count rose 9.1% to 179 per day, versus a 12-month average of 164.
Three trading days saw block totals exceed $1 billion.
UBS had a very dominant month with 18.3% market share, taking the number 1 spot in in mega, mid and micro caps and looked to be particularly active in the transitions. Barrenjoey were consistently strong, MQG also – benefitting from the transition activity. Market share concentration increased, with the top 10 accounting for 87.5% of block market share (vs a 12mth average of 83.7%).
Methodology
We have used ASIC definitions of a block (according to Tiers) instead of an arbitrary dollar value, and then cleaned the data by only incorporating blocks between 10:00 - 16:11. Any blocks done at PDC or open prices are also excluded. ETF trades are excluded.
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