EMC Insurance Group Inc. today reported third-quarter operating income of $6.55 million, or 50 cents per share, which compares with $8.44 million, or 65 cents per share, for the third quarter of 2012. Net income for the Des Moines-based property/casualty insurer, including realized investment gains and losses, totaled $7.2 million, or 55 cents per share. However, operating income for the first nine months of 2013 was up 26 percent to $25.2 million compared with the same period in 2012. That exceeded management's expectations at the beginning of the year, EMC President and CEO Bruce Kelley said in a release. As a result, he said, the company has revised its 2013 operating income guidance from the previous range of $2.40 to $2.65 per share to a revised range of $2.60 to $2.85 per share. Operating earnings benefited in part from higher premiums charged, but were negatively impacted by higher catastrophe and storm losses totaling more than $15 million in the third quarter, up from $10.8 million in the year-ago quarter.