The maker of Diatron diagnostic devices is now valued at $5 billion.
Diatron’s stock has gone from $1.9 billion to $531 million since the start of the year.
The stock closed at $2.20 on Monday.
The company made $1 billion in the third quarter, up from $850 million in the previous quarter.
The company also raised a record $1 million in cash, bringing its total funding to $3.7 billion.
The shares were trading at $4.20 at the time of the company’s earnings report.
Diatron, which is based in California, sells the device kits that doctors use to diagnose, treat and prevent many diseases.
The devices are used by hospitals, doctors and nursing homes.