By Mike Billings
Atara Biotherapeutics Inc., which is developing therapies for
illnesses that include kidney disease and cancer, has filed for an
initial public offering.
Billionaire Mexican businessman Carlos Slim is one of Atara's
investors, through a family trust that owns 9.3% of Atara shares,
according to a regulatory filing.
Atara, of Brisbane, Calif., was incorporated in 2012, and has
never generated revenue. It had a net loss of $4.1 million in 2012
and $8.8 million in 2013.
Atara said in a regulatory filing that the proceeds from the IPO
would be used for development and clinical studies of two of its
drug candidates and to expand its research for other drug
candidates.
Kleiner Perkins Caufield & Byers is one of the largest
shareholders in Atara, owning 18.6% of the pre-IPO shares. Domain
Associates holds 13.2% of the shares, DAG Ventures holds 13.2%, the
hedge fund The Baupost holds 11.8%, Celgene Corp. holds 8.7%, Amgen
Inc. holds 8.6% and Alexandria Real Estate Equities Inc. holds
5.3%.
The company raised $52 million in Series B funding in January.
Other investors in the company include Domain Associates and EcoR1
Capital.
Atara said it could raise as much as $50 million from the IPO,
though that is a placeholder number that is likely to change.
Atara filed to be listed on the Nasdaq under the symbol
ATRA.
Write to Mike Billings at mike.billings@wsj.com.
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