----------------------------------- OMB APPROVAL ----------------------------------- ----------------------------------- OMB Number: 3235-0145 Expires: December 31, 2005 Estimated average burden Hours per response . . . . . .11 ----------------------------------- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* OPNET TECHNOLOGIES, INC. -------------------------------------------------------------------------------- (Name of Issuer) Common Stock -------------------------------------------------------------------------------- (Title of Class of Securities) 683757108 ------------------------------------------------------- (CUSIP Number) December 31, 2002 -------------------------------------------------------------------------------- (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [X] Rule 13d-1(b) [ ] Rule 13d-1(c) [ ] Rule 13d-1(d) * The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page. The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). (Continued on following page(s)) Page 1 of 7 Pages ----------------------------------------------------- CUSIP No. 683757108 ----------------------------------------------------- ========== ===================================================================== 1 NAME OF REPORTING PERSON Van Wagoner Capital Management, Inc. - 94-3235240 ---------- --------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) |X| ---------- --------------------------------------------------------------------- 3 SEC USE ONLY ---------- --------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware --------------- --- ------------------------------------------------------------ NUMBER OF 5 SOLE VOTING POWER SHARES -0- --- ------------------------------------------------------------ BENEFICIALLY 6 SHARED VOTING POWER OWNED BY -0- --- ------------------------------------------------------------ EACH 7 SOLE DISPOSITIVE POWER REPORTING 682,500(1) --- ------------------------------------------------------------ PERSON 8 SHARED DISPOSITIVE POWER WITH -0- ----------- -------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 682,500(1) ----------- -------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES [ ] Not Applicable ----------- -------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 3.5%(1) ----------- -------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON IA ================================================================================ -------------------------- (1) The percent ownership calculated is based upon an aggregate of 19,287,263 shares outstanding as of October 31, 2002. Page 2 of 7 Pages ----------------------------------------------------- CUSIP No. 683757108 ----------------------------------------------------- ========== ===================================================================== 1 NAME OF REPORTING PERSON Van Wagoner Funds, Inc. - 39-1836332, 94-3256424, 94-3286386 ---------- --------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) |X| ---------- --------------------------------------------------------------------- 3 SEC USE ONLY ---------- --------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Maryland --------------- --- ------------------------------------------------------------ NUMBER OF 5 SOLE VOTING POWER SHARES 645,000(1) --- ------------------------------------------------------------ BENEFICIALLY 6 SHARED VOTING POWER OWNED BY -0- --- ------------------------------------------------------------ EACH 7 SOLE DISPOSITIVE POWER REPORTING -0- --- ------------------------------------------------------------ PERSON 8 SHARED DISPOSITIVE POWER WITH -0- ----------- -------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 645,000(1) ----------- -------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES [ ] Not Applicable ----------- -------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 3.3%(1) ----------- -------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON IV ================================================================================ -------------------------- (1) The percent ownership calculated is based upon an aggregate of 19,287,263 shares outstanding as of October 31, 2002. Page 3 of 7 Pages ----------------------------------------------------- CUSIP No. 683757108 ----------------------------------------------------- This Amendment No. 1 to the undersigned's Schedule 13G, which was originally filed on February 8, 2002 (the "Schedule 13G") with regard to OPNET Technologies, Inc. (the "Issuer") is being filed to amend Items 2(a), 2(b), 4 and 5 of the Schedule 13G. Except as expressly stated herein, there have been no material changes in the information set forth in the Schedule 13G. Item 2(a). Name of Person Filing: ---------- ---------------------- The persons filing this Schedule 13G are (i) Van Wagoner Capital Management, Inc., an investment adviser registered under Section 203 of the Investment Advisers Act of 1940 and (ii) Van Wagoner Funds, Inc., an investment company registered under the Investment Company Act of 1940. Van Wagoner Funds, Inc. includes three portfolios, each with a separate I.R.S. identification number, Van Wagoner Emerging Growth Fund, Van Wagoner Post-Venture Fund and Van Wagoner Technology Fund. Van Wagoner Capital Management, Inc. is the investment adviser to Van Wagoner Funds, Inc. Attached as Exhibit 1 hereto, which is incorporated by reference herein, is an agreement between Van Wagoner Capital Management, Inc. and Van Wagoner Funds, Inc. that this Schedule 13G is filed on behalf of each of them. Item 2(b). Address of Principal Business Office or, if none, Residence: ---------- ------------------------------------------------------------ 435 Pacific Avenue, Suite 400 San Francisco, CA 94133 (for both Van Wagoner Capital Management, Inc. and Van Wagoner Funds, Inc.) Item 4. Ownership ------- --------- Van Wagoner Capital Management, Inc. ------------------------------------ (a) Amount Beneficially Owned: 682,500* (b) Percent of Class: 3.5% (c) Number of shares as to which such person has: (i) sole power to vote or to direct the vote: -0- (ii) shared power to vote or to direct the vote: -0- (iii) sole power to dispose or to direct the disposition of: 682,500 (iv) shared power to dispose or to direct the disposition of: -0- -------------------------- * Van Wagoner Capital Management, Inc. and Van Wagoner Funds, Inc. share beneficial ownership over the same 645,000 shares. Page 4 of 7 Pages ----------------------------------------------------- CUSIP No. 683757108 ----------------------------------------------------- Van Wagoner Funds, Inc. ----------------------- (a) Amount Beneficially Owned: 645,000* (b) Percent of Class: 3.3% (c) Number of shares as to which such person has: (i) sole power to vote or to direct the vote: 645,000 (ii) shared power to vote or to direct the vote: -0- (iii) sole power to dispose or to direct the disposition of: -0- (iv) shared power to dispose or to direct the disposition of: -0- Item 5. Ownership of Five Percent or Less of a Class. ------- --------------------------------------------- If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following |X|. -------------------------- * Van Wagoner Capital Management, Inc. and Van Wagoner Funds, Inc. share beneficial ownership over the same 645,000 shares. Page 5 of 7 Pages ----------------------------------------------------- CUSIP No. 683757108 ----------------------------------------------------- Exhibits. --------- 1. Agreement to file Schedule 13G jointly. SIGNATURE After reasonable 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. January 30, 2003 --------------------------- Date VAN WAGONER CAPITAL MANAGEMENT, INC. By: /s/ Garrett R. Van Wagoner ----------------------------------------------- Garrett R. Van Wagoner, President VAN WAGONER FUNDS, INC. By: /s/ Garrett R. Van Wagoner ----------------------------------------------- Garrett R. Van Wagoner, President Page 6 of 7 Pages ----------------------------------------------------- CUSIP No. 683757108 ----------------------------------------------------- EXHIBIT 1 --------- AGREEMENT, dated as of January 30, 2003, by and among Van Wagoner Capital Management, Inc., a Delaware corporation and Van Wagoner Funds, Inc., a Maryland corporation. WHEREAS, in accordance with Rule 13d-1(k) of the Securities Exchange Act of 1934 (the "Act"), only one such statement need be filed whenever two or more persons are required to file a statement pursuant to Section 13(d) of the Act with respect to the same securities, provided that said persons agree in writing that such statement is filed on behalf of each of them. NOW, THEREFORE, in consideration of the premises and mutual agreements herein contained, the parties hereto agree as follows: Both Van Wagoner Capital Management, Inc. and Van Wagoner Funds, Inc. hereby agree, in accordance with Rule 13d-1(k) under the Act, to file one Statement on Schedule 13G relating to their ownership of the Common Stock of OPNET Technologies, Inc., and hereby further agree that said Statement shall be filed on behalf of both Van Wagoner Capital Management, Inc. and Van Wagoner Funds, Inc. Nothing herein shall be deemed to be an admission that the parties hereto, or any of them, are members of a "group" (within the meaning of Section 13(d) of the Act and the rules promulgated thereunder) with respect to any securities of OPNET Technologies, Inc. IN WITNESS WHEREOF, the parties have executed this agreement as of the date first written above. VAN WAGONER CAPITAL MANAGEMENT, INC. By: /s/ Garrett R. Van Wagoner -------------------------------------- Garrett R. Van Wagoner, President VAN WAGONER FUNDS, INC. By: /s/ Garrett R. Van Wagoner -------------------------------------- Garrett R. Van Wagoner, President Page 7 of 7 Pages