On May 10, 2017, LMI Aerospace, Inc. (the Company) issued a press
release (the Earnings Press Release) announcing, among other
things, its financial performance for the first quarter ended
March 31, 2017. The full text of the Earnings Press Release is
attached as Exhibit 99.1 hereto and incorporated herein by
reference.

Exhibit 99.1 attached to this Current Report on Form 8-K is
deemed furnished to the Securities and Exchange Commission (the
SEC), and not filed with the SEC, and shall not be deemed
incorporated by reference by any general statement incorporating
by reference this Current Report on Form 8-K into any filing by
the Company under the Securities Act of 1933, as amended, or the
Exchange Act of 1934, as amended, and shall not otherwise be
deemed filed under such acts.

Section 9 Financial Statements and Exhibits

Item 9.01. Financial Statements and Exhibits

Additional Information and Where to Find It

In connection with the proposed merger with a wholly-owned
indirect subsidiary of Sonaca S.A., the Company filed a
definitive proxy statement and form of proxy with the SEC on
Schedule 14A on April 24, 2017, which was also mailed to
shareholders of the Company on or about April 28, 2017. BEFORE
MAKING ANY VOTING DECISION, THE COMPANYS SHAREHOLDERS ARE URGED
TO READ THE PROXY STATEMENT IN ITS ENTIRETY AND ANY OTHER
DOCUMENTS TO BE FILED WITH THE SEC IN CONNECTION WITH THE
PROPOSED MERGER OR INCORPORATED BY REFERENCE IN THE PROXY
STATEMENT (IF ANY) BECAUSE THEY WILL CONTAIN IMPORTANT
INFORMATION ABOUT THE PROPOSED MERGER AND THE PARTIES TO THE
PROPOSED MERGER. Investors and shareholders may obtain a free
copy of documents filed by the Company with the SEC at the SECs
website at http://www.sec.gov. In addition, investors and
shareholders may obtain a free copy of the Companys filings with
the SEC from the Companys website at
http://www.lmiaerospace.com>or by directing a request to: LMI
Aerospace, Inc., 411 Fountain Lakes Boulevard, St. Charles,
Missouri 63301, Attention: Corporate Secretary, (636) 946-6525.

Participants in the Solicitation

The Company and certain of its directors, executive officers, and
certain other members of management and employees of the Company
may be deemed to be participants in the solicitation of proxies
from shareholders of the Company in favor of the proposed merger.
Information about directors and executive officers of the Company
and their ownership of the Companys common stock is set forth in
the Companys annual report on Form 10-K/A (Amendment No. 1) for
the fiscal year ended December 31, 2016, as filed with the SEC on
April 4, 2017, and its definitive proxy statement referenced
above for its special meeting of shareholders. Certain directors,
executive officers, other members of management and employees of
the Company may have direct or indirect interests in the proposed
merger due to securities holdings, vesting of equity awards,
rights to severance payments and other rights set forth in
current employment agreements and prospective employment
agreements that are expected to become effective as of the
closing of the merger. Additional information regarding the
direct and indirect interests of these individuals and other
persons who may be deemed to be participants in the solicitation
will be included in the proxy statement with respect to the
merger the Company will file with the SEC and furnish to the
Companys shareholders.