AP Photo/Mark Schiefelbein

Trade tensions have added to a policy-engineered slowdown in China.

Last week, Apple blamed slowing economic growth there as it cut its revenue forecast.

Several other large companies have issued similar warnings about the second-largest economy.

Apple rattled global markets last week as it cited cooling activity in China as a risk to revenue, underscoring expectations for the second-largest economy to lose steam. And it was far from alone in its warning.

Prominent companies around the world have been keeping watchful eyes on China's economy, which has been growing at its weakest pace in a decade.

After the start of a state-led deleveraging campaign in 2017, the slowdown had been widely expected. A spate of tariffs on hundreds of billions of dollars worth of American and Chinese products hasn't helped.

But as warning signs emerge left and right, some seem to have underestimated just how much steam the once-booming economy would lose.

"While we anticipated some challenges in key emerging markets, we did not foresee the magnitude of the economic deceleration, particularly in Greater China," Apple CEO Tim Cook said in his January 2 statement.

The China Passenger Car Association said Wednesday auto sales in the country slumped for the first time in more than two decades in 2018, laying onto concerns as factory activity contracts and after Chinese stocks closed their worst year in a decade.

To be sure, not all corporations are struggling in China. Nike, for instance, saw double-digit percentage sales growth in the country during the fiscal second quarter. In the post-earnings call, CFO Andy Campion said ongoing trade tensions had not affected the retailer.

But in recent months, an increasing number of companies seem to be on the other side of things. Here are a few of them: