SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 ------------------------------------------------------------ Schedule TO/A Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 (Amendment No. 3) GRC International, Inc. ------------------------------------------------------------ (Name of Subject Company) LMN Corporation AT&T Corp. ------------------------------------------------------------ (Name of Filing Person - Offeror) Common Stock, Par Value $0.10 Per Share ------------------------------------------------------------ (Title of Class of Securities) 361922 10 7 ------------------------------------------------------------ (CUSIP Number of Class of Securities) Marilyn J. Wasser, Esq. Vice President and Secretary AT&T Corp. 32 Avenue of the Americas New York, NY 10013-2412 Telephone: (212) 387-5400 ------------------------------------------------------------ (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications on Behalf of Filing Persons) Copy to: Steven A. Rosenblum, Esq. Wachtell, Lipton, Rosen & Katz 51 West 52nd Street New York, New York 10019 Telephone: (212) 403-1000 CALCULATION OF FILING FEE --------------------------------------------------------------------- ===================================================================== TRANSACTION VALUATION* AMOUNT OF FILING FEE --------------------------------------------------------------------- $205,921,425 $41,184.29 ===================================================================== * Estimated for purposes of calculating the amount of filing fee only. The amount assumes the purchase of 13,728,095 shares of common stock, par value $.10 per share (the "Shares"), at a price per Share of $15.00 in cash. Such number of Shares represents the sum of (i) all of the Shares outstanding as of January 31, 2000, (ii) all Shares issuable upon exercise of outstanding warrants to purchase Shares and (iii) all Shares issuable upon exercise of outstanding options to purchase Shares that could be exercised on or prior to the expiration of the tender offer described in this Tender Offer Statement on Schedule TO. [X] Check 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. Amount Previously Paid: $41,184.29 Form or Registration No.: Schedule TO, Amendment No. 1 to Schedule TO Filing Party: AT&T Corp. Date Filed: February 22, 2000 (Schedule TO), March 3, 2000 (Amendment No. 1) [ ] Check the box if the filing relates solely to preliminary communications made before the commencement of a tender offer. Check the appropriate boxes below to designate any transactions to which the statement relates: [X] third-party tender offer subject to Rule 14d-1. [ ] issuer tender offer subject to Rule 13e-4. [ ] going-private transaction subject to Rule 13e-3. [X] 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: [ ] Page 1 of 4 Pages This Amendment No. 3 (this "Amendment") amends and supplements the Tender Offer Statement on Schedule TO filed by AT&T Corp., a New York corporation ("AT&T"), and LMN Corporation, a Delaware corporation and a wholly owned subsidiary of AT&T ("Purchaser"), on February 22, 2000, as amended by Amendment No. 1 filed by AT&T and Purchaser on March 3, 2000 and Amendment No. 2 filed by AT&T and Purchaser on March 13, 2000 (as amended, the "Schedule TO"), relating to the offer (the "Offer") by Purchaser to purchase all outstanding shares of Common Stock, par value $0.10 per share (the "Shares"), of GRC International, Inc., a Delaware corporation ("GRC"), at a purchase price of $15.00 per Share, net to the seller in cash, upon the terms and subject to the conditions set forth in the Offer to Purchase (the "Offer to Purchase") and in the related Letter of Transmittal, copies of which are attached as Exhibits (a)(1) and (a)(2) to the Schedule TO. This Amendment also amends and supplements the Statement on Schedule 13D with respect to GRC filed by AT&T and Purchaser with the Securities and Exchange Commission on February 24, 2000. ITEMS 1 THROUGH 9 AND 11. - ------------------------ Items 1 through 9 and 11 of the Schedule TO are hereby amended and supplemented with the following information: On March 20, 2000, AT&T issued a press release announcing the extension of the period of time during which the Offer will remain open to 5:00 p.m., Eastern time, on Monday, March 27, 2000. The full text of AT&T's March 20, 2000 press release is attached as Exhibit (a)(11) hereto and incorporated herein by reference. ITEM 12. EXHIBITS - ------- Item 12 of the Schedule TO is hereby amended by adding thereto the following: (a)(11) Text of Press Release issued by AT&T on March 20, 2000. Page 2 of 4 Pages SIGNATURE After due inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Dated: March 21, 2000 LMN CORPORATION By /s/ Mary Jane McKeever ---------------------------------- Name: Mary Jane McKeever Title: President AT&T CORP. By /s/ Mary Jane McKeever ---------------------------------- Name: Mary Jane McKeever Title: Vice President Page 3 of 4 Pages EXHIBIT INDEX (a)(11) Text of press release issued by AT&T Corp. on March 20, 2000. Page 4 of 4 Pages