As previously disclosed, on July 28, 2019,
Genomic Health, Inc., a Delaware corporation (“Genomic Health”), entered into an Agreement and Plan of Merger with
Exact Sciences Corporation, a Delaware corporation (“Exact Sciences”), and Spring Acquisition Corp., a Delaware corporation
and a wholly owned subsidiary of Exact Sciences (“Merger Sub”), pursuant to which Merger Sub will merge with and into
Genomic Health, with Genomic Health surviving as a wholly owned subsidiary of Exact Sciences (the “Merger”).
The completion of the Merger is conditioned
upon expiration or termination of any applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976,
as amended (the “HSR Act”) relating to the consummation of the Merger. The applicable waiting period under the HSR
Act expired at 11:59 p.m., Eastern time, on September 9, 2019.
The completion of the Merger remains subject
to other customary closing conditions, including approval of the Merger by Genomic Health stockholders.
* * *
Additional Information
In connection with the proposed transaction,
Exact Sciences has filed with the Securities and Exchange Commission (“SEC”) a registration statement on Form S-4,
which includes a preliminary prospectus of Exact Sciences and a preliminary proxy statement of Genomic Health (the “proxy
statement/prospectus”), and each party will file other documents regarding the proposed transaction with the SEC. The registration
statement has not yet become effective and the proxy statement/prospectus included therein is in preliminary form. INVESTORS
AND SECURITY HOLDERS ARE URGED TO READ THE REGISTRATION STATEMENT, PROXY STATEMENT/PROSPECTUS AND OTHER RELEVANT DOCUMENTS FILED
WITH THE SEC WHEN THEY BECOME AVAILABLE, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. A definitive proxy statement/prospectus
will be sent to Genomic Health’s stockholders when it becomes available. Investors and security holders may obtain the registration
statement and the proxy statement/prospectus free of charge from the SEC’s website (https://www.sec.gov) or from Exact Sciences
or Genomic Health when it becomes available. The documents filed by Exact Sciences with the SEC may be obtained free of charge
at Exact Sciences’ website at www.exactsciences.com or at the SEC’s website at www.sec.gov. These documents may also
be obtained free of charge from Exact Sciences by requesting them by mail at Exact Sciences Corporation, 441 Charmany Drive, Madison,
Wisconsin 53719, or by telephone at (608) 535-8815. The documents filed by Genomic Health with the SEC may be obtained free of
charge at Genomic Health’s website at www.genomichealth.com or at the SEC’s website at www.sec.gov. These documents
may also be obtained free of charge from Genomic Health by requesting them by mail at Genomic Health, Inc., 301 Penobscot Drive,
Redwood City, California 94063, or by telephone at (650) 556-9300.
Participants in the Solicitation
Exact Sciences, Genomic Health and their
respective directors and executive officers and other members of management and employees may be deemed to be participants in the
solicitation of proxies in connection with the proposed transaction. Information about Exact Sciences’ directors and executive
officers is available in Exact Sciences’ proxy statement for its 2019 Annual Meeting of Stockholders, which was filed with
the SEC on April 30, 2019, and Exact Sciences’ Current Report on Form 8-K, which was filed with the SEC on July 26, 2019.
Information about Genomic Health’s directors and executive officers is available in Genomic Health’s proxy statement
for its 2019 Annual Meeting of Stockholders, which was filed with the SEC on April 25, 2019, and Genomic Health’s Annual
Report on Form 10-K for the year ended December 31, 2018, which was filed with the SEC on February 28, 2019. Other information
regarding the participants in the proxy solicitation and a description of their direct and indirect interests, by security holdings
or otherwise, are or will be contained in the registration statement, the proxy statement/prospectus and other relevant materials
filed or to be filed with the SEC regarding the proposed transaction. Stockholders, potential investors and other readers should
read the proxy statement/prospectus carefully before making any voting or investment decisions. You may obtain free copies of these
documents from Exact Sciences or Genomic Health as indicated above.
No Offer or Solicitation
This communication shall not constitute
an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any jurisdiction
in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of
any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section
10 of the Securities Act of 1933.