on Form
10-K
for the year ended December 31, 2017, which was filed with the SEC on March 9, 2018, and the proxy statement for Arsanis 2018
annual meeting of stockholders, which was filed with the SEC on April 23, 2018. Investors and security holders may obtain free copies of these documents as described in the paragraph below.
IMPORTANT INFORMATION ABOUT THE TRANSACTION IS FILED WITH THE SEC
In connection with the proposed Merger, Arsanis filed the Definitive Proxy Statement with the SEC on February 14, 2019. The Definitive Proxy Statement was
first mailed on or about February 20, 2019 to Arsanis stockholders of record as of the close of business on January 11, 2019. ARSANIS STOCKHOLDERS AND X4 EQUITY HOLDERS ARE URGED TO READ THE DEFINITIVE PROXY STATEMENT REGARDING THE
PROPOSED TRANSACTION AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS, BECAUSE THEY CONTAIN IMPORTANT INFORMATION. Investors and security holders may obtain a free copy of the
Definitive Proxy Statement and other filings containing information about Arsanis at the SECs website at www.sec.gov. The Definitive Proxy Statement and the other filings may also be obtained free of charge by contacting: Arsanis, Inc., 950
Winter Street, Suite 4500, Waltham, Massachusetts 02451, Attention: Investor Relations.
Additional information regarding the interests of those
participants and other persons who may be deemed participants in the transaction may be obtained by reading the Definitive Proxy Statement. Free copies of this document may be obtained as described in the preceding paragraphs.
NO OFFERS OR SOLICITATIONS
This communication shall not
constitute an offer to sell or the solicitation of 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 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
(the Securities Act).
CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS
Certain statements in this Current Report on Form
8-K
regarding the Merger, the expected exchange ratios under the
Merger Agreement and the percentage ownership of the combined company following the Merger and the strategies, goals, prospects, plans, expectations, forecasts or objectives of Arsanis, X4 or the combined company constitute forward-looking
statements within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended (the Exchange Act), and are usually identified by the use of words such as
anticipates, believes, estimates, expects, intends, may, plans, projects, seeks, should, will, would, and
variations of such words or similar expressions. Arsanis intends for these forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in Section 27A of the Securities Act and Section 21E
of the Exchange Act and is making this statement for purposes of complying with those safe harbor provisions. These forward-looking statements reflect Arsanis current views about its plans, intentions, expectations, strategies and prospects,
which are based on the information currently available to Arsanis and on assumptions it has made. Although Arsanis believes that its plans, intentions, expectations, strategies and prospects as reflected in or suggested by those forward-looking
statements are reasonable, Arsanis can give no assurance that the plans, intentions, expectations or strategies will be attained or achieved. Furthermore, actual results may differ materially from those described in the