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. 4)*
Minerals Technologies Inc.
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(Name of Issuer)
Common Stock
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(Title of Class of Securities)
603158106
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(CUSIP Number)
20 SEPTEMBER 2007
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(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)
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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 (the "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.)
(Continued on following pages)
Page 1 of 5 Pages
CUSIP No. 603158106 Schedule 13G Page 2 of 5 Pages
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1. NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
(ENTITIES ONLY)
M&G Investment Management Limited
No I.R.S Identification Number
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2. CHECK THE APPROPRIATE BOX IF THE MEMBER OF A GROUP*
(a) [_]
(b) [_]
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3. SEC USE ONLY
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4. CITIZENSHIP OR PLACE OF ORGANIZATION United Kingdom, England
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5. SOLE VOTING POWER
NUMBER OF 0
SHARES ------------------------------------------------------------
BENEFICIALLY 6. SHARED VOTING POWER
OWNED BY 1,566,432
EACH ------------------------------------------------------------
REPORTING 7. SOLE DISPOTIVE POWER
PERSON 0
WITH ------------------------------------------------------------
8. SHARED DISPOTIVE POWER
2,930,254
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9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,930,254
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10. CHECK BOX IF AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_]
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11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 15.20%
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12. TYPE OF REPORTING PERSON
IA
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CUSIP No. 603158106 Schedule 13G Page 3 of 5 Pages
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Item 1(a). Name of Issuer:
Minerals Technologies Corporation.
Item 1(b). Address of Issuer's Principal Executive Offices:
The Chrysler Building
405 Lexington Avenue
New York, NY 10174
United States
Item 2(a). Name of Person Filing:
M&G Investment Management Limited (MAGIM)
Item 2(b). Address of Principal Business Office or, if None, Residence:
Governor's House, Laurence Pountney Hill, London, EC4R 0HH
Item 2(c). Citizenship:
United Kingdom, England
Item 2(d). Title of Class of Securities:
Common Stock
Item 2(e). CUSIP Number:
603158106
Item 3. Type of Person:
(e) MAGIM is an investment advisor in accordance with s.240.13d-1(b)(1)(ii)(E)
Some of the securities covered by this report are owned legally by Vanguard
precious Metals and Mining Fund, MAGIM's investment advisory client. MAGIM has
sole investment power and no voting power in these securities.
Item 4. Ownership.
Provide the following information regarding the aggregate number
and percentage of the class of securities of the issuer identified
in Item 1.
(a) Amount Beneficially Owned: M&G, in its capacity as investment
manager, may be deemed to beneficially own 2,930,254 shares of the
Issuer.
(b) Percent of Class:15.20%
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote 0
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(ii) shared power to vote or to direct the
vote 1,566,432
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(iii) sole power to dispose or to direct the
disposition of 0
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(iv) shared power to dispose or to direct the
disposition of
2,930,254
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CUSIP No. 603158106 Schedule 13G Page 4 of 5 Pages
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Item 5. Ownership of Five Percent or Less of Class.
If this statement is being filed to report the fact that as of the
date hereof the reporting person has ceased to be the beneficial
owner of more than five percent of the class of securities, check
the following
[ ]
Item 6. Ownership of More than Five Percent on Behalf of Another
Person.
[ ]
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.
Not Applicable
Item 9. Notice of Dissolution of Group.
Not Applicable
CUSIP No. 603158106 Schedule 13G Page 5 of 5 Pages
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Exhibit A
Item 10. Certification.
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(a) The following certification shall be included if the statement is
filed pursuant to Rule 13d-1(b):
"By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were acquired and are held in
the ordinary course of business and 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. "
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.
By: --//Mark Thomas//--
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Name: Mark Thomas
Title: Head of Group Funds
Date: September 27, 2007