Seems like speculation every day at the moment but some have played out.

"It’s been more down than up for the ASX in the last few years. That’s not the index, but the market operator, which seriously bungled the roll-out of a crucial upgrade of clearance and settlement systems, resulting in more than casual regulatory scrutiny.

That, and generally poor conditions for new listings since the COVID-19 pandemic, have resulted in a weak share price. Over five years, in fact, it’s down some 14 per cent.

But ASX Limited is still attractive to someone, it seems. Street Talk can reveal a consortium of superannuation funds, including industry giants and major shareholders AustralianSuper and UniSuper, seriously considered lobbing a takeover bid only late last year." per AFR