Robert W. Duggan, the chief executive officer of Pharmacyclics Inc. (PCYC), which makes an experimental treatment for chronic lymphocytic leukemia, has become a billionaire after the company’s shares have tripled in a year.
Pharmacyclics’ medicine, called ibrutinib, inhibits an enzyme that promotes cancer growth. It helped control the malignancy in 68 percent of 116 patients who hadn’t been previously treated for the blood cancer, the Sunnyvale, California-based company said in a December statement.
“It’s not just promising, it has those unique profiles of looking very efficacious but also really safe,” said John McCamant, editor of Medical Technology Stock Letter, in a phone interview. “That is very rare in cancer drugs.”
The stock surge comes after Duggan, 68, made hundreds of millions of dollars investing in and selling companies such as a bakery chain, a European billboard operation and robotic surgery innovator. He has a net worth of at least $1.2 billion, according to the Bloomberg Billionaires Index, and has never appeared on an international wealth ranking.
Naomi Cretcher, a spokeswoman for Pharmacyclics, did not respond to e-mail and phone queries for comment, after entertaining an interview request with Bloomberg News in December.