SINGAPORE (April 3): IPCO International says Quah Su Ling has resigned as CEO and executive director to focus on her "present personal challenges".

Her last day with the company was March 31.

Quah, 50, who became IPCO's CEO in 2003, had her assets frozen in 2013 by a court order sought by US-based Interactive Brokers following a huge penny stock crash in October that year.

She was one of more than a handful of clients Interactive Brokers had sought legal action against to recover millions of dollars of losses stemming from the share-price collapse of Asiasons Capital, Blumont Group and LionGold Corp.

Quah was also embroiled in a legal spat in London with Goldman Sachs, which she sued in November 2013 for allegedly dumping her shares in these companies just before the Oct 4 crash. She had pledged her stocks in these companies as collateral for loans from Goldman to buy more shares.

Goh Hin Calm, IPCO's senior finance and administration manager, has been appointed interim CEO.

IPCO, an investment holding company with interests in natural gas distribution, real estate development and semiconductor equipment, was told by police in April last year to help with investigations into an offence under the Securities and Futures Act.