Quindell has suspended trading in its shares on Aim "pending an announcement", it said today.
The London Stock Exchange issued a notice saying it had taken the decision to cancel 126 trades made between 9.40am and 9.42am, equating to a volume of 403,512.
Shares in the troubled insurance outsourcer jumped more than 30 per cent on Monday, after it announced the sale of its legal services division to Slater & Gordon. The division accounts for 90 per cent of the company.
Yesterday, shares in Daniel Stewart, a broker that has worked with Quindell in the past, were catapulted up by 750 per cent after founder and former chaiman Rob Terry - who left the company last year - bought shares in the company, taking his total stake to 7.4 per cent.
It follows a turbulent few months for Quindell.
Almost exactly a year ago, mysterious US short seller Gotham City Research published a note accusing the company of having "magical... paper profits". Following the Slater & Gordon deal this week, it made further allegations on its Twitter feed.