Bigtincan is the latest software company to find itself on the receiving end of an opportunistic takeover bid, disclosing a $442 million unsolicited bid from one of its largest shareholders.

SQN Investors, a California-based long/short equities investment adviser and private equity fund with a focus on tech companies where company director Farouk Hussein is a partner, already owns about 13.6 per cent of Bigtincan. On Friday it was revealed the investor had lobbed an 80¢-per-share, conditional, non-binding offer.