Altium shareholders are staring down a major payout after a surprise $9.1 billion takeover bid from Japan’s Renesas – but fund managers are also lamenting another loss to the dwindling number of quality tech names on the ASX.

The $68.50-a-share bid was backed by the board of the San Diego-based group minutes before the sharemarket opened on Thursday. The shares soared almost 30 per cent to a record high above $65.