UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Juniper Networks, Inc. -------------------------------------------------------------------------------- (Name of Issuer) Common Stock, $.00001 par value -------------------------------------------------------------------------------- (Title of Class of Securities) 48203R104 -------------------------------------------------------------------------------- (CUSIP Number) July 1, 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: |_| Rule 13d-1(b) |X| 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 the disclosures provided in a prior cover page. The information required in 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). SCHEDULE 13G CUSIP NO. 48203R104 Page 2 of 8 Pages -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) SIEMENS CORPORATION -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a) |_| (b) |_| Not Applicable. -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware, United States of America -------------------------------------------------------------------------------- 5 SOLE VOTING POWER Not applicable. NUMBER OF ----------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 35,815,206 EACH ----------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH Not applicable. ----------------------------------------------- 8 SHARED DISPOSITIVE POWER 35,815,206 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 35,815,206 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (See Instructions) |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 9.7%* -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* CO -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! * The percentage set forth above is based upon an aggregate of 368,928,665 shares of common stock, par value $.00001 per share ("Common Stock"), of Juniper Networks, Inc. (the "Issuer") outstanding following the merger of Homer Acquisition Corporation, a wholly-owned subsidiary of the Issuer with and into Unisphere Networks, Inc., effective as of July 1, 2002. Page 2 of 8 Pages SCHEDULE 13G CUSIP NO. 48203R104 Page 2 of 8 Pages -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) SIEMENS AKTIENGESELLSCHAFT -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a) |_| (b) |_| Not Applicable. -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Federal Republic of Germany -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 5 SOLE VOTING POWER Not applicable. NUMBER OF ----------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 35,815,206 EACH ----------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH Not applicable. ----------------------------------------------- 8 SHARED DISPOSITIVE POWER 35,815,206 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 35,815,206 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (See Instructions) |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 9.7%* -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* CO -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! * The percentage set forth above is based upon an aggregate of 368,928,665 shares of Common Stock of the Issuer outstanding following the merger of Homer Acquisition Corporation, a wholly-owned subsidiary of the Issuer with and into Unisphere Networks, Inc., effective as of July 1, 2002. Page 3 of 8 Pages SCHEDULE 13G ------------ Item 1 (a) Name of Issuer: Juniper Networks, Inc. Item 1 (b) Address of Issuer's Principal Executive Offices: 1194 North Mathilda Avenue, Sunnyvale, CA 94089 Item 2 (a) Name of Person Filing: (1) Siemens Corporation (2) Siemens Aktiengesellschaft Item 2 (b) Address of Principal Business Office: The address of the principal business office of each person filing is: (1) 153 East 53rd Street, New York, New York 10022 (2) Wittelsbacherplatz 2, Munich, Germany 80333 Item 2 (c) Citizenship: The first person filing is a corporation organized under the laws of the State of Delaware, United States of America. The second person filing is a corporation organized under the laws of the Federal Republic of Germany. Item 2 (d) Title of Class of Securities: Common Stock, $.00001 par value Item 2 (e) CUSIP Number: 48203R104 Item 3 Not applicable. Item 4 Ownership: (a) Amount Beneficially Owned:35,815,206 (b) Percent of Class: 9.7%(1) (c) Number of Shares as to which such person has: (i) Sole power to vote or to direct the vote: ---------------- 1 The percentage set forth above is based upon an aggregate of 368,928,665 shares of Common Stock of the Issuer outstanding following the merger of Homer Acquisition Corporation, a wholly-owned subsidiary of the Issuer with and into Unisphere Networks, Inc., effective as of July 1, 2002. Page 4 of 8 Pages Not applicable. (ii) Shared power to vote or to direct the vote: 35,815,206 (iii) Sole power to dispose or to direct the disposition of: Not applicable (iv) Shared power to dispose or to direct the disposition of: 35,815,206 Item 5 Ownership of Five Percent or Less of a Class: Not Applicable. Item 6 Ownership of More than Five Percent on Behalf of Another Person: Not Applicable. Item 7 Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person: Not applicable. Item 8 Identification and Classification of Members of the Group: Not Applicable. Item 9 Notice of Dissolution of Group: Not Applicable. Item 10 Certification: By signing below we certify that, to the best of our knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. Page 5 of 8 Pages 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. SIEMENS CORPORATION Dated: July 10, 2002 By: /s/ E. Robert Lupone ----------------------------------- Name: E. Robert Lupone Title: Senior Vice President, General Counsel and Secretary By: /s/ Michael W. Schiefen ----------------------------------- Name: Michael W. Schiefen Title: Vice President Page 6 of 8 Pages 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. SIEMENS AKTIENGESELLSCHAFT Dated: July 10, 2002 By: /s/ Dr. Peter Gnam ----------------------------------- Dr. Peter Gnam Deputy General Counsel By: /s/ Dr. Otmar Schmitt ----------------------------------- Dr. Otmar Schmitt Corporate Finance Treasury Page 7 of 8 Pages AGREEMENT OF JOINT FILING Pursuant to Rule 13d-1(k)(1) of the Securities and Exchange Commission under the Securities and Exchange Act of 1934, as amended, each of the undersigned agrees that the statement on Schedule 13G filed herewith shall be filed on behalf of each of the undersigned. SIEMENS CORPORATION Dated: July 10, 2002 By: /s/ E. Robert Lupone ----------------------------------- Name: E. Robert Lupone Title: Senior Vice President, General Counsel and Secretary By: /s/ Michael W. Schiefen ----------------------------------- Name: Michael W. Schiefen Title: Vice President SIEMENS AKTIENGESELLSCHAFT Dated: July 10, 2002 By: /s/ Dr. Peter Gnam ----------------------------------- Dr. Peter Gnam Deputy General Counsel By: /s/ Dr. Otmar Schmitt ----------------------------------- Dr. Otmar Schmitt Corporate Finance Treasury Page 8 of 8 Pages