Nanobiotix wants to transform therapy using its NanoXray technology portfolio. When certain nanoparticles are directly injected into cancerous tissue and radiotherapy is applied, these particles have the ability to absorb x-rays and increase the amount of radiation to destroy diseased cells. Surrounding healthy tissue do not get increased radiation doses. 

Last year, the French company's share price jumped 217%, to 16.72 euros ($18.38) from 5.27 euros ($6.85) at the end of 2013. As a result, the company added $221 million to its market cap.