Ann: S&P DJI Announces March 2021 Quarterly Rebalance, page-6

Just for information:

Betashares launched an ETF which tracks this index, the BetaShares S&P/ASX Australian Technology ETF. It can be bought and sold on the ASX using the ticker code ATEC. ATEC aims to replicate the XTX index by holding all stocks in the index. So they will also be a buyer.

The present holdings and weightings can be found on their website;

https://www.betashares.com.au/fund/sp-asx-australian-technology-etf/

Just scroll down to holdings and click on 'all'.

I'll leave it to someone else to work out how many shares the two funds are likely to end up holding between them.