UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b) (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO FULE 13d-2(b) (Amendment No. 2) Storage Networks, Inc. -------------------------------------------------------------------------------- (Name of Issuer) Common Stock, $.001 par value per share -------------------------------------------------------------------------------- (Title of Class of Securities) 86211E 10 3 -------------- (CUSIP Number) December 31, 2001 -------------------------------------------------------------------------------- (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) [ ] Rule 13d-1(c) [X] 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). CUSIP No. 86211E 10 3 13G PAGE 2 OF 9 PAGES ----------- ------------------ -------------------------------------------------------------------------------- (1) NAMES OF REPORTING PERSONS. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). Greylock IX Limited Partnership -------------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [ ] -------------------------------------------------------------------------------- (3) SEC USE ONLY -------------------------------------------------------------------------------- (4) CITIZENSHIP OR PLACE OF ORGANIZATION Delaware -------------------------------------------------------------------------------- (5) SOLE VOTING POWER NUMBER OF SHARES See Item 5 BENEFICIALLY -------------------------------------------------------- OWNED BY (6) SHARED VOTING POWER EACH REPORTING See Item 5 PERSON WITH: -------------------------------------------------------- (7) SOLE DISPOSITIVE POWER See Item 5 -------------------------------------------------------- (8) SHARED DISPOSITIVE POWER See Item 5 -------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON See Item 5 -------------------------------------------------------------------------------- (10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [ ] -------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) See Item 5 -------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON* PN -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 86211E 10 3 13G PAGE 3 OF 9 PAGES ----------- ------------------ -------------------------------------------------------------------------------- (1) NAMES OF REPORTING PERSONS. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). Greylock IX GP Limited Partnership -------------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [ ] -------------------------------------------------------------------------------- (3) SEC USE ONLY -------------------------------------------------------------------------------- (4) CITIZENSHIP OR PLACE OF ORGANIZATION Delaware -------------------------------------------------------------------------------- (5) SOLE VOTING POWER NUMBER OF SHARES See Item 5 BENEFICIALLY -------------------------------------------------------- OWNED BY (6) SHARED VOTING POWER EACH REPORTING See Item 5 PERSON WITH: -------------------------------------------------------- (7) SOLE DISPOSITIVE POWER See Item 5 -------------------------------------------------------- (8) SHARED DISPOSITIVE POWER See Item 5 -------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON See Item 5 -------------------------------------------------------------------------------- (10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [ ] -------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) See Item 5 -------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON* PN -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 86211E 10 3 13G PAGE 4 OF 9 PAGES ----------- ------------------ -------------------------------------------------------------------------------- (1) NAMES OF REPORTING PERSONS. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). William W. Helman -------------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [ ] -------------------------------------------------------------------------------- (3) SEC USE ONLY -------------------------------------------------------------------------------- (4) CITIZENSHIP OR PLACE OF ORGANIZATION United States -------------------------------------------------------------------------------- (5) SOLE VOTING POWER NUMBER OF SHARES See Item 5 BENEFICIALLY -------------------------------------------------------- OWNED BY (6) SHARED VOTING POWER EACH REPORTING See Item 5 PERSON WITH: -------------------------------------------------------- (7) SOLE DISPOSITIVE POWER See Item 5 -------------------------------------------------------- (8) SHARED DISPOSITIVE POWER See Item 5 -------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON See Item 5 -------------------------------------------------------------------------------- (10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [ ] -------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) See Item 5 -------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 86211E 10 3 13G PAGE 5 OF 9 PAGES ----------- ------------------ -------------------------------------------------------------------------------- (1) NAMES OF REPORTING PERSONS. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). William S. Kaiser -------------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [ ] -------------------------------------------------------------------------------- (3) SEC USE ONLY -------------------------------------------------------------------------------- (4) CITIZENSHIP OR PLACE OF ORGANIZATION United States -------------------------------------------------------------------------------- (5) SOLE VOTING POWER NUMBER OF SHARES See Item 5 BENEFICIALLY -------------------------------------------------------- OWNED BY (6) SHARED VOTING POWER EACH REPORTING See Item 5 PERSON WITH: -------------------------------------------------------- (7) SOLE DISPOSITIVE POWER See Item 5 -------------------------------------------------------- (8) SHARED DISPOSITIVE POWER See Item 5 -------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON See Item 5 -------------------------------------------------------------------------------- (10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [ ] -------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) See Item 5 -------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 86211E 10 3 13G PAGE 6 OF 9 PAGES ----------- ------------------ ITEM 1(a) NAME OF ISSUER: Storage Networks, Inc. ITEM 1(b) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES: 100 Fifth Avenue Weston, MA 02451 ITEM 2(a) NAME OF PERSON FILING: Greylock IX Limited Partnership ("GIXLP"); Greylock IX GP Limited Partnership ("GIXGPLP"), the General Partner of GIXLP; William W. Helman and William S. Kaiser, each Co-Managing General Partners of GIXGPLP (each a "Co-Managing Partner"). ITEM 2(b) ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE: The address of the reporting persons is: 880 Winter Street Waltham, MA 02451 ITEM 2(c) CITIZENSHIP: GIXLP is a limited partnership organized under the laws of the State of Delaware. GIXGPLP is a limited partnership organized under the laws of the State of Delaware. Each of Mr. Helman and Mr. Kaiser is a citizen of the United States. ITEM 2(d) TITLE OF CLASS OF SECURITIES: Common Stock, par value $.001 per share (the "Common Stock"). ITEM 2(e) CUSIP NUMBER: 86211E 10 3 ITEM 3 DESCRIPTION OF PERSON FILING: Not applicable. ITEM 4 OWNERSHIP: (a) AMOUNT BENEFICIALLY OWNED: See Item 5 (b) PERCENT OF CLASS: GIXLP: See Item 5 GIXGPLP: See Item 5 Mr. Helman: See Item 5 Mr. Kaiser: See Item 5 CUSIP No. 86211E 10 3 13G PAGE 7 OF 9 PAGES ----------- ------------------ (c) NUMBER OF SHARES AS TO WHICH THE PERSON HAS: (i) sole voting power; (ii) shared voting power; (iii) sole dispositive power; (iv) shared dispositive power: See Item 5 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]. 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: 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: Not applicable. CUSIP No. 86211E 10 3 13G PAGE 8 OF 9 PAGES ----------- ------------------ Amendment No. 2 is being filed solely to include signatures that were erroneously ommitted from Amendment No. 1 filed 2/13/2002. SIGNATURE After reasonable inquiry and to the best of the knowledge and belief of each of the undersigned, each of the undersigned hereby certifies that the information set forth in this statement is true, complete and correct. DATED: February 14, 2002. GREYLOCK IX LIMITED PARTNERSHIP By: Greylock IX GP Limited Partnership General Partner By: /s/ William W. Helman ---------------------------- William W. Helman Co-Managing General Partner GREYLOCK IX GP LIMITED PARTNERSHIP By: /s/ William W. Helman --------------------------- William W. Helman Co-Managing General Partner /s/ William W. Helman ------------------------------------ William W. Helman /s/ William S. Kaiser ------------------------------------ William S. Kaiser