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One of Europe's biggest building supplies makers Cie. De Saint-Gobain SA (CODGF) believes last month's "NotPetya" cyber-attack probably cost it about 1% of first half sales.

La Defense, France-based Saint-Gobain said Thursday, July 13, that it had restored all systems affected by the attack by the start of the week after and claimed that no personal data had been lost.

Saint-Gobain shares traded Thursday at €48.16 ($54.87), marginally higher than their Wednesday close and almost 3% higher than their June 30 close of €46.66 after it became apparent the company had been hit by the virus.

"Saint-Gobain's teams have made all efforts to minimize disruption to our customers," the company said in a statement. "At this stage our preliminary assessment is that the impact on first half sales should be limited to around 1% some of which could be regained in the third quarter."

Saint-Gobain made €39.1 billion in sales in 2016, suggesting that it will have lost about €200 million in turnover as a result of the attack. That figure is almost twice as much as the £100 million ($129 million) top-line hit that household products maker Reckitt Benckiser Group Plc (RBGLY) said it was likely to suffer. Slough, England-based Reckitt Benckiser, last week, downgraded its revenue growth for the current year to 2% from 3% in the wake of the attack.

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Transport giant A.P. Moller-Maersk A/S (AMKBY) , another high-profile victim, is yet to put a figure on its loss after it was forced to shut down its global I.T. system to contain the virus. The Danish company said this week that it was still working to restore some shipping terminal operations to full capacity and would waive certain charges during the period from June 27 to July 9, when system outages meant it couldn't release customers' cargoes.

In the U.S., Mondelez (MDLZ) - Get Mondelez International, Inc. Class A Report , the maker of Oreo cookies, said it expected a 3% hit to second quarter sales from the attacks. FedEx (FDX) - Get FedEx Corporation Report and drugs giant Merck & Co. (MRK) - Get Merck & Co., Inc. Report were also hit by the virus but are yet to quantify its effect on their businesses.   

The NotPetya attack came to light on June 27, when it began to effect computers in Russia and Ukraine before its spread across the globe.

The virus was initially thought to be a so-called ransomware, similar to May's "WannaCry" outbreak, but experts including Symantec Corp. (SYMC) - Get Symantec Corporation Report have since labelled it is a simpler and potentially more devastating attack that permanently disables computers.

Of the companies hit by the virus over 30% were in the financial sector, while the energy sector and manufacturing sectors each accounted for 25% of the tally, according to cyber-security firm Kaspersky Lab ICS Cert.

Saint-Gobain said it would update investors on the impact of the attack at its first half results presentation on July 27.