OQ, the national oil company of Gulf producer Oman, plans to put more of its subsidiaries up for stock listing, following the record-breaking IPO of its OQ Exploration and Production Company earlier this year, a senior executive told Bloomberg in an interview. In October, OQ Exploration and Production Company (OQEP), Oman’s wholly-state-owned upstream oil and gas operator, raised $2.03 billion from its IPO which was the largest ever for the Gulf oil nation and the biggest in the region so far this year. OQEP sold 2 billion shares in the IPO…