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SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 RULE 13d-2(b) (AMENDMENT NO. ___)(1) PRIMUS TELECOMMUNICATIONS GROUP, INCORPORATED (Name of Issuer) COMMON STOCK, PAR VALUE $0.01 PER SHARE (Title of Class of Securities) 741929 103 (CUSIP Number) JUNE 9, 1998 (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) - --------------------- (1) 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 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. 741929 103 13G PAGE 2 OF 7 PAGES - ----------------------------------- -------------------------------- - ------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Warburg, Pincus Investors, L.P. I.D. No. 13-3549187 - ------------------------------------------------------------------------------- 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 - ------------------------------------------------------------------------------- 5. SOLE VOTING POWER NUMBER OF 0 SHARES ------------------------------------------------------------ 6. SHARED VOTING POWER BENEFICIALLY 3,875,689 OWNED BY ------------------------------------------------------------ 7. SOLE DISPOSITIVE POWER EACH 0 REPORTING ------------------------------------------------------------ 8. SHARED DISPOSITIVE POWER PERSON WITH 3,875,689 - ------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,875,689 - ------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES* |_| - ------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 13.8% - ------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* PN - ------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! - ----------------------------------- -------------------------------- CUSIP NO. 741929 103 13G PAGE 3 OF 7 PAGES - ----------------------------------- -------------------------------- - ------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Warburg, Pincus & Co. I.D. No. 13-6358475 - ------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| - ------------------------------------------------------------------------------- 3. SEC USE ONLY - ------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION New York - ------------------------------------------------------------------------------- 5. SOLE VOTING POWER NUMBER OF 0 SHARES ------------------------------------------------------------ 6. SHARED VOTING POWER BENEFICIALLY 3,875,689 OWNED BY ------------------------------------------------------------ 7. SOLE DISPOSITIVE POWER EACH 0 REPORTING ------------------------------------------------------------ 8. SHARED DISPOSITIVE POWER PERSON WITH 3,875,689 - ------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,875,689 - ------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES* |_| - ------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 13.8% - ------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* PN - ------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! - ----------------------------------- -------------------------------- CUSIP NO. 741929 103 13G PAGE 4 OF 7 PAGES - ----------------------------------- -------------------------------- - ------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) E.M. Warburg, Pincus & Co., LLC I.D. No. 13-3536050 - ------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| - ------------------------------------------------------------------------------- 3. SEC USE ONLY - ------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION New York - ------------------------------------------------------------------------------- 5. SOLE VOTING POWER NUMBER OF 0 SHARES ------------------------------------------------------------ 6. SHARED VOTING POWER BENEFICIALLY 3,875,689 OWNED BY ------------------------------------------------------------ 7. SOLE DISPOSITIVE POWER EACH 0 REPORTING ------------------------------------------------------------ 8. SHARED DISPOSITIVE POWER PERSON WITH 3,875,689 - ------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,875,689 - ------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES* |_| - ------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 13.8% - ------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* 00 - ------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! - ----------------------------------- -------------------------------- CUSIP NO. 741929 103 13G PAGE 5 OF 7 PAGES - ----------------------------------- -------------------------------- ITEM 1(a). NAME OF ISSUER. Primus Telecommunications Group, Incorporated, a Delaware corporation (the "Issuer"). ITEM 1(b). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES. 1700 Old Meadow Road Suite 300 McLean, Virginia 22102 ITEMS 2(a) AND 2(b). NAME OF PERSON FILING; ADDRESS OF PRINCIPAL BUSINESS OFFICE. This statement is filed by and on behalf of (a) Warburg, Pincus Investors, L.P., a Delaware limited partnership ("WPI"); (b) Warburg, Pincus & Co., a New York general partnership ("WP"); and (c) E.M. Warburg, Pincus & Co., LLC, a New York limited liability company ("EMW LLC"), which manages WPI. WP, the sole general partner of WPI, has a 20% interest in the profits of WPI, as the general partner. Lionel I. Pincus is the managing partner of WP, the Chairman of the Board, Chief Executive Officer and the managing member of EMW LLC and may be deemed to control both WP and EMW LLC. The members of EMW LLC are substantially the same as the partners of WP. The business address of each of the foregoing is 466 Lexington Avenue, New York, New York 10017. ITEM 2(c). CITIZENSHIP. Not Applicable. ITEM 2(d). TITLE OF CLASS OF SECURITIES. This statement relates to shares of the Issuer's common stock, par value $0.01 per share (the "Common Stock"). ITEM 2(e). CUSIP NUMBER. 741929 103 ITEM 3. Not Applicable. ITEM 4. OWNERSHIP. (a) Amount Beneficially Owned: 3,875,689 shares of Common Stock, as of December 31, 1998. - ----------------------------------- -------------------------------- CUSIP NO. 741929 103 13G PAGE 6 OF 7 PAGES - ----------------------------------- -------------------------------- (b) Percent of Class: 13.8% (based on the number of shares of Common Stock reported to be outstanding in the Issuer's Form 10-Q for the fiscal quarter ended September 30, 1998). (c) (i) 0 (ii) 3,875,689 (iii) 0 (iv) 3,875,689 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. Not Applicable. ITEM 9. NOTICE OF DISSOLUTION OF GROUP. Not Applicable. ITEM 10. CERTIFICATIONS. Not Applicable. - ----------------------------------- -------------------------------- CUSIP NO. 741929 103 13G PAGE 7 OF 7 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. Dated: February 9, 1999 WARBURG, PINCUS INVESTORS, L.P. By: Warburg, Pincus & Co., General Partner By:/s/ Stephen Distler --------------------------------------- Stephen Distler, Partner Dated: February 9, 1999 WARBURG, PINCUS & CO. By:/s/ Stephen Distler --------------------------------------- Stephen Distler, Partner Dated: February 9, 1999 E.M. WARBURG, PINCUS & CO., LLC By:/s/ Stephen Distler --------------------------------------- Stephen Distler, Member SCHEDULES Schedule I Joint Filing Agreement, dated February 9, 1999, among the signatories of this Schedule 13G.
JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)(1) The undersigned acknowledge and agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that it knows or has reason to believe that such information is inaccurate. This Agreement may be executed in any number of counterparts and all of such counterparts taken together shall constitute one and the same instrument. Dated: February 9, 1999 WARBURG, PINCUS INVESTORS, L.P. By: Warburg, Pincus & Co., General Partner By:/s/ Stephen Distler -------------------------------------- Stephen Distler, Partner WARBURG, PINCUS & CO. By:/s/ Stephen Distler -------------------------------------- Stephen Distler, Partner E.M. WARBURG, PINCUS & CO., LLC By:/s/ Stephen Distler -------------------------------------- Stephen Distler, Member