Rigel Pharmaceuticals, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

SIGNIFICANT CONCENTRATIONS

SIGNIFICANT CONCENTRATIONS	12 Months Ended
SIGNIFICANT CONCENTRATIONS	Dec. 31, 2012
SIGNIFICANT CONCENTRATIONS
SIGNIFICANT CONCENTRATIONS	3. SIGNIFICANT CONCENTRATIONS For the year ended December 31, 2012, AZ, Daiichi and BerGenBio accounted for 44%, 33% and 22% of our revenues, respectively. For the year ended December 31, 2011, Merck Serono and BerGenBio accounted for 89% and 11% of our revenues, respectively. For the year ended December 31, 2010, AZ accounted for 100% of our revenues. At December 31, 2012 and 2011, we had no accounts receivable.

- Definition

The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.

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+ Details