Diadexus, Inc. Announces Reverse Stock Split

SOUTH SAN FRANCISCO, CA--(Marketwired - Jul 1, 2015) - Diadexus, Inc. (OTCQB: DDXS), a diagnostics company developing and commercializing products that aid in the prediction of cardiac disease risk, today announced that it has completed a 1-for-15 reverse stock split of its common stock, effective as of 5:00 pm Eastern Time June 30, 2015. Beginning with the opening of trading today the Company's common stock will trade on OTCQB on a post-split basis.

At the effective time of the reverse stock split, every 15 shares of the Company's issued and outstanding common stock will automatically be combined into one issued and outstanding share of common stock, with no change in par value per share. The number of shares of common stock underlying Diadexus' options, warrants, convertible securities or other rights to acquire shares of common stock will be adjusted accordingly. As a result, each stockholder's percentage ownership interest and proportional voting power remains unchanged and the rights and privileges of the holders of the Company's common stock are unaffected. Stockholders are not required to take any action.

The reverse stock split will reduce the number of outstanding common shares from approximately 58 million to approximately 4 million. Concurrently, the authorized number of shares of common stock will be reduced to 50 million. No fractional shares will be issued in connection with the reverse stock split. Stockholders who would otherwise be entitled to receive a fractional share will receive a cash payment in lieu thereof.

The Company has chosen Computershare Inc. as its exchange agent for the reverse stock split. Stockholders holding certificated shares or shares through a brokerage account will have their shares automatically adjusted to reflect the reverse stock split as of the effective date. The issuance of new stock certificates will not be required; however, stockholders may obtain a new certificate from the Company's transfer agent. Computershare will provide instructions to stockholders with physical certificates regarding the optional process for exchanging their pre-split stock certificates for post-split stock certificates.

About Diadexus, Inc.

Diadexus, based in South San Francisco, California, is a diagnostics company developing and commercializing products that aid in the prediction of cardiac disease risk, providing healthcare providers with actionable information for managing patients. The Company pioneered the testing of Lp-PLA2 (lipoprotein-associated phospholipase A2), a marker of vascular-specific inflammation that provides new information, over and above traditional risk factors measured in a lipid panel, and has over a decade of peer-reviewed literature validating its utility. Diadexus' products, The PLAC® Test ELISA Kit, first cleared by the FDA in 2003, and The PLAC® Test for Lp-PLA2 Activity, cleared in December 2014, are the only two FDA-cleared tests to measure Lp-PLA2.