Eighty-six percent of big businesses in Russia said they were anxious about new punitive measures, according to a survey conducted by the U.S.-based Adizes Institute consultancy commissioned by the RBC news website.

Respondents named import bans, a weaker ruble and a ban on Russian state banks conducting foreign exchange transactions as their top three concerns.

“It’s impossible to prepare for this, just like [it’s impossible to prepare] for a natural disaster,” RBC quoted Mikhail Levchuk, a board member of the Business Russia entrepreneurial group, as saying.

As part of the survey, Adizes interviewed 1,015 Russian business owners and CEOs at companies in the manufacturing, construction, financial, transport, IT and medical sectors.

Asked about the effects of the last round of sanctions in April, 95 percent of big Russian businesses said they had suffered from a weak ruble and instability in financial markets.

“We’ve all been cooking in this cauldron since 2014. Some were more successful, some less. Some went out of business, while others adapted and found other suppliers,” Levchuk was quoted as saying.

Reuters contributed reporting to this article.