diaDexus Announces Reverse Stock Split

SOUTH SAN FRANCISCO, CA--(Marketwired - July 01, 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.

The Company also has a pipeline of biomarkers for heart failure, proADM, proET-1 and proANP, with each providing distinct, additive information for healthcare providers over currently available markers. Diadexus also provides services to pharmaceutical partners to address the need to incorporate biomarkers in clinical development. For more information, please visit the Company’s website at www.diadexus.com.

Forward-Looking Statements

This release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Any statements in this release that are not historical facts may be considered such “forward-looking statements,” including statements regarding, among other things, the impact and the timing of the reverse stock split on the company’s business, prospects and/or stock price. Forward-looking statements are based on current expectations and assumptions and entail various risks and uncertainties that could cause actual results to differ materially from those expressed in such forward-looking statements. Important factors known to us that could cause actual results to differ materially from those expressed in such forward-looking statements include the factors necessary to achieve our revenue guidance; sales of our PLAC® Test products in the marketplace; our ability to grow revenues from existing and new customers; product pricing and demand with a concentrated customer base; the continued focus of regulatory agencies and payors on costs and our laboratory customer practices; relationships with key customers; our ability to continue to build our heart failure franchise; our ability to identify and build products with additional biomarkers; third party payors’ acceptance of and reimbursement for the PLAC® Tests; our ability to continue to manufacture the PLAC® Tests to meet customer demand; the potential for success of and timing of when our development efforts may be completed; the adequacy of our intellectual property rights and our ability to maintain a proprietary position for our lead product; our limited revenue and cash resources; our significant corporate expenses, including real estate lease liabilities and expenses associated with being a public company; our ability to develop proADM for regulatory submission, and our ability to successfully integrate our new management leadership. Additional factors that could cause our results to differ materially from those described in the forward-looking statements can be found in our most recent annual report on Form 10-K, quarterly report on Form 10-Q, and other reports filed with the Securities and Exchange Commission, and available at the SEC’s web site at www.sec.gov. The information set forth herein speaks only as of the date hereof, and except as required by law, we disclaim any intention and does not assume any obligation to update or revise any forward looking statement, whether as a result of new information, future events or otherwise.