General Electric Co., Merck KGaA, Sigma-Aldrich. and Canon risk fines for breaching European Union merger rules after regulators sent them antitrust complaints, months after the EU fined Facebook $125 million for giving misleading information during a deal review.

GE was accused of misleading officials examining its 1.5 billion-euro takeover of LM Wind Power, the European Commission said Thursday. Darmstadt, Germany-based Merck KGaA and Sigma-Aldrich also got objections for failing to provide information on a research project for chemicals during a 2015 merger review, it said. A third complaint went to Canon, which didn't seek EU approval before implementing a Toshiba unit takeover last year.

"We can only do our job well if we can rely on cooperation from the companies concerned — they must obtain our approval before they implement their transactions and the information they supply us must be correct and complete," EU Competition Commissioner Margrethe Vestager said.