UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G-A (Rule 13d-102) Information Statement Pursuant to Rules 13d-1 and 13d-2 Under the Securities Exchange Act of 1934 (Amendment No. 1)* Cellular Technical Services Co., Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 151167103 (CUSIP Number) *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). Page 1 of 15 PagesCUSIP No. 151167103 13G Page 2 of 15 Pages - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON President and Fellows of Harvard College - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [X] (b) [ ] - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Massachusetts - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER NUMBER OF 3,080,000 shares ---------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY -- ---------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 3,080,000 shares ---------------------------------------------------- WITH 8 SHARED DISPOSITIVE POWER -- - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,080,000 shares - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN [ ] SHARES* - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 13.9% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON * EP - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 2 of 15 Pages CUSIP No. 151167103 13G Page 3 of 15 Pages - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON The Harvard University Master Trust Fund - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |X| (b) |_| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Massachusetts - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER NUMBER OF 116,400 shares ---------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY -- ---------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 116,400 shares ---------------------------------------------------- WITH 8 SHARED DISPOSITIVE POWER -- - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 116,400 shares - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN [ ] SHARES* - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.5% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON * EP - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 3 of 15 Pages CUSIP No. 151167103 13G Page 4 of 15 Pages - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Harvard Charitable Remainder Trust Equity Partnerships - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [X] (b) [ ] - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Massachusetts - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER NUMBER OF 6,800 shares ---------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY -- ---------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 6,800 shares ---------------------------------------------------- WITH 8 SHARED DISPOSITIVE POWER -- - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 6,800 shares - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN [ ] SHARES* - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.0% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON * EP - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 4 of 15 Pages SCHEDULE 13G Item 1(a) Name of Issuer: Cellular Technical Services Co., Inc. 1(b) Address of Issuer's Principal Executive Offices: 2401 Fourth Avenue Suite 808 Seattle, WA 98121 Item 2(a) Name of Person Filing: (i) President and Fellows of Harvard College ("P&F") (ii) The Harvard University Master Trust Fund ("HUMT") (iii) Harvard Charitable Remainder Trust Equity Partnerships ("HCRT") 2(b) Address of Principal Business Office or, if none, Residence: (i) P&F: c/o Harvard Management Company, Inc. 600 Atlantic Avenue Boston, MA 02210 (ii) HUMT: 1350 Massachusetts Avenue Holyoke Center, Room 340 Cambridge, MA 02138 (iii) HCRT: c/o Harvard Management Company, Inc. 600 Atlantic Avenue Boston, MA 02210 2(c) Citizenship: (i) P&F: Massachusetts (ii) HUMT: Massachusetts (iii) HCRT: Massachusetts 2(d) Title of Class of Securities: Common Stock 2(e) CUSIP Number: 151167103 Item 3 If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b): The entities filing are a Group in accordance with rule 13d-1(b)(l)(ii)(H). Page 5 of 15 Pages Item 4 Ownership: 4(a) Amount beneficially owned: (i) P&F: 3,080,000 shares (ii) HUMT: 116,400 shares (iii) HCRT: 6,800 shares 4(b) Percent of Class: (i) P&F: 13.9% (ii) HUMT: 0.5% (iii) HCRT: 0.0% 4(c) Number of shares as to which such person has: (i) sole power to vote or to direct the vote: (i) P&F: 3,080,000 shares (ii) HUMT: 116,400 shares (iii) HCRT: 6,800 shares (ii) shared power to vote or to direct the vote: --------- (iii) sole power to dispose or to direct the disposition of: (i) P&F: 3,080,000 shares (ii) HUMT: 116,400 shares (iii) HCRT: 6,800 shares (iv) shared power to dispose or to direct the disposition of: -------- 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: Not Applicable. Item 8 Identification and Classification of Members of the Group: See Exhibit A. Item 9 Notice of Dissolution of Group: Not Applicable. Page 6 of 15 Pages Item 10 Certification: By signing below the undersigned certifies that, to the best of its knowledge and belief, the securities referred to above were acquired in the ordinary course of business and were not acquired for the purpose of and do not have the effect of changing or influencing the control of the issuer of such securities and were not acquired in connection with or as a participant in any transaction having such purpose or effect. After reasonable inquiry and to the best of its knowledge and belief, the undersigned certifies that the information set forth in this statement is true, complete and correct. PRESIDENT AND FELLOWS OF HARVARD COLLEGE By: /s/ Verne O. Sedlacek ------------------------------- Name: Verne O. Sedlacek Title: Authorized Signatory THE HARVARD UNIVERSITY MASTER TRUST FUND By: /s/ Verne O. Sedlacek ------------------------------- Name: Verne O. Sedlacek Title: Authorized Signatory HARVARD CHARITABLE REMAINDER TRUST EQUITY PARTNERSHIPS By: /s/ Verne O. Sedlacek ------------------------------- Name: Verne O. Sedlacek Title: Authorized Signatory February 12, 1997 Pursuant to Rule 101(a)(2)(ii) of Regulation S-T, attached hereto as Exhibit B to this Schedule 13G-A is a copy of the initial Schedule 13G. Page 7 of 15 Pages Exhibit A Member of Group Item 3 Classification --------------- --------------------- (1) President and Fellows of Harvard College EP (2) The Harvard University Master Trust Fund EP (3) Harvard Charitable Remainder Trust Equity Partnerships EP Page 8 of 15 Pages Exhibit B UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Cellular Technical Services Co., Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 151167103 (CUSIP Number) Check the following box if a fee is being paid with the statement |X| (A fee is not required only if the reporting person: (1) has a previous statement on file reporting beneficial ownership of more than five percent of the class of securities described in Item 1; and (2) has filed no amendment subsequent thereto reporting beneficial ownership of five percent or less of such class.) (See Rule 13d-7.) *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). Page 9 of 15 Pages CUSIP No. 151167103 13G Page 10 of 15 Pages - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON President and Fellows of Harvard College - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [X] (b) [ ] - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Massachusetts - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER NUMBER OF 1,050,397 shares ---------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY -- ---------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 1,050,397 shares ---------------------------------------------------- WITH 8 SHARED DISPOSITIVE POWER -- - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,050,397 shares - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN [ ] SHARES* - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 9.7% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON * EP - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 10 of 15 Pages CUSIP No. 151167103 13G Page 11 of 15 Pages - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Harvard Yenching Institute - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [X] (b) [ ] - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Massachusetts - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER NUMBER OF 12,800 shares ---------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY -- ---------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 12,800 shares ---------------------------------------------------- WITH 8 SHARED DISPOSITIVE POWER -- - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 12,800 shares - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN [ ] SHARES* - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.1% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON * EP - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 11 of 15 Pages SCHEDULE 13G Item 1(a) Name of Issuer: Cellular Technical Services Co., Inc. 1(b) Address of Issuer's Principal Executive Offices: 2401 Fourth Avenue Suite 808 Seattle, WA 98121 Item 2(a) Name of Person Filing: (i) President and Fellows of Harvard College ("P&F") (ii) Harvard Yenching Institute ("HYI") 2(b) Address of Principal Business Office or, if none, Residence: (i) President and Fellows of Harvard College c/o Harvard Management Company, Inc. 600 Atlantic Avenue Boston, MA 02210 (ii) Harvard Yenching Institute 2 Divinity Avenue Cambridge, MA 02138 2(c) Citizenship: (i) P&F: Massachusetts (ii) HYI: Massachusetts 2(d) Title of Class of Securities: Common Stock 2(e) CUSIP Number: 151167103 Item 3 If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b): The entities filing are a Group in accordance with Rule 13d-1(b)(1)(ii)(H). Item 4(a) Amount beneficially owned: (i) P&F: 1,050,397 shares (ii) HYI: 12,800 shares 4(b) Percent of Class: (i) P&F: 9.7% (ii) HYI: 0.1% Page 12 of 15 Pages 4(c) Number of shares as to which such person has: (i) sole power to vote or to direct the vote: (i) P&F: 1,050,397 shares (ii) HYI: 12,800 shares (ii) shared power to vote or to direct the vote: ------- (iii) sole power to dispose or to direct the disposition of: (i) P&F: 1,050,397 shares (ii) HYI: 12,800 shares (iv) shared power to dispose or to direct the disposition of: ------- 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: Not Applicable. Item 8 Identification and Classification of Members of the Group: See Exhibit A attached hereto. Item 9 Notice of Dissolution of Group: Not Applicable. Item 10 Certification: By signing below the undersigned certifies that, to the best of its knowledge and belief, the securities referred to above were acquired in the ordinary course of business and were not acquired for the purpose of and do not have the effect of changing or influencing the control of the issuer of such securities and were not acquired in connection with or as a participant in any transaction having such purposes or effect. Page 13 of 15 Pages After reasonable inquiry and to the best of its knowledge and belief, the undersigned certifies that the information set forth in this statement is true, complete and correct. PRESIDENT AND FELLOWS OF HARVARD COLLEGE By: /s/ Verne O. Sedlacek ----------------------------------- Name: Verne O. Sedlacek Title: Authorized Signatory HARVARD YENCHING INSTITUTE By: /s/ Verne O. Sedlacek ----------------------------------- Name: Verne O. Sedlacek Title: Authorized Signatory February 13, 1996 Page 14 of 15 Pages Exhibit A Member of Group Item 3 Classification (1) President and Fellows of Harvard College EP (2) Harvard Yenching Institute EP Page 15 of 15 Pages