SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 14D-9
(Rule 14d-101)
Solicitation/Recommendation Statement Under Section 14(d)(4)
of the Securities Exchange Act of 1934
(Amendment No. 4)
APPLIED SIGNAL TECHNOLOGY, INC.
(Name of Subject Company)
APPLIED SIGNAL TECHNOLOGY, INC.
(Name of Person Filing Statement)
Common Stock, without par value
(Title of Class of Securities)
038237103
(CUSIP Number of Class of Securities)
William B. Van Vleet III
President and Chief Executive Officer
460 West California Avenue
Sunnyvale, California 94086
(408) 749-1888
(Name, Address and Telephone Number of Person Authorized to Receive Notices and
Communications on Behalf of Person Filing Statement)
Copy to:
Jason C. Harmon, Esq.
DLA Piper LLP (US)
6225 Smith Avenue
Baltimore, Maryland 21209
(410) 580-4170
o Check the box if the filing relates solely to preliminary communications made before the commencement of a tender offer.
This Amendment No. 4 (this Amendment No. 4) amends and supplements Item 8 in the
Solicitation/Recommendation Statement on Schedule 14D-9 filed with the U.S. Securities and Exchange
Commission on December 30, 2010, by Applied Signal Technology, Inc., a California corporation (the
Company), as amended or supplemented from time to time (the Schedule 14D-9).
The Schedule 14D-9 relates to the tender offer by RN Acquisition Company, a California corporation
(Purchaser), a wholly owned subsidiary of Raytheon Company, a Delaware corporation
(Parent), and pursuant to which Purchaser has offered to purchase all of the outstanding
shares of common stock, without par value, of the Company (the Shares) that are not
already owned by Parent and its subsidiaries at a price of $38.00 per Share, net to the seller in
cash, without interest thereon and less any applicable withholding taxes, upon the terms and
subject to the conditions set forth in Purchasers Offer to Purchase dated December 30, 2010 and
the related Letter of Transmittal, as each may be amended or supplemented from time to time.
Except as otherwise set forth below, the information set forth in the Schedule 14D-9 remains
unchanged and is incorporated herein by reference as relevant to items in this Amendment No. 4.
Capitalized terms used but not otherwise defined herein have the meanings ascribed to such terms in
the Schedule 14D-9.
Item 8. Additional Information.
Item 8 of the Schedule 14D-9 is hereby amended and supplemented by replacing the paragraph
prior to the section entitled Financial Forecasts with the following:
Litigation
On January 11, 2011, a putative shareholder class action lawsuit was filed in the Superior Court
of the State of California, County of Santa Clara (the Court), captioned Jarackas v. Applied
Signal Technology, Inc., et al. (Case No. 111 CV 191643) against the Company, the members of its
board of directors, Raytheon Company and RN Acquisition Company (the Complaint). The Complaint
alleges that the members of the Companys board of directors breached their fiduciary duties in
connection with the boards recommendation to the Companys stockholders to accept the Offer,
authorizing the Company to enter into the Merger Agreement and the disclosures regarding the Offer
and the Merger. The Complaint alleges that Parent and the Purchaser aided and abetted the board of
directors breach of fiduciary duties. The Complaint seeks injunctive relief and does
not seek an award of money damages. On January 18, 2011, the plaintiff filed an ex parte
application for a temporary restraining order to enjoin the Purchaser from accepting any Shares
tendered in the Offer except under certain circumstances. On January 20, 2011, the Court denied
the plaintiffs ex parte application for the temporary restraining order. The foregoing summary of
the Complaint does not purport to be complete and is qualified in its entirety by reference to the
Complaint, which is filed as Exhibit (a)(14) to this Schedule 14D-9. The Company believes the
allegations in the Complaint are without merit and intends to defend vigorously the action.