Irvine-based Opus Bank posted $10.3 million in profit in the second quarter, down about 45% from the same period last year.

The decrease in earnings was driven largely by higher income-tax expenses in the recent quarter.

Opus had $37.5 million in net interest income, up about 3% from a year earlier.

Noninterest income, including fees and gains on asset sales, totaled $4.1 million, down about 41% year-over-year.

Opus remains the largest bank with headquarters in Orange County, with about $4.3 billion in assets, versus $3.2 billion a year earlier.

Loan growth helped drive the bank’s total assets. Opus had about $339 million in loan originations in the quarter, pushing its total loans to about $3.4 billion as of June 30. That’s up about 43% year-over-year.

The value of nonperforming assets fell about 21% to $13 million over the past year.

Opus had $3.2 billion in deposits at the end of the quarter, up about 37%.

The bank debuted on the Nasdaq exchange in April via an initial public offering, notching $80.3 million in net proceeds to stockholders’ equity.

Opus stock is about flat Monday morning, at a market capitalization value of about $831 million.