1 SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G (RULE 13d-102) 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) Marvell Technology Group Ltd. -------------------------------------------------------------------------------- (Name of Issuer) Common stock, par value $0.002 per share -------------------------------------------------------------------------------- (Title of Class of Securities) G 5876H105 -------------------------------------------------------------------------------- (CUSIP Number) December 31, 2000 -------------------------------------------------------------------------------- (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 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 5 pages. 2 -------------------- ----------------- CUSIP No. G 5876H105 13G Page 2 of 5 Pages -------------------- ----------------- -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Weili Dai -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES 8,950,000 BENEFICIALLY ---------------------------------------------------------- OWNED BY 6. SHARED VOTING POWER EACH 6,192,312 REPORTING ---------------------------------------------------------- PERSON 7. SOLE DISPOSITIVE POWER WITH 8,950,00 ---------------------------------------------------------- 8. SHARED DISPOSITIVE POWER 6,192,312 -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 15,142,312 -------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [ ] -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 13.1% -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! 3 ITEM 1(a). NAME OF ISSUER Marvell Technology Group Ltd. ITEM 1(b). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES Marvell Technology Group Ltd. Richmond House 3rd Floor Par la Ville Road Hamilton HM DX Bermuda ITEM 2(a). NAME OF PERSON FILING Weili Dai ITEM 2(b). ADDRESS OF PRINCIPAL BUSINESS OFFICE, OR, IF NONE, RESIDENCE Marvell Semiconductor, Inc. 645 Almanor Avenue Sunnyvale, CA 94085 ITEM 2(c). CITIZENSHIP United States ITEM 2(d). TITLE OF CLASS OF SECURITIES Common stock, par value $0.002 per share ITEM 2(e). CUSIP NUMBER G 5876H105 ITEM 3. Not Applicable ITEM 4. OWNERSHIP (a) Amount Beneficially Owned: 15,142,312 (b) Percent of Class: 13.1% (c) Number of shares as to which such person has: 3 4 (i) sole power to vote or to direct the vote: 8,950,000 (ii) shared power to vote or to direct the vote: 6,192,312* (iii) sole power to dispose or to direct the disposition of: 8,950,000 (iv) shared power to dispose or to direct the disposition of: 6,192,312* * The amounts reported consist of 6,100,000 shares held by the Sutardja Family Partners, of which the Reporting Person and Dr. Sehat Sutardja, the Reporting Person's husband, are the general partners, and 92,312 shares held jointly by the Reporting Person and Dr. Sutardja. 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 CLARIFICATION 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 4 5 SIGNATURE After reasonable inquiry and to the best of the undersigned's knowledge and belief, the undersigned certifies that the information set forth in this statement is true, complete and correct. DATED: February 9, 2001 By: /s/ Weili Dai ----------------------------------- Weili Dai 5