9. Smith & Nephew
This London-based orthopedics company has been in the news lately as an acquisition target of several large U.S. medtech companies. If such a transaction goes through, it will have an impact on headcount for sure.
But in the last five years, Smith & Nephew added an average of 559 people taking overall employment to 11,036 as of 2013.
Source: Evaluate MedTech
Image: From Smith & Nephew website