Principal Financial Group Inc. announced first-quarter operating earnings of $317.1 million, a 36 percent increase from the first quarter of 2013. Net income available to common stockholders for the first quarter of 2014 increased 65 percent to $293.7 million, or 95 cents per share, compared with $178.3 million, or 61 cents per share, for the year-ago period. A dividend of 32 cents per share of common stock for the second quarter was authorized by the board, a 14 percent increase from the first quarter's dividend. Record total company assets under management were $495.5 billion, up 9 percent over the year-ago quarter. "We continue to benefit from the diversification of our business model as well as the successful execution of our investment management strategy, allowing us to meet the growing global need for financial security," said Larry Zimpleman, Principal's chairman, president and CEO.