UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE TO

TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE
SECURITIES EXCHANGE ACT OF 1934

Argon ST, Inc.

(Name of Subject Company)

Vortex Merger Sub, Inc.
(Offeror)
a wholly owned subsidiary of

The Boeing Company
(Parent of Offeror)

COMMON STOCK, $0.01 PAR VALUE PER SHARE
(Title of Class of Securities)

040149106
(CUSIP Number of Class of Securities)

Michael F. Lohr
Vice President, Corporate Secretary and Assistant General Counsel
The Boeing Company
100 N. Riverside Drive
Chicago, IL 60606-1596
(312) 544-2000
(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications
on Behalf of Filing Persons)

Transaction Valuation		Amount of Filing Fee
$N/A		$N/A

o		Check the box if any part of the fee is offset as provided by Rule 0-11(a)(2) and identify    the filing with which the offsetting fee was previously paid. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.
þ		Check the box if the filing relates solely to preliminary communications made before the commencement of a tender offer.

		Amount Previously Paid: N/A		Filing Party: N/A
		Form of Registration No.: N/A		Date Filed:    N/A

Check the appropriate boxes below to designate any transactions to which the statement relates:

þ      Third-party offer subject to Rule 14d-1.

o      Issuer tender offer subject to Rule 13e-4.

o      Going-private transactions subject to Rule 13e-3.

o      Amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results of the tender offer: o

 

 

     This filing relates solely to preliminary communications made before the commencement of a planned tender offer by Vortex Merger Sub, Inc. (the “Purchaser”), a wholly owned subsidiary of The Boeing Company (the “Parent”), for all of the outstanding common stock of Argon ST, Inc. (the “Company”), to be commenced pursuant to the Agreement and Plan of Merger, dated as of June 30, 2010, among the Parent, the Purchaser and the Company.

     The exhibits are neither an offer to purchase nor solicitation of an offer to sell securities. The tender offer for the outstanding shares of the Company’s common stock described in this filing has not commenced. At the time the offer is commenced, the Purchaser will file a tender offer statement on Schedule TO with the Securities and Exchange Commission, and the Company will file a solicitation/recommendation statement on Schedule 14D-9, with respect to the offer. The tender offer statement (including an offer to purchase, a related letter of transmittal and other offer documents) and the solicitation/recommendation statement will contain important information that should be read carefully before any decision is made with respect to the tender offer. Those materials will be made available to the Company’s stockholders at no expense to them. In addition, all of those materials (and all other offer documents filed with the SEC) will be available at no charge on the SEC’s website: www.sec.gov.

Exhibit Index

Exhibit		Description
99.1		Press Release dated June 30, 2010
99.2		Presentation to Argon employees (incorporated by reference to Exhibit 99.3 to the Schedule 14D-9C filed by Argon ST, Inc. with the Securities and Exchange Commission on June 30, 2010)