3 1 e3.txt FORM 3 1 OMB APPROVAL ------------------------- OMB Number: 3235-0104 ------------------------- Expires: October 31, 2001 ------------------------- Estimated average burden hours per response...0.5 U.S. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 3 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(f) of the Investment Company Act of 1940 ________________________________________________________________________________ 1. Name and Address of Reporting Person* Media Metrix, Inc. -------------------------------------------------------------------------------- (Last) (First) (Middle) 250 Park Avenue South -------------------------------------------------------------------------------- (Street) New York, New York 10003 -------------------------------------------------------------------------------- (City) (State) (Zip) ________________________________________________________________________________ 2. Date of Event Requiring Statement (Month/Day/Year) 06/26/00 ________________________________________________________________________________ 3. IRS Identification Number of Reporting Person, if an Entity (Voluntary) ________________________________________________________________________________ 4. Issuer Name and Ticker or Trading Symbol Jupiter Communications, Inc. (Symbol NASDAQ: JPTR) ________________________________________________________________________________ 5. Relationship of Reporting Person to Issuer (Check all applicable) [ ] Director [X] 10% Owner [ ] Officer (give title below) [ ] Other (specify below) (SEE ATTACHED) ________________________________________________________________________________ 6. If Amendment, Date of Original (Month/Day/Year) ________________________________________________________________________________ 7. Individual or Joint/Group Filing (Check applicable line) [X] Form Filed by One Reporting Person [ ] Form Filed by More than One Reporting Person ================================================================================ Table I -- Non-Derivative Securities Beneficially Owned ================================================================================

(Over) 2 FORM 3 (continued) Table II -- Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities) ================================================================================

/s/ Mary Ann Packo 07/06/00 --------------------------------------------- ----------------------- **Signature of Reporting Person Date Mary Ann Packo, President and Chief Operating Officer on behalf of Media Metrix, Inc. * If the form is filed by more than one reporting person, see Instruction 5(b)(v). ** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a). Note: File three copies of this Form, one of which must be manually signed. If space provided is insufficient, see Instruction 6 for procedure. Page 2

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