PPT, MQG (high of $98.64) and COH were racing to become the first $100 stock on the ASX back in the days…
But if you take recapitalisation/dilution into account, you will see that there are shares with hisotrical highs that looked absolutely incredible.
e.g. ELD trading at 24c used to worth $28 a share. PGA @ 6c used to worth $6.15. VPG was takenover at $1.75 having traded at $42. HST used to be worth $40+. But the best I can think of is PIH (the old Babcock & Brown infrastructure) was takenover at $4.90 but had a pre-recapitalisation high of $243.