Over the past 12 months, the Telix Pharmaceuticals Ltd(ASX: TLX) share price has posted massive gains exceeding 150%. The Telix share price kicked off 2020 at $1.53, closed the year at $3.78 and is currently sitting at $3.86 per share. So what has Telix done to achieve this remarkable pump for its share price? Significant US Food and Drug Administration (FDA) wins In January 2020, Telix announced that the US Food and Drug Administration (FDA) approved the recruitment of American participants in the company’s Zirconium Imaging in Renal Cancer Oncology (ZIRCON) study. This was an important milestone because it extended the Phase III study into new territory beyond Australia and Europe.