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1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.1)* MINERALS TECHNOLOGIES INC. (Name of Issuer) Common Stock, $.10 par value (Title of Class of Securities) 603158106 (CUSIP Number) December 31, 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) [X] Rule 13d-1(c) [ ] Rule 13d-1(d) *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). 2 CUSIP NO. 603158106 SCHEDULE 13G PAGE 2 OF 11 PAGES --------------------- ----- ----- (1) NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON TRANSAMERICA CORPORATION 94-0932740 --------------------------------------------------------------------- (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 -------------------------------------------------------- BENEFICIALLY (6) SHARED VOTING POWER OWNED BY 2,933,800* *SEE NOTE TO EXHIBIT A EACH -------------------------------------------------------- REPORTING (7) SOLE DISPOSITIVE POWER PERSON WITH 0 -------------------------------------------------------- (8) SHARED DISPOSITIVE POWER 2,933,800* *SEE NOTE TO EXHIBIT A -------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,933,800* *SEE NOTE TO EXHIBIT A --------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES [ ] --------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 13.96% --------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON HC --------------------------------------------------------------------- 3 CUSIP NO. 603158106 SCHEDULE 13G PAGE 3 OF 11 PAGES --------------------- ----- ----- (1) NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON TRANSAMERICA INVESTMENT SERVICES, INC. 94-1632699 --------------------------------------------------------------------- (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 -------------------------------------------------------- BENEFICIALLY (6) SHARED VOTING POWER OWNED BY 2,933,800 EACH -------------------------------------------------------- REPORTING (7) SOLE DISPOSITIVE POWER PERSON WITH 0 -------------------------------------------------------- (8) SHARED DISPOSITIVE POWER 2,933,800 -------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,933,800 --------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES [ ] --------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 13.96% --------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON IA --------------------------------------------------------------------- 4 CUSIP NO. 603158106 SCHEDULE 13G PAGE 4 OF 11 PAGES --------------------- ----- ----- (1) NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON TRANSAMERICA INSURANCE CORPORATION OF CALIFORNIA 95-2634355 --------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [ X ] --------------------------------------------------------------------- (3) SEC USE ONLY --------------------------------------------------------------------- (4) CITIZENSHIP OR PLACE OF ORGANIZATION CALIFORNIA --------------------------------------------------------------------- (5) SOLE VOTING POWER NUMBER OF 0 SHARES -------------------------------------------------------- BENEFICIALLY (6) SHARED VOTING POWER OWNED BY 1,772,300* *SEE NOTE TO EXHIBIT A EACH -------------------------------------------------------- REPORTING (7) SOLE DISPOSITIVE POWER PERSON WITH 0 -------------------------------------------------------- (8) SHARED DISPOSITIVE POWER 1,772,300* *SEE NOTE TO EXHIBIT A -------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,772,300* *SEE NOTE TO EXHIBIT A --------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES [ ] --------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 8.05% --------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON HC and IC --------------------------------------------------------------------- 5 CUSIP NO. 603158106 SCHEDULE 13G PAGE 5 OF 11 PAGES --------------------- ----- ----- (1) NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON TRANSAMERICA OCCIDENTAL LIFE INSURANCE COMPANY 95-1060502 --------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [ X ] --------------------------------------------------------------------- (3) SEC USE ONLY --------------------------------------------------------------------- (4) CITIZENSHIP OR PLACE OF ORGANIZATION CALIFORNIA --------------------------------------------------------------------- (5) SOLE VOTING POWER NUMBER OF 0 SHARES -------------------------------------------------------- BENEFICIALLY (6) SHARED VOTING POWER OWNED BY 1,772,300* *SEE NOTE TO EXHIBIT A EACH -------------------------------------------------------- REPORTING (7) SOLE DISPOSITIVE POWER PERSON WITH 0 -------------------------------------------------------- (8) SHARED DISPOSITIVE POWER 1,772,300* *SEE NOTE TO EXHIBIT A -------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,772,300* *SEE NOTE TO EXHIBIT A --------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES [ ] --------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 8.05% --------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON HC and IC --------------------------------------------------------------------- 6 Item 1(a). Name of Issuer. Minerals Technologies Inc. Item 1(b). Address of Issuer's Principal Executive Offices. 405 Lexington Avenue New York, NY 10174-1901 Item 2(a). Name of Person Filing. This statement is filed by Transamerica Corporation ("Transamerica"), Transamerica Insurance Corporation of California ("TICC"), Transamerica Occidental Life Insurance Company ("Occidental"), and Transamerica Investment Services, Inc. ("TIS") (collectively, the "Companies"). Item 2(b). Address of Principal Business Office or, if none, Residence. The address of Transamerica is 600 Montgomery Street, San Francisco, California 94111. The address of TICC, Occidental and TIS is 1150 South Olive Street, Los Angeles, California 90015. Item 2(c). Citizenship. Transamerica and TIS and are Delaware corporations. Occidental and TICC are California corporations. Item 2(d). Title of Class of Securities. Common Stock, $.10 par value ("Common Stock"). Item 2(e). CUSIP Number. 603158106 Item 3. Type of Reporting Person. Each of the Companies is filing this statement pursuant to Rule 13d-1(c) and Rule 13d-2(b). TIS is an investment adviser registered under Section 203 of the Investment Advisers Act of 1940. Transamerica is a parent holding company in accordance with Rule 13d-1(b)(1)(ii)(G). Occidental and TICC are insurance companies as defined in Section 3(a)(19) of the Securities Exchange Act of 1934 and parent holding companies in accordance with Rule 13d-1(b)(1)(ii)(G). Item 4. Ownership. Reference is hereby made to Items 5-9 and 11 of each of the cover pages to this statement, which items are incorporated by reference herein. Item 5. Ownership of Five Percent or Less of a Class. Not applicable. 7 Item 6. Ownership of More Than Five Percent on Behalf of Another Person. TIS is deemed to be the beneficial owner of 2,933,800 shares of Common Stock pursuant to separate arrangements whereby TIS acts as investment adviser to certain individuals and entities, including Occidental and Occidental's subsidiaries Transamerica Life Insurance and Annuity Company ("TALIAC") and Transamerica Life Insurance Company of Canada ("TLIC Canada"), all of which are insurance companies as defined in Section 3(a)(19) of the Securities Exchange Act of 1934 and are subsidiaries of Transamerica. Occidental, TALIAC and TLIC Canada directly own 935,000, 833,800 and 3,500 shares of Common Stock, respectively. Each of the individuals and entities for which TIS acts as investment adviser has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities purchased or held pursuant to such arrangements. Transamerica may be deemed to beneficially own 2,933,800 shares of Common Stock, of which 170,000 shares are directly owned by Transamerica. The remaining 2,763,800 shares, including 991,500 shares owned for the benefit of non-affiliate investment advisory clients of TIS, are beneficially owned by direct and indirect subsidiaries of Transamerica.* To the knowledge of the Companies, no other person has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Common Stock. *See Note to Exhibit A. Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company. Transamerica, which is a parent holding company in accordance with Rule 13d-1(b)(1)(ii)(G), is filing this statement pursuant to Rule 13d-1(c) and Rule 13d-2(b) and not pursuant to Rule 13d-1(d). The identity and Item 3 classification of its relevant subsidiaries are set forth on Exhibit A attached hereto and incorporated herein by reference. Item 8. Identification and Classification of Members of the Group. Not applicable. Item 9. Notice of Dissolution of Group. Not applicable. 8 Item 10. Certification. By signing below the undersigned certify that, to the best of their knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. 9 Signature After reasonable inquiry and to the best of their knowledge and belief, the undersigned certify that the information set forth in this statement is true, complete and correct. February 12, 1999 TRANSAMERICA CORPORATION By /s/ RICHARD N. LATZER ----------------------------------------------- Richard N. Latzer Senior Vice President and Chief Investment Officer TRANSAMERICA INVESTMENT SERVICES, INC. By /s/ RICHARD N. LATZER ----------------------------------------------- Richard N. Latzer President and Chief Executive Officer TRANSAMERICA INSURANCE CORPORATION OF CALIFORNIA By /s/ RICHARD N. LATZER ----------------------------------------------- Richard N. Latzer Attorney-in-Fact TRANSAMERICA OCCIDENTAL LIFE INSURANCE COMPANY By /s/ RICHARD N. LATZER ----------------------------------------------- Richard N. Latzer Chief Investment Officer 10 Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, the undersigned, Transamerica Corporation, a Delaware corporation, Transamerica Investment Services, Inc., a Delaware corporation, Transamerica Insurance Corporation of California, a California corporation, and Transamerica Occidental Life Insurance Company, a California corporation, and each of them, hereby agree that the statement on Schedule 13G dated February 12, 1999, and any amendments thereto, are filed on behalf of each of them. February 12, 1999 TRANSAMERICA CORPORATION By /s/ RICHARD N. LATZER ----------------------------------------------- Richard N. Latzer Senior Vice President and Chief Investment Officer TRANSAMERICA INVESTMENT SERVICES, INC. By /s/ RICHARD N. LATZER ----------------------------------------------- Richard N. Latzer President and Chief Executive Officer TRANSAMERICA INSURANCE CORPORATION OF CALIFORNIA By /s/ RICHARD N. LATZER ----------------------------------------------- Richard N. Latzer Attorney-in-Fact TRANSAMERICA OCCIDENTAL LIFE INSURANCE COMPANY By /s/ RICHARD N. LATZER ----------------------------------------------- Richard N. Latzer Chief Investment Officer 11 Exhibit A Each of Occidental, TALIAC and TLIC Canada is an insurance company as defined in Section 3(a)(19) of the Securities Exchange Act of 1934. TALIAC and TLIC Canada are wholly owned subsidiaries of Occidental, and Occidental is a wholly owned subsidiary of TICC. TICC is an insurance company as defined in Section 3(a)(19) of the Securities Exchange Act of 1934. TIS is an investment adviser registered under Section 203 of the Investment Advisers Act of 1940. Both TICC and TIS are wholly owned subsidiaries of Transamerica. Note: Management of the affairs of subsidiaries of Transamerica, including decisions respecting dispositions and/or voting of the shares of the Common Stock beneficially owned by such subsidiaries, resides in respective officers and directors of the subsidiaries and is not directed by Transamerica or other subsidiaries. Accordingly, the filing of this Schedule 13G by Transamerica is not intended as, and should not be deemed, an acknowledgment of beneficial ownership or shared voting or dispositive power by it of the shares of the Common Stock beneficially owned by its subsidiaries, and such beneficial ownership or attribution of shared voting or dispositive power is expressly disclaimed.