China has issued record fines of 670 million yuan ($108 million) on six baby formula companies on the mainland following an anti-trust probe, according to an announcement by the National Development and Reform Commission (NDRC) on August 7.

Biostime was fined 163 million yuan ($26.63 million), or 6 percent of its sales revenue in 2012, as it "seriously violated anti-monopoly laws and failed to actively take corrective action," said Xu Kunlin, Director of the Price Department of the NDRC.

Mead Johnson was fined 204 million yuan ($33.33 million), or 4 percent of its previous year's revenue last year, because it "did not actively cooperate with the investigation while taking active self-rectification measures," said Xu.

Dumex, Abbott, Friesland and Fonterra each received a fine equal to 3 percent of their 2012 revenue. Xu said these four companies cooperated in the probe and actively moved to correct their practices.

Wyeth, Beingmate and Meiji were exempt from punishment, because they cooperated with the investigation, provided evidence and actively took self-rectification measures, said Xu.

Xu said in the probe into these nine companies initiated in March, the NDRC found the involved formula producers set minimum resale prices for distributors. The distributors that sold their products at a price lower than the fixed minimum price were punished.