Investing.com - Apple (NASDAQ:AAPL) and Boeing (NYSE:BA) are usually the first companies mentioned when it comes to vulnerability to a trade war with China, but there are other big companies that are more reliant on sales to the Asian giant.Some of them happen to be among the best performing stocks in the past year.Based on Goldman Sachs (NYSE:GS) list of companies with sales of 20% or more to China, here are 10 tech stocks and their 12-month gains. Topping the list is Nvidia, which has more than doubled. All of the top five companies are in the semiconductor industry. Among the second five, Texas Instruments (NASDAQ:TXN) and Microchip Technology (NASDAQ:MCHP) are also semiconductor companies. Apple just makes the cut with a 24% gain.