Alnylam Pharmaceuticals Announces Proposed Public Offering of $125 Million of Common Stock

  Alnylam Pharmaceuticals Announces Proposed Public Offering of $125 Million
  of Common Stock

Business Wire

CAMBRIDGE, Mass. -- January 14, 2013

Alnylam Pharmaceuticals, Inc. (NASDAQ: ALNY), a leading RNAi therapeutics
company, today announced that it has commenced an underwritten public offering
of shares of its common stock to raise aggregate proceeds of approximately
$125 million. All of the shares in the offering are to be sold by Alnylam.

J.P. Morgan Securities LLC and Morgan Stanley & Co. LLC are acting as joint
book-running managers and representatives of the underwriters for the
offering. Alnylam intends to grant the underwriters a 30-day option to
purchase up to an additional 15 percent of the number of shares sold to cover
over-allotments, if any. The offering is subject to market conditions, and
there can be no assurance as to whether or when the offering may be completed,
or as to the actual size or terms of the offering.

The securities described above are being offered by Alnylam pursuant to an
automatically effective shelf registration statement that Alnylam previously
filed with the Securities and Exchange Commission (SEC).

This press release shall not constitute an offer to sell or the solicitation
of an offer to buy any securities nor shall there be any sale of these
securities in any state in which such offer, solicitation or sale would be
unlawful prior to registration or qualification under the securities laws of
such state. The offering of these securities will be made only by means of a
prospectus and the related prospectus supplement. Before you invest, you
should read the prospectus and the related prospectus supplement and any other
document Alnylam has filed with the SEC for more complete information about
Alnylam and this offering. You may get these documents for free by visiting
EDGAR on the SEC website at Alternatively, copies of these
documents may be obtained by contacting J.P. Morgan Securities LLC, c/o
Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, New York
11717 (telephone: 866-803-9204); or Morgan Stanley & Co. LLC, Attn: Prospectus
Department, 180 Varick Street, 2nd Floor, New York, NY 10014 (telephone:
866-718-1649, email:

About Alnylam Pharmaceuticals

Alnylam is a biopharmaceutical company developing novel therapeutics based on
RNA interference, or RNAi. The company is leading the translation of RNAi as a
new class of innovative medicines with a core focus on RNAi therapeutics for
the treatment of genetically defined diseases, including ALN-TTR for the
treatment of transthyretin-mediated amyloidosis (ATTR), ALN-AT3 for the
treatment of hemophilia and rare bleeding disorders (RBD), ALN-AS1 for the
treatment of acute intermittent porphyria, ALN-PCS for the treatment of severe
hypercholesterolemia, and ALN-TMP for the treatment of hemoglobinopathies. As
part of its “Alnylam 5x15™” strategy, the company expects to have five RNAi
therapeutic products for genetically defined diseases in clinical development,
including programs in advanced stages, on its own or with a partner by the end
of 2015. Alnylam has additional partnered programs in clinical or development
stages, including ALN-RSV01 for the treatment of respiratory syncytial virus
(RSV) infection and ALN-VSP for the treatment of liver cancers. The company’s
leadership position on RNAi therapeutics and intellectual property have
enabled it to form major alliances with leading companies including Merck,
Medtronic, Novartis, Biogen Idec, Roche, Takeda, Kyowa Hakko Kirin, Cubist,
Ascletis, Monsanto and Genzyme. In addition, Alnylam holds a significant
equity position in Regulus Therapeutics Inc., a company focused on discovery,
development, and commercialization of microRNA therapeutics. Alnylam has also
formed Alnylam Biotherapeutics, a division of the company focused on the
development of RNAi technologies for applications in biologics manufacturing,
including recombinant proteins and monoclonal antibodies. Alnylam’s VaxiRNA™
platform applies RNAi technology to improve the manufacturing processes for
vaccines; GlaxoSmithKline is a collaborator in this effort. Alnylam scientists
and collaborators have published their research on RNAi therapeutics in over
100 peer-reviewed papers, including many in the world’s top scientific
journals such as Nature, Nature Medicine, Nature Biotechnology, and Cell.
Founded in 2002, Alnylam maintains headquarters in Cambridge, Massachusetts.

Alnylam Forward-Looking Statements

Statements in this release concerning Alnylam’s future expectations, plans and
prospects, including Alnylam’s intention to publicly offer shares of its
common stock, constitute forward-looking statements for the purposes of the
safe harbor provisions under The Private Securities Litigation Reform Act of
1995. Actual results may differ materially from those indicated by these
forward-looking statements as a result of various important factors, including
risks related to fluctuations in our stock price, those associated with market
conditions and the satisfaction of customary closing conditions related to the
proposed offering, as well as those risks more fully discussed in the “Risk
Factors” filed with Alnylam’s current report on Form 8-K filed with the SEC on
January 14, 2013 and in other filings that Alnylam makes with the SEC. There
can be no assurance that Alnylam will be able to complete the proposed public
offering on the anticipated terms, or at all. You should not place undue
reliance on these forward-looking statements. In addition, any forward-looking
statements represent Alnylam’s views only as of today and should not be relied
upon as representing Alnylam’s views as of any subsequent date. Alnylam
disclaims any obligation to update any forward-looking statements.


Alnylam Pharmaceuticals, Inc.
Cynthia Clayton, 617-551-8207
Vice President, Investor Relations and
Corporate Communications
Michael P. Mason, 617-551-8327
Vice President, Finance and Treasurer
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