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 Primus Telecommunications Group, Incorporated - ---------------------------------------------------------------------------- (Name of Issuer) Common Stock - ---------------------------------------------------------------------------- (Title of Class of Securities) 741929 10 - --------------------------------------------------------------------------- (CUSIP Number) ----------------- CUSPIS NO. 741929 10 13G PAGE 2 OF 6 PAGES 1. NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS K. PAUL SINGH - -------------------------------------------------------------------------------- - ---- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] - -------------------------------------------------------------------------------- - ---- 3. SEC USE ONLY - -------------------------------------------------------------------------------- - ---- 4. CITIZENSHIP OR PLACE OF ORGANIZATION U.S.A - -------------------------------------------------------------------------------- - ---- 5. SOLE VOTING POWER 4,425,579* NUMBER OF SHARES 6. SHARED VOTING POWER 484,900*

BENEFICIALLY 7. SOLE DISPOSITIVE POWER OWNED BY 4,028,751* EACH 8. SHARED DISPOSITIVE POWER REPORTING 484,900* PERSON WITH - -------------------------------------------------------------------------------- - ---- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 4,950,165* - -------------------------------------------------------------------------------- - ---- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES* [_] - -------------------------------------------------------------------------------- - ---- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 9.55% - -------------------------------------------------------------------------------- - ---- 12. TYPE OF REPORTING PERSON IN - -------------------------------------------------------------------------------- - ---- * See Item 4. ITEM 1(a). NAME OF ISSUER: Primus Telecommunications Group, Incorporated ITEM 1(b). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES: 1700 Old Meadow Road McLean, VA 22102 ITEM 2(a). NAME OF PERSON FILING: K. Paul Singh ITEM 2(b). ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE: Mr. Singh's business address is: 1700 Old Meadow Road McLean, VA 22102 ITEM 2(c). CITIZENSHIP United States of America ITEM 2(d). TITLE OF CLASS OF SECURITIES. Common Stock ITEM 2(e). CUSIP NUMBER 741929 10 ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULES 13D-1(b), OR 13D-2(b), CHECK WHETHER THE PERSON FILING IS A:

Not applicable Page 3 of 6 Pages ITEM 4. OWNERSHIP (a) AMOUNT BENEFICIALLY OWNED: 4,950,165** ** Such amount includes (i) 3,157,937 shares owned by Mr. Singh, (ii) 531,432 shares issuable to Mr. Singh upon the exercise of options granted to Mr. Singh, (iii) 377,786 shares owned by Mr. Singh's family, (iv) 396,828 shares held by a series of revocable trusts of which Mr. Singh is the trustee and pursuant to which Mr. Singh has sole voting power and shared dispositive power, (v) 484,900 shares held by a private foundation of which Mr. Singh is the President and a director, and (vi) 1,282 shares held in a 401(k) plan of which Mr. Singh is a beneficiary. (b) PERCENT OF CLASS: 9.55% (c) NUMBER OF SHARES AS TO WHICH SUCH PERSON HAS: (i) SOLE POWER TO VOTE OR TO DIRECT THE VOTE: 4,425,579 (ii) SHARED POWER TO VOTE OR TO DIRECT THE VOTE: 484,900 (iii) SOLE POWER TO DISPOSE OR TO DIRECT THE DISPOSITION OF: 4,028,751 (iv) SHARED POWER TO DISPOSE OR TO DIRECT THE DISPOSITION OF: 484,900 ITEM 5. OWNERSHIP OF FIVE PERCENT OF LESS OF A CLASS Not applicable ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON. Not applicable Page 4 of 6 Pages 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 Page 5 of 6 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. February 14, 2001 -------------------------------------------- (Date) /s/ K. PAUL SINGH -------------------------------------------- (Signature) K. Paul Singh -------------------------------------------- (Name) Page 6 of 6 Pages