The potential deal is the latest sign of consolidation after the start of merger talks in 2013 between Bank Dhofar and Bank Sohar.
The lender said last month that it was mulling options for raising up to $300 million of capital at the earliest opportunity.
The proposed cash amount, for which no timeframe was given but which is in line with what the company paid for the second half of 2013.
Antimony trioxide is mostly used as a flame retardant and a catalyst in the production of plastics.
The former monopoly made a net profit of 26.5 million rials ($68.8 million) in the last quarter of 2014.
United Finance said in a bourse statement that it would consider Bank Nizwa’s merger proposal when its board next met.
United Finance describes itself as Oman’s largest non-bank financial institution.
The company made a profit of OMR6.55 million($17.0 million) in the last quarter of 2014.
Saudi Arabia and Qatar were the biggest contributors, committing $25 million and $10 million respectively to Gavi Alliance.
NBO, earlier in January, posted a 29 per cent rise in fourth-quarter net profit, beating estimates.
The bonus shares will be paid out in the proportion of one share for every 20 ordinary shares held, the lender said.
The firm made a net profit of OMR8.3 million ($21.6 million) in the last quarter of 2014.
The bank’s proposed 2014 dividend is equivalent to $0.03 per share in cash and one free share for every 10 a shareholder owns.
The consortium, led by Canada-based CPCS Transcom International Limited, will start the study this month.
The maintenance is not expected to have any effect on the local market, ORPIC’s CEO said.
The contract was worth about 207 million pounds when won in 2011.
A Tier 1 capital-boosting bond was its preferred method, the bank said.
The minister said that OPEC’s policy might temporarily force high-cost producers out of the market but they would eventually come back.
Lower oil prices are not affecting Oman’s upstream strategy, and there is no change in its 2015 energy plans, the minister said.
Bank Muscat made a profit of OMR36.5 million ($94.8 million) in the last quarter of 2014.
The firm made a net profit of OMR1.7 million ($4.4 million) in the last quarter of 2014.
Wednesday’s 4.5 per cent surge in Brent crude futures was the biggest percentage gain since June 2012.
Net profit for the full year was down 30.6 per cent year-on-year to OMR40.5 million.
Net profit in 2014 was OMR163.2 million, up 7.3 per cent from the previous year.
The lender made a net profit of OMR13.2 million ($34.3 million) in the fourth quarter of 2014.
ORPIC runs oil refineries at Sohar and Muscat as well as aromatics and polypropylene production plants at Sohar.
The minister said on Wednesday that the Oman’s budget assumed oil prices would average $75 per barrel this year.
The new plan aims to reduce the total expenditure of the airline by more than OMR100 million over the next three years.
Government expenditure this year is estimated at OMR14.1 billion ($36.6 billion), up 4.5 per cent from last year’s original plan, the ministry said.
A news conference on the budget was scheduled to be held at 10 a.m. local time.