SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION STATEMENT PURSUANT TO RULES 13d-1 AND 13d-2 Under the Securities Exchange Act of 1934 (Amendment No. 1 ) TOWER AUTOMOTIVE, INC. ----------------------------------------------------- (Name of Issuer) Common Stock ----------------------------------------------------- (Title of Class of Securities) 891707101 ----------------------------------------------------- (CUSIP Number) Check the following box if a fee is being paid with this statement []. ---------- *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 ("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). CUSIP No. 891707101 13G Page 2 of 8 Pages -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSON(S) S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON(S) Morgan Stanley Dean Witter & Co. IRS # 39-314-5972 -------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [ ] -------------------------------------------------------------------------------- 3. SEC USE ONLY -------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION The state of organization is Delaware. -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES 0 BENEFICIALLY -------------------------------------------------------------- OWNED BY 6. SHARED VOTING POWER EACH 3,801,898 REPORTING -------------------------------------------------------------- PERSON 7. SOLE DISPOSITIVE POWER WITH 0 -------------------------------------------------------------- 8. SHARED DISPOSITIVE POWER 3,949,387 ------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,949,387 -------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 8.74% -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* IA, CO -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 891707101 13G Page 3 of 8 Pages -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSON(S) S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON(S) Miller Anderson & Sherrerd, LLP IRS # 23-1744122 -------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [ ] -------------------------------------------------------------------------------- 3. SEC USE ONLY -------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION The state of organization is Pennsylvania. -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES 0 BENEFICIALLY -------------------------------------------------------------- OWNED BY 6. SHARED VOTING POWER EACH 3,093,500 REPORTING -------------------------------------------------------------- PERSON 7. SOLE DISPOSITIVE POWER WITH 0 -------------------------------------------------------------- 8. SHARED DISPOSITIVE POWER 3,140,500 -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,140,500 -------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 6.95% -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* IA, CO -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 891707101 13G Page 4 of 8 Pages Item 1. (a) Name of Issuer: Tower Automotive, Inc. -------------------------------------------------------------- (b) Address of Issuer's Principal Executive Offices: 4508 IDS Center Minneapolis, MN 55402 -------------------------------------------------------------- Item 2. (a) Name of Person Filing: (a) Morgan Stanley Dean Witter & Co. (b) Miller Anderson & Sherrerd, LLP -------------------------------------------------------------- (b) Address of Principal Business Office, or if None, Residence: (a) 1585 Broadway New York, New York 10036 (b) 1 Tower Bridge Suite 1100 West Conshohocken, PA 19428 -------------------------------------------------------------- (c) Citizenship: Incorporated by reference to Item 4 of the cover page pertaining to each reporting person. ------------------------------------------------- (d) Title of Class of Securities: Common Stock -------------------------------------------------------------- (e) CUSIP Number: 891707101 ------------------------------------------------- Item 3. (a) Morgan Stanley Dean Witter & Co. is (e) an Investment Adviser registered under Section 203 of the Investment Advisers Act of 1940. (b) Miller Anderson & Sherrerd, LLP is (e) an Investment Adviser registered under Section 203 of the Investment Advisers Act of 1940. CUSIP No. 891707101 13-G Page 5 of 8 Pages Item 4. Ownership. Incorporated by reference to Items (5) - (9) and (11) of the cover page. Item 5. Ownership of Five Percent or Less of a Class. Inapplicable Item 6. Ownership of More Than Five Percent on Behalf of Another Person. Accounts managed on a discretionary basis by Miller Anderson & Sherrerd, LLP, a wholly owned subsidiary of Morgan Stanley Dean Witter & Co., are known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from, the sale of such securities. No such account holds more than 5 percent of the class. Item 7. Identification and Classification of the Subsidiary which Acquired the Security Being Reported on By the Parent Holding Company. Item 8. Identification and Classification of Members of the Group. Item 9. Notice of Dissolution of Group. Item 10. Certification. By signing below I certify that, to the best of my 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. CUSIP No. 891707101 13-G Page 6 of 8 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. Date: February 12, 2001 Signature: /s/ Dennine Bullard ----------------------------------------------------------------- Name/Title Dennine Bullard / Morgan Stanley & Co. Incorporated ----------------------------------------------------------------- MORGAN STANLEY DEAN WITTER & CO. Date: February 12, 2001 Signature: /s/ Paul A. Frick ----------------------------------------------------------------- Name/Title Paul A. Frick / Vice President Miller Anderson & Sherrerd, LLP ----------------------------------------------------------------- MILLER ANDERSON & SHERRERD, LLP INDEX TO EXHIBITS PAGE ----------------- ---- EXHIBIT 1 Agreement to Make a Joint Filing 7 EXHIBIT 2 Secretary's Certificate Authorizing Dennine Bullard 8 to Sign on behalf of Morgan Stanley Dean Witter & Co. * Attention. Intentional misstatements or omissions of fact constitute federal criminal violations (see 18 U.S.C. 1001). (022597DTI)