SOUTH SAN FRANCISCO, Calif., May 6 /PRNewswire-FirstCall/ -- Rigel Pharmaceuticals, Inc. (Nasdaq: RIGL) today reported financial results for the first quarter ended March 31, 2008.
During the first quarter of 2008, Rigel reported a net loss of $27.3 million, or $0.79 per share, compared to a net loss of $17.1 million, or $0.68 per share, in the first quarter of 2007. Weighted average shares outstanding for the first quarters of 2008 and 2007 were 34.4 million and 25.2 million, respectively.
Rigel reported no revenues from collaborations in the first quarter of 2008, compared to $2.6 million reported in the first quarter of 2007. Collaboration revenue in the first quarter of 2007 included research reimbursement from Merck and amortization of an upfront payment from Pfizer. Our collaboration with Merck is focused on research in oncology while our collaboration with Pfizer is focused on the development of R343, which is currently in Phase 1 clinical testing for allergic asthma via intrapulmonary delivery.
Rigel reported operating expenses of $28.7 million in the first quarter of 2008, compared to $20.9 million in the first quarter of 2007. The increase in operating expenses was primarily due to increases in clinical expenses and stock-based compensation expense. The increase in clinical expenses was mainly due to an increase in costs associated with our planned Phase 2b clinical trials of R788 in rheumatoid arthritis, including costs related to manufacturing of R788 material to be used in the trials. Stock-based compensation expense increased from $2.6 million in the first quarter of 2007 to $5.8 million in the first quarter of 2008 due mainly to higher valuation of options granted in the first quarter of 2008.
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