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. 5)*
Minerals
Technologies Inc.
______________________________________________
(Name
of
Issuer)
Common
Stock
______________________________________________
(Title
of
Class of Securities)
603158106
______________________________________________
(CUSIP
Number)
05
OCTOBER 2007
______________________________________________
(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 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
|
| 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 |
|
| 2. |
CHECK THE APPROPRIATE BOX
IF THE
MEMBER OF A GROUP* |
|
| |
|
|
(a) [_] |
| |
|
|
(b)
[_] |
| 3. |
SEC
USE ONLY |
|
|
| 4. |
CITIZENSHIP OR PLACE OF
ORGANIZATION |
|
| |
United
Kingdom, England |
|
|
| |
5. |
SOLE VOTING POWER |
| NUMBER
OF |
|
0 |
| SHARES |
6. |
SHARED VOTING POWER |
| BENEFICIALLY |
|
1,552,958 |
| OWNED BY |
7. |
SOLE DISPOTIVE POWER |
| EACH |
|
0 |
| REPORTING |
8. |
SHARED DISPOTIVE POWER |
| WITH |
|
2,889,472 |
|
|
|
|
| 9. |
AGGREGATE AMOUNT BENEFICIALLY
OWNED
BY EACH REPORTING PERSON |
|
| |
2,889,472 |
|
| 10. |
CHECK BOX IF AGGREGATE AMOUNT
IN
ROW (9) EXCLUDES CERTAIN SHARES* |
|
|
|
|
[_] |
| 11. |
PERCENT OF CLASS REPRESENTED
BY
AMOUNT IN ROW 9 |
|
|
|
14.99% |
|
| 12. |
TYPE OF REPORTING PERSON |
|
| |
IA |
|
| CUSIP No. 603158106 |
Schedule
13G
|
3
of 5
Pages
|
|
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.
| |
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 2,889,472
shares of the Issuer. |
|
(b) |
Percent of
Class:14.99% |
| (c) |
Number of shares as to which such person
has: |
| |
(i) |
sole
power to vote or to direct the vote |
0 |
|
| |
|
|
|
|
| |
(ii) |
shared
power to vote or to direct the vote |
1,552,958 |
|
| |
|
|
|
|
| |
(iii) |
sole
power to dispose or to direct the disposition
of |
0 |
|
| |
|
|
|
|
| |
(iv)
|
shared
power to dispose or to direct the disposition
of |
2,889,472 |
|
| CUSIP No. 603158106 |
Schedule
13G
|
4 of
5
Pages
|
| 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. |
| Item 9. |
Notice of Dissolution of
Group. |
| CUSIP No. 603158106 |
Schedule
13G
|
5 of
5
Pages
|
Exhibit
A
| |
(a) The following certification shall
be
included if the statement is
filed pursuant to Rule 13d-1(b): |
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//-- |
| |
Name:
Mark Thomas |
| |
Title:
Head of Group Funds |
| |
Date: October 09, 2007 |