RAPID CITY (AP) -- Black Hills Corp. (BKH) on Tuesday reported first-quarter profit of $96.3 million.

On a per-share basis, the Rapid City, S.D.-based company said it had net income of $1.54.

The energy company posted revenue of $633.4 million in the period.

Black Hills shares have increased 12% since the beginning of the year. In the final minutes of trading on Tuesday, shares hit $68.65, a rise of 15% in the last 12 months.