mdcMDC Partners reported second quarter revenue inched up 0.1% to $337M in a "challenging quarter" as the New York-based PR and marketing group lowered guidance for the year.

Net income fell to $1.2M from $29.6M a year earlier. Net loss for the first six months of the year was $22.1M, up from $2.5M in 2015.

Chairman and CEO Scott Kauffman called Q2 a "challenging quarter for our business" with results below expectations. He stressed a strong underlying business is positioned for growth in the second half.

MDC, which owns PR units like Allison+Partners and Kwittken, said net new business for the year was $57M.

Guidance for 2016 revenue was reduced by $20M to a range of $1.39B to $1.42B.