This communication contains forward-looking statements (including within the meaning of Section 21E of the United States Securities Exchange Act of 1934,
as amended, and Section 27A of the United States Securities Act of 1933, as amended) concerning Edge, PDS, the transactions contemplated by the Merger Agreement (the “Merger”) and other matters. These statements may discuss goals, intentions and
expectations as to future plans, trends, events, results of operations or financial condition, or otherwise, based on current beliefs of the management of Edge, as well as assumptions made by, and information currently available to, management.
Forward-looking statements generally include statements that are predictive in nature and depend upon or refer to future events or conditions, and include words such as “may,” “will,” “should,” “would,” “expect,” “anticipate,” “plan,”
“likely,” “believe,” “estimate,” “project,” “intend,” and other similar expressions among others. Statements that are not historical facts are forward-looking statements. Forward-looking statements are based on current beliefs and assumptions that
are subject to risks and uncertainties and are not guarantees of future performance. Actual results could differ materially from those contained in any forward-looking statement as a result of various factors, including, without limitation: the
risk that the conditions to the closing of the Merger are not satisfied, including the failure to timely or at all obtain stockholder approval for the Merger; uncertainties as to the timing of the consummation of the Merger and the ability of each
of Edge and PDS to consummate the Merger; risks related to Edge’s ability to correctly estimate its operating expenses and its expenses associated with the Merger; risks related to the market price of Edge’s common stock relative to the exchange
ratio; the ability of Edge or PDS to protect their respective intellectual property rights; competitive responses to the Merger; unexpected costs, charges or expenses resulting from the Merger; potential adverse reactions or changes to business
relationships resulting from the announcement or completion of the Merger; and legislative, regulatory, political and economic developments. The foregoing review of important factors that could cause actual events to differ from expectations should
not be construed as exhaustive and should be read in conjunction with statements that are included herein and elsewhere, including the risk factors included in Edge’s most recent Annual Report on Form 10-K, and Edge’s recent Quarterly Report on
Form 10-Q and Current Reports on Form 8-K filed with the SEC. Edge can give no assurance that the conditions to the Merger will be satisfied. Except as required by applicable law, Edge undertakes no obligation to revise or update any
forward-looking statement, or to make any other forward-looking statements, whether as a result of new information, future events or otherwise.
This communication is for informational purposes only and is neither an offer to purchase, nor a solicitation of an offer to sell, subscribe for or buy any
securities or the solicitation of any vote in any jurisdiction pursuant to the proposed transactions or otherwise, nor shall there be any sale, issuance or transfer of securities in any jurisdiction in contravention of applicable law. No offer of
securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended.
Edge and PDS, and each of their respective directors and executive officers and certain of their other members of management and employees and affiliates
of their respective directors, may be deemed to be participants in the solicitation of proxies in connection with the Merger. Information about Edge’s directors and executive officers is included in Edge’s Annual Report on Form 10-K for the year
ended December 31, 2017, filed with the SEC on March 1, 2018, and the Proxy Statement on Schedule 14A for the 2018 Annual Meeting of Stockholders filed with the SEC on April 25, 2018. Additional information regarding these persons and their
interests in the Merger will be included in the proxy statement relating to the Merger when it is filed with the SEC. These documents can be obtained free of charge from the sources indicated above.