State of New Jersey Common Pension Fund D maintained its stake in Ion Geophysical Corp (NYSE:IO) during the first quarter, according to its most recent 13F filing with the Securities and Exchange Commission (SEC). The firm owned 30,666 shares of the oil and gas company’s stock at the end of the first quarter. State of New Jersey Common Pension Fund D owned about 0.26% of Ion Geophysical Corp worth $149,000 at the end of the most recent reporting period.